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Nickel-containing ore comprehensive utilization method

A nickel ore and fine ore technology, applied in the field of comprehensive utilization of nickel-containing ore, can solve the problems of high energy consumption, large amount of slag, and poor material recycling, and achieve the effect of low energy consumption

Inactive Publication Date: 2014-08-27
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the main methods of processing nickel ore are divided into pyrometallurgical process and hydrometallurgical process. The pyrometallurgical process mainly includes the blast furnace process, the rotary kiln-electric furnace melting process and the reduction metallurgical nickel-iron process outside the furnace. The hydrometallurgical process mainly includes Reduction roasting-ammonia leaching process and pressurized acid leaching process with sulfuric acid as the medium; the existing pyrometallurgical process is more suitable for processing nickel ore resources with a nickel content of more than 2%, and there is a large amount of slag for low-grade minerals with a nickel content of less than 1.5% , high energy consumption and other problems; compared with the pyrometallurgical process, the existing hydrometallurgical process has low energy consumption and is environmentally friendly, but there are disadvantages such as complex process routes, high requirements for equipment and process conditions, and poor material recycling.

Method used

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Experimental program
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Effect test

Embodiment 1

[0040] Adopt the first option;

[0041] The nickel-containing ore is ground to a particle size of -170 mesh, accounting for more than 90% of the total, and made into nickel-containing fine ore; the nickel-containing ore used is laterite nickel ore;

[0042] Mix nickel-containing fine ore with ammonium bisulfate and add water to make slurry. The mixing ratio of ammonium bisulfate and nickel-containing fine ore is based on the ratio of ammonium bisulfate to NiO and Fe in nickel-containing fine ore. 2 o 3 The molar ratio of the total amount is 5; The addition of water is 0.5 times of the total weight of nickel-containing fine ore and ammonium bisulfate;

[0043] Heat the ore pulp to 280°C under stirring conditions for reaction, and the reaction time is 5 minutes; after the reaction is completed, filter while it is hot to obtain a solid phase and a filtrate; the solid phase is washed with water and dried to obtain a high-silicon slag;

[0044] Inject ammonia gas or add ammonia w...

Embodiment 2

[0056] Adopt the second option;

[0057] The nickel-containing ore is ground to a particle size of -170 mesh, accounting for more than 90% of the total, and made into nickel-containing fine ore; the nickel-containing ore used is laterite nickel ore;

[0058] Mix nickel-containing fine ore with ammonium bisulfate and add water to make slurry. The mixing ratio of ammonium bisulfate and nickel-containing fine ore is based on the ratio of ammonium bisulfate to NiO and Fe in nickel-containing fine ore. 2 o 3 The molar ratio of the total amount is 5; The addition of water is 0.5 times of the total weight of nickel-containing fine ore and ammonium bisulfate;

[0059] Heat the ore pulp to 280°C under stirring conditions for reaction, and the reaction time is 5 minutes; after the reaction is completed, filter while it is hot to obtain a solid phase and a filtrate; the solid phase is washed with water and dried to obtain a high-silicon slag;

[0060] Remove iron from the primary filtr...

Embodiment 3

[0071] Method is with embodiment 1, and difference is:

[0072] (1) The nickel-containing ore used is silicon-magnesium-nickel ore;

[0073] (2) Mix nickel-containing fine ore with ammonium bisulfate and add water to make slurry. The mixing ratio of ammonium bisulfate and nickel-containing fine ore is based on the ratio of ammonium bisulfate to NiO and Fe in nickel-containing fine ore. 2 o 3 The molar ratio of the total amount is 8; the addition of water is 1 time of the total weight of nickel-containing fine ore and ammonium bisulfate;

[0074] (3) Heat the ore pulp to 80°C under stirring conditions for reaction, and the reaction time is 240 minutes;

[0075] (4) Pass ammonia gas or add ammonia water into the primary filtrate under stirring conditions until the pH value of the primary filtrate is 3.5;

[0076] (5) Pass ammonia gas or add ammonia water into the secondary filtrate under stirring conditions until the pH value of the secondary filtrate is 7;

[0077] (6) The ...

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Abstract

The invention provides a nickel-containing ore comprehensive utilization method, and belongs to the technical field of mineral processing. The nickel-containing ore comprehensive utilization method comprises the following steps: (1) levigating nickel-containing ore so as to prepare nickel-containing fine ore; (2) mixing the nickel-containing fine ore and ammonium bisulfate, and adding water so as to prepare ore pulp; (3) carrying out heating reaction under a stirring condition; filtering while heating so as to obtain a solid phase and filtrate; and washing and drying primary solid phase so as to obtain high silica slag; (4) feeding ammonia gas into the filtrate or adding ammonia water to the filtrate so as to separate out ferric hydroxide, or carrying out iron removal; (5) adjusting a pH value to 6.5-9, filtering and separating out nickel hydroxide; and (6) separating out filtrate evaporative crystals of nickel so as to obtain ammonium sulfate solids. The nickel-containing ore comprehensive utilization method has the advantages that additives are not added, nickel oxide and iron in the nickel-containing ore resource are effectively leached, the comprehensive utilization of the resource is realized, and no exhaust gas, waste liquid and waste residues are discharged in the whole process.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, in particular to a comprehensive utilization method of nickel-containing ore. Background technique [0002] Nickel is a silver-white metal with good mechanical strength, ferromagnetism and ductility. It can conduct electricity and heat. It is mainly used to make stainless steel and other corrosion-resistant alloys. It can also be used as a hydrogenation catalyst and for ceramic products, Special chemical utensils, etc., are indispensable strategic materials for national defense industry and aviation industry. [0003] With the rapid development of the national economy and the aviation and aerospace industries, the demand for nickel is increasing, and the development of nickel ore resources has been accelerated around the world. At the same time, the reserves of high-quality nickel-containing mineral resources are continuously decreasing. Low-grade nickel resources are imminent. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/04C22B23/00
CPCY02P10/20
Inventor 吴玉胜李来时
Owner SHENYANG POLYTECHNIC UNIV