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Technology for strengthening nickel cobalt of ammonia leaching from low-grade nickel laterite

A low-grade lateritic nickel ore technology, which is applied in the field of nickel extraction, can solve the problems of high operating and production costs, restricting the development of enterprises, and high consumption of auxiliary materials, achieving obvious economic and social benefits, improving utilization rate, and high leaching rate.

Inactive Publication Date: 2012-09-26
PINGAN XINHAI RESOURCE DEV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The pyrotechnic process requires a higher nickel grade, and for the laterite nickel ore with a nickel content of about 1%, the wet ammonia leaching process can be used, such as the wet pressurized acid leaching process, the production process is complicated, the process links, and the equipment Higher requirements, high consumption of auxiliary materials, serious pressure valve scarring, high operating and production costs, etc., directly restrict the development of enterprises

Method used

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  • Technology for strengthening nickel cobalt of ammonia leaching from low-grade nickel laterite
  • Technology for strengthening nickel cobalt of ammonia leaching from low-grade nickel laterite
  • Technology for strengthening nickel cobalt of ammonia leaching from low-grade nickel laterite

Examples

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Effect test

example 2

[0042] The leaching condition is: NH 3 / CO 2 =75(g·L -1 ) / 55(g·L -1 ), temperature 25°C, L / S=4:1, oxidation leaching time 120min. The leaching results are shown in the table below:

[0043] Effect of fineness on leaching results

[0044]

[0045] Industrial production example 3

[0046] Leaching condition: NH 3 / CO 2 75(g·L -1 ) / 55(g·L -1 ), the temperature is 25°C, the oxidation leaching time is 120min, and the slurry liquid-solid ratio is changed, the leaching results are as follows:

[0047]Leaching results of different liquid-solid ratios

[0048]

[0049]

[0050] Industrial production example 4

[0051] Leaching condition: NH 3 / CO 2 75(g·L -1 ) / 55(g·L -1 ), temperature 25°C, L / S=4:1. The leaching results are as follows:

[0052] Changes of Ni and Co content in slag during leaching process with time

[0053]

[0054] Industrial production example 5

[0055] Leaching condition: NH 3 / CO 2 75(g·L -1 ) / 55(g·L -1 ), oxidation leaching time ...

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Abstract

The invention discloses a technology for strengthening nickel cobalt of ammonia leaching from low-grade nickel laterite, which is characterized by comprising the following steps: a) screening ferruginous nickel laterite explored from a mine, roasting, selectively reducing the oxides of nickel, cobalt and ferrum in the nickel laterite into metal nickel, cobalt and ferroferric oxide; b) adding leaching agent into ore pulp, controlling the liquid / solid weight ratio of the ore pulp to be 4:1-5:1, directly adding the ore pulp into a leaching tank, and introducing air in for valuable metal; c) densely separating the leaching agent, carrying out first-section filter on supernate to obtain finished product liquid for extracting and separating, adding ammonium bicarbonate solution into first-section slag, and introducing air into for second-section leaching; d) densely separating second-section leaching agent, causing second-section supernate to return to a system for circulation, and sending second-section leaching slag to tailing disposal of a working procedure of magnetic separation; and e) blending the leaching agent by the circulation of a leaching agent part to ensure that nickel iondensity in the leaching liquid reaches 0.8-4.5g / L, thus obtaining the mineral finished liquid containing nickel cobalt.

Description

technical field [0001] The invention relates to a process for extracting nickel from nickel-containing minerals, in particular to a method for intensified ammonia leaching of nickel and cobalt from low-grade laterite nickel ore. Background technique [0002] At present, although most of the nickel in the world is produced from nickel sulfide deposits, people pay more and more attention to the mining, smelting and development of nickel oxide ore-latite nickel ore, which is a huge resource potential. The process principles for processing different ores can be summarized as: (1) fire process, (2) wet ammonia leaching process, (3) wet pressure acid leaching process. The pyrotechnic process requires a higher nickel grade, while the wet ammonia leaching process can be used for laterite nickel ore with a nickel content of about 1%, such as the wet pressurized acid leaching process, the production process is complicated, the process links, and the equipment Higher requirements, hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B23/00C22B3/14
CPCY02P10/20
Inventor 王涛王成彦陈胜利尹飞陈永强卫宏军阮书锋徐品丽
Owner PINGAN XINHAI RESOURCE DEV
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