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Method for separating and purifying tellurium from cuprous telluride slag through vacuum distillation

A technology of cuprous telluride slag and cuprous telluride, which is applied in the field of metallurgy, can solve the problems of low direct yield and long process flow of cuprous telluride slag treatment process, and achieve directional separation and purification of valuable metals, process flow Short, stable effect

Inactive Publication Date: 2019-08-20
ZIJIN MINING GROUP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention aims to provide a method for separating and purifying tellurium from cuprous telluride slag by vacuum distillation, which can solve the problems of low direct yield and long process flow of the current cuprous telluride slag treatment process, and realize the tellurium Short-process and high-value recovery of valuable elements in cuprous slag

Method used

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  • Method for separating and purifying tellurium from cuprous telluride slag through vacuum distillation
  • Method for separating and purifying tellurium from cuprous telluride slag through vacuum distillation
  • Method for separating and purifying tellurium from cuprous telluride slag through vacuum distillation

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Embodiment 1

[0029] This embodiment provides a method for separating and purifying tellurium from cuprous telluride slag by vacuum distillation, as shown in Figure 1, specifically:

[0030] Take 10kg of cuprous telluride slag containing 31.07% copper, 28.55% tellurium, 3.8% selenium, 1160.83g / t silver, and 25.87g / t gold, and place it in a vacuum distillation furnace at a vacuum degree of 40-60Pa and a temperature of Under the condition of 400°C, vacuum distillation for 3 hours produces selenium slag and copper tellurium slag. Put the copper-tellurium slag in a vacuum distillation furnace, and vacuum distill it again for 3 hours under the conditions of a vacuum degree of 30-50Pa and a temperature of 900°C to produce refined tellurium products and copper-silver slag.

[0031] The selenium slag is returned to the Venturi mud treatment process, and is reduced by sodium sulfite after two-stage countercurrent alkali leaching to obtain crude selenium products. The copper and silver slag is retur...

Embodiment 2

[0033] This embodiment provides a method for separating and purifying tellurium by vacuum distillation of cuprous telluride slag, specifically:

[0034] Take 10kg of cuprous telluride slag containing 33.63% copper, 29.92% tellurium, 3.2% selenium, 1063.29g / t silver, and 20.32g / t gold, and place it in a vacuum distillation furnace at a vacuum degree of 40-60Pa and a temperature of Under the condition of 420°C, vacuum distillation for 3 hours produces selenium slag and copper tellurium slag. Place the copper tellurium slag in a vacuum distillation furnace, vacuum distillation for 3 hours under the condition of vacuum degree of 30-50Pa and temperature of 920°C to produce refined tellurium product and copper silver slag.

Embodiment 3

[0036] This embodiment provides a method for separating and purifying tellurium by vacuum distillation of cuprous telluride slag, specifically:

[0037] Take 10kg of cuprous telluride slag containing 33.63% copper, 29.92% tellurium, 3.2% selenium, 1063.29g / t silver, and 20.32g / t gold, and place it in a vacuum distillation furnace at a vacuum degree of 40-60Pa and a temperature of Under the condition of 470°C, vacuum distillation for 3 hours produces selenium slag and copper tellurium slag. Place the copper tellurium slag in a vacuum distillation furnace, vacuum distillation for 3 hours under the conditions of vacuum degree 30-50Pa and temperature 930°C to produce refined tellurium product and copper silver slag.

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Abstract

The invention discloses a method for separating and purifying tellurium from cuprous telluride slag through vacuum distillation. The method comprises the following steps of S1, placing the cuprous telluride slag in a vacuum distillation furnace, and performing vacuum distillation at the vacuum degree of 10-150 Pa to obtain selenium slag and copper-tellurium slag, wherein the vacuum distillation temperature is 390 DEG C-470 DEG C, and the time is 1-4 h; and S2, placing the copper-tellurium slag obtained in the S1 in the vacuum distillation furnace, and performing vacuum distillation at the vacuum degree of 10-150 Pa again to obtain refined tellurium products and copper-silver slag, where the secondary vacuum distillation temperature is 890 DEG C-950 DEG C, and the time is 1-4 h. According to the method, the problems of low direct recovery, long process flow and the like in the current cuprous telluride slag treatment process can be solved, and the short-process and high-value recovery of valuable elements in the cuprous telluride slag is achieved.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a method for efficiently separating and purifying valuable elements in cuprous telluride slag in a copper anode slime treatment process. Background technique [0002] Copper anode slime is rich in elements such as copper, selenium, tellurium, antimony, gold, silver and platinum group, and has great economic value. It is an important raw material for the production of precious metals such as gold, silver and platinum, and scattered metals such as selenium and tellurium. [0003] The treatment processes of copper anode slime mainly include pyrometallurgy, combined process of dressing and smelting, and full wet process. In the process of copper anode slime treatment, in order to improve the direct metal recovery rate, shorten the treatment process, reduce energy consumption and reduce environmental pollution, it is necessary to pre-treat the copper anode slime to remove impurities. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C01B19/02C22B15/00C22B11/02
CPCC01B19/02C22B7/001C22B11/023C22B15/0034C22B15/0056Y02P10/20
Inventor 衷水平陈杭吴星琳郑佳翔赵志强彭李张焕然王俊娥
Owner ZIJIN MINING GROUP
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