CN116397111A - Method for producing high-grade crude bismuth from decoppered slag - Google Patents
Method for producing high-grade crude bismuth from decoppered slag Download PDFInfo
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- CN116397111A CN116397111A CN202310321984.2A CN202310321984A CN116397111A CN 116397111 A CN116397111 A CN 116397111A CN 202310321984 A CN202310321984 A CN 202310321984A CN 116397111 A CN116397111 A CN 116397111A
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- copper
- bismuth
- arsenic
- antimony
- temperature
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- 229910052797 bismuth Inorganic materials 0.000 title claims abstract description 57
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 239000002893 slag Substances 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 229910052802 copper Inorganic materials 0.000 claims abstract description 42
- 239000010949 copper Substances 0.000 claims abstract description 42
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000003723 Smelting Methods 0.000 claims abstract description 33
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910052709 silver Inorganic materials 0.000 claims abstract description 30
- 239000004332 silver Substances 0.000 claims abstract description 30
- 229910052785 arsenic Inorganic materials 0.000 claims abstract description 26
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims abstract description 26
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 22
- 239000011593 sulfur Substances 0.000 claims abstract description 22
- 229910052787 antimony Inorganic materials 0.000 claims abstract description 21
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims abstract description 21
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 19
- 239000011701 zinc Substances 0.000 claims abstract description 19
- 230000003647 oxidation Effects 0.000 claims abstract description 6
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 20
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 13
- 229910000410 antimony oxide Inorganic materials 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 10
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 claims description 10
- 229910000416 bismuth oxide Inorganic materials 0.000 claims description 7
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 claims description 7
- 239000002817 coal dust Substances 0.000 claims description 6
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 claims description 6
- 239000011028 pyrite Substances 0.000 claims description 6
- 229910052683 pyrite Inorganic materials 0.000 claims description 6
- 239000000779 smoke Substances 0.000 claims description 6
- IKWTVSLWAPBBKU-UHFFFAOYSA-N a1010_sial Chemical compound O=[As]O[As]=O IKWTVSLWAPBBKU-UHFFFAOYSA-N 0.000 claims description 5
- 229910000413 arsenic oxide Inorganic materials 0.000 claims description 5
- 229960002594 arsenic trioxide Drugs 0.000 claims description 5
- ALKZAGKDWUSJED-UHFFFAOYSA-N dinuclear copper ion Chemical compound [Cu].[Cu] ALKZAGKDWUSJED-UHFFFAOYSA-N 0.000 claims description 5
- 230000005496 eutectics Effects 0.000 claims description 5
- 230000001590 oxidative effect Effects 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 5
- 238000007670 refining Methods 0.000 claims description 5
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 5
- 239000006104 solid solution Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 239000002023 wood Substances 0.000 claims description 5
- AQMRBJNRFUQADD-UHFFFAOYSA-N copper(I) sulfide Chemical compound [S-2].[Cu+].[Cu+] AQMRBJNRFUQADD-UHFFFAOYSA-N 0.000 claims description 2
- 238000000034 method Methods 0.000 description 7
- 229910000029 sodium carbonate Inorganic materials 0.000 description 6
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 5
- 239000000654 additive Substances 0.000 description 5
- 239000000460 chlorine Substances 0.000 description 5
- 229910052801 chlorine Inorganic materials 0.000 description 5
- 239000000428 dust Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical compound [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 2
- 239000010436 fluorite Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 229910021538 borax Inorganic materials 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- HWSZZLVAJGOAAY-UHFFFAOYSA-L lead(II) chloride Chemical compound Cl[Pb]Cl HWSZZLVAJGOAAY-UHFFFAOYSA-L 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 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
- C22B30/00—Obtaining antimony, arsenic or bismuth
- C22B30/06—Obtaining bismuth
-
- 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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/001—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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/04—Working-up slag
-
- 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
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/02—Refining by liquating, filtering, centrifuging, distilling, or supersonic wave action including acoustic waves
-
- 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
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ
-
- 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
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/10—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor, e.g. slagging or scorifying agents
- C22B9/103—Methods of introduction of solid or liquid refining or fluxing agents
-
- 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
Abstract
The invention discloses a method for producing high-grade crude bismuth by decoppering slag, which comprises the steps of decoppering slag smelting, arsenic and antimony removal by oxidation, copper removal by liquation, copper removal by adding sulfur, silver removal by adding zinc and the like.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to a method for producing high-grade crude bismuth by decoppering slag.
