CN112301214B - Pulp type feeding system and method - Google Patents
Pulp type feeding system and method Download PDFInfo
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- CN112301214B CN112301214B CN202011178329.9A CN202011178329A CN112301214B CN 112301214 B CN112301214 B CN 112301214B CN 202011178329 A CN202011178329 A CN 202011178329A CN 112301214 B CN112301214 B CN 112301214B
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- pulp
- storage tank
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- conveying
- ore pulp
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000003860 storage Methods 0.000 claims abstract description 55
- 239000002002 slurry Substances 0.000 claims abstract description 39
- 238000009826 distribution Methods 0.000 claims abstract description 34
- 239000007921 spray Substances 0.000 claims abstract description 28
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000012141 concentrate Substances 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 7
- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical compound [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 claims description 5
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 claims description 2
- 229910052976 metal sulfide Inorganic materials 0.000 claims description 2
- 238000004062 sedimentation Methods 0.000 abstract description 8
- 239000002184 metal Substances 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 230000005484 gravity Effects 0.000 abstract description 4
- 238000003723 Smelting Methods 0.000 abstract description 3
- 239000006185 dispersion Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 238000010926 purge Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000001180 sulfating effect Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- 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
- C22B1/02—Roasting processes
- C22B1/06—Sulfating roasting
-
- 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
-
- 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
- C22B15/00—Obtaining copper
- C22B15/0002—Preliminary treatment
-
- 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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- 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)
- Paper (AREA)
Abstract
A slurry type feeding system and a method belong to the technical field of non-ferrous metal smelting feeding. The pulp type feeding system comprises a pulp storage tank, a main pulp pump, a pulp distribution pipe, a return pipeline, a conveying pipeline, a pulp conveying pump, a gas storage tank, a spray gun and a fluidized bed furnace, wherein the pulp storage tank is communicated with the pulp distribution pipe through the main pulp pump, the pulp distribution pipe is respectively connected with the return pipeline and the conveying pipeline, the pulp storage tank, the main pulp pump, the pulp distribution pipe and the return pipeline form a circulation loop of pulp, the conveying pipeline is connected with the spray gun through the pulp conveying pump, a nozzle of the spray gun corresponds to a feed inlet of the fluidized bed furnace, and the gas storage tank is connected with the spray gun through a gas circuit. The ore pulp is always in a flowing and uniformly dispersed state in the circulating loop, so that the sedimentation and blockage of the ore pulp in the pipeline are effectively prevented. The invention effectively solves the problem of sedimentation and blockage of high-concentration and large-specific gravity ore pulp, improves the dispersion effect of materials in the fluidized bed roaster, and ensures continuous and stable operation of fluidized bed roasting production.
Description
Technical Field
The invention belongs to the technical field of non-ferrous metal smelting feeding, relates to a slurry type feeding system and method, and particularly relates to a slurry type feeding system and method for a non-ferrous metal smelting fluidized bed roaster.
Background
The existing copper sulfide concentrate treatment process mainly comprises the steps of roasting, leaching, extracting, electrodepositing, flue gas acid making and the like. The roasting process adopts fluidized bed boiling roasting process technology, and the feeding modes mainly comprise two types: dry feeding, namely conveying the dried concentrate to a fluidized bed furnace by adopting a belt conveying mode and the like; and (3) slurry feeding, namely supplementing water or solution into the concentrate to prepare ore slurry with a certain concentration, and then conveying the ore slurry into a boiling furnace. The dry feeding has the defects of large investment, high energy consumption, serious metal loss, poor working condition and the like, so the slurry feeding technology is mostly adopted for roasting feeding.
The traditional pulp feeding technology is similar to the technology of patent CN 100552062A. The copper sulfide concentrate ore pulp has the characteristics of high concentration, high specific gravity and easy sedimentation, and is easy to sediment and block in a pipeline, an outlet of a pulp storage tank, the bottom of a head tank, an outlet of the head tank and the like, and the shutdown maintenance is often needed, so that the system operation is discontinuous, and the production is influenced. The traditional paddle type feeding technology cannot effectively solve the problems.
People urgently need a new pulp type feeding system and a new pulp type feeding method, which meet the feeding requirements of ore pulp which is represented by copper sulfide concentrate and has high concentration, large specific gravity and easy sedimentation, and avoid the sedimentation and blockage of the ore pulp at all parts of the feeding system.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a fluidized bed furnace pulp type feeding system and a method which have high concentration, large specific gravity and easy sedimentation of ore pulp, are stable in operation and have no sedimentation and blockage.
