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Combined high-pressure acid leaching method for cobalt containing sulfide and heterogenite

A technology for sulfide and water cobalt ore, which is applied in the field of cobalt hydrometallurgy, can solve the problems of increasing production cost, increasing lower purification cost, low leaching rate, etc., and achieves the effects of improving reliability, reducing risk and high-efficiency leaching.

Inactive Publication Date: 2016-05-11
GUANGDONG JIANA ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cobalt sulfide ore is leached under normal pressure, and the leaching rate is low; under normal pressure, most of the iron enters the solution, which increases the purification cost of the next stage; the leaching process still needs to add a reducing agent, which increases the production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Cobalt-copper sulfide ore containing 8.68wt% cobalt, 12.18wt% copper, 10.68wt% iron and 15.25wt% sulfur and cobalt water containing 12.02wt% cobalt, 1.57wt% copper, 1.93wt% iron and 0.009wt% sulfur Ore (ore grade is mass percentage, dimensionless) is ball milled to 200 mesh, accounting for more than 98%, mixed at a mass ratio of 1:15, then mixed with water at a liquid-solid ratio of 5 (mass ratio is dimensionless), and lignin sulphur is added Sodium bicarbonate is used as an additive, and the initial acidity is controlled to be 1mol / L. The temperature in the kettle is 180°C, the pressure is 1.0MPa, and the stirring speed is 350r / min. After 6 hours of reaction, it is filtered. The leaching result is: the cobalt leaching rate is 98.74%, and the cobalt content in the slag is 0.23 %, the copper leaching rate is 97.01%, and the slag contains 0.096% copper.

Embodiment 2

[0020] The mixed nickel-cobalt sulfide precipitate containing 12.15wt% cobalt, 20.50wt% nickel and 19.25wt% sulfur and the hydrocobalt ore containing 9.44wt% cobalt, 2.65wt% copper, 8.4wt% iron and 0.0091wt% sulfur were ball milled to 200 Mesh accounts for more than 98%, mixed according to the mass ratio of 1:25, and then mixed with water according to the liquid-solid ratio of 6, adding gelatin as an additive, controlling the initial acidity to 1.1mol / L, the temperature in the kettle is 200°C, and the pressure is 1.5MPa. The stirring speed was 380r / min and the reaction was carried out for 5 hours. After filtering, the leaching results were as follows: the cobalt leaching rate was 98.21%, the slag contained cobalt was 0.26%, the copper leaching rate was 96.98%, and the slag contained copper 0.15%.

Embodiment 3

[0022] The mixed nickel-cobalt sulfide precipitate containing 18.10wt% cobalt, 12.50wt% nickel and 20.30wt% sulfur and the hydrocobalt ore containing 8.7wt% cobalt, 3.85wt% copper, 6.26wt% iron and 0.038wt% sulfur were ball milled to 200 Mesh accounted for more than 98%, mixed according to the mass ratio of 1:22, added animal glue as an additive, and then mixed with water according to the liquid-solid ratio of 7, the initial acidity was controlled to 1.2mol / L, the temperature in the kettle was 220°C, and the pressure was 2.0MPa , stirring at 400r / min for 4 hours and then filtered, the leaching results were: cobalt leaching rate 97.6%, slag containing cobalt 0.35%, copper leaching rate 95.83%, slag containing copper 0.2%.

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Abstract

The invention discloses a combined high-pressure acid leaching method for cobalt containing sulfide and heterogenite. The method comprises the following steps that 1, copper sulfide cobalt ore and the heterogenite obtained after ball milling are mixed for size mixing; and 2, the materials are added to an autoclave after size mixing, and stirring, pressurizing and acid leaching are carried out to obtain leachate and leaching residues. According to the method, the copper sulfide cobalt ore is subjected to oxidizing leaching through the heterogenite, so that a reducing agent is prevented from being added in the heterogenite leaching process, and meanwhile introduction of oxygen in the copper sulfide cobalt ore leaching process is omitted; and then production cost is greatly reduced, the reliability of the operation of operating personnel is improved, and the risks for the operating personnel in the production process are reduced.

Description

technical field [0001] The invention relates to the field of cobalt hydrometallurgy, in particular to a method for oxidizing and leaching cobalt-containing sulfides from hydrocobalt ore under pressure. Background technique [0002] my country is a country with poor cobalt resources. The main characteristics of cobalt resources are that there are many lean ores and few rich ores, and there is a lack of separate cobalt deposits. Cobalt mainly exists in the form of symbiotic elements in nickel, copper, iron and other veins, so cobalt is mainly used as nickel. , Copper and iron mines are recovered in the form of by-products, and primary cobalt resources are very few. Most of my country's cobalt resources rely on imports, including cobalt concentrates, white alloys, cobalt slag and various cobalt-containing wastes, among which hydrocobalt ore, as a kind of cobalt concentrates, is imported in large quantities from abroad. Water cobalt ore is leached by acid leaching with reducing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B23/00C22B15/00C22B3/08
CPCC22B3/08C22B15/0071C22B23/043Y02P10/20
Inventor 肖孝军秦汝勇付海阔徐定源陈亮梁卫春李松
Owner GUANGDONG JIANA ENERGY TECH CO LTD
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