CN114959293B - Smelting method of low-lead silver concentrate - Google Patents
Smelting method of low-lead silver concentrate Download PDFInfo
- Publication number
- CN114959293B CN114959293B CN202210622335.1A CN202210622335A CN114959293B CN 114959293 B CN114959293 B CN 114959293B CN 202210622335 A CN202210622335 A CN 202210622335A CN 114959293 B CN114959293 B CN 114959293B
- Authority
- CN
- China
- Prior art keywords
- silver
- lead
- smelting
- low
- reduction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000003723 Smelting Methods 0.000 title claims abstract description 179
- 239000012141 concentrate Substances 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 82
- 229910052709 silver Inorganic materials 0.000 claims abstract description 163
- 239000004332 silver Substances 0.000 claims abstract description 163
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 154
- 239000002893 slag Substances 0.000 claims abstract description 97
- 230000009467 reduction Effects 0.000 claims abstract description 87
- 230000003647 oxidation Effects 0.000 claims abstract description 40
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 40
- 238000002156 mixing Methods 0.000 claims abstract description 28
- 238000011084 recovery Methods 0.000 claims abstract description 24
- 238000005469 granulation Methods 0.000 claims abstract description 6
- 230000003179 granulation Effects 0.000 claims abstract description 6
- 238000011946 reduction process Methods 0.000 claims abstract description 5
- 238000007664 blowing Methods 0.000 claims description 51
- 230000008569 process Effects 0.000 claims description 44
- LWUVWAREOOAHDW-UHFFFAOYSA-N lead silver Chemical compound [Ag].[Pb] LWUVWAREOOAHDW-UHFFFAOYSA-N 0.000 claims description 43
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 38
- 239000003546 flue gas Substances 0.000 claims description 38
- 239000000463 material Substances 0.000 claims description 38
- 229910001316 Ag alloy Inorganic materials 0.000 claims description 36
- 239000000446 fuel Substances 0.000 claims description 34
- 230000004907 flux Effects 0.000 claims description 32
- 239000003245 coal Substances 0.000 claims description 30
- 239000003638 chemical reducing agent Substances 0.000 claims description 29
- 239000000428 dust Substances 0.000 claims description 27
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 26
- 239000001301 oxygen Substances 0.000 claims description 26
- 229910052760 oxygen Inorganic materials 0.000 claims description 26
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 21
- 239000000779 smoke Substances 0.000 claims description 21
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 19
- 229910052725 zinc Inorganic materials 0.000 claims description 19
- 239000011701 zinc Substances 0.000 claims description 19
- 229910001297 Zn alloy Inorganic materials 0.000 claims description 18
- 239000008187 granular material Substances 0.000 claims description 17
- BSWGGJHLVUUXTL-UHFFFAOYSA-N silver zinc Chemical compound [Zn].[Ag] BSWGGJHLVUUXTL-UHFFFAOYSA-N 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 16
- 239000008235 industrial water Substances 0.000 claims description 14
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000007670 refining Methods 0.000 claims description 13
- 235000019738 Limestone Nutrition 0.000 claims description 12
- 239000006028 limestone Substances 0.000 claims description 12
- 239000000571 coke Substances 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 9
- 239000003345 natural gas Substances 0.000 claims description 7
- 230000001502 supplementing effect Effects 0.000 claims description 6
- 230000001590 oxidative effect Effects 0.000 claims description 5
- 239000002918 waste heat Substances 0.000 claims description 5
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 4
- 229910001882 dioxygen Inorganic materials 0.000 claims description 4
- 239000003517 fume Substances 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 230000003009 desulfurizing effect Effects 0.000 claims description 3
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 3
- 229910052683 pyrite Inorganic materials 0.000 claims description 3
- 239000011028 pyrite Substances 0.000 claims description 3
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 claims description 3
- 239000010453 quartz Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 14
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 description 10
- NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Chemical compound [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000011707 mineral Substances 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 229910052946 acanthite Inorganic materials 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 229910000464 lead oxide Inorganic materials 0.000 description 4
- 229910052981 lead sulfide Inorganic materials 0.000 description 4
- 229940056932 lead sulfide Drugs 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 4
- 229910001923 silver oxide Inorganic materials 0.000 description 4
- XUARKZBEFFVFRG-UHFFFAOYSA-N silver sulfide Chemical compound [S-2].[Ag+].[Ag+] XUARKZBEFFVFRG-UHFFFAOYSA-N 0.000 description 4
- 229940056910 silver sulfide Drugs 0.000 description 4
- 239000011133 lead Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 229910000978 Pb alloy Inorganic materials 0.000 description 2
- 241001062472 Stokellia anisodon Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910001043 Chinese silver Inorganic materials 0.000 description 1
- 241001417490 Sillaginidae Species 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/02—Obtaining noble metals by dry processes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B13/00—Obtaining lead
- C22B13/02—Obtaining lead by dry processes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a smelting method of low-lead silver concentrate. The method comprises a mixing granulation step, an oxidation smelting step, a reduction smelting step and a fuming reduction step. The invention can economically and effectively treat the low-lead silver concentrate by the oxidation smelting-silver-rich slag direct reduction smelting-reducing slag fuming reduction process of the low-lead silver concentrate, and has the advantages of smooth production process, small slag quantity and higher silver recovery rate.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to a smelting method of low-lead silver concentrate.