One aspect of the invention provides a slurry type feeding system which is characterized by comprising a slurry storage tank, a main slurry pump, a slurry distribution pipe, a return pipeline, a conveying pipeline, a slurry conveying pump, a gas storage tank, a spray gun and a fluidized bed furnace, wherein the slurry storage tank is communicated with the slurry distribution pipe through the main slurry pump, the slurry distribution pipe is respectively connected with the return pipeline and the conveying pipeline, the slurry storage tank, the main slurry pump, the slurry distribution pipe and the return pipeline form a slurry circulation loop, the conveying pipeline is connected with the spray gun through the slurry conveying pump, a nozzle of the spray gun corresponds to a feed inlet of the fluidized bed furnace, and the gas storage tank is connected with the spray gun through a gas circuit. Conveying the ore pulp in the pulp storage tank to an ore pulp distribution pipe by a main ore pulp pump, and enabling part of the ore pulp in the ore pulp distribution pipe to flow back to the pulp storage tank through a return pipeline; and the residual ore pulp in the ore pulp distribution pipe enters an ore pulp conveying pump through a conveying pipeline, the ore pulp is conveyed to the spray gun by the ore pulp conveying pump, and the ore pulp in the spray gun is sprayed into the fluidized bed furnace by compressed air in the air storage tank.
The key innovation of the invention is that the pulp storage tank, the main pulp pump, the pulp distribution pipe and the return pipeline form a pulp circulation loop together, and the pulp is always in a flowing and uniformly dispersed state in the circulation loop, thereby effectively preventing the pulp from settling and blocking in the pipeline.
Furthermore, the number of the feed inlets of the conveying pipeline, the ore conveying slurry pump, the spray gun and the fluidized bed furnace is n, and n is a natural number.
Furthermore, a valve is arranged at the outlet of the slurry storage tank, and the front and the rear of the outlet valve of the slurry storage tank are connected with the gas storage tank through gas circuits; a valve is arranged between the conveying pipeline and the conveying slurry pump, and the front and the rear of the conveying pipeline valve are connected with the gas storage tank through a gas circuit; the pressure of the compressed air in the air path is 0.1-1 MPa. The compressed air can blow the pipeline to prevent the pipeline from being blocked.
Further, the main slurry pump and the conveying slurry pump are centrifugal pumps, mixed flow pumps, axial flow pumps, vortex pumps, reciprocating pumps, rotor pumps or hose pumps.
Furthermore, the pressure of the compressed air in the spray gun is 0.2-0.6 MPa.
Further, the ore pulp distribution pipe is a closed pipeline and is made of 316L steel or 304 steel.
Furthermore, n is more than or equal to 2 and less than or equal to 12, and the n spray guns are uniformly distributed on the same horizontal plane.
Furthermore, the ore pulp is copper sulfide ore concentrate, gold ore concentrate or other nonferrous metal sulfide ore concentrate ore pulp, and the concentration of the ore pulp is 50-75%.
Another aspect of the present invention is to provide a method of feeding using the paddle feed system described above, comprising the steps of:
(1) stirring the ore pulp in the pulp storage tank, and feeding the ore pulp into a main ore pulp pump after uniformly stirring;
(2) the main pulp pump conveys pulp to a pulp distribution pipe;
(3) part of ore pulp entering the ore pulp distribution pipe flows back to the ore pulp storage tank through a return pipeline;
(4) and the residual ore pulp entering the ore pulp distribution pipe enters an ore pulp conveying pump through a conveying pipeline, the ore pulp conveying pump conveys the residual ore pulp into a spray gun, and the compressed air in the air storage tank sprays the ore pulp in the spray gun into the fluidized bed furnace.
Further, compressed air is used to purge the piping of the paddle feed system when necessary.
Compared with the prior art, the invention has the main advantages that:
1. the fluidized bed furnace pulp type feeding system and the fluidized bed furnace pulp type feeding method form a dynamic pulp circulation loop among the pulp storage tank, the pulp pump, the pulp distribution pipe and the return pipeline, and compressed air is used for blowing at key positions, so that high-concentration, large-specific-gravity and easily-settled pulp is kept uniformly mixed in the conveying process, and the problem of settling and blocking of high-concentration pulp is effectively solved.
2. The invention cancels the elevated tank, and adopts the technology of conveying and blowing the compressed air at the key part by the ore pulp pump, thus solving the problems of ore pulp sedimentation at the bottom of the elevated tank and pipeline blockage at the outlet of the elevated tank; meanwhile, the investment is saved, and the subsequent maintenance operation and the like are more convenient.
