A kind of method for separating element from tin-containing bismuth tellurium solution

A solution and bismuth tellurium technology is applied in the field of hydrometallurgy and multi-element separation, which can solve the problems of low and multi-element tellurium-containing materials, single recovered elements, and difficult to handle grades, and achieves low tellurium-containing grades and high enrichment ratios. , the effect of short transition time

Active Publication Date: 2016-08-24
JIANGXI COPPER
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The leaching of the above two methods requires acid-base chlorination oxidation leaching, repeated impurity removal, single element recovery, a large amount of oxidant to be added, high production cost, and the production process has the disadvantage of producing a large amount of slag. Tellurium is relatively dispersed and difficult to recover. Handle low-grade multi-element tellurium-containing materials, especially the separation of multi-element tellurium concentration

Method used

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  • A kind of method for separating element from tin-containing bismuth tellurium solution

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Experimental program
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Effect test

Embodiment 1

[0039] The composition of the tellurium-containing solution adopted is as follows: Cu 6.80g / L, Te2g / L, Bi0.75g / L%, Sn0.77g / L, Ag36ppm;

[0040] a. Reduction neutralization and precipitation

[0041] The multi-element solution containing tellurium, tin and bismuth is mixed and stirred with the silver deep reduction waste liquid containing 120g / L sodium sulfite and 20g / L sodium hydroxide. The temperature is controlled at 20°C, the time is 1 hour, and the pH value is 3.0. After the reaction, the liquid contains tellurium Below 0.01g / L, the tellurium precipitation rate is above 99%. After the reaction is completed, filter for solid-liquid separation, and the valuable metals tin, copper, bismuth, tellurium, and silver enter the slag phase, which is bismuth-silver slag rich in tin and tellurium , most of the copper enters the solution and is sent to carbon copper for treatment;

[0042] The composition of gold and silver slag rich in tin and tellurium is as follows: Cu 6.18%, Te32....

Embodiment 2

[0059] The composition of the tellurium-containing solution adopted is as follows: Cu 6.80g / L, Te:5g / L, Bi0.75g / L%, Sn0.77g / L, Ag36ppm;

[0060] a. Reduction neutralization and precipitation

[0061] Contain tellurium tin bismuth multi-element solution and contain sodium sulfite 250g / L, the silver deep reduction waste liquid containing sodium hydroxide 10g / L is mixed and stirred, and the control temperature is 60 ℃, and the time is 1.5 hours, and the pH value is 4.0, and the liquid after reaction The tellurium content is less than 0.01g / L, and the tellurium precipitation rate is above 99%. After the reaction is completed, the solid-liquid separation is carried out by filtration, and the valuable metals tin, copper, bismuth, tellurium, and silver enter the slag phase, which is bismuth rich in tin and tellurium. Silver slag, most of the copper enters the solution and is sent to carbon copper for treatment;

[0062] The composition of gold and silver slag rich in tin and telluri...

Embodiment 3

[0079] The composition of the tellurium-containing solution adopted is as follows: Cu 6.80g / L, Te9g / L, Bi0.75g / L%, Sn0.77g / L, Ag36ppm;

[0080] a. Reduction neutralization and precipitation

[0081] The multi-element solution containing tellurium, tin and bismuth is mixed and stirred with a solution containing 50g / L sodium sulfite and 30g / L sodium hydroxide, the temperature is controlled at 99°C, the time is 3 hours, and the pH value is 5.0. After the reaction, the solution contains tellurium at 0.01g / L Below, the tellurium precipitation rate is above 99%. After the reaction is completed, filter for solid-liquid separation, and the valuable metals tin, copper, bismuth, tellurium, and silver enter the slag phase, which is bismuth-silver slag rich in tin and tellurium, and most of the copper enters the slag phase. Solution, sent carbon copper treatment;

[0082] The composition of gold and silver slag rich in tin and tellurium is as follows: Cu 6.18%, Te32.32%, Bi12.77%, Sn13.4...

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Abstract

The invention discloses a method for separating elements from a tin-tellurium-bismuth containing solution, and belongs to hydrometallurgy. Because of the low content and low grade of tin, tellurium and bismuth, tin, tellurium and bismuth in the tin-tellurium-bismuth containing solution cannot be economically recycled when basic cupric carbonate is produced along with wastewater treatment at present, and the resources can be greatly wasted. The method comprises the following steps: adding an industrial waste liquid containing multiple components, appropriately adjusting the pH value, primarily separating from other base metals, performing oxidation conversion treatment on the obtained tellurium enriched product so as to obtain a secondary enriched product, further leaching tin and bismuth by using low-concentration sodium hydroxide strong base, and separating tin by using high-concentration sodium hydroxide strong base, thereby obtaining a high-grade crude tin product, adjusting the pH value of a tellurium solution by using a diluted acid, and removing impurities such as tin and lead for a second time, thereby obtaining high-grade tellurium dioxide, providing the high-grade tellurium dioxide to a tellurium refining plant for refining tellurium, and extracting other elements from converted slag which is rich in bismuth and silver. The method is free of dispersion in the tellurium extraction process, has the advantages of high tellurium recycling rate and direct yield, is good in tin and bismuth separation effect and is applicable to treatment on low-concentration tin-tellurium-bismuth containing solutions.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metallurgy and relates to a hydrometallurgical process, in particular to a method for separating multiple elements from a solution containing tin, tellurium and bismuth. Background technique [0002] Tellurium is a rare element with extremely low levels in nature. Its average content in the earth's crust is about 1X10 -7 %, it is difficult to form a single deposit. At present, tellurium extraction by wet process is mainly extracted from various associated tellurium multi-element materials. tellurium method. Using inorganic acid oxidation leaching, copper plate replacement of precious metals, sodium sulfide precipitation copper, neutralization precipitation tellurium, crude TeO 2 Alkaline leaching, Na 2 S removal of impurities, concentration, electrowinning. On August 13, 2012, Chinese Invention Patent Application Publication No. 201210286217 disclosed a process for extracting high-purity ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B25/06C22B30/06C01B19/02
CPCY02P10/20
Inventor 汪飞虎胡建辉郑春到刘永平吴新明林东和饶红祝志兵黄冰周宇飞吴晓莉赵海涛沈广鑫赖建林
Owner JIANGXI COPPER
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