Method for treating transition type and limonite type nickel laterite ore by using industrial pickling waste acid

A technology for laterite nickel ore and industrial pickling, which is applied in the field of resource recycling and mineral processing, can solve the problems of low final product grade, high cost and energy consumption, and difficulty in product separation.

Active Publication Date: 2015-11-25
杨超
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Aiming at the problems of high process cost, low concentration of valuable metals in the leach solution, low pellet strength of laterite nickel ore, poor ball formation, low burst temperature and low grade of final product in the existing technology of laterite nickel ore treatment process; At the same time, in view of the secondary pollution, high cost and energy consumption, large investment, low efficiency of evaporation and crystallization in the industrial pickling waste acid treatment process in the prior art, the separation of products obtained by the replacement method is difficult and the product purity is unstable, etc.

Method used

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  • Method for treating transition type and limonite type nickel laterite ore by using industrial pickling waste acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] (1) Preparation of composite additives:

[0078] Take 100mL of pickling waste liquid, add 20g of transitional laterite nickel ore, stir the reaction for 20min at a stirring rate of 120r / min, add 20g of calcium oxide to adjust the pH of the solution to stabilize between 6-7, and obtain a composite additive after the reaction;

[0079] (2) The dried limonite-type laterite nickel ore, coke and sodium silicate are mixed and then crushed and milled to a particle size of ≤100 mesh to account for 85wt of the total amount of limonite-type laterite nickel ore, coke and sodium silicate Among them, the addition amount of coke is 10wt% of laterite nickel ore, and the addition amount of sodium silicate is 5wt% of laterite nickel ore. Then granulate on a disc granulator to obtain green laterite nickel ore pellets with a diameter of 8-12mm. The amount of compound additives added during the granulation process is the total amount of limonite-type laterite nickel ore, coke and sodium silicat...

Embodiment 2

[0084] (1) Preparation of composite additives:

[0085] Take 100mL of pickling waste liquid, add 20g transitional laterite nickel ore, stir the reaction for 20min at a stirring rate of 120r / min, add 20g calcium hydroxide to adjust the pH of the solution to stabilize between 6-7, and obtain composite additives after the reaction;

[0086] (2) The dried limonite-type laterite nickel ore, white coal and sodium carbonate are mixed and then crushed and ground to a particle size of ≤100 meshes to account for 85wt of the total amount of limonite-type laterite nickel ore, white coal and sodium carbonate Among them, the addition amount of white coal is 8wt% of laterite nickel ore, and the addition amount of sodium carbonate is 4wt% of laterite nickel ore. Then granulate on a disc granulator to obtain green laterite nickel ore pellets with a diameter of 8-12mm. The amount of compound additives added during the granulation process is the total amount of limonite laterite nickel ore, white coa...

Embodiment 3

[0091] (1) Preparation of composite additives:

[0092] Take 100mL of pickling waste liquid, add 20g transitional laterite nickel ore, stir the reaction for 20min at a stirring rate of 120r / min, add 20g calcium hydroxide to adjust the pH of the solution to stabilize between 6-7, and obtain composite additives after the reaction;

[0093] (2) The dried limonite-type laterite nickel ore, lignite and sodium hydroxide are mixed and then crushed and milled to a particle size of ≤100 meshes to account for 85wt of the total amount of limonite-type laterite nickel ore, lignite and sodium hydroxide Among them, the addition amount of lignite is 7wt% of laterite nickel ore, and the addition amount of sodium hydroxide is 3wt% of laterite nickel ore. Then granulate on a disc granulator to obtain green laterite nickel ore pellets with a diameter of 8-12mm. The amount of compound additives added during the granulation process is the total amount of limonite-type laterite nickel ore, lignite and s...

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Abstract

The invention provides a method for treating transition type and limonite type nickel laterite ore by using industrial pickling waste acid. The method comprises the following steps: mixing transition type nickel laterite ore with industrial pickling waste acid, and adding calcium-based powder to prepare a compound additive; after mixing the obtained compound additive with limonite type nickel laterite ore, a reducing agent and an accelerant, pelletizing; after cold consolidation, carrying out activated roasting and reducing roasting; after roasting, carrying out water quenching, crushing and grinding and magnetic separation, so as to finally obtain ferronickel powder. According to the method, oxides in the transition type nickel laterite ore are fully used to prepare the compound additive, and nickel and cobalt in the transition type nickel laterite ore are leached at the same time; besides, the product generated through neutral reaction has the effects of quick condensation and cold consolidation, so that the problems that in the treatment technology of nickel laterite ore, the green pellet strength is not high, balling is poor, the decrepitation temperature is low, the product grade is lowered due to bentonite addition, and the like, are solved, the production cost is reduced, and the problem of environmental pollution of industrial pickling waste acid is solved.

Description

Technical field [0001] The invention belongs to the technical field of resource recycling and mineral processing, and relates to a method for treating transitional and limonite laterite nickel ore by using industrial pickling waste acid, and in particular to a transitional pickling waste liquid treatment process obtained from surface treatment of iron and steel Type and Limonite type laterite nickel ore methods. Background technique [0002] my country is in the stage of industrialization. With the acceleration of economic development, the demand for nickel is also increasing. Since 2005, China has replaced Japan as the country with the largest nickel consumption in the world. At present, 65% of the world's nickel is used to produce stainless steel. With the rapid development of the stainless steel industry, the world's demand for nickel is also increasing, and the supply is in short supply. At present, the nickel resources available for human development and utilization are l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B1/24C22B23/00
Inventor 马守栋吴兆钰
Owner 杨超
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