Process for comprehensively recovering high arsenic polymetallic material

A technology for polymetals and materials, applied in the field of comprehensive recovery process of high arsenic polymetallic materials, can solve the problems of low direct yield of valuable metals, arsenic pollution, and low comprehensive recovery rate, and achieve high comprehensive recovery rate, Low cost and the effect of eliminating blower equipment

Active Publication Date: 2012-03-28
郴州雄风环保科技有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a comprehensive recovery process for high-arsenic polymetallic materials, and at the s

Method used

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  • Process for comprehensively recovering high arsenic polymetallic material
  • Process for comprehensively recovering high arsenic polymetallic material

Examples

Experimental program
Comparison scheme
Effect test

experiment approach 1

[0030] （1） Take 500g of raw material and grind it finely, which contains 15.3% arsenic, 13.6% bismuth, 12.5% ​​copper, and 18.6% lead ；

[0031] (2) Add 150g of sodium hydroxide, 2000g of water, and 25g of hydrogen peroxide to the raw material, heat and stir for 3.5 hours, then filter to obtain 308.1g of dearsenic mud (containing 0.8% arsenic), 1930mL of leachate, the filtrate contains 38.25g / L of arsenic, and the arsenic is recovered The rate is 96.5%. Sodium arsenate is obtained after impurity removal and purification of the leaching solution.

[0032] (3) Heat and stir the arsenic-removed mud with 900g of water, 93g of sulfuric acid, 31g of hydrochloric acid, and 15g of hydrogen peroxide for 3.5 hours, then filter to obtain 203.5g of filter residue, which contains 45.1% lead and a lead recovery rate of 98.7%. Bismuth copper solution 983 mL.

[0033] (4) Add lye (containing 30% sodium hydroxide) to the bismuth-copper solution to adjust the pH to 2.5, and share 150g of lye...

experiment approach 2

[0036] (1) Take 10kg of raw material and grind it finely, which contains 19.8% arsenic, 15.2% bismuth, 16.3% copper, and 15.8% lead;

[0037] (2) Add 3kg of sodium hydroxide, 50kg of water, and 500g of hydrogen peroxide to the raw material, heat and stir for 3.5 hours, then filter to obtain 6.16kg of arsenic-free mud (containing 0.92% arsenic), 48.30L of leaching solution, and the filtrate contains 39.7g / L of arsenic. The recovery rate is 96.8%. Sodium arsenate is obtained after impurity removal and purification of the leaching solution.

[0038] (3) Heat and stir the arsenic-removed mud with 18.5kg of water, 1.8kg of sulfuric acid, 616g of hydrochloric acid, and 310g of hydrogen peroxide for 3.5 hours, then filter to obtain 4.12kg of filter residue, which contains 37.6% lead and a lead recovery rate of 98%. Bismuth copper solution 18.01L.

[0039] (4) Add lye (containing 30% sodium hydroxide) to the bismuth-copper solution to adjust the pH to 2.5, and share 1760g of lye to ...

experiment approach 3

[0042] （1） Take 500g of raw material and grind it finely, which contains 5.2% arsenic, 14.2% bismuth, 15.8% copper, and 20.5% lead ；

[0043] (2) Add 150g of sodium hydroxide, 2000g of water, and 10g of hydrogen peroxide to the raw material, heat and stir for 3.5 hours, then filter to obtain 314.2g of dearsenic mud (containing 0.7% arsenic), 1830mL of leachate, the filtrate contains 19.01g / L of arsenic, and the arsenic is recovered The rate was 97.1%; the leach solution was purified to obtain sodium arsenate.

[0044](3) Heat and stir the arsenic-removed mud with 900g of water, 94g of sulfuric acid, 31g of hydrochloric acid, and 20g of hydrogen peroxide for 3.5 hours, then filter to obtain 210.4g of filter residue, which contains 48% lead and a lead recovery rate of 98.9%. Bismuth copper solution 983 mL.

[0045] (4) Add lye (containing 30% sodium hydroxide) to the bismuth-copper solution to adjust the pH to 2.5, and share 144g of lye to remove lye; obtain 97.12g of bismuth...

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Abstract

The invention relates to a process for comprehensively recovering a high arsenic polymetallic material, which belongs to the non ferrous metal comprehensive recovery field. The process comprises the following steps: leaching arsenic in the polymetallic material from the polymetallic material by sodium hydroxide, hydrogen peroxide and water, routine purifying a leachate and removing impurities, crystallizing to obtain sodium arsenate; leaching the arsenic removal mud after removing arsenic by sulfuric acid, hydrochloric acid and hydrogen peroxide twice, sending leaching residue to a blast furnace for refining lead; adding alkali loquor in a leaching solution for regulating pH value to 2.0-2.5, depositing bismuth by a bismuth chlorine oxygen form, separating and depositing bismuth chlorine oxygen and refining to obtain the refined bismuth; adding iron powder in a solution which is performed bismuth deposition and separation, electrolyzing to obtain 1#copper; sending solution which is performed copper deposition and separation to a waste liquid recovery pool for processing. The invention has the advantages of low production cost, simple operation condition and requirement, safe operation and no arsenic pollution. According to the invention, the arsenic recovery rate is greater than or equal to 96.5%, the lead recovery rate is greater than or equal to 98%, the bismuth recovery rate is greater than or equal to 95.8% and the copper recovery rate is greater than or equal to 96.5%.

Description

technical field [0001] The invention belongs to the field of comprehensive recovery of nonferrous metals, in particular to a comprehensive recovery process for high-arsenic and multi-metal materials. Background technique [0002] Bismuth-containing polymetallic materials, such as lead anode slime, are important raw materials for non-ferrous metals and precious metals. Due to the extensive use of high-arsenic lead ores, the content of arsenic in bismuth-containing polymetallic materials is getting higher and higher. When the mass percentage of arsenic in bismuth-containing polymetallic materials is ≥5%, it is called high-arsenic polymetallic materials in the industry. Usually high-arsenic polymetallic materials are mixed with arsenic-free bismuth materials to reduce the arsenic content and then smelted in a reverberatory furnace. Such repeated closed-circuit circulation will only increase the amount of arsenic in the system, seriously pollute the environment and make the pro...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B3/04C22B15/00C22B30/06C22B30/04
CPCY02P10/20
Inventor 张二军谭雄玉曹孝义戴艳平
Owner 郴州雄风环保科技有限公司
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