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Method for separating selenium, tellurium, arsenic, copper, lead and silver and enriching gold from copper anode mud

A copper anode slime and gold-enriching technology is applied in selenium/tellurium compounds, selenium/tellurium oxo-salts, chemical instruments and methods, etc., and can solve problems such as low recovery rate, poor comprehensive recovery effect, and environmental pollution. Achieve the effect of reducing treatment costs and reducing emissions

Active Publication Date: 2020-08-25
KUNMING BOREN PRECIOUS METALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] For this reason, the present invention provides a method for separating selenium, tellurium, arsenic, copper, lead, silver and enriching gold from copper anode slime, so as to solve the problems of high cost, single metal recovery and comprehensive recovery in existing methods for recovering metals from copper anode slime. Poor effect, low recovery rate, environmental pollution and other problems in the recycling process

Method used

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  • Method for separating selenium, tellurium, arsenic, copper, lead and silver and enriching gold from copper anode mud

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Embodiment 1-7

[0044] Embodiment 1-7 A process flow diagram of a method for separating selenium, tellurium, arsenic, copper, lead, silver and enriching gold from copper anode slime is as follows figure 1 shown.

Embodiment 1

[0046] A method for separating selenium, tellurium, arsenic, copper, lead, silver and enriching gold from copper anode slime, said method comprising the following steps:

[0047] S1, first low-temperature oxidative roasting of copper anode slime to obtain a roasted product, stirring and reacting the roasted product with sodium hydroxide solution, and then filtering to obtain selenium-tellurium-arsenic leaching solution and alkali leaching residue; the conditions for the low-temperature oxidation roasting are: in air Roasting under conditions, the roasting temperature is 300°C, the material layer thickness is 10mm, and the roasting time is 4h; the concentration of the sodium hydroxide solution is 20%, and the liquid-solid ratio of the sodium hydroxide solution to the roasted product is 5:1 , the reaction temperature between the sodium hydroxide solution and the roasted product is 75°C.

[0048] S2. After stirring and reacting the leaching solution with lime water, filter to obt...

Embodiment 2

[0055] A method for separating selenium, tellurium, arsenic, copper, lead, silver and enriching gold from copper anode slime, said method comprising the following steps:

[0056] S1, first low-temperature oxidative roasting of copper anode slime to obtain a roasted product, stirring and reacting the roasted product with sodium hydroxide solution, and then filtering to obtain selenium-tellurium-arsenic leaching solution and alkali leaching residue; the conditions for the low-temperature oxidation roasting are: in air Roasting under conditions, the roasting temperature is 250°C, the thickness of the material layer is 10mm, and the roasting time is 3h; the concentration of the sodium hydroxide solution is 15%, and the liquid-solid ratio of the sodium hydroxide solution to the roasted product is 4:1 , the reaction temperature between the sodium hydroxide solution and the calcined product is 80°C.

[0057] S2. After stirring and reacting the leaching solution with lime water, filte...

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Abstract

The invention discloses a method for separating selenium, tellurium, arsenic, copper, lead and silver and enriching gold from copper anode mud, and relates to the technical field of rare and preciousmetal metallurgy. The method comprises the following steps that roasted products obtained through low-temperature oxidization roasting of the copper anode mud and sodium hydroxide react to obtain selenium, tellurium and arsenic containing leaching liquor and alkaline leaching slag; the leaching liquor and whitewash react to obtain a selenium and tellurium containing solution and calcium arsenate slag; the alkaline leaching slag and sulfuric acid react to obtain copper sulfate and acid leaching slag; sulfuric acid and the selenium and tellurium containing solution react to obtain telluric acidand a selenium containing solution; the acid leaching slag and nitric acid react to obtain a silver nitrate solution and lead and gold slag; silver nitrate and hydrochloric acid react to obtain silverchloride and nitric acid; the lead and gold slag and a sodium carbonate solution react to obtain carbonization slag and a sodium sulfate solution; the carbonization slag and nitric acid react to obtain a lead nitrate solution and gold containing enrichment; and the lead nitrate solution and sulfuric acid react to obtain a lead sulfate and sulfuric acid solution. The method aims to solve the problems that existing methods for recycling metal from copper anode mud, the cost is high, recycled metal is single, and the comprehensive recovery effect is poor.

Description

technical field [0001] The invention relates to the technical field of rare metal metallurgy, in particular to a method for separating selenium, tellurium, arsenic, copper, lead, silver and enriching gold from copper anode slime. Background technique [0002] Copper anode slime is a by-product produced in the process of copper electrolytic refining, and the yield accounts for about 0.2%-0.8% of the refined copper output. Copper anode slime is rich in a large amount of gold, silver, selenium, tellurium, antimony, bismuth, platinum group Such rare elements and precious metals are important raw materials for extracting precious metals. [0003] The material composition of copper anode slime is relatively complex, and various metals exist in various forms, such as: the metal copper in copper anode slime is Cu 2 S, Cu 2 Se, Cu 2 Te forms and exists, and silver mainly forms Ag, Ag 2 Se, Ag 2 Te, AgCl, AgO and other forms exist. Gold generally exists in a free state, and it al...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B15/00C22B30/04C01B19/00C22B13/00C22B11/00
CPCC22B7/008C22B7/007C22B13/045C22B11/044C22B15/0071C22B30/04C01B19/00C01B19/008Y02P10/20
Inventor 李琰范兴祥付应斌吴娜毛莹博孙红燕李自静
Owner KUNMING BOREN PRECIOUS METALS
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