Background
Silver is an important industrial raw material. In the current Chinese silver consumption, the industrial raw material accounts for 70% of the total consumption, and along with the expansion of the application field of the silver, the demand of the silver is continuously increased. At present, domestic silver production mainly comes from three fields of independent silver ore, associated silver ore and regeneration recovery, wherein mineral silver (comprising independent silver ore and associated silver ore) accounts for more than 60% of the total yield of silver.
The proportion of the associated silver ore is high, and the mineral composition is complex, so that the concentrate is treated in an environment-friendly and economic mode to recover valuable metals such as silver, copper, lead, zinc and the like in the associated silver ore.
Silver concentrate associated with lead and zinc exists in the form of sulphide ore, and can be beneficiated by a flotation process. For silver concentrate with higher lead grade, concentrate with lead grade of 50-60% can be obtained after ore dressing, the concentrate can be directly used as a raw material for lead smelting to obtain metallic lead, most of silver is enriched in the lead in the process, and silver is separated through electrolysis and refining of crude lead, so that lead and silver are respectively recovered.
When the lead grade in the silver concentrate is lower and the silver content is higher (the lead grade of the low-lead silver concentrate is usually less than 35 percent, and the silver grade is usually 0.03-1.5 percent), if the silver is directly recovered as a raw material through the existing smelting process, crude lead cannot be produced in the smelting stage due to the too low lead content, and crude lead and silver produced in the reduction stage are too high in content, scum is easy to separate out, a lead discharge port is blocked, and the production cannot be normally carried out. Meanwhile, the electrolytic refining of the high-silver crude lead is not mature in industrial practice, so that the problem of difficult lead-silver separation can be caused.
Aiming at the characteristics of low-lead silver concentrate, in some production processes, the concentrate and the low-silver lead concentrate are mixed to improve the lead content in the concentrate, and then the minerals are treated by a lead smelting process to recover silver, lead, copper and the like. However, in the existing production process, excessive silver remains in the obtained slag in the smelting process of mixing the low-lead silver concentrate with the low-silver lead concentrate, the silver is difficult to separate and recycle, and for the smelting process, the silver content in the smelting slag is reduced infinitely, so that the smelting slag is neither economical nor difficult to operate. In addition, the existing technology smelts the low-lead silver concentrate and the low-silver lead concentrate, although the lead-containing grade of the material fed into the furnace is improved, the silver content in the crude lead of the reduction furnace is reduced, and the normal smelting process can be ensured, the silver content of the material fed into the furnace is reduced when the material is mixed with other materials, especially the slag content in the smelting process is increased, the silver content lost with slag is also increased, and the silver recovery rate is reduced.
In a word, there is no production practice of separately treating low-lead silver concentrate at present, but when the low-lead silver concentrate is mixed with the low-lead silver concentrate, the problems of large slag quantity, low silver recovery rate and the like exist.
Disclosure of Invention
The invention mainly aims to provide a smelting method of low-lead silver concentrate, which aims to solve the problems of difficult lead-silver separation, large slag quantity, low silver recovery rate and the like in the smelting process of low-lead silver concentrate in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided a smelting method of low-lead silver concentrate, in which silver content is 0.03 to 1.5wt% and lead content is 28 to 35wt%, comprising the steps of: and (3) mixing and granulating: mixing and granulating the low-lead silver concentrate with a first fuel and a first flux to form mixed granules; oxidizing and smelting: putting the mixed granules into a bottom-blowing smelting furnace, blowing first oxygen into the bottom-blowing smelting furnace through a bottom-blowing spray gun to oxidize and smelt the mixed granules, and supplementing lead into the bottom-blowing smelting furnace in the oxidation smelting process to obtain a first part of lead-silver alloy, silver-rich slag and first flue gas; wherein the lead material is first desilvered lead and/or regenerated lead; a reduction smelting step: feeding the silver-rich slag into a reduction smelting furnace, blowing second oxygen into the reduction smelting furnace, and adding a first reducing agent, a second flux and a second fuel to carry out reduction smelting on the silver-rich slag to obtain a second part of lead-silver alloy, reduction slag and second flue gas; and (3) fuming reduction: and carrying out fuming reduction on the reducing slag under the action of a second reducing agent and process air to obtain fuming slag and third flue gas.
Further, the smelting method also comprises the following steps: mixing the first part of lead-silver alloy and the second part of lead-silver alloy, and then adding zinc for silver removal to obtain silver-zinc alloy and liquid second desilvered lead; preferably, at least part of the liquid second desilvering lead is used as the first desilvering lead; preferably, the secondary lead is selected from solid lead and/or lead grids.
Further, in the oxidation smelting step, the addition amount of the lead material is 25-35% of the weight of the low-lead silver concentrate, and the smelting temperature is 1080-1150 ℃; preferably, the blowing amount of the first oxygen is 80-120 Nm per ton of the mixed granules 3 /h; more preferably, during the injection of the first oxygen gas, nitrogen gas and demineralized water are simultaneously injected into the bottom-blown smelting furnace.
Further, the first fuel is one or more of crushed coal, coke and lump coal; the first flux is one or more of limestone, quartz stone and pyrite; preferably, in the mixing granulation step, the amount of the first fuel is 0.5-1.5% of the weight of the low-lead silver concentrate, and the amount of the first flux is 2-6% of the weight of the low-lead silver concentrate; preferably, the low lead silver concentrate, the first fuel and the first flux are mixed and granulated by adding industrial water.
Further, the first reducing agent is one or more of pulverized coal, lump coal, natural gas and coke; the second flux is limestone; the second fuel is one or more of pulverized coal and crushed coal; preferably, the dosage of the first reducing agent is 4-8% of the weight of the silver-rich slag; the dosage of the second flux is 3-6% of the weight of the silver-rich slag; the dosage of the second fuel is 0.5-5% of the weight of the silver-rich slag.