Background
There is a technology for producing crude bismuth by bismuth oxide in China: according to the bismuth oxide composition, the proportion is determined, additives such as sulfur concentrate, sodium carbonate, fluorite powder, coal dust and scrap iron are added, and then reduction smelting is carried out in a converter, so that the reduction atmosphere is enhanced, bismuth and most of lead are reduced into metal to form crude bismuth.
Also known are: a method for recovering refined bismuth and refined copper from high-copper bismuth slag comprises the following steps: 1) Mixing the high-copper bismuth slag with coke, sodium carbonate, borax, pyrite, fluorite and silica according to a proportion to obtain a mixed material, smelting the mixed material to produce matte, and controlling the temperature of a melt to produce crude bismuth, matte, alkaline residue and smoke dust. The above process technology is an industrial technology for producing crude bismuth in 1 converter, and does not have a technology for producing crude bismuth by copper slag removal.
When the chlorine is used for production, the lead removal production period is long, the chlorine use cost is high, the chlorine is not completely reacted in the production process, the environment pollution is caused by overflow of a collecting system, the direct bismuth yield in the production process is low, the primary qualification rate of products is low, the subsequent treatment cost of the generated lead chloride is high, the danger of the chlorine is high, the chlorine purchasing procedure is complex, the production and storage conditions are severe, and the safety risk is caused by easy leakage in the storage, production and use processes.
Disclosure of Invention
In order to solve or partially solve the problems existing in the related art, the invention provides a method for producing high-grade crude bismuth from decoppered slag.
The method comprises the following steps:
s1, smelting decoppered slag: adding additives such as copper-removing slag, pyrite, sodium carbonate, coal dust and the like into a converter, and then carrying out reduction smelting in the converter to produce primary crude bismuth;
s2, oxidizing and removing arsenic and antimony: the arsenic and antimony are removed by oxidation refining, the free enthalpy of arsenic, antimony oxide and bismuth oxide are greatly different, compressed air is blown in when the temperature is increased to 680-750 ℃ in a smelting pot, arsenic and antimony are preferentially oxidized to generate arsenic oxide and antimony oxide to volatilize bismuth liquid, so that the arsenic and antimony are removed, the operation time is 4-10h, the endpoint is reached when the volatilized white smoke is thin, and scum is fished out;
s3, copper removal by liquation: in a smelting pot, 50% of copper can be removed by smelting by controlling the temperature to 500 ℃ to enable copper to generate refractory compounds or eutectic solid solution to be separated out in a scum way by utilizing the characteristic that the solubility of copper in bismuth liquid varies with the temperature;
s4, adding sulfur and removing copper: copper is still more than 0.3%, sulfur is added, stirring is carried out to remove copper, the temperature of the vulcanizing operation is controlled to 280-330 ℃, the copper and sulfur are utilized to generate cuprous sulfide which has small density and is not melted in bismuth liquid for removal, and finally compressed air is blown when the temperature is raised to 650 ℃ to oxidize residual sulfurSO generation 2 Gas, and ending the copper removal operation;
s5, adding zinc and removing silver: in a smelting pot, low-temperature operation is adopted, zinc is added to remove silver at 420-500 ℃, and zinc and silver are based on the fact that stable refractory compounds are generated, and the density is small, so that scum is removed. The silver removing operation is good or bad, the quality and recovery rate of refined bismuth are greatly influenced, the silver content of bismuth liquid is lower than 0.003%, and the operation is finished.
Further, if the scum is thin in S2, a proper amount of caustic soda or wood dust is added to dry the scum so as to drag out the scum.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
The beneficial technical effects of the invention are as follows:
1. the crude bismuth produced by the process has high grade and low gold and silver content, and can be directly sold as a product.
2. The process is beneficial to reducing the production cost and the safety risk in the production process.
Detailed Description
Alternative embodiments of the present application will be described in more detail below. While alternative embodiments of the present application have been described, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
For clarity, the following examples are provided in detail.
Example 1
S1, smelting decoppered slag: adding additives such as copper-removing slag, pyrite, sodium carbonate, coal dust and the like into a converter, and then carrying out reduction smelting in the converter to produce primary crude bismuth;
s2, oxidizing and removing arsenic and antimony: arsenic and antimony are removed by oxidation refining, the free enthalpy of arsenic, antimony oxide and bismuth oxide are greatly different, compressed air is blown in a smelting pot when the temperature is increased to 680 ℃, arsenic and antimony are preferentially oxidized to generate arsenic oxide and antimony oxide, bismuth liquid is volatilized, and accordingly arsenic and antimony are removed, the operation time is 4 hours, the end point is reached when the volatilized white smoke is thin, and scum is fished out; if the scum is thin, adding a proper amount of caustic soda or wood dust to dry the scum so as to drag out the scum.
