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Advanced treatment and recovery method of nickel and cobalt production enterprise extraction raffinate wastewater

A technology of advanced treatment and recovery method, which is applied in the direction of adsorption water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., which can solve the inevitable pollution of the surrounding environment, the expansion of industrial sewage water, limited Waste of resources and other issues, to achieve the effect of low labor intensity, low input and operation costs, and avoid secondary pollution

Inactive Publication Date: 2015-12-16
GEM JIANGSU COBALT IND CO LTD
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In nickel and cobalt hydrometallurgical production process, with P 507 After extraction and separation of nickel and cobalt by the extractant, the raffinate water still contains a small amount of nickel and cobalt ions. If this is not effectively recovered, it will not only waste limited resources but also inevitably pollute the surrounding environment after discharge; for this reason, related companies usually The best treatment and recovery method is to precipitate nickel and cobalt ions into hydroxides or sulfides with liquid caustic soda, lime or soda sulfide and then filter. Although this process is simple, reliable and easy to implement, the filtered sewage still contains 1.0 to 5.0 Nickel and cobalt of about mg / l are difficult to completely precipitate and recover. In order to meet the national sewage standards, most enterprises have to add other fresh water for dilution, resulting in the waste of fresh water and the expansion of industrial sewage water.

Method used

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  • Advanced treatment and recovery method of nickel and cobalt production enterprise extraction raffinate wastewater

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Experimental program
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Effect test

Embodiment 1

[0025] Put the raffinate sewage containing Ni1.6mg / l, Co3.4mg / l, pH6.25 after the primary precipitation of nickel and cobalt into the adsorption stirring tank, and add the activity with a mass ratio of 450:1 to the adsorption material when heated to 26°C Manganese dioxide powder, after stirring and adsorbing for 20 minutes, the residual nickel and cobalt in the water body were measured by filtration: Ni-0.31mg / l, Co-0.78mg / l;

Embodiment 2

[0027] Put the raffinate sewage containing Ni2.3mg / l, Co3.7mg / l, and pH7.19 after primary precipitation of nickel and cobalt into the adsorption stirring tank. Manganese dioxide powder, after stirring and adsorbing for 30 minutes, the residual nickel and cobalt in the water body were measured by filtration: Ni-0.16mg / l, Co-0.62mg / l;

Embodiment 3

[0029] Put the raffinate sewage containing Ni5.2mg / l, Co6.9mg / l, pH7.83 after the primary precipitation of nickel and cobalt into the adsorption stirring tank, and add the activity with a mass ratio of 500:1 to the adsorption material when heated to 31°C Manganese dioxide powder, after stirring and adsorbing for 22 minutes, the residual nickel and cobalt in the water body were measured by filtration: Ni-0.44mg / l, Co-0.93mg / l;

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Abstract

The invention provides an advanced treatment and recovery method of nickel and cobalt production enterprise extraction raffinate wastewater. The method comprises the following steps: 1, primarily settling extraction raffinate sewage, wherein the residual nickel and cobalt concentration is 1.0-5.0mg / l, and the residual organic matter concentration OiL is not greater than 20mg / l; 2, allowing the primarily settled extraction raffinate sewage to go through an adsorption column filled with active manganese dioxide or carrying out an adsorption reaction in a single-tank quantified intermittent manner or a multiple-groove parallel continuous stirring manner at a temperature of 25-50DEG C under a pH value of 6.0-8.5 for 20-40min according to a liquid (extraction raffinate sewage): solid (active manganese dioxide) ratio of 500:(1-5), and filtering after the adsorption ends to obtain filtrate water which is industrial sewage meeting standard reaching emission requirements; and 3, washing nickel and cobalt supported manganese dioxide slag powder filtered in step 2 by using 8.0-12.0% of an ammonia solution, eluting a nickel and cobalt backwash solution to recover nickel and cobalt, and rinsing eluted manganese dioxide to regenerate.

Description

technical field [0001] The invention relates to a chemical wastewater treatment technology, in particular to a method for advanced treatment and recovery of raffinate sewage in the nickel-cobalt hydrometallurgy industry by using an adsorption material, and belongs to the technical field of environmental governance and resource regeneration projects. Background technique [0002] In nickel and cobalt hydrometallurgical production process, with P 507 After extraction and separation of nickel and cobalt by the extractant, the raffinate water still contains a small amount of nickel and cobalt ions. If this is not effectively recovered, it will not only waste limited resources but also inevitably pollute the surrounding environment after discharge; for this reason, related companies usually The best treatment and recovery method is to precipitate nickel and cobalt ions into hydroxides or sulfides with liquid caustic soda, lime or soda sulfide and then filter. Although this proces...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/28C22B23/00
CPCY02P10/20
Inventor 伍一根牛镇岭杜长福叶圣毅
Owner GEM JIANGSU COBALT IND CO LTD
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