Further, in the reduction smelting step, the injection amount of the second oxygen corresponding to each ton of silver-rich slag is 30-80 Nm 3 And/h, wherein the smelting temperature is 1150-1250 ℃.
Further, the reduction smelting step includes: mixing a second flux, a second fuel, smoke dust and industrial water to obtain a mixed material; feeding the silver-rich slag into a reduction smelting furnace, blowing second oxygen into the reduction smelting furnace, and adding a first reducing agent and a mixed material to carry out reduction smelting on the silver-rich slag to obtain a second part of lead-silver alloy, reduction slag and second smoke; preferably, in the reduction smelting step, nitrogen gas and demineralized water are simultaneously injected into the reduction smelting furnace.
Further, the second reducing agent is one or more of pulverized coal, natural gas and crushed coal; preferably, the second reducing agent is used in an amount of 15 to 25% by weight of the reducing slag, and the temperature during fuming reduction is 1150 to 1250 ℃.
Further, after the step of obtaining the silver-zinc alloy, the smelting method further comprises: and carrying out vacuum dezincification and electrolytic refining on the silver-zinc alloy to obtain a silver product.
Further, the smelting method further comprises the following steps: sequentially carrying out waste heat recovery and dust removal treatment on the first smoke, the second smoke and the third smoke to obtain a smoke dust collector; acid preparation is carried out on the first flue gas after dust removal to obtain purified flue gas; desulfurizing the second flue gas and the third flue gas after dust removal to obtain purified flue gas; at least a portion of the fume collection is returned to the reduction smelting step as fume that is mixed with the second flux, the second fuel and the process water.
The invention provides a smelting method of low-lead silver concentrate, which comprises a mixing granulating step, an oxidizing smelting step, a reducing smelting step and a fuming reduction step which are sequentially carried out. The invention can economically and effectively treat the low-lead silver concentrate by the oxidation smelting-silver-rich slag direct reduction smelting-reducing slag fuming reduction process of the low-lead silver concentrate, and has the advantages of smooth production process, small slag quantity and higher silver recovery rate.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present invention will be described in detail with reference to examples.
As described in the background art, no production practice for separately treating the low-lead silver concentrate exists at present, and when the low-lead silver concentrate is mixed with the low-lead silver concentrate, the problems of large slag quantity, low silver recovery rate and the like exist. In order to solve the problem, the invention provides a smelting method of low-lead silver concentrate, wherein the silver content in the low-lead silver concentrate is 0.03-1.5 wt% and the lead content is 28-35 wt%, and the smelting method comprises the following steps: and (3) mixing and granulating: mixing and granulating the low-lead silver concentrate with a first fuel and a first flux to form mixed granules; oxidizing and smelting: putting the mixed granules into a bottom-blowing smelting furnace, blowing first oxygen into the bottom-blowing smelting furnace through a bottom-blowing spray gun to oxidize and smelt the mixed granules, and supplementing lead into the bottom-blowing smelting furnace in the oxidation smelting process to obtain a first part of lead-silver alloy, silver-rich slag and first flue gas; wherein the lead material is first desilvered lead and/or regenerated lead; a reduction smelting step: feeding the silver-rich slag into a reduction smelting furnace, blowing second oxygen into the reduction smelting furnace, and adding a first reducing agent, a second flux and a second fuel to carry out reduction smelting on the silver-rich slag to obtain a second part of lead-silver alloy, reduction slag and second flue gas; and (3) fuming reduction: and carrying out fuming reduction on the reducing slag under the action of a second reducing agent and process air to obtain fuming slag and third flue gas.
In the smelting method, the low-lead silver concentrate, the first fuel and the first flux are mixed and granulated, so that the full reaction of materials in the subsequent oxidation smelting process is facilitated, and the reaction uniformity is improved. The first flux is beneficial to reducing the melting point of low-lead silver concentrate in the smelting process, controlling slag and promoting the output of lead silver alloy in the oxidation smelting process. In the oxidation smelting process, oxygen is blown into a bottom blowing smelting furnace through a bottom blowing spray gun so as to convert part of lead and silver in the low-lead silver concentrate from a sulfuration state to an oxidation state, and further reaction between the generated lead and silver sulfide and the lead and silver sulfide is promoted to produce a first part of lead and silver alloy. It is emphasized that during this process, the smelting system is fed with desilvered lead and/or recycled lead, on the one hand, silver can be more effectively captured during the oxidation smelting step, and the lead bullion reduced during the reduction smelting step can capture silver again. The recovery rate of silver is improved by two-stage trapping. On the other hand, silver is fully trapped in the oxidation smelting stage, the problem that the content of scum is increased easily caused by enrichment of silver (and other metal elements contained in mineral aggregate such as copper) in the crude lead of the reduction smelting furnace is avoided, the problem that the system operation rate is influenced by blockage of a siphon port of the reduction smelting furnace is avoided, the treatment capacity of a production line is ensured, and the economic benefit is improved. In addition, the introduction of desilvered lead and regenerated lead can also effectively reduce the slag quantity. After the oxidation bottom blowing smelting, the produced silver-rich slag enters a reduction smelting furnace, and is further subjected to reduction smelting under the action of a first reducing agent, a second flux and a second fuel, wherein the oxidized lead silver can be further reduced to produce a second part of lead silver alloy. Finally, the reducing slag is further reduced by fuming, so that the residual valuable metals (silver, lead, zinc and the like) in the reducing slag can be reduced, and volatilized into smoke dust for subsequent collection.