S3, copper removal by liquation: in a smelting pot, 50% of copper can be removed by smelting by controlling the temperature to 500 ℃ to enable copper to generate refractory compounds or eutectic solid solution to be separated out in a scum way by utilizing the characteristic that the solubility of copper in bismuth liquid varies with the temperature;
s4, adding sulfur and removing copper: copper is still more than 0.3%, sulfur is added, stirring is carried out to remove copper, the temperature is controlled at 280 ℃ during the sulfur adding operation, copper sulfide with small density and without being melted in bismuth liquid is utilized for removing copper, and finally compressed air is blown when the temperature is raised to 650 ℃, SO that residual sulfur is oxidized to generate SO 2 Gas, and ending the copper removal operation;
s5, adding zinc and removing silver: in a smelting pot, zinc is added at 420 ℃ to remove silver by adopting low-temperature operation, and the zinc and silver are based on the fact that stable refractory compounds are generated by zinc and silver, and the density is small, and scum is removed. The silver removing operation is good or bad, the quality and recovery rate of refined bismuth are greatly influenced, the silver content of bismuth liquid is lower than 0.003%, and the operation is finished.
The secondary crude bismuth is produced, the bismuth content is more than 70%, and the bismuth can be directly sold.
Example 2
S1, smelting decoppered slag: adding additives such as copper-removing slag, pyrite, sodium carbonate, coal dust and the like into a converter, and then carrying out reduction smelting in the converter to produce primary crude bismuth;
s2, oxidizing and removing arsenic and antimony: arsenic and antimony are removed by oxidation refining, the free enthalpy of arsenic, antimony oxide and bismuth oxide are greatly different, compressed air is blown in when the temperature is raised to 750 ℃ in a smelting pot, arsenic and antimony are preferentially oxidized to generate arsenic oxide and antimony oxide to volatilize bismuth liquid, so that the arsenic and antimony are removed, the operation time is 4-10h, the endpoint is reached when the volatilized white smoke is thin, and scum is fished out; if the scum is thin, adding a proper amount of caustic soda or wood dust to dry the scum so as to drag out the scum.
S3, copper removal by liquation: in a smelting pot, 50% of copper can be removed by smelting by controlling the temperature to 500 ℃ to enable copper to generate refractory compounds or eutectic solid solution to be separated out in a scum way by utilizing the characteristic that the solubility of copper in bismuth liquid varies with the temperature;
s4, adding sulfur and removing copper: copper is still more than 0.3%, sulfur is added, stirring is carried out to remove copper, the temperature is controlled at 330 ℃ during the sulfur adding operation, copper sulfide with small density and without being melted in bismuth liquid is utilized for removing copper, and finally compressed air is blown when the temperature is raised to 650 ℃, SO that residual sulfur is oxidized to generate SO 2 Gas, and ending the copper removal operation;
s5, adding zinc and removing silver: in a smelting pot, zinc is added at 500 ℃ to remove silver by adopting low-temperature operation, and the zinc and silver are based on the fact that stable refractory compounds are generated by zinc and silver, and the density is small, and scum is removed. The silver removing operation is good or bad, the quality and recovery rate of refined bismuth are greatly influenced, the silver content of bismuth liquid is lower than 0.003%, and the operation is finished.
The secondary crude bismuth is produced, the bismuth content is more than 70%, and the bismuth can be directly sold.
Example 3
S1, smelting decoppered slag: adding additives such as copper-removing slag, pyrite, sodium carbonate, coal dust and the like into a converter, and then carrying out reduction smelting in the converter to produce primary crude bismuth;
s2, oxidizing and removing arsenic and antimony: arsenic and antimony are removed by oxidation refining, the free enthalpy of arsenic, antimony oxide and bismuth oxide are greatly different, compressed air is blown in when the temperature is raised to 700 ℃ in a smelting pot, arsenic and antimony are preferentially oxidized to generate arsenic oxide and antimony oxide, bismuth liquid is volatilized, and accordingly arsenic and antimony are removed, the operation time is 7 hours, the end point is reached when the volatilized white smoke is thin, and scum is fished out; if the scum is thin, adding a proper amount of caustic soda or wood dust to dry the scum so as to drag out the scum.
