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Method for recovering selenium, tellurium, copper and precious metal from copper anode slime

A technology for copper anode slime and selenium recovery, applied in the fields of tellurium, selenium recovery, copper and precious metals, can solve the problems of long process, high cost, large pollution, etc., and achieve the effects of simple process, low cost and environmental friendliness

Inactive Publication Date: 2019-02-22
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional process technology is mature, easy to control, and has a large processing capacity, but there are problems such as long process, low metal recovery rate, high energy consumption, large pollution, and high cost.

Method used

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  • Method for recovering selenium, tellurium, copper and precious metal from copper anode slime

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Sulfate and roast copper anode slime in a rotary kiln to obtain SeO-containing 2 The soot and calcined sand, copper anode slime and sulfuric acid (98%) are slurried in the stirring tank at a mass ratio of 1:1, and the slurried anode slime is evenly sent to the rotary through the feeder in the feeding tank Kiln, for roasting operation, the roasting temperature is 500 °C, the time is 4h, the obtained SeO-containing 2 The soot is absorbed by water into H 2 SeO 3 solution, which is then absorbed by the SO in the soot 2 The gas is reduced to elemental selenium, and crude selenium is obtained after drying (the purity of selenium is 90% to 99%). The crude selenium is purified by vacuum distillation to obtain refined selenium (the heating method of the vacuum furnace is indirect heating, and the furnace temperature of the vacuum furnace is 400°C, vacuum degree 100Pa, distillation time 2h) to obtain refined selenium, the purity of refined selenium was tested according to ...

Embodiment 2

[0028] (1) Sulfate and roast copper anode slime in a rotary kiln to obtain SeO-containing 2 The soot and calcined sand, copper anode slime and sulfuric acid (98%) are slurried in the stirring tank at a mass ratio of 1:1, and the slurried anode slime is evenly sent to the rotary through the feeder in the feeding tank Kiln, for roasting operation, the roasting temperature is 520 ° C, the time is 3h, the obtained SeO-containing 2 The soot is absorbed by water into H 2 SeO 3 , which is then absorbed by the SO in the soot 2 The gas is reduced to elemental selenium, and crude selenium (90% to 99%) is obtained after drying, and the crude selenium is purified by vacuum distillation (the heating method of the vacuum furnace is indirect heating, the furnace temperature of the vacuum furnace is 310°C, and the vacuum degree is 30Pa , distillation time 1.5h) to obtain refined selenium, according to the industry standard YS / T223-2007 to detect the purity of refined selenium, the final pu...

Embodiment 3

[0034] (1) Sulfate and roast copper anode slime in a rotary kiln to obtain SeO-containing 2 The soot and calcined sand, copper anode slime and sulfuric acid (98%) are slurried in the stirring tank at a mass ratio of 1:1, and the slurried anode slime is evenly sent to the rotary through the feeder in the feeding tank Kiln, for roasting operation, the roasting temperature is 550 °C, the time is 2.5h, the obtained SeO-containing 2 The soot is absorbed by water into H 2 SeO 3 solution, which is then absorbed by the SO in the soot 2 The gas is reduced to elemental selenium, and crude selenium (90% to 99%) is obtained after drying. The crude selenium is purified by vacuum distillation to obtain refined selenium (the heating method of the vacuum furnace is indirect heating, and the furnace temperature of the vacuum furnace is 240 ° C. The concentration is 10Pa, the distillation time is 1h) to obtain refined selenium, and the purity of refined selenium is detected according to the ...

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Abstract

The invention discloses a method for recovering selenium, tellurium, copper and precious metal from copper anode slime. The copper anode slime is subjected to segment treatment, the copper anode slimeis subjected to sulfation roasting at first, mixed gas of SeO2, SO2, SO3 and other gases and a roasted product are obtained, the obtained mixed gas is subjected to absorption reduction and dried, crude selenium is obtained, then the crude selenium is put in a vacuum distillation furnace, and refined selenium is obtained through purification; the roasted product obtained through sulfation roastingis subjected to oxygen pressure acid leaching, and leachate containing copper and tellurium and lead anode slime without selenium, copper and tellurium are obtained; the leachate containing copper and tellurium is subjected to copper powder reduction treatment, and copper-tellurium slag and a copper sulfate solution are obtained after reaction, so that copper and tellurium are convenient to recover; and the lead anode slime without selenium and copper is subjected to reduction smelting, noble lead alloy is obtained and put in a continuous vacuum distillation furnace, volatile lead and volatile bismuth are changed into volatile phases, thus, high-grade lead is recovered, non-volatile metal such as gold, silver, copper, antimony and arsenic remains in residues, and alloy is formed, so thatrecovery of subsequent precious metal is facilitated. Through the method provided by the invention, the refined selenium with the purity being 99.9%-99.99%, the copper sulfate solution, the copper-tellurium slag, the lead bismuth alloy and silver antimony gold copper arsenic alloy can be obtained.

Description

technical field [0001] The invention relates to a method for recovering selenium, tellurium, copper and precious metals from copper anode slime, belonging to the technical field of copper anode slime treatment. technical background [0002] Copper anode slime is a smelting by-product produced in the copper electrolytic refining process, and its components mostly exist in the form of metals, sulfides, selenium tellurium compounds, oxides, elemental sulfur and complex basic salts. It is an important raw material for comprehensive recovery of copper smelting enterprises, and has a great impact on the economic benefits of enterprises. Copper anode slime is rich in precious metals such as gold, silver, platinum and palladium, rare metals such as selenium and tellurium, and base metals such as copper and lead. [0003] There are three main types of traditional copper anode slime treatment processes at home and abroad: one is the traditional pyrotechnic process; the other is the s...

Claims

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Application Information

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IPC IPC(8): C22B1/06C01B19/02C22B7/00C22B15/00C22B13/02C22B13/00C22B30/06C22B30/02C22B30/04C22B11/02C22B11/00
CPCC22B1/06C22B7/001C22B7/007C22B11/021C22B11/042C22B13/025C22B13/045C22B15/0067C22B30/02C22B30/04C22B30/06C01B19/02Y02P10/20
Inventor 蒋文龙杨斌查国正刘大春徐宝强陈秀敏李一夫郁青春杨红卫田阳邓勇王飞熊恒杨佳曲涛孔令鑫郭新宇邓聚海黄大鑫周毅
Owner KUNMING UNIV OF SCI & TECH
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