In a word, by using the smelting method of the low-lead silver concentrate provided by the invention, the low-lead silver concentrate can be economically and effectively treated by the oxidation smelting-silver-rich slag direct reduction smelting-reducing slag fuming reduction process of the low-lead silver concentrate, the production process is smooth, the slag quantity is small, and the recovery rate of silver is higher.
In the above treatment, the silver content of the silver-rich slag obtained is usually 0.05 to 1.8wt%.
In a preferred embodiment, the above smelting method further comprises the steps of: and mixing the first part of lead-silver alloy and the second part of lead-silver alloy, and then adding zinc to remove silver to obtain silver-zinc alloy (the silver content is 10-12 wt%) and liquid second desilverized lead. The lead and silver in the lead-silver alloy can be separated by adding zinc to remove silver, so that a silver-zinc alloy and a second desilvered lead are generated. The above-mentioned fed lead material can be solid lead or liquid lead, for example, can be directly fed with regenerated lead, such as solid lead and/or lead grid, etc., and can be directly fed into bottom-blowing smelting furnace by means of charging inlet. More preferably, at least a part of the liquid second desilvered lead is used as the first desilvered lead. So that at least part of the liquid second desilvered lead can be directly returned to the oxidation smelting step to be used as the fed lead material. Thus, the trapping of silver in the oxidation smelting and reduction smelting processes can be promoted, the silver recovery rate is improved, and the raw material cost and the energy consumption are saved. In the specific feeding process, a pump can be directly adopted to pump the liquid desilvered lead into the bottom blowing smelting furnace.
In the bottom blowing smelting process, part of lead sulfide and silver sulfide in the mineral aggregate can be oxidized into lead oxide and silver oxide, the generated lead oxide and silver oxide can further react with the rest of lead sulfide and silver sulfide to generate lead and silver, and the generated silver simple substance can be fully trapped in lead through the fed lead aggregate, so that a first part of lead-silver alloy is produced. Preferably, in the oxidation smelting step, the addition amount of the lead material is 25-35% of the weight of the low-lead silver concentrate, and the smelting temperature is 1080-1150 ℃. The supplementing amount of the lead material is controlled within the range, so that silver can be more effectively captured, the recovery rate of silver is improved, and waste of lead is avoided. By controlling the smelting process conditions within the above-described range, oxidation smelting can be promoted to proceed more sufficiently.
More preferably, the blowing amount of the first oxygen per ton of the mixed pellets is 80-120 Nm 3 And/h. The oxygen injection quantity is controlled within the range, so that on one hand, transitional oxidation is avoided, and the recovery of the lead-silver alloy in the first stage is ensured; on the other hand, the problem of excessive scum caused by insufficient oxidation can be avoided, and the recovery of lead and silver is also facilitated. In order to protect the bottom-blowing lance during actual production, it is more preferable to simultaneously blow nitrogen and demineralized water into the bottom-blowing smelting furnace during the blowing of the first oxygen. In the specific blowing process, nitrogen and desalted water can be respectively sprayed into the same spray gun through different channels. In practice, oxygen, nitrogen and desalted water are preferably injected into the furnace through different channels of the same spray gun.
The first fuel and the first flux may be selected from the common types in the art, such as, for example, the first fuel including, but not limited to, one or more of crushed coal, coke, lump coal; the first flux includes, but is not limited to, one or more of limestone, quartz stone, pyrite. Preferably, in the mixing granulation step, the amount of the first fuel is 0.5 to 1.5% by weight of the low-lead silver concentrate, and the amount of the first flux is 2 to 6% by weight of the low-lead silver concentrate. The amount of each raw material is controlled within the above range, which is favorable for more fully carrying out the oxidation smelting reaction. In addition, in order to make the pelletization process more stable and environment-friendly, in a preferred embodiment, industrial water is added to mix and pelletize the low-lead silver concentrate, the first fuel and the first flux. The specific industrial water addition amount can be adjusted, and the granulation can be carried out. Preferably, the particle size of the mixed pellets is controlled to be 1 to 2.5 cm.
The specific types of first reductant and second fuel described above may be of the type commonly used in the art, and in a more preferred embodiment, the first reductant includes, but is not limited to, one or more of pulverized coal, lump coal (20-30 mm), natural gas, coke; the second flux includes, but is not limited to, limestone; the secondary fuel includes, but is not limited to, one or more of pulverized coal, crushed coal.
In order to fully reduce the silver oxide and lead oxide in the silver-rich slag, the amount of the first reducing agent is preferably 4-8% of the weight of the silver-rich slag; the dosage of the second flux is 3-6% of the weight of the silver-rich slag; the dosage of the second fuel is 0.5-5% of the weight of the silver-rich slag. In the actual production process, the silver-rich slag in a liquid state produced in the oxidation smelting step is preferably directly put into a reduction smelting furnace for reduction smelting.
In a preferred embodiment, in the reduction smelting step, the injection amount of the second oxygen corresponding to each ton of silver-rich slag is 30-80 Nm 3 And/h, wherein the smelting temperature is 1150-1250 ℃. Under the process conditions, lead oxide and silver oxide in the silver-rich slag can be promoted to be reduced into simple substances more fully, and the secondary trapping of lead to silver is more sufficient, so that the method has better promotion effect on improving the recovery rate of lead and silver.
