New method for removing impurities in tellurium electrolyte

An electrolyte and filtrate technology, applied in the field of metallurgy, can solve the problems of low tellurium recovery rate, high production load, long process flow, etc., and achieve the effects of high recovery rate, low energy consumption, and simple process flow

Inactive Publication Date: 2016-03-30
JINCHUAN GROUP LIMITED
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for removing impurities in a tellurium electrolyte, so as to solve the problems of long process flow, high production load, and low tellurium recovery rate in the prior art.

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  • New method for removing impurities in tellurium electrolyte
  • New method for removing impurities in tellurium electrolyte
  • New method for removing impurities in tellurium electrolyte

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Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] The component element analysis and content of raw material tellurium electrolyte are as shown in table 1 in this method:

[0024] Table 1

[0025]

[0026] A method for purifying tellurium electrolyte containing high lead and selenium, which comprises the following steps:

[0027] a. Purify and remove lead

[0028] Add sodium sulfide of 1.1 times the mass of lead in the solution to the tellurium electrolyte with higher lead and selenium content, stir and react at room temperature for 1 hour and then let it stand for 4 hours, filter the reacted solution to separate the solid and liquid, and the lead is mixed with lead sulfate The form precipitates in the filter residue, and tellurium and selenium exist in the filtrate in the form of sodium tellurite and sodium selenite respectively, reclaim the filter residue, and collect t...

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Abstract

The invention relates to the technical field of metallurgy and discloses a new method for removing impurities in tellurium electrolyte. According to the method, the wet process for preparing qualified tellurium electrolyte by removing lead through purification, depositing tellurium through hydrolysis and dissolving tellurium dioxide through sodium hydroxide is adopted; after the lead is removed through sodium sulfide, a solution is subjected to neutralizing treatment through hydrochloric acid, and the pH is adjusted to 5-5.5; sodium tellurite (Na2TeO3) and sodium selenite (Na2SeO3) are hydrolyzed to generate tellurium dioxide (TeO2) and selenium dioxide (SeO2) respectively; the selenium dioxide has good solubility and can be dissolved into water and inorganic acid easily, and the tellurium dioxide has poor solubility within the pH range of 5-5.5; selenium and the tellurium are separated preliminarily; finally, tellurium dioxide is subjected to alkali dissolution and filtration to obtain the qualified tellurium electrolyte. By means of the method, purification and impurity removal of the tellurium electrolyte with high lead and selenium contents are effectively realized; the technological process is simple, the quantity and varieties of adopted raw materials are fewer, and the production cost is effectively lowered; energy consumption is less, and the recovery rate of the tellurium is high.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for removing impurities in a tellurium electrolyte that can effectively reduce the contents of lead and selenium in the tellurium electrolyte. Background technique [0002] Tellurium is a rare metal widely used in metallurgy, instrumentation, electronics, chemical industry, glass and other industrial fields. Tellurium is mainly recovered from copper anode slime. The process used is mainly alkali leaching or acid leaching. After a series of purification and impurity removal processes such as purification and neutralization, the leaching solution is prepared into a tellurium electrolyte, which is subjected to insoluble anode electrowinning to finally obtain the product Refined tellurium. The process is relatively mature and stable, and the product quality is good. However, sometimes the impurity elements in the tellurium electrolyte produced on site are relatively hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/00
CPCC25B1/00
Inventor 吴建明张发志陈治毓廉会良杜彦君
Owner JINCHUAN GROUP LIMITED
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