CN1295135A - Dearsenicating method during smelting lead-antimony alloy - Google Patents
Dearsenicating method during smelting lead-antimony alloy Download PDFInfo
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- CN1295135A CN1295135A CN 00121824 CN00121824A CN1295135A CN 1295135 A CN1295135 A CN 1295135A CN 00121824 CN00121824 CN 00121824 CN 00121824 A CN00121824 A CN 00121824A CN 1295135 A CN1295135 A CN 1295135A
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Abstract
Impurity-containing lead-antimony is heated and molten in metal crucible and under stirring, sodium hydroxide or sodium carbonate as dearsenicating agent is added to the molten metal so that arsenic is reacted to form floated sodium arsenate dregs and the floated dregs are separated to obtain lead-antimony alloy. Compared with prior art, the present invention is simple, high in efficiency and high in yield.
Description
The utility model relates to a non-ferrous metal smelting technology, in particular to a method for smelting lead-antimony alloy containing arsenic.
In the production process of antimony white, impurities in lead-antimony alloy containing impurities obtained by smelting need to be removed, and particularly arsenic in the lead-antimony alloy needs to be removed. In the prior art, the process for removing arsenic from lead-antimony alloy is completed in a plurality of furnaces and a plurality of processes, and the arsenic removal process adopted by the applicant is completed in two reverberatory furnaces, and the process has the following defects: firstly, the working procedures are excessive and complicated, and the equipment investment is high; secondly, after antimony oxide is reduced, alkali is used for removing arsenic, so that the direct yield of antimony is reduced; thirdly, if the technique for producing the antimony white by adopting the lead-antimony alloy is adopted, the separated metal lead and the metal antimony need to be re-fused, so that the whole technique for producing the antimony white is more complicated and has low efficiency.
The invention aims to provide the arsenic removal process method for smelting the lead-antimony alloy containing impurities, which has the advantages of simple process, small equipment investment and high production efficiency.
In order to realize the purpose, the process method adopted by the invention is as follows: putting the lead-antimony alloy containing impurities into a metal pot for heating and melting, adding an arsenic removal agent into the molten metal under the stirring condition to react arsenic to form sodium arsenate scum, and separating the scum from the lead-antimony metal liquid to obtain the lead-antimony alloy.
In the scheme, when the arsenicremoval agent is added, the technical process can be accelerated by adding the oxidant; the temperature can be controlled at 400-650 ℃, and preferably the temperature is decreased from high to low within the range of 400-650 ℃; in addition, an oxidizing gas may be bubbled into the molten metal in the above process.
The arsenic removing agent is any one of sodium hydroxide and sodium carbonate or a mixture of the sodium hydroxide and the sodium carbonate, and sodium chloride can be added into the arsenic removing agent to play a synergistic effect. The above-mentioned oxidizer means any one compound of potassium nitrate, sodium nitrate and ammonium nitrate, or a mixture of any two compounds thereof, or a mixture of three compounds thereof.
The chemical reactions that can take place are:
from the above reaction, even a small amount of antimony forms sodium antimonate (Na)3SbO4) Slag-like compounds which are also rapidly replaced by arsenic to form sodium arsenate (Na)3AsO4) And metallic antimony, the loss of antimony in the form of slag compounds is very small.
Due to the adoption of the scheme, compared with the prior art, the invention has the following beneficial effects:
1. the process is simple, the working procedures are few, the process requirement is low, and the labor productivity is improved.
2. The occupied area is small, and the equipment investment is low.
3. The yield of metal is high. Because a plurality of working procedures are saved, the yield loss of each working procedure is avoided; in the production, because little lead and antimony enter the arsenic slag, the direct yield of the lead and the antimony is greatly improved.
The invention is further illustrated by the following process and examples in conjunction with the accompanying drawings:
FIG. 1 is a process flow diagram of a prior art process employed by the applicant.
FIG. 2 is a process flow diagram of the process of the present invention.
