CN103643049A - Method for smelting lead dross - Google Patents
Method for smelting lead dross Download PDFInfo
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- CN103643049A CN103643049A CN201310666249.1A CN201310666249A CN103643049A CN 103643049 A CN103643049 A CN 103643049A CN 201310666249 A CN201310666249 A CN 201310666249A CN 103643049 A CN103643049 A CN 103643049A
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- smelting
- lead
- copper
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- silica frost
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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
Abstract
The invention discloses a method for smelting lead dross. A soda-borax-coke powder oxidation-reduction method is adopted for smelting. The method comprises the following steps: firstly, uniformly mixing lead dross with a solvent according to a certain ratio; secondly, feeding the mixed lead dross into a reflection furnace, smelting the mixed lead dross, after smelting for a certain time, adding matte at 1,000-1,100 DEG C, discharging crude lead at 600-700 DEG C, adding matte into a copper smelting system, roughly smelting the copper so as to generate crude copper, returning crude lead to an electric lead system, refining, collecting the fume of the reflection furnace by using a pulse cloth bag and feeding back the fume to the crude lead smelting system. The method has the advantages that the lead dross feeding time is shortened, i.e., the original twice feeding is replaced by once feeding; the smelting efficiency is improved, i.e., the original smelting time is 12 hours, and now the smelting time is reduced to be 10 hours; the grade of the lead in the crude lead is improved by 1%, the grade of bismuth is improved by 1%, and the grade of silver is increased by 400g/t.
Description
Technical field
The present invention relates to a kind of non-ferrous metal metallurgy method, relate in particular to a kind of smelting process of plumbous scum silica frost.
Background technology
Plumbous scum silica frost refers to and in pyrorefining process, floats on lead metal surface, the solid matter that the main molten drop (piece) of the impurity compound being formed by refining process and mechanical entrapment forms, mainly in market pot, complete, the scum silica frost of pulling out from market pot contains the valuable metals such as lead (Pb), bismuth (Bi), antimony (Sb), gold (Au), silver (Ag), copper (Cu), after reverberatory furnace melt processed, the lead reclaiming wherein forms lead bullion, returns to plumbous electrolytic system, and enriching Cu forms matte.
The processing of plumbous scum silica frost completes in reverberatory furnace, and technique mainly adopts soda---and iron filings method, is about to soda (Na
2cO
3), the flux such as iron filings, plumbous oxide, coke powder carries out melting after mixing with scum silica frost, adds that iron filings stir, slag making after fusing, matte and plumbous liquor ratio are heavy different and layering is emitted.
Due to the method charging at twice, one time charging temperature of fusion is controlled at 800 ~ 900 ℃, and secondary feeds temperature of fusion is controlled at 1000 ~ 1050 ℃, and temperature of fusion is controlled at 1050 ~ 1100 ℃, cause plumbous scum silica frost temperature of fusion long, furnace charge is too much, furnace temperature is too low, the interior charge level coal ash bed thickness of stove; Plumbous, matte school closure is bad, causes lead bullion direct yield low, the problem such as lead tolerance height in lead matte.
Flux Main Function is as follows.
Soda (Na
2cO
3): in reverberatory smelting process, major part is sulfided into sodium sulphite (Na2S) and enters matte, and rest part forms various salts and enters slag, thereby reduces matte and slag melting, makes melting cross kind and carries out at a lower temperature.Also make matte lead tolerance greatly reduce simultaneously.
Iron filings: make lead sulfide be replaced as metallic lead, reduce matte leaded.
Coke powder: make plumbous oxide be reduced into metallic lead and prevent bath surface oxidation in fusion process.
Summary of the invention
The technical problem that will solve required for the present invention is to overcome the deficiency existing in existing plumbous scum silica frost smelting technology, proposes a kind of plumbous scum silica frost smelting process, meets the demand that present lead metallurgy industry is produced.
The present invention is achieved in that a kind of smelting process of plumbous scum silica frost, comprises following step.
1, plumbous scum silica frost is mixed with flux according to certain ratio, blending ratio is as shown in the table.
| Scum silica frost | Soda ash | Fluorite | Sulphur | Borax | Coke powder |
| 100% | 3%-5% | 0.5%-1% | 0.5%-1% | 1%-2% | 1%-3% |
Flux Main Function is as follows.
Soda (Na
2cO
3): in reverberatory smelting process, major part is sulfided into sodium sulphite (Na
2s) enter matte, rest part forms various salts and enters slag, thereby reduces matte and slag melting, makes melting cross kind and carries out at a lower temperature.Also make matte lead tolerance greatly reduce simultaneously.
Fluorite (CaF
2): reduce matte and slag melting, strengthen the mobility of melt.
Sulphur (S): mainly supplement the composition of sulphur in raw material, thereby generate lead sulfide and cuprous sulfide (Cu
2s) enter matte.
Borax (Na
2b
4o
7): be a kind of strong oxidizer, make in scum silica frost most of metal oxidized, form oxide compound, remove arsenic.
Coke powder (C): make metal oxide and sulfide, be reduced into gold plumbous, and Au, Ag, Sb, Bi etc. are concentrated in lead bullion, make copper be enriched in matte simultaneously, due to plumbous different with the proportion of matte, and be able to separation, coke powder prevents upper layer material oxidation simultaneously, in furnace charge, plumbous oxide exists with lead sulfide and carries out cross reaction generation metallic lead, improves the rate of recovery of the valuable metals such as Pb, Bi, Sb, Au, Ag, Cu.
2, by the plumbous scum silica frost after mixing, add reverberatory furnace to carry out melting, smelting temperature is controlled at 980 ~ 1200 ℃.
3, smelt after for some time, in the time of 1000 ~ 1100 ℃, put matte, go out lead bullion in the time of 600 ~ 700 ℃, matte enters the thick refining output blister copper that copper smelting system carries out copper, lead bullion returns to electric lead system and carries out refining, and reverberatory furnace cigarette ash collects by pulse bag the lead smelt system of returning.
A kind of ultimate principle of plumbous scum silica frost smelting process is as follows.
Adopt soda---borax---coke powder oxidation reduction process reaction equation to be:
2Na
2CO
3+2PbS+C＝2Na
2S+3CO
2+2Pb
3Na
2B
4O
7+2PbS=2PbO+2SO
2+3Na
2B
4O
5
PbS+2PbO=3Pb+SO
2
2PbO+C=2Pb+CO
2
The smelting process of a kind of plumbous scum silica frost of the present invention, has following advantage.
1, reduce the plumbous scum silica frost pan feeding time, by twice original pan feeding, change pan feeding into one time.
2, improve smelting efficiency, original smelting time is 12 h, and smelting time is 10 h now.
3, in lead bullion, plumbous grade improves 1%, and bismuth grade improves 1%, and silver-colored grade improves 400g/t.
Accompanying drawing explanation
Fig. 1 is a kind of smelting process process flow diagram of plumbous scum silica frost.
Embodiment
Below in conjunction with embodiment, explain in detail technical scheme provided by the present invention, but not as the restriction to the claims in the present invention protection domain.
Specific embodiment.
Embodiment 1: by the plumbous scum silica frost of raw material according to scum silica frost 100%, soda ash 3 ~ 5%, fluorite 0.5% ~ 1%, sulphur 0.5% ~ 1%, borax 1% ~ 2%, the certain ratio of coke powder 1% ~ 3% mixes with flux, add reverberatory furnace to carry out melting, smelting temperature is controlled at 980 ~ 1200 ℃, smelt after one section of 10h, in the time of 1000 ~ 1100 ℃, put matte, in the time of 600 ~ 700 ℃, go out lead bullion, matte enters the thick refining output blister copper that copper smelting system carries out copper, lead bullion returns to electric lead system and carries out refining, reverberatory furnace cigarette ash collects by pulse bag the lead smelt system of returning, the plumbous scum silica frost grade of raw material is: Pb:71.18%, Bi:0.53%, Cu:9.75%, Sb:5.31%, S:4.09%, Au:4.2g/t, Ag:3654g/t, output lead bullion grade: Pb:91.78%, Bi:1.75%, Cu:0.56%, Sb:3.65%, Au:2.7g/t, Ag:2584g/t.
Embodiment 2: by the plumbous scum silica frost of raw material according to scum silica frost 100%, soda ash 3 ~ 5%, fluorite 0.5% ~ 1%, sulphur 0.5% ~ 1%, borax 1% ~ 2%, the certain ratio of coke powder 1% ~ 3% mixes with flux, add reverberatory furnace to carry out melting, smelting temperature is controlled at 980 ~ 1200 ℃, smelt after one section of 10h, in the time of 1000 ~ 1100 ℃, put matte, in the time of 600 ~ 700 ℃, go out lead bullion, matte enters the thick refining output blister copper that copper smelting system carries out copper, lead bullion returns to electric lead system and carries out refining, reverberatory furnace cigarette ash collects by pulse bag the lead smelt system of returning, the plumbous scum silica frost grade of raw material is: Pb:60.94%, Bi:0.5%, Cu:14.53%, Sb:3.11%, S:3.55%, Au:2.8g/t, Ag:2601g/t, output lead bullion grade: Pb:93.02%, Bi:1.47%, Cu:0.32%, Sb:2.98%, Au:3.6g/t, Ag:2675g/t.
Embodiment 3: by the plumbous scum silica frost of raw material according to scum silica frost 100%, soda ash 3 ~ 5%, fluorite 0.5% ~ 1%, sulphur 0.5% ~ 1%, borax 1% ~ 2%, the certain ratio of coke powder 1% ~ 3% mixes with flux, add reverberatory furnace to carry out melting, smelting temperature is controlled at 980 ~ 1200 ℃, smelt after one section of 10h, in the time of 1000 ~ 1100 ℃, put matte, in the time of 600 ~ 700 ℃, go out lead bullion, matte enters the thick refining output blister copper that copper smelting system carries out copper, lead bullion returns to electric lead system and carries out refining, reverberatory furnace cigarette ash collects by pulse bag the lead smelt system of returning, the plumbous scum silica frost grade of raw material is: Pb:60.25%, Bi:1.8%, Cu:18.69%, Sb:3.43%, S:4.09%, Au:2.4g/t, Ag:2767g/t, output lead bullion grade: Pb:93.12%, Bi:2.82%, Cu:0.53%, Sb:2.31%, Au:2.9g/t, Ag:3076g/t.
Embodiment 4: by the plumbous scum silica frost of raw material according to scum silica frost 100%, soda ash 3 ~ 5%, fluorite 0.5% ~ 1%, sulphur 0.5% ~ 1%, borax 1% ~ 2%, the certain ratio of coke powder 1% ~ 3% mixes with flux, add reverberatory furnace to carry out melting, smelting temperature is controlled at 980 ~ 1200 ℃, smelt after one section of 10h, in the time of 1000 ~ 1100 ℃, put matte, in the time of 600 ~ 700 ℃, go out lead bullion, matte enters the thick refining output blister copper that copper smelting system carries out copper, lead bullion returns to electric lead system and carries out refining, reverberatory furnace cigarette ash collects by pulse bag the lead smelt system of returning, the plumbous scum silica frost grade of raw material is: Pb::62.17 %, Bi: trace, Cu:15.01%, Sb:2.24%, S:4.09%, Au:6.6g/t, Ag:2978g/t, output lead bullion grade: Pb:92.85%, Bi:1.29%, Cu:0.23%, Sb:2.99%, Au:6.08g/t, Ag:3734g/t.
Claims (2)
1. a smelting process for plumbous scum silica frost, comprises the following steps:
(1), plumbous scum silica frost is mixed with flux according to certain ratio;
(2), by the plumbous scum silica frost after mixing, add reverberatory furnace to carry out melting;
(3), smelt after for some time, in the time of 1000 ~ 1100 ℃, put matte, in the time of 600 ~ 700 ℃, go out lead bullion, matte enters the thick refining output blister copper that copper smelting system carries out copper, lead bullion returns to electric lead system and carries out refining, and reverberatory furnace cigarette ash collects by pulse bag the lead smelt system of returning
It is characterized in that: flux adopts soda, borax, coke powder to carry out oxidation-reduction smelting.
2. plumbous scum silica frost smelting process according to claim 1, is being characterised in that: in described step (2), smelting temperature is 980 ~ 1200 ℃.
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|---|---|---|---|
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|---|---|---|---|
| CN201310666249.1A CN103643049A (en) | 2013-12-07 | 2013-12-07 | Method for smelting lead dross |
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ID=50248329
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105543493A (en) * | 2015-12-25 | 2016-05-04 | 西部矿业股份有限公司 | Lead dross treatment method |
| CN106282659A (en) * | 2016-08-21 | 2017-01-04 | 株洲冶炼集团股份有限公司 | A kind of lead smelting removes antimony agent and except antimony technique with compound |
| CN107312946A (en) * | 2017-05-15 | 2017-11-03 | 天能电池(芜湖)有限公司 | A kind of battery grid lead liquid of processing subtracts slag agent prescription |
| CN111154984A (en) * | 2020-01-19 | 2020-05-15 | 河南豫光金铅股份有限公司 | Method for separating lead, arsenic and copper from high-lead high-arsenic copper slag |
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| JP2009209405A (en) * | 2008-03-04 | 2009-09-17 | Sumitomo Metal Mining Co Ltd | Method for smelting copper-containing dross |
| CN102312097A (en) * | 2011-09-30 | 2012-01-11 | 广州有色金属研究院 | Method for preparing babbitt alloy from residue containing silver of copper anode slime |
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| CN102747231A (en) * | 2012-07-06 | 2012-10-24 | 赵志强 | Method for treating copper dross by induction electric furnace |
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2013
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105543493A (en) * | 2015-12-25 | 2016-05-04 | 西部矿业股份有限公司 | Lead dross treatment method |
| CN106282659A (en) * | 2016-08-21 | 2017-01-04 | 株洲冶炼集团股份有限公司 | A kind of lead smelting removes antimony agent and except antimony technique with compound |
| CN107312946A (en) * | 2017-05-15 | 2017-11-03 | 天能电池(芜湖)有限公司 | A kind of battery grid lead liquid of processing subtracts slag agent prescription |
| CN107312946B (en) * | 2017-05-15 | 2019-01-25 | 天能电池(芜湖)有限公司 | A kind of processing battery grid lead liquid subtracts slag agent prescription |
| CN111154984A (en) * | 2020-01-19 | 2020-05-15 | 河南豫光金铅股份有限公司 | Method for separating lead, arsenic and copper from high-lead high-arsenic copper slag |
| CN111154984B (en) * | 2020-01-19 | 2022-03-15 | 河南豫光金铅股份有限公司 | Method for separating lead, arsenic and copper from high-lead high-arsenic copper slag |
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Application publication date: 20140319 |