The specific feeding mode in the reduction smelting process is not limited, for example, gaseous materials and powder materials are sprayed through a side-blowing or bottom-blowing spray gun, and the rest materials are added through a feeding hole. In a preferred embodiment, the reduction smelting step includes: mixing the second flux, the second fuel, the smoke dust and the industrial water to obtain a mixed material; and sending the silver-rich slag into a reduction smelting furnace, blowing second oxygen into the reduction smelting furnace, and adding the first reducing agent and the mixed material to carry out reduction smelting on the silver-rich slag to obtain a second part of lead-silver alloy, reduction slag and second smoke. When the first reductant is selected from pulverized coal, natural gas, etc., it is preferably injected through a lance. When the first reducing agent is selected from the group consisting of lump coal, coke, and the like, it is preferable that the first reducing agent is mixed with the second flux, the second fuel, and industrial water to obtain a mixed material, and then the mixed material is charged into the reduction smelting furnace. The lance in the reduction smelting process may be a bottom-blowing lance or a side-blowing lance. Preferably, in the reduction smelting step, nitrogen and demineralized water are simultaneously injected into the reduction smelting furnace for protecting the lance.
The type of the second reducing agent may be of a type commonly used in the art, for example, the second reducing agent includes, but is not limited to, one or more of pulverized coal, natural gas, crushed coal; preferably, the second reducing agent is used in an amount of 15 to 25% by weight of the reducing slag, and the temperature during fuming reduction is 1150 to 1250 ℃. Under the process conditions, valuable metals in the reducing slag can be fully reduced and volatilized, and the recovery of the valuable metals is improved. The obtained fuming slag can be sent to a water quenching system for treatment so as to carry out slag granulation operation.
And after the first lead-silver alloy produced in the oxidation smelting step and the second lead-silver alloy produced in the reduction smelting step are mixed, the lead and the silver can be separated by adding zinc to remove silver, so that the silver-zinc alloy and the second desilvered lead are obtained. The specific zinc adding and silver removing process preferably comprises the following steps: the separation of lead and silver is achieved by mixing the lead and silver alloy, then fire refining (during which a portion of the zinc is replenished), and then zinc addition and silver removal, such as: zinc is added into a lead-silver alloy melt in the form of a metal zinc block, the temperature of the melt is 420-455 ℃, the lead smelting is sampled after the zinc block is added, when the silver content is reduced to 10-20 g/t, the silver-zinc alloy floating on the surface of the lead liquid is fished out, and the added zinc amount can be calculated according to the silver content of crude lead, which is understood by those skilled in the art and is not repeated. More preferably, the silver-zinc alloy is refined to obtain metallic silver. Preferably, 5 to 100 percent of the second desilvered lead is returned as lead material to be fed into the oxidation smelting stage, and the rest of the second desilvered lead is taken as lead product. Preferably, after the step of obtaining the silver-zinc alloy, the smelting method further includes: and carrying out vacuum dezincification and electrolytic refining on the silver-zinc alloy to obtain a silver product. The vacuum dezincification and electrorefining may be performed by techniques known in the art and will not be described in detail herein.
In a preferred embodiment, the above smelting method further comprises: mixing the first flue gas, the second flue gas and the third flue gas, and then sending the mixed flue gas into a waste heat recovery system and a dust removal system to obtain dust removal flue gas; acid preparation is carried out on the first flue gas after dust removal to obtain purified flue gas; desulfurizing the second flue gas and the third flue gas after dust removal to obtain purified flue gas; at least part of the smoke dust is returned to the reduction smelting step and mixed with the second flux, the second fuel and the industrial water to obtain a mixed material.
In summary, the smelting method provided by the invention has the following beneficial effects:
1. the low-lead silver concentrate is directly treated by the oxidation smelting-silver-rich slag reduction smelting-fuming reduction process, and the slag amount in the production process is small, and the operation is smooth.
2. The low-lead silver concentrate is treated by an oxygen bottom blowing furnace, the silver content of the low-lead silver concentrate is 0.03-1.5%, and the lead content is 28-35%.
3. The yield of the lead-silver alloy in the smelting process can be improved through the silver-removing lead return, the recovery rate of silver is improved, the silver content in silver-rich slag is reduced, and part of copper is recovered in the lead-silver alloy. The silver and copper content in the lead-silver alloy produced by the reduction of the silver-rich slag is reduced, and the phenomenon that the production is influenced by siphon bonding due to the fact that the crude lead contains too high silver and copper is avoided.
4. The silver-rich slag (containing 0.05 to 1.8 percent of silver) is directly reduced in the reduction smelting process, so that the reduction effect can be enhanced, and the silver recovery rate is further improved.
The present application is described in further detail below in conjunction with specific embodiments, which should not be construed as limiting the scope of the claims.
Example 1
The low-lead silver concentrate containing 35% of lead and 0.8% of silver is used as a raw material, and an oxidation smelting-silver-rich slag bottom blowing reduction-reducing slag fuming process is adopted, and the specific operation is as follows:
mixing low-lead silver concentrate, coke and limestone, adding industrial water, granulating to form mixed granules with the particle size of 1-2.5 cm; wherein the consumption of coke is 1.5% of the weight of the low-lead silver concentrate, and the consumption of limestone is 2% of the weight of the low-lead silver concentrate;
the mixed granules are put into a bottom blowing smelting furnace for oxidation smelting according to the feeding amount of 20t per hour, oxygen is blown into the bottom blowing smelting furnace through a bottom blowing spray gun (nitrogen and desalted water are simultaneously blown in), and the blowing amount is controlled to be 105Nm of oxygen blown into each ton of mixed granules 3 And continuously supplementing lead material (silver-removing lead liquid from the subsequent step, wherein the adding amount of the silver-removing lead liquid is 35 percent of the weight of the low-lead silver concentrate) into the bottom blowing smelting furnace in the oxidation smelting process. The temperature in the oxidation smelting process is 1150 ℃, and 6t of lead-silver alloy with silver content of 1.44% is produced per hour. And silver-rich slag and flue gas are produced, wherein the silver-rich slag contains 0.58% of silver.