In the process shown in FIG. 1: the first step is that the crude lead-antimony alloy containing impurities is put into a reverberatory furnace to be heated and melted, the temperature is raised to 700-800 ℃, oxygen is blown by air blast, the impurities are removed in the form of scum, antimony in the crude lead-antimony alloy is generated into powder antimony oxide, the powder antimony oxide is collected by a dust collector, at the moment, arsenic is also formed into powder arsenic oxide to be mixed in the powder antimony oxide to form antimony oxide containing arsenic, and meanwhile, refined lead metal is left in the reverberatory furnace; secondly, putting the powdery antimony oxide containing arsenic into a second reverberatory furnace with carbon added, heating to 800-900 ℃ to reduce the arsenic oxide and the antimony oxide into antimony metal containing arsenic, namely crude antimony containing arsenic; and thirdly, adding sodium carbonate into the molten crude antimony containing arsenic to separate arsenic from antimony metal in the form of scum sodium arsenate to obtain refined antimony with qualified arsenic content. The process has many working procedures and large equipment investment, and the recovery rate of antimony is not high after recovery of a dust collector and the like.
In the process shown in fig. 2: the refined antimony with qualified arsenic content is obtained by charging crude lead-antimony alloy containing impurities into a steel pot, heating to melt, heating to 600 deg.C, blowing oxygen into molten metal liquid, stirring with a stirrer to chemically react the impurities in the molten metal, such as iron, copper, tin, indium and part of arsenic, to generate scum-like substances, removing the scum, and then adding arsenic removal agent while stirring, or adding oxidant to separate arsenic from antimony metal in the form of scum-like sodium arsenate. The examples of smelting in 10-ton and 20-ton furnaces according to the process are as follows:
example 1:
10 tons of lead-antimony alloy (Pb: 58%, Sb: 37%, Fe: 1.2%, As: 1.15%, Cu: 0.4%, Sn: 0.5%, and In: 0.05%) is charged into a steel casting pot, heated to melt, heated to 600 ℃, oxygen is blown into the molten metal liquid, the molten metal liquid is stirred by a stirrer to cause chemical reaction of impurities such As iron, copper, tin, indium, and part of arsenic In the molten metal and generate dross-like substances, the dross is removed, and an arsenic removal agent composed of sodium hydroxide and sodium chloride is added while stirring, and the arsenic removal agent is composed of sodium hydroxide and sodium chloride In a ratio of 10: 1 parts by weight. The arsenic removing agent adopts a method of adding for multiple times, scum is flooded out after each time of adding until the arsenic content in the sample is qualified by testing.
After the treatment by the above treatment process, 9.2 tons of lead-antimony alloy (Pb 59%, Sb 39.5%, Fe 0.004%, As 0.02%, Cu 0.015%, Sn 0.1%, In 0.01%) can be obtained.
Example two:
a cast steel pot was charged with 20 tons of lead-antimony alloy (Pb: 45%, Sb: 50%, Fe: 1.1%, As: 0.8%, Cu: 0.7%, Sn: 1.0%, In: 0.07%), heated to melt, heated to 650 ℃, blown with air to the molten metal, stirred with a stirrer to cause chemical reaction of impurities such As iron, copper, tin, indium and part of arsenic In the molten metal and produce dross-like substances, and then, after removing these dross, a mixture of an arsenic removal agent comprising sodium hydroxide and sodium chloride and an oxidizing agent comprising sodium nitrate was added while stirring, the mixture comprising sodium hydroxide, sodium chloride and sodium nitrate In a ratio of 10: 1: 0.5 parts by weight. The mixture is added for multiple times, and scum is waterlogged out after each addition until the arsenic content in the mixture is qualified after sampling and testing.
After the treatment by the above treatment process, 18.5 tons of Pb-Sb alloy (Pb: 46%, Sb: 52.5%, Fe: 0.003%, As: 0.01%, Cu: 0.01%, Sn: 0.2%, and In: 0.005%) can be obtained.
Claims (4)
1. A method for removing arsenic in lead-antimony alloy smelting is characterized by comprising the following steps: putting the lead-antimony alloy containing impurities into a metal pot for heating and melting, adding an arsenic removal agent into the molten metal under the stirring condition, reacting arsenic to form sodium arsenate scum, and separating the scum from the lead-antimony metal liquid to obtain the lead-antimony alloy.
2. The arsenic removal method for lead-antimony alloy smelting according to claim 1, wherein the arsenic removal method comprises the following steps: when the arsenic removing agent is added, the oxidant is added, and the temperature is controlled at 400-650 ℃.
3. The arsenic removal method for lead-antimony alloy smelting according to claim 2, characterized in that: when the arsenic removing agent is added for removing arsenic, the temperature is controlled to be reduced from high to low within the range of 400-650 ℃ in the whole arsenic removing process.
