CN1420186A - A New Process for Separating Zinc and Lead from Metallurgical Furnace Dust - Google Patents
A New Process for Separating Zinc and Lead from Metallurgical Furnace Dust Download PDFInfo
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- CN1420186A CN1420186A CN01131555A CN01131555A CN1420186A CN 1420186 A CN1420186 A CN 1420186A CN 01131555 A CN01131555 A CN 01131555A CN 01131555 A CN01131555 A CN 01131555A CN 1420186 A CN1420186 A CN 1420186A
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- Prior art keywords
- zinc
- lead
- molten aluminum
- dust
- furnace
- Prior art date
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- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 83
- 239000011701 zinc Substances 0.000 title claims abstract description 83
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 43
- 239000000428 dust Substances 0.000 title claims abstract description 37
- 229910000464 lead oxide Inorganic materials 0.000 claims abstract description 12
- 229910052751 metal Inorganic materials 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 12
- 238000002844 melting Methods 0.000 claims abstract description 3
- 230000008018 melting Effects 0.000 claims abstract description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 57
- 229910052782 aluminium Inorganic materials 0.000 claims description 57
- 239000002893 slag Substances 0.000 claims description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 238000009833 condensation Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 3
- 230000002829 reductive effect Effects 0.000 claims description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract 1
- 238000005272 metallurgy Methods 0.000 abstract 1
- 239000011707 mineral Substances 0.000 abstract 1
- 238000004904 shortening Methods 0.000 abstract 1
- 239000011133 lead Substances 0.000 description 29
- 239000004411 aluminium Substances 0.000 description 28
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 26
- 239000003517 fume Substances 0.000 description 14
- 239000011787 zinc oxide Substances 0.000 description 13
- 238000001816 cooling Methods 0.000 description 12
- 239000000126 substance Substances 0.000 description 8
- 238000009825 accumulation Methods 0.000 description 7
- 238000001704 evaporation Methods 0.000 description 7
- 230000008020 evaporation Effects 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 230000006698 induction Effects 0.000 description 6
- HTUMBQDCCIXGCV-UHFFFAOYSA-N lead oxide Chemical compound [O-2].[Pb+2] HTUMBQDCCIXGCV-UHFFFAOYSA-N 0.000 description 6
- YEXPOXQUZXUXJW-UHFFFAOYSA-N lead(II) oxide Inorganic materials [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 6
- 239000000155 melt Substances 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 230000001590 oxidative effect Effects 0.000 description 6
- 230000001698 pyrogenic effect Effects 0.000 description 6
- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000006722 reduction reaction Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- 235000012216 bentonite Nutrition 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 235000020357 syrup Nutrition 0.000 description 1
- 239000006188 syrup Substances 0.000 description 1
- 238000009858 zinc metallurgy Methods 0.000 description 1
Images
Classifications
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- 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
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a new process for separating zinc and lead in metallurgical furnace dust by adopting a melting reduction method, which belongs to the field of non-ferrous metal metallurgy, has the characteristics of respectively recovering zinc and lead in the metallurgical furnace dust at one time, shortening the treatment process, saving energy and the like, and can widely treat various furnace dust and minerals containing zinc and lead oxides.
Description
One, technical field: the present invention relates to a kind of smelting process of non-ferrous metal, particularly a kind of novel process of separating zinc lead in the metallurgic furnace dust.
Two, background technology: at present, the treatment process of metallurgical zincy lead dust (comprising stove dirt) is many, can reduce following a few class but integrate: the one, and as returning mine, recirculation minimizes the dust volume, and the maximization of zinc content is handled or is sold; The 2nd, stabilization treatment comprises that chemical fixation and vitrifying (or semi-molten) handle, and can sell behind the dust disposal, and is also stackable and dispose in landfill factory; The 3rd, the hydrometallurgic recovery method adopts acid, alkali or salts solution to remove or heavy metals such as separation and Extraction zinc, lead; The 4th, the pyrogenic process absorption method adopts special disposal device pyrogenic process to reclaim useful metals such as iron, zinc and lead; The 5th, pyrogenic process/wet method combined absorption method carries out pyrogenic process or wet processing earlier to dust, improves the grade that will reclaim metal, removes unwanted material, carries out wet method or pyrogenic process again and refines, and obtains high-quality product.Above-mentioned all kinds of technology, the industrialization of realization, the commercialization that have, what have still is in half industrialization, and what have has a development potentiality very much, and losing of having handled market or has been eliminated.And in all these recovery and treatment methods, pyrogenic attack technology is comparatively ripe, and wherein most representative technology is Waelz rotary kiln treatment process and INMETCO ring furnace class treatment process.But there is common issue with in these thermal process: the product after (), the processing is secondary dust (ZnO content 30～70%) and the iron slag that contains zinc, lead oxides mostly, or metallic zinc, lead and molten iron; (2), mainly be main purpose with the iron that reclaims in the dust, the secondary dust is as zinc metallurgy or the plumbous raw material of refining; (3), the zinc after handling effectively do not separated with lead, utilize the zinc lead resource, must handle the secondary dust again, makes zinc and plumbous the separation, this has just increased treatment process and cost greatly.In the last few years, a kind of method of iron-bath molten reduction had appearred, the reduction reaction temperature height of this method (more than the iron melting temperature), and speed of response is fast, but because the temperature of reaction height, zinc wherein and lead will volatilize jointly, do not reach isolating effect.
Three, summary of the invention: technical problem to be solved by this invention provides a kind of under suitable temperature, and disposable zinc and the lead that reclaims respectively in the metallurgic furnace dust of energy shortens treatment process, the novel process of the separation of Zinc lead of save energy.
The technical solution used in the present invention is:
Its technological process is:
Metallic aluminium in a, the fusing burner hearth forms bath of molten aluminum, and temperature is controlled in 900～1200 ℃, as heating carrier;
B, the metallurgic furnace dust of zincy lead is shaped, joins after the drying in the stove in the bath of molten aluminum, make its fusing fast in bath of molten aluminum, its contained zinc, lead oxides fast restore are metallic zinc, lead; Metallic zinc is with the form volatilization of zinc fume, and the method for employing condensation reclaims; Plumbous then stay in the slag with the form of metallic lead, reclaim with rich galvanized iron slag form.
The temperature of bath of molten aluminum is controlled between 1050～1150 ℃.
The temperature of bath of molten aluminum is controlled at 1100 ℃.
30～60 minutes reduction reaction time was the best with 45 minutes especially.
The add-on of aluminium is 20%～50% of a furnace refractory weight.
During shaping, add the binding agent that accounts for metallurgic furnace dust weight 0.5%～1%, granularity is 5～20mm, toasts 1～4 hour under 100～200 ℃ of temperature.
The novel process of zinc lead in the parting furnace dirt of the present invention, be to adopt aluminium to bathe the method smelting reduction process, because aluminium fusing point low (660 ℃), dust fusing point are also lower, so can be chosen under the lower temperature, both having made zinc, lead oxides fast restore in the dust is metallic zinc and lead, allows zinc be reclaimed with the method for zinc fume volatilization and employing condensation; Make that again metallic lead is non-volatile, allow it stay in the slag, reclaimed with the form of leaded rich slag, thereby reached disposable zinc and the lead of reclaiming respectively, shorten the purpose of treatment process.Simultaneously, because dust itself contains part carbon, so do not need to add in addition reductive agent, aluminium is only as the medium and the carrier of thermostatically heating in addition, and the proportion of aluminium and leaded rich slag differs bigger, leaded rich slag is more or less freely with separating of aluminium, and aluminium can be reused, and the consumption of aluminium is little, and, also can use aluminium scrap, thereby its energy consumption is less.
Four, description of drawings:
Fig. 1 is a process flow sheet of the present invention.
Five, embodiment:
Embodiments of the invention all adopt manganese ore blast furnace dust and dirt mud, and its Chemical Composition is: Zn--20.5, Pb--8.78, Fe--8.0, SiO
2--13.5, CaO--1.4, Al
2O
3--20.5, MgO--13.5, C--8.0, R
4--0.44[R
4Be quaternary basicity, i.e. (CaO+MgO)/(SiO
2+ Al
2O
3), be natural alkalinity], during shaping, add 0.5% tackiness agent (available industrial metasilicate or bentonite or slaked lime or syrup), make the furnace charge of 5～10mm, insert behind the airing in the baking oven and under 120 ℃ of temperature, toasted 3～4 hours, furnace charge.
Embodiment one: aluminium ingot or aluminium scrap are joined in the medium-frequency induction furnace burner hearth, and the add-on of aluminium is 20% of a charging weight, and energising deposite metal aluminium forms bath of molten aluminum, and controlled temperature is at 1200 ℃, as heating carrier; With the furnace charge of making, join in the interior bath of molten aluminum of stove, furnace charge melts in bath of molten aluminum, and its zinc that includes, lead oxides fast restore are metallic zinc, lead; Zinc adopts the method for sealed condensating to reclaim metallic zinc with the form volatilization of zinc fume; Lead is then stayed in the slag, reclaims with leaded rich slag form.Finish after 30 minutes, detect the residue Chemical Composition, zinc accounts for 1.18%, lead accounts for 12.46%, the evaporation rate calculation formula that the evaporation rate of zinc reaches 97.04%{ zinc is: [zinc amount in (in the furnace charge in zinc amount-residue zinc amount) ÷ pelletizing] * 100%}, plumbous accumulation rate [plumbous accumulation rate calculation formula is: (in the residue in the plumbous amount ÷ furnace charge plumbous amount) * 100%] is 73.0%.Under the similarity condition, the sealed condensating operation of zinc fume is changed into: the oxidizing chamber oxidation, form the zinc oxide steam, from chimney, enter atmosphere through cooling tube cooling, bag-type dust, tail gas again, receive dust in, zinc oxide accounts for 87.16%, plumbous oxide accounts for 10.04%.
Embodiment two: aluminium ingot or aluminium scrap are joined in the medium-frequency induction furnace burner hearth, and the add-on of aluminium is 30% of a charging weight, and energising deposite metal aluminium forms bath of molten aluminum, and controlled temperature is at 1150 ℃, as heating carrier; With the furnace charge of making, join in the interior bath of molten aluminum of stove, furnace charge melts in bath of molten aluminum, and its zinc that includes, lead oxides fast restore are metallic zinc, lead; Zinc adopts the method for sealed condensating to reclaim metallic zinc with the form volatilization of zinc fume; Lead is then stayed in the slag, reclaims with leaded rich slag form.Finish after 30 minutes, detect the residue Chemical Composition, zinc accounts for 2.55%, lead accounts for 17.15%, and the evaporation rate of zinc reaches 94.67%, and plumbous accumulation rate is 83.7%.Under the similarity condition, the sealed condensating operation of zinc fume is changed into: the oxidizing chamber oxidation, form the zinc oxide steam, from chimney, enter atmosphere through cooling tube cooling, bag-type dust, tail gas again, receive dust in, zinc oxide accounts for 88.87%, plumbous oxide accounts for 9.10%.
Embodiment three: aluminium ingot or aluminium scrap are joined in the medium-frequency induction furnace burner hearth, and the add-on of aluminium is 40% of a charging weight, and energising deposite metal aluminium forms bath of molten aluminum, and controlled temperature is at 1100 ℃, as heating carrier; With the furnace charge of making, join in the interior bath of molten aluminum of stove, furnace charge melts in bath of molten aluminum, and its zinc that includes, lead oxides fast restore are metallic zinc, lead; Zinc adopts the method for sealed condensating to reclaim metallic zinc with the form volatilization of zinc fume; Lead is then stayed in the slag, reclaims with leaded rich slag form.Finish after 45 minutes, detect the residue Chemical Composition, zinc accounts for 3.53%, lead accounts for 15.29%, and the evaporation rate of zinc reaches 90.53%, and plumbous accumulation rate is 95.78%.Under the similarity condition, the sealed condensating operation of zinc fume is changed into: the oxidizing chamber oxidation, form the zinc oxide steam, from chimney, enter atmosphere through cooling tube cooling, bag-type dust, tail gas again, receive dust in, zinc oxide accounts for 92.52%, plumbous oxide accounts for 4.95%.
Embodiment four: aluminium ingot or aluminium scrap are joined in the medium-frequency induction furnace burner hearth, and the add-on of aluminium is 50% of a charging weight, and energising deposite metal aluminium forms bath of molten aluminum, and controlled temperature is at 1100 ℃, as heating carrier; With the furnace charge of making, join in the interior bath of molten aluminum of stove, furnace charge melts in bath of molten aluminum, and its zinc that includes, lead oxides fast restore are metallic zinc, lead; Zinc adopts the method for sealed condensating to reclaim metallic zinc with the form volatilization of zinc fume; Lead is then stayed in the slag, reclaims with leaded rich slag form.Finish after 45 minutes, detect the residue Chemical Composition, zinc accounts for 2.75%, lead accounts for 13.68%, and the evaporation rate of zinc reaches 92.96%, and plumbous accumulation rate is 81.8%.Under the similarity condition, the sealed condensating operation of zinc fume is changed into: the oxidizing chamber oxidation, form the zinc oxide steam, from chimney, enter atmosphere through cooling tube cooling, bag-type dust, tail gas again, receive dust in, zinc oxide accounts for 91.80%, plumbous oxide accounts for 4.69%.
Embodiment five: aluminium ingot or aluminium scrap are joined in the medium-frequency induction furnace burner hearth, and the add-on of aluminium is 45% of a charging weight, and energising deposite metal aluminium forms bath of molten aluminum, and controlled temperature is at 1050 ℃, as heating carrier; With the furnace charge of making, join in the interior bath of molten aluminum of stove, furnace charge melts in bath of molten aluminum, and its zinc that includes, lead oxides fast restore are metallic zinc, lead; Zinc adopts the method for sealed condensating to reclaim metallic zinc with the form volatilization of zinc fume; Lead is then stayed in the slag, reclaims with leaded rich slag form.Finish after 30 minutes, detect the residue Chemical Composition, zinc accounts for 12.16%, lead accounts for 14.04%, and the evaporation rate of zinc is 57.54%, and plumbous accumulation rate is 96.1%.Under the similarity condition, the sealed condensating operation of zinc fume is changed into: the oxidizing chamber oxidation, form the zinc oxide steam, from chimney, enter atmosphere through cooling tube cooling, bag-type dust, tail gas again, receive dust in, zinc oxide accounts for 91.3%, plumbous oxide accounts for 6.96%.
Embodiment six: aluminium ingot or aluminium scrap are joined in the medium-frequency induction furnace burner hearth, and the add-on of aluminium is 35% of a charging weight, and energising deposite metal aluminium forms bath of molten aluminum, and controlled temperature is at 1050 ℃, as heating carrier; With the furnace charge of making, join in the interior bath of molten aluminum of stove, furnace charge melts in bath of molten aluminum, and its zinc that includes, lead oxides fast restore are metallic zinc, lead; Zinc adopts the method for sealed condensating to reclaim metallic zinc with the form volatilization of zinc fume; Lead is then stayed in the slag, reclaims with leaded rich slag form.Finish after 60 minutes, detect the residue Chemical Composition, zinc accounts for 8.24%, lead accounts for 14.17%, and the evaporation rate of zinc is 74.38%, and plumbous accumulation rate is 94.2%.Under the similarity condition, the sealed condensating operation of zinc fume is changed into: the oxidizing chamber oxidation, form the zinc oxide steam, from chimney, enter atmosphere through cooling tube cooling, bag-type dust, tail gas again, receive dust in, zinc oxide accounts for 90.82%, plumbous oxide accounts for 7.10%.
The present invention not only can handle various stove dirt (comprising stove dirt such as blast furnace and electric furnace), can also handle the various ores that contain zinc, lead oxides.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011315555A CN1219084C (en) | 2001-11-21 | 2001-11-21 | A New Process for Separating Zinc and Lead from Metallurgical Furnace Dust or Minerals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011315555A CN1219084C (en) | 2001-11-21 | 2001-11-21 | A New Process for Separating Zinc and Lead from Metallurgical Furnace Dust or Minerals |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1420186A true CN1420186A (en) | 2003-05-28 |
| CN1219084C CN1219084C (en) | 2005-09-14 |
Family
ID=4670681
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011315555A Expired - Fee Related CN1219084C (en) | 2001-11-21 | 2001-11-21 | A New Process for Separating Zinc and Lead from Metallurgical Furnace Dust or Minerals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1219084C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673646A (en) * | 2013-11-30 | 2014-03-26 | 安徽华鑫铅业集团有限公司金铅分公司 | High-humidity regenerated lead smelting off-gas dehumidifying and dedusting device |
| CN106811602A (en) * | 2017-02-20 | 2017-06-09 | 石家庄学院 | A kind of method that utilization cadmia prepares zinc oxide |
| CN107673399A (en) * | 2017-11-13 | 2018-02-09 | 山东星苑锌业科技有限公司 | A kind of zinc oxide production technology for effectively reducing content of beary metal |
| CN114317965A (en) * | 2022-01-05 | 2022-04-12 | 重庆赛迪热工环保工程技术有限公司 | Process and device for smelting and reducing zinc-containing material by thermite method |
| CN114317964A (en) * | 2022-01-05 | 2022-04-12 | 重庆赛迪热工环保工程技术有限公司 | Process and device for reducing zinc-containing material by vacuum low-temperature aluminothermic process |
-
2001
- 2001-11-21 CN CNB011315555A patent/CN1219084C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673646A (en) * | 2013-11-30 | 2014-03-26 | 安徽华鑫铅业集团有限公司金铅分公司 | High-humidity regenerated lead smelting off-gas dehumidifying and dedusting device |
| CN106811602A (en) * | 2017-02-20 | 2017-06-09 | 石家庄学院 | A kind of method that utilization cadmia prepares zinc oxide |
| CN107673399A (en) * | 2017-11-13 | 2018-02-09 | 山东星苑锌业科技有限公司 | A kind of zinc oxide production technology for effectively reducing content of beary metal |
| CN114317965A (en) * | 2022-01-05 | 2022-04-12 | 重庆赛迪热工环保工程技术有限公司 | Process and device for smelting and reducing zinc-containing material by thermite method |
| CN114317964A (en) * | 2022-01-05 | 2022-04-12 | 重庆赛迪热工环保工程技术有限公司 | Process and device for reducing zinc-containing material by vacuum low-temperature aluminothermic process |
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| Publication number | Publication date |
|---|---|
| CN1219084C (en) | 2005-09-14 |
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