Mixing the silver-rich slag with pulverized coal, limestone and industrial water to form a mixed material, sending the mixed material into a reduction smelting furnace for reduction smelting, and injecting oxygen (simultaneously injecting nitrogen and desalted water) into the mixed material, wherein the injection amount of oxygen corresponding to each ton of silver-rich slag is controlled to be 30Nm 3 And (3) the consumption of the pulverized coal is 8 percent of the weight of the silver-rich slag (6 percent of the silver-rich slag is reducing agent and 2 percent of the silver-rich slag is fuel). The smelting temperature in the reduction smelting process is 1250 ℃, and the reduction furnace produces 7.75 tons of lead-silver alloy per hour, and the silver content of the lead-silver alloy is 0.94%. In addition, reducing slag and flue gas are produced. The total silver recovery during both the oxidation and reduction smelting processes was 99.36%.
And mixing the lead-silver alloy produced in the two steps, adding zinc for silver removal, performing fire refining on the crude lead to obtain liquid desilvered lead, adding zinc for silver removal to realize lead-silver separation, obtaining silver-zinc alloy (silver content is 12%), and refining the silver-zinc alloy to obtain metallic silver. And returning a part of the desilvered lead as lead material to be added into the oxidation smelting step. And (3) carrying out electrolytic refining on the metallic silver to form a silver product.
And sending the flue gas obtained in the two steps into a waste heat recovery system and a dust removal system to obtain dust removal flue gas and smoke dust. And returning part of the smoke dust to the reduction smelting step, mixing the smoke dust with raw materials such as silver-rich slag and the like, and carrying out reduction smelting.
Example 2
The low-lead silver concentrate containing 28% of lead and 0.5% of silver is used as a raw material, and an oxidation smelting-silver-zinc alloy bottom blowing reduction-reduction slag fuming process is adopted, and the specific operation is as follows:
mixing low-lead silver concentrate, coke and limestone, adding industrial water, granulating to form mixed granules with the particle size of 1-2.5 cm; wherein the consumption of coke is 0.5% of the weight of the low-lead silver concentrate, and the consumption of limestone is 6% of the weight of the low-lead silver concentrate;
the mixed granules are put into a bottom blowing smelting furnace for oxidation smelting according to the feeding amount of 20t per hour, oxygen is blown into the bottom blowing smelting furnace through a bottom blowing spray gun (nitrogen and desalted water are simultaneously blown in), and the blowing amount is controlled to be 120Nm of oxygen blown into each ton of mixed granules 3 And continuously supplementing lead material (silver-removing lead liquid from the subsequent step, which is added in an amount of 25% of the weight of the low-lead silver concentrate) into the bottom-blowing smelting furnace in the oxidation smelting process. The temperature in the oxidation smelting process is 1080 ℃, and 5.8t of lead-silver alloy with silver content of 1.01% is produced per hour. And silver-rich slag and flue gas are produced, wherein the silver-rich slag contains 0.33% of silver.
Mixing the silver-rich slag with pulverized coal, limestone and industrial water to form a mixed material, sending the mixed material into a reduction smelting furnace for reduction smelting, and injecting oxygen (simultaneously injecting nitrogen and desalted water) into the mixed material, wherein the injection amount of the oxygen corresponding to each ton of silver-rich slag is controlled to be 80Nm 3 And (3) the consumption of the pulverized coal is 5% of the weight of the silver-rich slag (4% of the silver-rich slag is reducing agent and 1% of the silver-rich slag is fuel). The smelting temperature in the reduction smelting process is 1150 ℃, and the reduction furnace produces 6.6 tons of lead-silver alloy per hour, and the silver content of the lead-silver alloy is 0.62%. In addition, reducing slag and flue gas are produced. The total silver recovery during both oxidation and reduction smelting was 99.40%.
And mixing the lead-silver alloy produced in the two steps, adding zinc to remove silver and lead for refining, performing fire refining on crude lead to obtain liquid silver-removed lead, adding zinc to remove silver to realize lead-silver separation, obtaining silver-zinc alloy (silver content is 11%), and refining the silver-zinc alloy to obtain metallic silver. And returning a part of the desilvered lead as lead material to be added into the oxidation smelting step. And (3) carrying out electrolytic refining on the metallic silver to form a silver product.