S3, copper removal by liquation: in a smelting pot, 50% of copper can be removed by smelting by controlling the temperature to 500 ℃ to enable copper to generate refractory compounds or eutectic solid solution to be separated out in a scum way by utilizing the characteristic that the solubility of copper in bismuth liquid varies with the temperature;
s4, adding sulfur and removing copper: copper is still more than 0.3%, sulfur is added, stirring is carried out to remove copper, the temperature is controlled to 300 ℃ during the sulfur adding operation, the copper is removed by utilizing the copper sulfide with small density generated by sulfur and copper and not melted in bismuth liquid, and finally compressed air is blown when the temperature is raised to 650 ℃, SO that residual sulfur is oxidized to generate SO 2 Gas, and ending the copper removal operation;
s5, adding zinc and removing silver: in a smelting pot, zinc is added at 450 ℃ to remove silver by adopting low-temperature operation, and the zinc and silver are based on the stable refractory compound generated by zinc and silver, so that the density is small and scum is removed. The silver removing operation is good or bad, the quality and recovery rate of refined bismuth are greatly influenced, the silver content of bismuth liquid is lower than 0.003%, and the operation is finished.
The secondary crude bismuth is produced, the bismuth content is more than 70%, and the bismuth can be directly sold.
Claims (2)
1. The method for producing high-grade crude bismuth by decoppering slag is characterized by comprising the following steps:
s1, smelting decoppered slag: adding decoppered slag, pyrite (3-5% of the weight of the decoppered slag), soda (10-13% of the weight of the decoppered slag) and coal dust (2-4% of the weight of the decoppered slag) into a converter, and then carrying out reduction smelting in the converter to produce primary crude bismuth;
s2, oxidizing and removing arsenic and antimony: the arsenic and antimony are removed by oxidation refining, the free enthalpy of arsenic, antimony oxide and bismuth oxide are greatly different, compressed air is blown in when the temperature is increased to 680-750 ℃ in a smelting pot, arsenic and antimony are preferentially oxidized to generate arsenic oxide and antimony oxide to volatilize bismuth liquid, so that the arsenic and antimony are removed, the operation time is 4-10h, the endpoint is reached when the volatilized white smoke is thin, and scum is fished out;
s3, copper removal by liquation: in a smelting pot, 50% of copper can be removed by smelting by controlling the temperature to 500 ℃ to enable copper to generate refractory compounds or eutectic solid solution to be separated out in a scum way by utilizing the characteristic that the solubility of copper in bismuth liquid varies with the temperature;
s4, adding sulfur and removing copper: copper is still more than 0.3%, sulfur is added, stirring is carried out to remove copper, the temperature of the vulcanizing operation is controlled to 280-330 ℃, the copper and sulfur are utilized to generate cuprous sulfide with small density and not melted in bismuth liquid for removal, and finally compressed air is blown when the temperature is raised to 650 ℃, SO that residual sulfur is oxidized to generate SO 2 Gas, and ending the copper removal operation;
s5, adding zinc and removing silver: in a smelting pot, low-temperature operation is adopted, zinc addition and silver removal are based on stable refractory compounds generated by zinc and silver, the density is small, scum removal is performed, the silver removal operation is good or bad, the influence on the quality and recovery rate of refined bismuth is large, the silver content of bismuth liquid is lower than 0.003%, and the operation is finished.
2. The method for producing high-grade crude bismuth from decoppered slag as claimed in claim 1, wherein if the dross is thin in S2, a proper amount of caustic soda or wood chips is added to dry the dross so as to scoop the dross.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310321984.2A CN116397111A (en) | 2023-03-29 | 2023-03-29 | Method for producing high-grade crude bismuth from decoppered slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310321984.2A CN116397111A (en) | 2023-03-29 | 2023-03-29 | Method for producing high-grade crude bismuth from decoppered slag |
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| Publication Number | Publication Date |
|---|---|
| CN116397111A true CN116397111A (en) | 2023-07-07 |
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| CN202310321984.2A Pending CN116397111A (en) | 2023-03-29 | 2023-03-29 | Method for producing high-grade crude bismuth from decoppered slag |
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| CN (1) | CN116397111A (en) |
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- 2023-03-29 CN CN202310321984.2A patent/CN116397111A/en active Pending
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