4. The arsenic removal method for lead-antimony alloy smelting according to claim 1, 2 or 3, wherein: an oxidizing gas is bubbled through the molten metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001218247A CN1142300C (en) | 2000-07-14 | 2000-07-14 | Dearsenicating method during smelting lead-antimony alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001218247A CN1142300C (en) | 2000-07-14 | 2000-07-14 | Dearsenicating method during smelting lead-antimony alloy |
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| Publication Number | Publication Date |
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| CN1295135A true CN1295135A (en) | 2001-05-16 |
| CN1142300C CN1142300C (en) | 2004-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB001218247A Expired - Fee Related CN1142300C (en) | 2000-07-14 | 2000-07-14 | Dearsenicating method during smelting lead-antimony alloy |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103526049A (en) * | 2013-10-30 | 2014-01-22 | 四川鑫龙碲业科技开发有限责任公司 | Arsenic removal method used in pyrometallurgucal process for antimony |
| CN104789786A (en) * | 2015-04-01 | 2015-07-22 | 郴州雄风环保科技有限公司 | Method for harmlessly treating arsenic-containing waste slag and comprehensively recycling valuable metals in arsenic-containing waste slag |
| CN105018757A (en) * | 2015-06-30 | 2015-11-04 | 厦门大学 | Metal melting protective agent and preparation method and application thereof |
| CN106086461A (en) * | 2016-08-18 | 2016-11-09 | 紫金矿业集团股份有限公司 | A kind of method of Copper making process slag making arsenic removal |
| CN106086446A (en) * | 2016-08-24 | 2016-11-09 | 北京矿冶研究总院 | Method for removing arsenic from metal or alloy |
| CN106629633A (en) * | 2016-12-27 | 2017-05-10 | 郴州市金贵银业股份有限公司 | Method for refining and removing arsenic from precipitated tellurium |
| CN112048736A (en) * | 2020-09-03 | 2020-12-08 | 武汉拓材科技有限公司 | Method for preparing high-density rod-shaped antimony |
| CN113302325A (en) * | 2019-01-30 | 2021-08-24 | 梅塔洛比利时公司 | Improved high purity lead production process |
-
2000
- 2000-07-14 CN CNB001218247A patent/CN1142300C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103526049A (en) * | 2013-10-30 | 2014-01-22 | 四川鑫龙碲业科技开发有限责任公司 | Arsenic removal method used in pyrometallurgucal process for antimony |
| CN104789786A (en) * | 2015-04-01 | 2015-07-22 | 郴州雄风环保科技有限公司 | Method for harmlessly treating arsenic-containing waste slag and comprehensively recycling valuable metals in arsenic-containing waste slag |
| CN104789786B (en) * | 2015-04-01 | 2017-03-15 | 郴州雄风环保科技有限公司 | A kind of harmlessness disposing arsenic-containing waste residue and the method for synthetical recovery wherein valuable metal |
| CN105018757A (en) * | 2015-06-30 | 2015-11-04 | 厦门大学 | Metal melting protective agent and preparation method and application thereof |
| CN105018757B (en) * | 2015-06-30 | 2017-12-22 | 福建省闽华电源股份有限公司 | A kind of metal melting protective agent and its preparation method and application |
| CN106086461A (en) * | 2016-08-18 | 2016-11-09 | 紫金矿业集团股份有限公司 | A kind of method of Copper making process slag making arsenic removal |
| CN106086446A (en) * | 2016-08-24 | 2016-11-09 | 北京矿冶研究总院 | Method for removing arsenic from metal or alloy |
| CN106629633A (en) * | 2016-12-27 | 2017-05-10 | 郴州市金贵银业股份有限公司 | Method for refining and removing arsenic from precipitated tellurium |
| CN113302325A (en) * | 2019-01-30 | 2021-08-24 | 梅塔洛比利时公司 | Improved high purity lead production process |
| CN113302325B (en) * | 2019-01-30 | 2023-06-23 | 梅塔洛比利时公司 | Improved high purity lead production method |
| CN112048736A (en) * | 2020-09-03 | 2020-12-08 | 武汉拓材科技有限公司 | Method for preparing high-density rod-shaped antimony |
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| Publication number | Publication date |
|---|---|
| CN1142300C (en) | 2004-03-17 |
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