And sending the flue gas obtained in the two steps into a waste heat recovery system and a dust removal system to obtain dust removal flue gas and smoke dust. And returning part of the smoke dust to the reduction smelting step, mixing the smoke dust with raw materials such as silver-rich slag and the like, and carrying out reduction smelting.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (16)
1. The smelting method of the low-lead silver concentrate, wherein the silver content in the low-lead silver concentrate is 0.03-1.5wt% and the lead content is 28-35 wt%, is characterized by comprising the following steps:
and (3) mixing and granulating: mixing and granulating the low-lead silver concentrate with a first fuel and a first flux to form mixed granules;
oxidizing and smelting: putting the mixed granules into a bottom-blowing smelting furnace, blowing first oxygen into the bottom-blowing smelting furnace through a bottom-blowing spray gun to enable the mixed granules to be subjected to oxidation smelting, and supplementing lead materials into the bottom-blowing smelting furnace in the oxidation smelting process to obtain a first part of lead-silver alloy, silver-rich slag and first flue gas; wherein the lead material is first desilvered lead;
a reduction smelting step: feeding the silver-rich slag into a reduction smelting furnace, blowing second oxygen into the reduction smelting furnace, and adding a first reducing agent, a second flux and a second fuel to perform reduction smelting on the silver-rich slag to obtain a second part of lead-silver alloy, reduction slag and second flue gas;
and (3) fuming reduction: carrying out fuming reduction on the reducing slag under the action of a second reducing agent and process air to obtain fuming slag and third flue gas;
in the oxidation smelting step, the addition amount of the lead material is 25-35% of the weight of the low-lead silver concentrate;
the smelting method further comprises the following steps: mixing the first part of lead-silver alloy and the second part of lead-silver alloy, and then adding zinc to remove silver to obtain silver-zinc alloy and liquid second desilvered lead; and taking at least part of the liquid second desilvering lead as the first desilvering lead.
2. The smelting method of low-lead silver concentrate according to claim 1, wherein in the oxidizing smelting step, the smelting temperature is 1080-1150 ℃.
3. The smelting method of low-lead silver concentrate according to claim 2, wherein the injection amount of the first oxygen gas corresponding to each ton of the mixed granules is 80-120 Nm 3 /h。
4. The method for smelting low-lead silver concentrate according to claim 2, wherein nitrogen and demineralized water are simultaneously injected into the bottom-blowing smelting furnace during the injection of the first oxygen gas.
5. The method for smelting low-lead silver concentrate according to claim 2, wherein the first fuel is one or more of crushed coal, coke, lump coal; the first flux is one or more of limestone, quartz stone and pyrite.
6. The method for smelting low-lead silver concentrate according to claim 5, wherein in the step of mixing and granulating, the amount of the first fuel is 0.5-1.5% of the weight of the low-lead silver concentrate, and the amount of the first flux is 2-6% of the weight of the low-lead silver concentrate.
7. The method for smelting low-lead silver concentrate according to claim 5, wherein industrial water is added to perform the mixed granulation of the low-lead silver concentrate, the first fuel and the first flux.
8. The smelting process for low lead silver concentrate according to any one of claims 1 to 7, wherein the first reducing agent is one or more of pulverized coal, lump coal, natural gas, coke; the second flux is limestone; the second fuel is one or more of pulverized coal and crushed coal.
9. The smelting method of low-lead silver concentrate according to claim 8, wherein the amount of the first reducing agent is 4-8% of the weight of the silver-rich slag; the dosage of the second flux is 3-6% of the weight of the silver-rich slag; the dosage of the second fuel is 0.5-5% of the weight of the silver-rich slag.
10. The method for smelting low-lead silver concentrate according to claim 8, wherein in the reduction smelting step, the injection amount of the second oxygen gas corresponding to each ton of the silver-rich slag is 30-80 nm 3 And/h, wherein the smelting temperature is 1150-1250 ℃.
11. The smelting method of low lead silver concentrate according to claim 8, wherein the reducing smelting step includes:
mixing the second flux, the second fuel, smoke dust and industrial water to obtain a mixed material;
and sending the silver-rich slag into a reduction smelting furnace, blowing the second oxygen into the reduction smelting furnace, and throwing the first reducing agent and the mixed material to perform reduction smelting on the silver-rich slag to obtain the second part of lead-silver alloy, the reduction slag and the second flue gas.
12. The method for smelting low-lead silver concentrate according to claim 11, wherein nitrogen gas and demineralized water are simultaneously injected into the reduction smelting furnace in the reduction smelting step.
13. The method for smelting low-lead silver concentrate according to claim 11, wherein the second reducing agent is one or more of pulverized coal, natural gas, crushed coal.
14. The method for smelting low-lead silver concentrate according to claim 13, wherein the amount of the second reducing agent is 15-25% of the weight of the reducing slag, and the temperature in the fuming reduction process is 1150-1250 ℃.
15. The method of smelting low lead silver concentrate according to claim 1, wherein after the step of obtaining the silver zinc alloy, the smelting method further comprises: and carrying out vacuum dezincification and electrolytic refining on the silver-zinc alloy to obtain a silver product.
