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A method for deep tin removal in tellurium-containing solution

A solution and deep technology, applied in the direction of element selenium/tellurium, etc., can solve the problems of solid-liquid sedimentation and separation difficulties, decreased utilization rate of tellurium, underutilization of tellurium resources, etc.

Active Publication Date: 2018-05-01
JIANGXI COPPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the tin content in the tellurium electrolyte increases, it will be difficult to separate the solid and liquid during liquid formation. At the same time, the anode slime will stick to the tank wall and the plate during the electrolysis process, resulting in a decrease in the utilization rate of tellurium and insufficient utilization of tellurium resources.

Method used

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  • A method for deep tin removal in tellurium-containing solution

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Effect test

Embodiment 1

[0014] The tellurium-containing liquid produced in copper smelting enterprises also contains a certain amount of tin. During the process of directly entering the tellurium production line to recover tellurium, the content of tin impurities in the tellurium electrolyte will increase, making it difficult to settle and separate the solid and liquid during liquid production. During the process, the anode slime will stick to the tank wall and the pole plate. As a result, the utilization rate of tellurium is reduced, and tellurium resources are not fully utilized. Add tricalcium silicate additive to the tellurium-containing solution, control the mass ratio of additive to tin in the solution to 0.2:1, react at 50°C, and react for 2 hours. After the deposition is completed, filter and neutralize the obtained filtrate with 50g / l sulfuric acid, and filter to obtain a tellurium enrichment containing more than 60% tellurium, which can be used as a high-quality tellurium raw material to en...

Embodiment 2

[0016] The tellurium-containing liquid produced in copper smelting enterprises also contains a certain amount of tin. During the process of directly entering the tellurium production line to recover tellurium, the content of tin impurities in the tellurium electrolyte will increase, making it difficult to settle and separate the solid and liquid during liquid production. During the process, the anode slime will stick to the tank wall and the pole plate. As a result, the utilization rate of tellurium is reduced, and tellurium resources are not fully utilized. In the solution containing tellurium, add a composite silicate additive, control the mass ratio of the additive to the tin in the solution to 1:1, the reaction temperature is 70°C, and the reaction time is 6 hours. After the deposition is completed, filter and neutralize the obtained filtrate with 70g / l sulfuric acid, and filter to obtain a tellurium enrichment containing more than 60% tellurium, which can be used as a hig...

Embodiment 3

[0018] The tellurium-containing liquid produced in copper smelting enterprises also contains a certain amount of tin. During the process of directly entering the tellurium production line to recover tellurium, the content of tin impurities in the tellurium electrolyte will increase, making it difficult to settle and separate the solid and liquid during liquid production. During the process, the anode slime will stick to the tank wall and the pole plate. As a result, the utilization rate of tellurium is reduced, and tellurium resources are not fully utilized. In the tellurium-containing solution, a composite silicate additive is added, the mass ratio of the additive to the tin in the solution is controlled to be 2:1, the reaction temperature is 90° C., and the reaction time is 12 hours. After the deposition is completed, filter and neutralize the obtained filtrate with 90g / l sulfuric acid, and filter to obtain a tellurium enrichment containing more than 60% tellurium, which can...

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Abstract

The invention belongs to the technical field of extractive metallurgy of nonferrous metals, and specifically relates to a method for deep removal of tin in a tellurium-contained solution. The method is characterized by comprising the following steps: adding a composite silicate additive into the tellurium-contained solution, controlling a mass ratio of the composite silicate additive to tin in the tellurium-contained solution to be (0.2-2): 1, a reaction temperature to be 50 to 90 DEG C and a reaction time to be 2 to 12 hours, after deposition is completed, carrying out filtering, then subjecting obtained filtrate to acid neutralization, and carrying out filtering so as to obtain enriched tellurium. The method provided by the invention can realize deep removal of tin, and can obtain enriched tellurium with a tellurium content reaching 60% or above.

Description

technical field [0001] The invention relates to a method for deeply removing tin from a tellurium-containing solution, and belongs to the technical field of nonferrous metal extraction metallurgy. Background technique [0002] The main applications of tellurium as a metallurgical additive are (1) Adding 0.04% tellurium to low-carbon high-speed cutting steel and high-strength steel can improve its cutting performance, and the cutting speed can reach 195m / min, which is 3 times higher than the general one; (2 ) Adding 0.01-0.1% tellurium to ductile cast iron can refine grains (3) Adding 0.5% tellurium to copper-based alloys can not only significantly improve cutting performance, but also improve electrical and thermal conductivity (4) Adding 0.01-0.5% tellurium to lead (tin or aluminum)-based alloys can improve its corrosion resistance, hardness and elasticity, especially suitable for Used in submarine cables, automobile bearings and chemical equipment pipelines, etc. [0003...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B19/02
CPCC01B19/02
Inventor 杨兴文祝志兵涂相林赵海涛罗标孙文达刘宏刘磊黄晓芳邹志武钟志燕
Owner JIANGXI COPPER
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