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A method for separating selenium, tellurium, arsenic, copper, lead, silver and enrichment of gold from copper anode slime

A copper anode slime and gold-enriching technology is applied in selenium/tellurium compounds, selenium/tellurium oxysalts, chemical instruments and methods, etc. It can solve the problems of low recovery rate, environmental pollution, and poor comprehensive recovery effect. Achieve the effects of reducing processing costs, increasing gold enrichment multiples, and significant emission reduction effects

Active Publication Date: 2022-08-02
KUNMING BOREN PRECIOUS METALS +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A method for separating selenium, tellurium, arsenic, copper, lead, silver and enrichment of gold from copper anode slime

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Embodiment 1-7

[0044] Embodiment 1-7 A kind of process flow chart of the method for separating selenium, tellurium, arsenic, copper, lead, silver and enrichment of gold from copper anode slime. figure 1 shown.

Embodiment 1

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

[0047] S1, first low-temperature oxidation roasting of copper anode slime obtains roasting product, and filtering obtains selenium-tellurium-arsenic leachate and alkali leaching residue after described roasting product and sodium hydroxide solution stirring reaction; The condition of described low-temperature oxidative roasting is: in air Roasting under conditions, the roasting temperature is 300 ℃, the thickness of the material layer 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 roasting product is 5:1 , the reaction temperature of the sodium hydroxide solution and the calcined product is 75°C.

[0048] S2, filter to obtain selenium-containing tellurium solution and calcium arsenate slag ...

Embodiment 2

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

[0056] S1, first low-temperature oxidation roasting of copper anode slime obtains roasting product, and filtering obtains selenium-tellurium-arsenic leachate and alkali leaching residue after described roasting product and sodium hydroxide solution stirring reaction; The condition of described low-temperature oxidative roasting is: 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 roasting product is 4:1 , the reaction temperature of the sodium hydroxide solution and the calcined product is 80 °C.

[0057] S2, filter to obtain selenium-containing tellurium solution and calcium arsenate sl...

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Abstract

The invention discloses a method for separating selenium, tellurium, arsenic, copper, lead, silver and enrichment of gold from copper anode slime, and relates to the technical field of rare and precious metal metallurgy. Sodium reacts to obtain selenium-tellurium-containing arsenic leaching solution and alkali leaching residue; the leaching solution reacts with lime water to obtain selenium-tellurium-containing solution and calcium arsenate residue; alkali leaching residue reacts with sulfuric acid to obtain copper sulfate and acid leaching residue; Reaction to obtain telluric acid and selenium-containing solution; react acid leaching residue with nitric acid to obtain silver nitrate solution and lead gold residue; react silver nitrate and hydrochloric acid to obtain silver chloride and nitric acid; react lead gold residue with sodium carbonate solution to obtain carbonized residue and sodium sulfate solution; react the carbonized slag with nitric acid to obtain lead nitrate solution and gold-containing enrichment; react lead nitrate solution with sulfuric acid to obtain lead sulfate and nitric acid solution. The purpose of the invention is to solve the problems of high cost, single recovered metal and poor comprehensive recovery effect in the existing method for recovering metal from copper anode slime.

Description

technical field [0001] The invention relates to the technical field of rare and precious metal metallurgy, in particular to a method for separating selenium, tellurium, arsenic, copper, lead, silver and 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 output of refined copper. Copper anode slime is rich in a large amount of gold, silver, selenium, tellurium, antimony, bismuth, platinum group It is an important raw material for extracting precious metals. [0003] The material composition of copper anode slime is relatively complex, and various metals exist in various forms, such as: copper in copper anode slime is composed of Cu 2 S, Cu 2 Se, Cu 2 Te forms and exists, and silver is mainly composed of Ag and Ag 2 Se, Ag 2 Te, AgCl, AgO and other forms exist, gold generally exists in a free state, and some are combined wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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