Method and device for treating washing water in refined indium production
A treatment method and washing water technology, applied in the field of metallurgy, can solve problems such as indium metal loss and environmental pollution, and achieve the effects of improving recovery rate, avoiding environmental pollution, and simple structure
Active Publication Date: 2017-04-12
HENAN YUGUANG ZINC IND
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Problems solved by technology
[0003] The purpose of the present invention is to overcome the problems of environmental pollution and indium metal loss caused by directly discharging the washing water to the waste water treatment station in the prior art, and provide a method and device for treating washing water in the production of refined indium. The method and device It can avoid the loss of indium metal, directly improve the recovery rate of indium metal, and can avoid the adverse effects of Cl- on the indium refining system
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[0014] Such as figure 1 Shown, a kind of processing method of washing water in the refined indium production comprises the following steps:
[0015] Step 1) Collect the acidic liquids such as sponge indium washing water, precipitated indium washing water, residual anode washing water and ingot slag washing water in the acid water tank in the production process of refined indium, and the alkaline slag washing water of cast anodes is collected in the in the alkaline sink.
[0016] Step 2), transport the acidic washing water in the acid water tank and the alkaline washing water in the alkaline water tank to the sinking indium tank according to the volume ratio, stir for 30 minutes, and then measure the pH value of the liquid in the sinking indium tank. If the pH value of the ore pulp is greater than 4.0, then transport the acid washing water from the acid water tank to the indium sinking tank, and measure the pH value of the pulp in the indium sinking tank after stirring for 30 ...
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The invention discloses a method and a device for treating washing water in refined indium production. According to the method and the device, acidic washing water and alkaline washing water are conveyed into an indium precipitation groove according to a volume ratio, the pH value of ore pulp in the indium precipitation groove is adjusted until the final pH value of the ore pulp in the indium precipitation groove reaches 3.5, the ore pulp is subjected to pressure filtration through an indium precipitation pressure filter, pressure filtration residues are conveyed into a water-washing and chlorine-removing groove for water-washing and chlorine-removal, pulp liquor is subjected to pressure filtration through a chlorine-removing pressure filter, and chlorine-removed pressure filtration residues are used as raw materials for indium production. The method and the device have the benefits that environmental pollution can be avoided, the loss of indium is avoided, the recovery rate of indium is directly increased, and negative influence of Cl on an indium refining system can be avoided; the device is simple in structure and easy to operate.
Description
technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method and device for treating washing water in the process of wet indium smelting. Background technique [0002] At present, in the process of wet indium smelting, the washing water of sponge indium, the washing water of indium separated by electrolysis, the washing water of residual anode, the washing water of alkali slag of casting anode and the washing water of ingot slag all contain a certain amount of indium metal and about 10g / l Cl-, because the washing water contains Cl-, the Cl- content of the system will increase after the washing water enters the zinc hydrometallurgy system, which will affect the life of the electrolytic anode plate in the zinc hydrometallurgy device, and also affect the quality of zinc ingots. It will cause adverse effects. In order to ensure the normal production of the hydrometallurgy system, the washing water is usually discharged to the waste...
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IPC IPC(8): C22B58/00C22B7/00
CPCY02P10/20
Inventor 王素霞何意李飞
Owner HENAN YUGUANG ZINC IND