3. The invention keeps the ore pulp in a uniform dispersion state in the pipeline all the time, so that the ore pulp has better dispersion effect in the process of entering the roasting furnace from the spray gun, and is beneficial to improving the conversion rate of sulfating roasting, increasing the leaching rate of subsequent working sections and further improving the recovery rate of metals.
Drawings
FIG. 1 is a schematic view of a paddle feed system according to the present invention.
Reference numerals are as follows: 1-a pulp storage tank, 2-a compressed air pipeline for cleaning an outlet pipeline of the pulp storage tank, 3-a main pulp pump, 4-a pulp distribution pipe, 5-a return pipeline, 6-a conveying pipeline, 7-a compressed air pipeline for cleaning the conveying pipeline, 8-a conveying pulp pump, 9-an air storage tank, 10-a spray gun and 11-a fluidized bed furnace.
Detailed Description
In order to clearly and specifically explain the technical advantages of the present invention, the technical solutions of the present invention are further described by the following specific embodiments in conjunction with the accompanying drawings.
Referring to the attached figure 1 of the specification, the invention provides a pulp type feeding method, which comprises the following steps:
(1) and the ore pulp is stirred for 1-5h in the pulp storage tank 1 and then conveyed to a main ore pulp pump 3. Wherein, a pair of compressed air pipelines 2 are arranged at the front and the rear of an outlet valve of the pulp storage tank 1, and the compressed air sweeps the pulp in the pipeline to prevent the pipeline from being blocked. The pulp is conveyed to the pulp distribution pipe 4 after passing through the pulp pump 3, and part of the pulp returns to the pulp storage tank 1 through the return pipe 5 of the pulp distribution pipe 4.
(2) The residual ore pulp enters into a conveying ore pulp pump 8 which respectively corresponds to the conveying pipelines 6 through a plurality of conveying pipelines 6 of the ore pulp distribution pipe 4, compressed air pipelines 7 are arranged at the front and the rear of the conveying pipeline valves, and the compressed air sweeps the ore pulp in the pipelines to prevent the pipelines from being blocked at the section. The slurry is fed to the lance 10 by the feed slurry pump 8. Compressed air from an air storage tank 9 enters a spray gun 10 to be mixed with slurry from a slurry conveying pump 8, and the mixture is dispersed and then sprayed into a fluidized bed furnace 11 for sulfating roasting.
Example 1
(1) And adding the prepared copper concentrate ore pulp with the concentration of 65% into a pulp storage tank with the diameter of 6000X 6500 mm. After stirring for 3 hours in the pulp storage tank, the pulp is pumped to the pulp distribution pipe through a centrifugal pump, and a compressed air purging pipeline is arranged at the outlet of the pulp storage tank.
(2) The ore pulp is divided by a distribution pipe, one part of the ore pulp returns to a pulp storage tank through a return pipeline, the rest part of the ore pulp enters 6 corresponding spray guns through 6 hose pumps through a conveying pipeline respectively, the ore pulp is mixed with compressed air from an air storage tank and is sprayed into a roasting furnace after being dispersed, and the 6 spray guns continuously feed at the same time.
Example 2
(1) And adding the prepared copper concentrate ore pulp with the concentration of 60% into a pulp storage tank with the diameter of 2000 multiplied by 2500 mm. After stirring for 2 hours in the pulp storage tank, the pulp is pumped to the pulp distribution pipe through a centrifugal pump, and a compressed air purging pipeline is arranged at the outlet of the pulp storage tank.
(2) The ore pulp is divided by a distribution pipe, one part of the ore pulp returns to the pulp storage tank through a return pipeline, the rest part of the ore pulp enters corresponding spray guns through a plurality of hose pumps through a conveying pipeline respectively, is mixed with compressed air from an air storage tank and is sprayed into the roasting furnace after being dispersed, and a compressed air purging pipeline is arranged at an inlet of the distribution pipe conveying pipeline.
Example 3
(1) The prepared gold concentrate ore pulp with the concentration of 70 percent is added into a slurry storage tank with the diameter of 3000 multiplied by 4500 mm. After stirring for 3 hours in the pulp storage tank, the pulp is pumped to the pulp distribution pipe through a centrifugal pump, and a compressed air purging pipeline is arranged at the outlet of the pulp storage tank.
(2) The ore pulp is divided by a distribution pipe, one part of the ore pulp returns to a pulp storage tank through a return pipeline, the other part of the ore pulp enters 4 corresponding spray guns through 4 hose pumps through a conveying pipeline respectively, the ore pulp is mixed with compressed air from an air storage tank and is sprayed into a roasting furnace after being dispersed, and the 4 spray guns continuously feed at the same time.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention disclosed herein fall within the scope and disclosure of the present invention.