16. The method for smelting low-lead silver concentrate according to claim 11, further comprising:
sequentially carrying out waste heat recovery and dust removal treatment on the first smoke, the second smoke and the third smoke to obtain a smoke dust collector;
acid making is carried out on the first flue gas after dust removal to obtain purified flue gas;
desulfurizing the second flue gas and the third flue gas after dust removal to obtain purified flue gas;
at least a portion of the fume collection is returned to the reduction smelting step as the fume mixed with the second flux, the second fuel, and industrial water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210622335.1A CN114959293B (en) | 2022-06-02 | 2022-06-02 | Smelting method of low-lead silver concentrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210622335.1A CN114959293B (en) | 2022-06-02 | 2022-06-02 | Smelting method of low-lead silver concentrate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114959293A CN114959293A (en) | 2022-08-30 |
| CN114959293B true CN114959293B (en) | 2024-02-27 |
Family
ID=82959095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210622335.1A Active CN114959293B (en) | 2022-06-02 | 2022-06-02 | Smelting method of low-lead silver concentrate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114959293B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115927870A (en) * | 2022-11-21 | 2023-04-07 | 中国恩菲工程技术有限公司 | Reduction lead smelting method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003293049A (en) * | 2002-04-08 | 2003-10-15 | Mitsubishi Materials Corp | Method for recovering silver from slag containing silver and lead |
| CN103361491A (en) * | 2013-07-18 | 2013-10-23 | 湖南华信有色金属有限公司 | Liquid-state high-lead slag side-blowing water-gas reduction process |
| CN103451445A (en) * | 2013-09-10 | 2013-12-18 | 中国恩菲工程技术有限公司 | Smelting side-blowing reduction lead-zinc smelting process |
| CN103993176A (en) * | 2014-05-13 | 2014-08-20 | 中国恩菲工程技术有限公司 | Rich-oxygen top-blown smelting/liquid high-lead slag side-blown direct-reduction lead smelting process |
| CN105950869A (en) * | 2016-06-16 | 2016-09-21 | 汉中锌业有限责任公司 | Method for increasing matching amount of lead-silver residue of zinc hydrometallurgy in efficient resource utilization |
| CN107326190A (en) * | 2017-05-23 | 2017-11-07 | 西北矿冶研究院 | Resource utilization method of lead-zinc-silver-containing smelting slag |
| CN110453079A (en) * | 2019-09-11 | 2019-11-15 | 兰州理工大学 | A method for efficiently recovering silver in lead-silver slag by melting-fuming method |
-
2022
- 2022-06-02 CN CN202210622335.1A patent/CN114959293B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003293049A (en) * | 2002-04-08 | 2003-10-15 | Mitsubishi Materials Corp | Method for recovering silver from slag containing silver and lead |
| CN103361491A (en) * | 2013-07-18 | 2013-10-23 | 湖南华信有色金属有限公司 | Liquid-state high-lead slag side-blowing water-gas reduction process |
| CN103451445A (en) * | 2013-09-10 | 2013-12-18 | 中国恩菲工程技术有限公司 | Smelting side-blowing reduction lead-zinc smelting process |
| CN103993176A (en) * | 2014-05-13 | 2014-08-20 | 中国恩菲工程技术有限公司 | Rich-oxygen top-blown smelting/liquid high-lead slag side-blown direct-reduction lead smelting process |
| CN105950869A (en) * | 2016-06-16 | 2016-09-21 | 汉中锌业有限责任公司 | Method for increasing matching amount of lead-silver residue of zinc hydrometallurgy in efficient resource utilization |
| CN107326190A (en) * | 2017-05-23 | 2017-11-07 | 西北矿冶研究院 | Resource utilization method of lead-zinc-silver-containing smelting slag |
| CN110453079A (en) * | 2019-09-11 | 2019-11-15 | 兰州理工大学 | A method for efficiently recovering silver in lead-silver slag by melting-fuming method |
Non-Patent Citations (1)
| Title |
|---|
| 方钊等.常用有色金属冶炼方法概论.冶金工业出版社,2016,34-35. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114959293A (en) | 2022-08-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106399692B (en) | A kind of concentration smelting method that cupric solid wastes recycling utilizes | |
| US8771396B2 (en) | Method for producing blister copper directly from copper concentrate | |
| CN103667712B (en) | A kind of method of the leaded and synchronous bath smelting of copper-bearing waste material | |
| CN104313328B (en) | Method for recovering lead and gold based on refractory gold ore and lead-containing waste slag raw materials reduction and solidification molten pool smelting | |
| CN111733325B (en) | Method for comprehensively recovering valuable metals from copper-based solid waste | |
| CN101845554A (en) | Method for melting copper by using waste copper and concentrate of copper sulfide as raw materials | |
| CN106086413B (en) | A kind of technique of zinc hydrometallurgy lead smelting gas recycling | |
| CN108359814B (en) | Antimony sulfide gold ore oxygen-enriched molten pool smelting method | |
| CN111088433A (en) | Method for enriching and recovering thallium from lead smelting system | |
| CN111893310A (en) | Harmless recycling treatment method for solid hazardous waste | |
| CN105950869A (en) | Method for increasing matching amount of lead-silver residue of zinc hydrometallurgy in efficient resource utilization | |
| CN109055765A (en) | A method of recycling refined bismuth from precious metals containing lead | |
| CN110777264A (en) | Method suitable for independent smelting of various complex gold concentrates | |
| CN114959293B (en) | Smelting method of low-lead silver concentrate | |
| CN109487086A (en) | Smelting non-ferrous metal and/or ore dressing tailings resource utilization recyclable device and method | |
| CN113817924B (en) | Method for producing blister copper by smelting copper dross and smelting device thereof | |
| CN111575500A (en) | Method for treating zinc-containing dangerous solid waste and zinc ore by combining chlorination roasting with ammonia process electrodeposition | |
| CN112981136B (en) | One-step zinc smelting method for spraying zinc concentrate in molten pool | |
| CN104388980A (en) | Method for extracting gold from difficultly treated gold ore | |
| CN104831086B (en) | A kind of method that smelting charge of lead and zinc sinters melting | |
| CN112143908B (en) | Smelting process for treating complex gold ore | |
| CN102864313B (en) | Smelting method of natural copper mine | |
| CN113737014B (en) | Comprehensive treatment method for gold concentrate and secondary copper resource | |
| CN113528852A (en) | Production method for dearsenifying and deleading high-arsenic lead copper matte | |
| CN111270078A (en) | Method for recovering valuable metals in nickel slag |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |