CN108456778B - Method for preparing gold-silver alloy from rich lead - Google Patents
Method for preparing gold-silver alloy from rich lead Download PDFInfo
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- CN108456778B CN108456778B CN201810258783.1A CN201810258783A CN108456778B CN 108456778 B CN108456778 B CN 108456778B CN 201810258783 A CN201810258783 A CN 201810258783A CN 108456778 B CN108456778 B CN 108456778B
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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
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/16—Dry methods smelting of sulfides or formation of mattes with volatilisation or condensation of the metal being produced
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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
- C22B11/00—Obtaining noble metals
- C22B11/02—Obtaining noble metals by dry processes
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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
- C22B13/00—Obtaining lead
- C22B13/02—Obtaining lead by dry processes
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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
- C22B30/00—Obtaining antimony, arsenic or bismuth
- C22B30/02—Obtaining antimony
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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
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/18—Reducing step-by-step
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Abstract
The invention discloses a method for preparing gold-silver alloy from noble lead, which comprises the steps of adding the noble lead obtained from an antimony smelting production line into a lead smelting furnace, reducing the copper content in the noble lead to be below 0.5% by adopting a liquation method and a sulfur-adding copper-removing method, then adding the noble lead into a vacuum furnace, raising the temperature to a certain temperature in a vacuum state, and separating lead, antimony and gold and silver to obtain high-grade gold-silver alloy, wherein the silver content in the produced crude lead is less than 200g/t, and the ratio of the sum of the gold and silver contents is more than 60%. The method is environment-friendly and efficient, not only improves economic benefits, but also fills up technical blank of the industry, and promotes the development of the industry.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the technical field of metal smelting, and particularly relates to a method for preparing gold-silver alloy from rich lead.
[ background of the invention ]
In the traditional antimony smelting process by a pyrogenic process, gold, silver and precious metals are produced in the form of precious antimony when antimony ores containing gold and silver are treated. In order to improve the value, the precious antimony can be enriched with gold and silver in a reverberatory furnace to obtain the precious antimony. The content of rich and noble antimony can reach more than 50%, but the antimony has a lower valuation coefficient than the normal valuation coefficient, which is not beneficial to improving the recovery rate of antimony, so that the antimony is recovered by a method of enriching gold and silver with lead, and the gold and silver are enriched in the rich and noble lead. Although the valuation coefficient of gold and silver in the noble lead is improved to a certain extent relative to that of the noble antimony, the improvement is not large, and the noble lead has a single component. Therefore, it is necessary to separate the precious lead to produce high-grade gold-silver alloy.
[ summary of the invention ]
The invention aims to provide a method for preparing gold-silver alloy from rich lead, which comprises the steps of sequentially adding the rich lead into a lead melting furnace and a vacuum furnace for operation, and removing impurities by a liquation method and a sulfur-adding copper-removing method, so that high-grade gold-silver alloy is prepared, and the method is environment-friendly and efficient.
The technical scheme adopted by the invention is as follows: a method for preparing gold-silver alloy from noble lead comprises the following steps:
(1) putting a precious lead-rich raw material into a lead melting furnace, heating to 600 ℃, fishing out the melting slag, fishing out the first copper dross removal slag when the temperature is reduced to 500 ℃, and fishing out the second copper dross removal slag when the temperature is reduced to 350 ℃;
(2) controlling the temperature to be 280-330 ℃, adding sulfur while stirring, stopping stirring after 5-10 min, and fishing out copper sulfide scum under the condition of not heating;
(3) heating to 620-680 ℃ after slag is fished, blowing compressed air to enable sulfur to be oxidized into sulfur dioxide to escape and volatilize, and putting the sulfur into a furnace to obtain lead rich in copper after copper is removed;
(4) and adding the copper-removed noble lead into a vacuum furnace, heating to 700-800 ℃ in a vacuum state, volatilizing antimony and lead, condensing into crude lead, and feeding gold and silver into a silver collecting bin to obtain gold-silver alloy.
Preferably, the precious lead-rich raw material is obtained from an antimony smelting production line, and comprises the following main chemical components, by weight, Sb 1-5%, Pb 90-95%, Cu 2-6%, Au content of 1000-4000 g/t, and Ag content of 4000-10000 g/t.
Preferably, the sulphur is added in an amount of 30% excess, calculated as the sulphur required to react with copper to form cuprous sulphide.
Preferably, the copper content of the lead-rich alloy after copper removal is 0.5% or less.
Preferably, the vacuum degree of the vacuum furnace is 10-15 Pa.
Preferably, the content of silver in the crude lead is less than 200g/t, and the proportion of the sum of the contents of gold and silver in the gold-silver alloy is more than 60%.
By adopting the technical scheme, the invention has the beneficial effects that: the method comprises the steps of adding precious lead obtained from an antimony smelting production line into a lead melting furnace and a vacuum furnace, and carrying out heating, copper removal, lead removal and other processes to obtain a high-grade gold-silver alloy, wherein the content of silver in the produced crude lead is less than 200g/t, and the ratio of the sum of the contents of gold and silver is more than 60%; the method is environment-friendly and efficient, 5t of rich and precious lead can be treated in one day, the economic benefit is improved, the technical blank of the industry is filled, and the industry development is promoted.
[ detailed description ] embodiments
The following examples and test examples may help one skilled in the art to more fully understand the present invention, but are not intended to limit the invention in any way.
Example 1
The main chemical components of the treated rich lead raw material in percentage by weight are as follows: sb2.5%, Pb92.53%, Cu3.85%, Fe0.002%, Au content 2485.65g/t, Ag content 4800.5g/t, through the following steps:
(1) putting a precious lead-rich raw material into a lead melting furnace, heating to 600 ℃, fishing out the melting slag, fishing out the first copper dross removal slag when the temperature is reduced to 500 ℃, and fishing out the second copper dross removal slag when the temperature is reduced to 350 ℃;
(2) controlling the temperature to be 280-330 ℃, adding sulfur while stirring, stopping stirring after 5-10 min, and fishing out copper sulfide scum under the condition of not heating; the addition of the sulfur is calculated according to the sulfur required by the reaction of the sulfur and the copper to form cuprous sulfide, and the sulfur is excessive by 30 percent;
(3) heating to 620-680 ℃ after slag removal, blowing compressed air to oxidize sulfur into sulfur dioxide, escaping and volatilizing, and putting into a furnace to obtain copper-removed noble lead, wherein the copper content of the copper-removed noble lead is below 0.5%;
(4) and adding the copper-removed noble lead into a vacuum furnace, keeping the vacuum degree at 10-15 Pa, heating to 700-800 ℃, volatilizing antimony and lead, condensing into crude lead, and feeding gold and silver into a cash register to obtain gold-silver alloy.
The content of silver in the produced crude lead is less than 200g/t, and the weight percentage of the main chemical components of the gold-silver alloy is as follows: sb0.8%, Au20.48%, Ag40.95%, Pb0.5%, Cu37.05%, Fe0.17%, the ratio of the sum of the contents of gold and silver is more than 60%. The gold-silver alloy can be sold directly or pure gold and pure silver can be further extracted, the sales coefficient of the gold and the silver is high, and copper can also be priced.
Example 2
The main chemical components of the treated rich lead raw material in percentage by weight are as follows: sb1.82%, Pb94.1%, Cu2.85%, Fe0.003%, Au content of 3582.65g/t and Ag content of 7542.8g/t, and the method comprises the following steps:
(1) putting a precious lead-rich raw material into a lead melting furnace, heating to 600 ℃, fishing out the melting slag, fishing out the first copper dross removal slag when the temperature is reduced to 500 ℃, and fishing out the second copper dross removal slag when the temperature is reduced to 350 ℃;
(2) controlling the temperature to be 280-330 ℃, adding sulfur while stirring, stopping stirring after 5-10 min, and fishing out copper sulfide scum under the condition of not heating; the addition of the sulfur is calculated according to the sulfur required by the reaction of the sulfur and the copper to form cuprous sulfide, and the sulfur is excessive by 30 percent;
(3) heating to 620-680 ℃ after slag removal, blowing compressed air to oxidize sulfur into sulfur dioxide, escaping and volatilizing, and putting into a furnace to obtain copper-removed noble lead, wherein the copper content of the copper-removed noble lead is below 0.5%;
(4) and adding the copper-removed noble lead into a vacuum furnace, keeping the vacuum degree at 10-15 Pa, heating to 700-800 ℃, volatilizing antimony and lead, condensing into crude lead, and feeding gold and silver into a cash register to obtain gold-silver alloy.
The content of silver in the produced crude lead is less than 200g/t, and the weight percentage of the main chemical components of the gold-silver alloy is as follows: sb0.85%, Au23.2%, Ag49.5%, Pb0.62%, Cu25.6%, Fe0.2%, and the ratio of the sum of the contents of gold and silver is more than 60%. The gold-silver alloy can be sold directly or pure gold and pure silver can be further extracted, the sales coefficient of the gold and the silver is high, and copper can also be priced.
Example 3
The main chemical components of the treated rich lead raw material in percentage by weight are as follows: sb1.55%, Pb93.8%, Cu3.01%, Fe0.002%, Au content 2780.65g/t, Ag content 6950.63g/t, through the following steps:
(1) putting a precious lead-rich raw material into a lead melting furnace, heating to 600 ℃, fishing out the melting slag, fishing out the first copper dross removal slag when the temperature is reduced to 500 ℃, and fishing out the second copper dross removal slag when the temperature is reduced to 350 ℃;
(2) controlling the temperature to be 280-330 ℃, adding sulfur while stirring, stopping stirring after 5-10 min, and fishing out copper sulfide scum under the condition of not heating; the addition of the sulfur is calculated according to the sulfur required by the reaction of the sulfur and the copper to form cuprous sulfide, and the sulfur is excessive by 30 percent;
(3) heating to 620-680 ℃ after slag removal, blowing compressed air to oxidize sulfur into sulfur dioxide, escaping and volatilizing, and putting into a furnace to obtain copper-removed noble lead, wherein the copper content of the copper-removed noble lead is below 0.5%;
(4) and adding the copper-removed noble lead into a vacuum furnace, keeping the vacuum degree at 10-15 Pa, heating to 700-800 ℃, volatilizing antimony and lead, condensing into crude lead, and feeding gold and silver into a cash register to obtain gold-silver alloy.
The content of silver in the produced crude lead is less than 200g/t, and the weight percentage of the main chemical components of the gold-silver alloy is as follows: sb0.82%, Au20.69%, Ag47.08%, Pb0.48%, Cu30.66%, Fe0.25%, and the ratio of the sum of the contents of gold and silver is more than 60%. The gold-silver alloy can be sold directly or pure gold and pure silver can be further extracted, the sales coefficient of the gold and the silver is high, and copper can also be priced.
Claims (5)
1. A method for preparing gold-silver alloy from noble lead is characterized by comprising the following steps:
(1) putting a precious lead-rich raw material into a lead smelting furnace, heating to 600 ℃, fishing out the molten slag, fishing out the first copper dross removal slag when the temperature is reduced to 500 ℃, and fishing out the second copper dross removal slag when the temperature is reduced to 350 ℃, wherein the precious lead-rich raw material is obtained from an antimony smelting production line, and comprises the following main chemical components in percentage by weight of Sb 1-5%, Pb 90-95%, Cu 2-6%, Au content of 1000-4000 g/t, and Ag content of 4000-10000 g/t;
(2) controlling the temperature to be 280-330 ℃, adding sulfur while stirring, stopping stirring after 5-10 min, and fishing out copper sulfide scum under the condition of not heating;
(3) heating to 620-680 ℃ after slag is fished, blowing compressed air to enable sulfur to be oxidized into sulfur dioxide to escape and volatilize, and putting the sulfur into a furnace to obtain lead rich in copper after copper is removed;
(4) and adding the copper-removed noble lead into a vacuum furnace, heating to 700-800 ℃ in a vacuum state, volatilizing antimony and lead, condensing into crude lead, and feeding gold and silver into a silver collecting bin to obtain gold-silver alloy.
2. The method of claim 1, wherein the sulfur is added in an amount of 30% excess, based on the amount of sulfur required to react with copper to form cuprous sulfide.
3. The method of claim 1, wherein the copper content of the lead after copper removal is less than 0.5%.
4. The method for preparing gold-silver alloy from noble lead according to claim 1, wherein the vacuum degree of the vacuum furnace is 10-15 Pa.
5. The method for preparing gold-silver alloy from noble lead according to claim 1, wherein the content of silver in the crude lead is less than 200g/t, and the ratio of the sum of the contents of gold and silver in the gold-silver alloy is more than 60%.
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| CN110184473A (en) * | 2019-05-31 | 2019-08-30 | 郴州融源环保科技股份有限公司 | A kind of new-type Decoppering in lead bullion detinning method |
Citations (5)
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|---|---|---|---|---|
| CN102168179A (en) * | 2011-04-07 | 2011-08-31 | 赵志强 | Technology for producing Au and Ag from precious Pb by vacuum distillation |
| CN104120273A (en) * | 2014-07-28 | 2014-10-29 | 蒙自矿冶有限责任公司 | Method for recycling lead, sliver and copper by taking noble lead as raw material |
| CN104141057A (en) * | 2014-07-28 | 2014-11-12 | 蒙自矿冶有限责任公司 | Method for recycling bismuth in bullion lead |
| CN106244824A (en) * | 2016-08-24 | 2016-12-21 | 安徽省陶庄湖废弃物处置有限公司 | Reviver pyrogenic process basic refining bottom blowing process method |
| CN107604171A (en) * | 2017-08-25 | 2018-01-19 | 金川集团股份有限公司 | A kind of method of the melting enriching noble metals from complicated high content of nickel copper anode mud leached mud |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3117015A4 (en) * | 2014-03-13 | 2017-10-11 | Glencore Technology Pty Ltd. | Process for refining metals |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102168179A (en) * | 2011-04-07 | 2011-08-31 | 赵志强 | Technology for producing Au and Ag from precious Pb by vacuum distillation |
| CN104120273A (en) * | 2014-07-28 | 2014-10-29 | 蒙自矿冶有限责任公司 | Method for recycling lead, sliver and copper by taking noble lead as raw material |
| CN104141057A (en) * | 2014-07-28 | 2014-11-12 | 蒙自矿冶有限责任公司 | Method for recycling bismuth in bullion lead |
| CN106244824A (en) * | 2016-08-24 | 2016-12-21 | 安徽省陶庄湖废弃物处置有限公司 | Reviver pyrogenic process basic refining bottom blowing process method |
| CN107604171A (en) * | 2017-08-25 | 2018-01-19 | 金川集团股份有限公司 | A kind of method of the melting enriching noble metals from complicated high content of nickel copper anode mud leached mud |
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Effective date of registration: 20201130 Address after: 533601 Youjiang smelter, Napo Town, Tianyang County, Baise City, Guangxi Zhuang Autonomous Region Patentee after: Guangxi wanshizhi rare precious metal Technology Co.,Ltd. Address before: 510000 Guangzhou, Guangdong, Huangpu District, 319, 2612, 2613, 2614, only for office use. Patentee before: GUANGZHOU WANSHIZHI INVESTMENT Co.,Ltd. |
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Denomination of invention: A method for preparing gold silver alloy from rich lead Effective date of registration: 20211216 Granted publication date: 20191231 Pledgee: Guangxi Beibu Gulf Bank Co.,Ltd. Baise branch Pledgor: Guangxi wanshizhi rare precious metal Technology Co.,Ltd. Registration number: Y2021450000063 |