Claims (9)
1. A pulp type feeding system is characterized by comprising a pulp storage tank, a main pulp pump, a pulp distribution pipe, a return pipeline, a conveying pulp pump, a gas storage tank, a spray gun and a fluidized bed furnace, wherein the pulp storage tank is communicated with the pulp distribution pipe through the main pulp pump; the outlet of the slurry storage tank is provided with a valve, and the front and the rear of the outlet valve of the slurry storage tank are connected with an air storage tank through air passages; a valve is arranged between the conveying pipeline and the conveying slurry pump, and the front and the rear of the conveying pipeline valve are connected with the gas storage tank through gas circuits; the pressure of the compressed air in the air path is 0.1-1 MPa.
2. The slurry feeding system according to claim 1, wherein the number of the conveying pipelines, the conveying slurry pumps, the spray guns and the feed inlets of the fluidized bed furnace is n, and n is a natural number.
3. The paddle feed system of claim 1, wherein the main and transport slurry pumps are centrifugal, mixed, axial, vortex, reciprocating, rotor, or hose pumps.
4. Paddle feed system according to claim 1, wherein the pressure of the compressed air in the lance is 0.2-0.6 MPa.
5. The paddle feed system of claim 1, wherein the slurry distribution conduit is a closed conduit of 316L or 304 steel.
6. The paddle feed system of claim 2, wherein n is 2 and 12, and the n lances are evenly distributed on the same horizontal plane.
7. The pulp feed system of claim 1, wherein the pulp is a pulp of copper sulfide concentrate, gold concentrate or other non-ferrous metal sulfide concentrate, having a pulp concentration of 50-75%.
8. A method of feeding using a paddle feed system according to any of claims 1-7, comprising the steps of:
(1) stirring the ore pulp in the pulp storage tank, and feeding the ore pulp into a main ore pulp pump after uniformly stirring;
(2) the main pulp pump conveys pulp to a pulp distribution pipe;
(3) part of ore pulp entering the ore pulp distribution pipe flows back to the ore pulp storage tank through a return pipeline;
(4) and the residual ore pulp entering the ore pulp distribution pipe enters an ore pulp conveying pump through a conveying pipeline, the ore pulp is conveyed into the spray gun by the ore pulp conveying pump, and the ore pulp in the spray gun is sprayed into the fluidized bed furnace by compressed air in the air storage tank.
9. The method of claim 8, wherein compressed air is used to clean the tubes of the paddle feed system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011178329.9A CN112301214B (en) | 2020-10-29 | 2020-10-29 | Pulp type feeding system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011178329.9A CN112301214B (en) | 2020-10-29 | 2020-10-29 | Pulp type feeding system and method |
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| Publication Number | Publication Date |
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| CN112301214A CN112301214A (en) | 2021-02-02 |
| CN112301214B true CN112301214B (en) | 2022-08-19 |
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4248379A (en) * | 1979-08-16 | 1981-02-03 | Nordson Corporation | Powder spray color change system |
| CN100552062C (en) * | 2006-10-24 | 2009-10-21 | 山东国大黄金股份有限公司 | Gold smelting boiling roasting furnace slurry type feeding producing process and production equipment thereof |
| CN202913009U (en) * | 2012-10-12 | 2013-05-01 | 唐山钢铁国际工程技术有限公司 | Improved convey device for slurry generated during wet dust removal of converter |
| CN203971726U (en) * | 2014-05-30 | 2014-12-03 | 沈阳远大科技园有限公司 | SNCR equipment for denitrifying flue gas |
| CN204588719U (en) * | 2015-02-12 | 2015-08-26 | 昆明有色冶金设计研究院股份公司 | A kind of surge pump drawing-in device |
| CN204842382U (en) * | 2015-07-24 | 2015-12-09 | 金川集团股份有限公司 | Ore pulp pipeline protection device |
| CN207886966U (en) * | 2018-01-18 | 2018-09-21 | 广州奥恺德电气科技有限公司 | A lime slurry belt pressure conveying device |
| CN109230546A (en) * | 2018-07-09 | 2019-01-18 | 中国能源建设集团广东省电力设计研究院有限公司 | Pneumatic ash transmitting system |
| CN209174525U (en) * | 2018-10-22 | 2019-07-30 | 南京中电环保科技有限公司 | System with blow device |
| CN110143621A (en) * | 2019-04-17 | 2019-08-20 | 克拉玛依沃森环保科技有限公司 | Liquid waste processing unit and its processing method |
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