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Device for treating nickel-cobalt sewage in the hydrometallurgy industry by electrolytic method

A technology of hydrometallurgy and electrolysis, which is applied in the field of equipment for electrolytic treatment of nickel-cobalt sewage in the hydrometallurgy industry. It can solve the problems of high sewage treatment cost, secondary pollution, and poor effect, and achieve low facility investment and operation costs. , Less labor input and shorter process flow

Inactive Publication Date: 2014-06-04
GEM JIANGSU COBALT IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the defects of high cost, poor effect and secondary pollution of sewage treatment in the hydrometallurgical industry in the prior art, the purpose of the present invention is to provide a kind of equipment for electrolytic treatment of nickel-cobalt sewage in the hydrometallurgical industry

Method used

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  • Device for treating nickel-cobalt sewage in the hydrometallurgy industry by electrolytic method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Sewage containing Ni52.6mg / L, Co14.3mg / L, PH3.85, COD426.4mg / L, P organic 5.7mg / L, oil 21.7mg / L in 0.06m 3 The flow rate of / min is pumped into the electrolytic cell, the cell voltage is set to 2.9V, and the current density is adjusted to 108.52A / m 2 , electrolyzed for 30min, the liquid after electrolysis was filtered and tested, Ni: 0.25mg / L, Co: 0.20mg / L, PH7.37, COD106.5mg / L, P organic 1.9mg / L, oil in water 7.3 mg / L.

Embodiment 2

[0034] Sewage containing Ni90.4mg / L, Co19.5mg / L, PH3.62, COD956.4mg / L, P organic 11.9mg / L, oil 43.3mg / L in 0.08m 3 The flow rate of / min is pumped into the electrolytic cell, the cell voltage is set to 2.6V, and the current density is adjusted to 60.34A / m 2 , electrolyzed for 35 minutes, after electrolysis, the solution was filtered and detected, Ni: 0.46mg / L, Co: 0.34mg / L, PH6.75, COD195.2mg / L, P organic 2.8mg / L, oil in water 9.4 in the filtrate mg / L.

Embodiment 3

[0036] Pump sewage containing Ni136.2mg / L, Co51.6mg / L, PH3.81, COD673.8mg / L, P organic 8.7mg / L, and oil 29.6mg / L into the electrolytic cell at a flow rate of 0.07m3 / min Inside, set the cell voltage to 3.0V and adjust the current density to 105.16A / m 2 , electrolyzed for 40min, after electrolysis, the solution was filtered and tested, Ni: 0.39mg / L, Co: 0.31mg / L, PH7.29, COD134.6mg / L, P organic 2.3mg / L, oil in water 7.8 in the filtrate mg / L.

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Abstract

The invention relates to a device for treating nickel-cobalt sewage in the hydrometallurgy industry by an electrolytic method. The device comprises an electrolytic bath. The two ends of the electrolytic bath are respectively provided with a sewage inlet and a sewage outlet. The device is characterized in that: the electrolytic bath is provided with a plurality of groups of positive plates and a plurality of groups of negative plates; the plurality of groups of positive plates and the plurality of groups of negative plates are disposed at intervals in sequence, the positive plates and the negative plates are separately connected to a power supply through a power supply bus; when the device is utilized to treat the sewage, the sewage is fed into the electrolytic bath through the sewage inlet of the electrolytic bath at a flux of 0.05-0.08 m3 / min, the voltage among the positive plates and the negative plates is set to be 2.6-3.0 V, the current density is adjusted to be 60-120 A / m2, and the electrolysis time is 30-50 min; and the bath solution after electrolysis is filtered by a filter and filter residue is collected.

Description

technical field [0001] The invention relates to the field of sewage treatment in the hydrometallurgy industry, in particular to equipment for electrolytically treating nickel-cobalt sewage in the hydrometallurgy industry. Background technique [0002] In the hydrometallurgy industry, especially in the smelting of nickel-cobalt metal materials, it is inevitable to use organic extractants to enrich the nickel-cobalt metal ions in the aqueous solution, and the remaining liquid after extraction becomes waste water with no further use value. Industrial sewage not only has a low pH value, is rich in sodium chloride, magnesium sulfate, nickel, and cobalt inorganic salts, but also contains organic extractants that affect water quality COD and total phosphorus. For the treatment of this kind of sewage, traditional purification treatment methods such as vulcanization coagulation, resin adsorption, aeration, biochemical methods, etc., or problems such as cumbersome process, difficult o...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F103/16
Inventor 牛镇岭杜长福陈以贵何长荣
Owner GEM JIANGSU COBALT IND CO LTD
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