Method for refining indium reverse extraction liquid and gathering valuable metal and application

A valuable metal and stripping solution technology, applied in the field of indium recovery, can solve the problems of low indium replacement efficiency and direct recovery rate, high consumption of zinc powder and sponge indium, and increased production costs, so as to achieve low production costs and easy operation. Convenient and realize the effect of recycling

Inactive Publication Date: 2016-04-13
ZHUZHOU SMELTER GRP
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The commonly used method for removing impurities in the indium stripping solution in the prior art is to use zinc powder or indium sponge to remove impurities in the indium stripping solution under the conditions of sufficient stirring and a purification temperature of 50-85°C. High acid content and high impurity content, this method can theoretically separate and enrich valuable metals such as bismuth and tin, but in fact, if the purification agent sponge indium or the sponge indium or zinc powder obtained by replacement is used as a reducing agent to remove impurities When removing, because the ab

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  • Method for refining indium reverse extraction liquid and gathering valuable metal and application

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Embodiment 1

[0043] In this embodiment, the mass-volume concentration (both in ion state) of the main components of the indium stripping solution is: In76.18g / L, Fe10.25g / L, Bi1.58g / L, Sn0.83g / L, As1.52g / L, Sb0.037g / L; HCl is 135.28g / L.

[0044] Step A: Neutralizing agent Na 2 CO 3 Add it to the purification tank with the indium stripping solution, stir to make it react completely, Na 2 CO 3 The addition amount is to make the mass-volume concentration of hydrochloric acid in the indium stripping solution be 50g / L. Step B: In the static state of stirring, add the reducing agent sponge indium to the solution system in step A at a temperature of 50°C at one time, and react for 12 hours. During the above process, the gas H 3 As produced less, to obtain a reducing solution; wherein, the amount of sponge indium is the Fe in the solution 3+ , AsO 3 3- 、 Bi 3+ 、Cu 2+ , Sn 4+ and Sn 2+ respectively reduced to Fe 2+ , As, Bi, Cu and Sn, etc. 3.5 times the theoretical amount.

[0045] St...

Embodiment 2

[0047] In this embodiment, the mass-volume concentration (both in ion state) of the main components of the indium stripping solution is: In76.18g / L, Fe10.25g / L, Bi1.58g / L, Sn0.83g / L, As1.52g / L, Sb0.037g / L; HCl is 135.28g / L.

[0048] Step A: Neutralizing agent NaHCO 3 Add it to the purification tank with the indium stripping solution, stir to make it react completely, NaHCO 3 The addition amount is to make the mass-volume concentration of hydrochloric acid in the indium stripping solution be 30g / L.

[0049] Step B: In the static state of stirring, add the reducing agent sponge indium to the solution system in step A at a temperature of 20°C at one time, and react for 3 hours to obtain the reducing solution; wherein, the amount of the sponge indium is the amount of Fe in the solution 3+ , AsO 3 3- 、 Bi 3+ 、Cu 2+ , Sn 4+ and Sn 2+ respectively reduced to Fe 2+ , As, Bi, Cu and Sn, etc. 2.0 times the theoretical amount.

[0050] Step C: Filter the reducing solution obtai...

Embodiment 3

[0052] In this embodiment, the mass-volume concentration (both in ion state) of the main components of the indium stripping solution is: In76.18g / L, Fe10.25g / L, Bi1.58g / L, Sn0.83g / L, As1.52g / L, Sb0.037g / L; HCl is 135.28g / L.

[0053] Step A: Add the neutralizing agent NaOH into the purification tank containing the indium stripping solution, stir to make the reaction complete, and the amount of NaOH added is such that the mass-volume concentration of hydrochloric acid in the indium stripping solution is 40 g / L.

[0054] Step B: In the static state of stirring, add the reducing agent sponge indium to the solution system in step A at a temperature of 40°C at one time, and react for 8 hours to obtain the reducing solution; wherein, the amount of the sponge indium is the amount of Fe in the solution 3+ , AsO 3 3- 、 Bi 3+ 、Cu 2+ , Sn 4+ and Sn 2+ respectively reduced to Fe 2+ , As, Bi, Cu and Sn, etc. 3.0 times the theoretical amount.

[0055]Step C: Filter the reducing solut...

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Abstract

The invention provides a method for refining indium reverse extraction liquid and gathering valuable metal. The method for refining the indium reverse extraction liquid and gathering the valuable metal includes the steps that A, a neutralizing agent is added to the indium reverse extraction liquid and stirred so as to be dissolved; B, a reducing agent is added to a neutralized solution, and AsO33-, Bi3+, Cu2+, Sn4+ and Sn2+ in the solution are reduced into As, Bi, Cu, Sn and other valuable metal; and C, filtration is performed, so that purified liquid and purified residues are obtained. By the adoption of the method for separating and gathering the valuable metal existing in the indium reverse extraction liquid in the form of the impurity element and refining the indium reverse extraction liquid, the impurities such as arsenic, copper, bismuth and tin in the indium reverse extraction liquid can be separated and gathered into the metal so as to be recycled conveniently, consumption of zinc sheets in a replacement process is reduced, and conditions are provided for one-time qualification of the precipitated indium impurity generated by following electrolysis refinement. Meanwhile, the method for refining the indium reverse extraction liquid and gathering the valuable metal is simple in process, convenient to operate and low in production cost.

Description

technical field [0001] The invention relates to the technical field of recovering indium in a zinc hydrometallurgy process, in particular to a method for upgrading indium stripping solution and enriching valuable metals. Background technique [0002] With the increasingly scarce indium resources, the composition of indium recycling raw materials is becoming more and more complex, and the impurity content is also rising, which puts forward higher requirements for indium recycling technology. Usually the recovery of indium adopts the extraction method. The extraction and recovery process of indium is generally: extraction of indium-containing material liquid, pickling, and stripping to obtain the stripping liquid. The lean organic phase is regenerated and returned for re-extraction, and the indium stripping liquid is then purified. , to obtain a purification solution, and the purification solution is then processed to obtain refined indium through conventional replacement, com...

Claims

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Application Information

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IPC IPC(8): C22B3/46C22B58/00
CPCC22B3/46C22B58/00Y02P10/20
Inventor 廖贻鹏刘一宁林文军伏东才
Owner ZHUZHOU SMELTER GRP
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