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Processing method for purified cobalt residues of zinc and manganese hydrometallurgy

A technology of hydrometallurgy and treatment method, which is applied in the field of purification of cobalt slag, can solve the problems of low metal comprehensive utilization rate, high tail gas treatment cost, low metal leaching rate, etc., and achieve high use value, low cost, and environmental protection. The effect of less pollution

Inactive Publication Date: 2016-09-21
钟庆文
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the above method will emit a large amount of harmful and toxic gases such as mercaptan, hydrogen sulfide, carbon disulfide, sulfur dioxide, nitrogen monoxide, and nitrogen dioxide during the treatment process.
As a result, the above method not only has the disadvantages of long process flow, low leaching rate of cobalt and other metals, low metal comprehensive utilization rate and high cost, but also has the disadvantages of serious environmental pollution and high cost of tail gas treatment.

Method used

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  • Processing method for purified cobalt residues of zinc and manganese hydrometallurgy

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Experimental program
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Effect test

Embodiment 1

[0031] Raw materials: cobalt slag purified by hydrometallurgy (from Guangxi, obtained by purifying zinc leaching solution with xanthate), ingredients: 8.58% cobalt, 0.47% nickel, 11.41% zinc, 0.08% copper, 1.748% iron, 1.85% magnesium, calcium 0.49%, silicon 0.46%, cadmium 0.11%, lead 0.12%.

[0032] Add water to the purified cobalt slag, adjust the liquid-solid mass ratio to 6:1; react for 6 hours in an atmosphere with an oxygen pressure of 2MPa and a temperature of 130°C. Obtain 13.2 grams of leaching residue, cobalt content 0.01% (cobalt leaching rate reaches 99.98%), leaching solution is removed copper, cadmium, iron, calcium and magnesium, desiliconization, extraction depth removal of impurities, extraction of cobalt, nickel, zinc, precipitation Cobalt, calcined products cobalt oxide and nickel, zinc products.

Embodiment 2

[0034] Raw materials: cobalt slag purified by hydrometallurgy (from Henan, obtained by purifying zinc leachate with β-naphthol), composition: 6.8% cobalt, 0.86% nickel, 8.21% zinc, 0.44% copper, 2.48% iron, 0.45% magnesium , calcium 0.16%, silicon 0.42%, cadmium 1.63%, lead 0.03%.

[0035] Add a mixture of water and sulfuric acid to the purified cobalt slag, adjust the liquid-solid mass ratio to 5:1, and the volume ratio of water to sulfuric acid is 20:1; react for 4 hours in an atmosphere with an oxygen pressure of 1.6MPa and a temperature of 140°C . Obtain 7.5 grams of leaching residue, with a cobalt content of 0.008% (cobalt leaching rate reaches 99.99%). The leaching solution is removed through copper, cadmium, iron removal, calcium and magnesium removal, desiliconization, extraction depth removal of impurities, extraction of cobalt, nickel, zinc, precipitation Cobalt, calcined products cobalt oxide and nickel, zinc products.

Embodiment 3

[0037] Raw materials: Cobalt slag purified by hydrometallurgy zinc (sourced from Northeast China, obtained by purifying zinc leaching solution with thiram) Composition: Cobalt 4.9%, Nickel 0.86%, Zinc 15.21%, Copper 4.44%, Iron 3.16%, Magnesium 0.65%, Calcium 0.18% %, silicon 0.42%, cadmium 0.63%, lead 0.33%.

[0038] Add water to the purified cobalt slag, adjust the liquid-solid mass ratio to 4:1; react for 4 hours in an atmosphere with an oxygen pressure of 1.6MPa and a temperature of 160°C to obtain a leaching solution.

[0039] Add the leachate and water obtained above to another batch of the same purified cobalt slag, the volume ratio of water to leachate is 90:10, adjust the liquid-solid mass ratio to 4:1; The reaction was carried out under atmosphere for 4 hours. Obtain 15.5 grams of leaching slag, cobalt content 0.015% (cobalt leaching rate reaches 99.95%), leaching solution is through removing copper, cadmium, iron, calcium and magnesium, desiliconization, extraction...

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Abstract

The invention provides a processing method for purified cobalt residues of zinc and manganese hydrometallurgy. The method comprises the following steps that (1) water or a mixture of water and sulfuric acid or a mixture of water and leaching liquid obtained in the step (2) is added into the purified cobalt residues, and the liquid-solid mass ratio is adjusted to be 2-8: 1; and (2) reaction is conducted for 1-8 hours under the atmosphere that the oxygen pressure is 1-2 MPa and the temperature is 110-180 DEG C, and the leaching liquid is obtained. The purified cobalt residues are obtained by purifying zinc and manganese leaching liquid through special reagents, and the special reagents comprise at least one of xanthate, beta-naphthol, sodium dimethyl dithiocarbamate, ziram, SDD and naphthenic acid. The cobalt residues with the high cobalt content have the good processing capacity, and the cobalt rate is as high as 99.95%. The process is simple, the cost is low, and no poisonous gas is generated; and cobalt, zinc, nickel and zinc products can be prepared, and the leached residues mainly comprise carbon and have very high utilization value.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of nonferrous metals, and in particular relates to a treatment method for purifying cobalt slag from zinc and manganese hydrometallurgy. Background technique [0002] The main process of hydrometallurgy of zinc and manganese is divided into five processes: roasting, leaching, cleaning liquid, electrowinning and melting and casting. In order to meet the requirements of zinc and manganese electrowinning, harmful impurities such as cobalt, copper, cadmium, nickel, arsenic, antimony, and germanium in zinc sulfate and manganese leaching solutions must be purified to below the specified standards, and copper, manganese, etc. Valuable metals such as cadmium, cobalt, and nickel are well enriched for easy recycling. Therefore, purification is one of the most important processes in hydrometallurgy of zinc and manganese. The purification methods used at home and abroad mainly include zinc powder re...

Claims

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Application Information

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IPC IPC(8): C22B7/04
CPCC22B7/006C22B7/04Y02P10/20
Inventor 钟庆文
Owner 钟庆文
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