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Method for purifying zinc sulfide solution

A zinc sulfate solution and solution technology, applied in the direction of improving process efficiency, etc., can solve the problems of ineffective recovery of suspended solids, lower raw material utilization efficiency, and large zinc powder consumption, so as to eliminate adverse effects and reduce zinc powder Consumption, the effect of low zinc powder consumption

Inactive Publication Date: 2013-07-10
吴鋆
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantages of adopting this purification method are: 1. the suspended solids in the neutral supernatant solution are not effectively recovered, which reduces the utilization efficiency of raw materials; gram, the production cost is high; ③ the obtained purification slag needs to be reprocessed to produce copper slag and sponge cadmium products; ④ equipment investment is large and occupies a lot of land

Method used

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  • Method for purifying zinc sulfide solution

Examples

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Effect test

no. 1 example

[0029] Present embodiment is the first example of the purification method of zinc sulfate solution of the present invention, comprises the steps:

[0030] (1) Neutral supernatant solution to remove suspended solids: use Φ2600mm Sean filter to 40m 3 Precisely filter the zinc sulfate neutral supernatant solution with 800mg / L of solid floating matter, Cu0.4g / L, Cd0.4g / L, Co1.0mg / L, temperature of 55°C, and pH value of 5.0 at a speed of / h. The suspended matter content of the filtered solution is 12mg / L;

[0031](2) One-stage purification and copper removal: 70m of the solution filtered by Sean filter 3 , pumped into 80m 3 Add 33.6kg of zinc powder to the purification tank of the first section, stir at a temperature of 55°C for 90 minutes, then filter with a filter press for solid-liquid separation, and obtain 46kg of copper slag containing Cu59.3% and a section of copper slag containing Cu10.5mg / L Purification Filtration Solution 70m 3 ;

[0032] (3) Second-stage purificatio...

no. 2 example

[0036] Present embodiment is the second example of the purification method of zinc sulfate solution of the present invention, comprises the steps:

[0037] (1) Neutral supernatant solution to remove suspended solids: use Φ2600mm Sean filter to 40m 3 Precisely filter the zinc sulfate neutral supernatant solution with 1400mg / L of solid floating matter, Cu0.7g / L, Cd0.8g / L, Co3.0mg / L, temperature of 60°C, and pH value of 5.2 at a speed of / h. The suspended matter content of the filtered solution is 16mg / L;

[0038] (2) One-stage purification and copper removal: 70m of the solution filtered by Sean filter 3 , pumped into 80m 3 Add 58.8kg of zinc powder to the first-stage purification tank, stir at 60°C for 90 minutes, then filter with a filter press to separate solids and liquids, and obtain 81kg of copper slag containing Cu60.1%, and a section of copper slag containing Cu12.3mg / L Purification Filtration Solution 70m 3 ;

[0039] (3) Second-stage purification and removal of ca...

no. 3 example

[0043] Present embodiment is the 3rd example of the purification method of zinc sulfate solution of the present invention, comprises the steps:

[0044] (1) Neutral supernatant solution to remove suspended solids: use Φ2600mm Sean filter to 40m 3 Precisely filter the zinc sulfate neutral supernatant solution with 2000mg / L of solid floating matter, Cu1.0g / L, Cd1.2g / L, Co5.0mg / L, temperature 65°C, and pH value 5.4 at a speed of / h. The suspended matter content of the filtered solution is 24mg / L;

[0045] (2) One-stage purification and copper removal: 70m of the solution filtered by Sean filter 3 , pumped into 80m 3 Add 84kg of zinc powder to the first-stage purification tank, stir at 65°C for 90 minutes, then filter with a filter press to separate solid and liquid, and obtain a first-stage purification filter containing 118kg of Cu59.0% copper slag and Cu5.5mg / L Liquid 70m 3 ;

[0046] (3) Second-stage purification and removal of cadmium: 70m of the first-stage purification...

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Abstract

A method for purifying zinc sulfide solution comprises the following steps of: firstly, removing suspended solids from zinc sulfide solution by using a sean filter at a normal temperature; secondly, adding zinc powder by 120% of solution copper metal weight, stirring for 90 minutes at normal temperature for removing copper, and filtering; thirdly, adding zinc powder by 120-150% of solution cadmium metal weight, stirring for 60 minutes at a normal temperature for removing cadmium, and filtering; fourthly, increasing the temperature of the solution to the range of 82-94 DEG C, adding zinc powder in a proportion of 1 g / L of solution, and simultaneously adding some antimonous oxide, stirring for 50-70 minutes, removing cobalt and nickel impurities, and filtering; and finally, removing few suspended solids from the filtered solution by the sean filter. The method provided by the invention is capable of directly producing copper slag and sponge cadmium product; and the solution is capable of meeting the quality standard requirements of fresh electrolyte even though no extra zinc powder is added to the solution to remove residual cadmium; therefore, the consumption of the zinc powder is effectively reduced.

Description

technical field [0001] The invention relates to the field of nonferrous metal hydrometallurgy, in particular to a method for purifying zinc sulfate solution. Background technique [0002] In the conventional hydrometallurgy zinc process, its main process is usually divided into four processes: fluidized furnace desulfurization and flue gas acid production, zinc calcine leaching, zinc sulfate solution purification, solution electrolysis and product melting and casting. For different zinc concentrate raw materials, the specific control methods and conditions of each process are different. In the desulfurization of fluidized furnace and flue gas acid production process, high-silicon and high-lead concentrates are roasted at medium temperature, and low-silicon and low-lead concentrates are roasted at high temperature. Roasting; in the leaching process, the low-iron zinc calcine is leached in the middle and low second stages, while the high-iron zinc calcine is leached in the mid...

Claims

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Application Information

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IPC IPC(8): C22B3/22C22B3/46C22B19/00
CPCY02P10/20
Inventor 吴鋆
Owner 吴鋆
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