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

A laterite nickel ore and industrial pickling technology, 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 difficult product separation

Active Publication Date: 2017-09-26
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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  • A method for treating transition type and limonite type laterite nickel 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 and react at a stirring rate of 120r / min for 20min, add 20g of calcium oxide during this period to adjust the pH of the solution to be stable between 6 and 7, and obtain a composite additive after the reaction is completed;

[0079] (2) Mix the dried limonite-type laterite-nickel ore, coke and sodium silicate and then grind them until the particles with a size of ≤100 mesh account for 85wt of the total amount of limonite-type laterite-nickel ore, coke and sodium silicate %; Wherein, 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 laterite nickel ore green pellets with a diameter of 8-12 mm. The amount of composite additives added in the granulation process is the total amount of limonite type laterite nic...

Embodiment 2

[0084] (1) Preparation of composite additives:

[0085] Take 100mL of pickling waste liquid, add 20g of transitional laterite nickel ore, stir and react at a stirring rate of 120r / min for 20min, add 20g of calcium hydroxide during this period to adjust the pH of the solution to be stable between 6 and 7, and obtain a composite additive after the reaction is completed;

[0086] (2) Mix the dried limonite-type laterite-nickel ore, white coal and sodium carbonate and then grind them until the particles of ≤100 mesh account for 85wt of the total amount of limonite-type laterite-nickel ore, white coal and sodium carbonate % or so; wherein, the addition of white coal is 8wt% of the laterite nickel ore, and the addition of sodium carbonate is 4wt% of the laterite nickel ore. Then granulate on a disc granulator to obtain laterite nickel ore green pellets with a diameter of 8-12 mm. The amount of compound additives added during the granulation process is the total amount of limonite ty...

Embodiment 3

[0091] (1) Preparation of composite additives:

[0092] Take 100mL of pickling waste liquid, add 20g of transitional laterite nickel ore, stir and react at a stirring rate of 120r / min for 20min, add 20g of calcium hydroxide during this period to adjust the pH of the solution to be stable between 6 and 7, and obtain a composite additive after the reaction is completed;

[0093] (2) Mix the dried limonite-type laterite-nickel ore, lignite and sodium hydroxide and then grind them until the particles with a size of ≤100 mesh account for 85wt of the total amount of limonite-type laterite-nickel ore, lignite and sodium hydroxide %; Wherein, 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 laterite nickel ore green pellets with a diameter of 8 to 12mm. 20wt% composite additive; the obtained lateritic nickel ore green pellets were naturally cooled fo...

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Abstract

The invention provides a method for treating transition-type and limonite-type lateritic nickel ore with industrial pickling waste acid. The method mixes the transition type laterite nickel ore and industrial pickling waste acid, adds calcium-based powder to prepare a composite additive, mixes the obtained composite additive with limonite type laterite nickel ore, reducing agent and accelerator, and then makes balls, and after cooling and solidifying Then activate roasting and reduction roasting. After roasting, water quenching, crushing and magnetic separation, the nickel-iron alloy powder is finally obtained. The preparation of the composite additive described in the method makes full use of the oxides in the transition type laterite nickel ore, and simultaneously leaches the nickel and cobalt therein. In addition, the product generated by the neutralization reaction has the effect of rapid solidification and solidification, which solves the problems of low green pellet strength, poor pellet formation, low burst temperature, and the addition of bentonite to reduce the grade in the laterite nickel ore treatment process, and also reduces production. The cost is low, and the environmental pollution problem 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 transition-type and limonite-type laterite-nickel ore with industrial pickling waste acid, in particular to a method for treating transitional pickling waste liquid obtained from steel surface treatment type and limonite type lateritic nickel ore. 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 nickel in the world is used to produce stainless steel. With the rapid development of the stainless steel industry, the demand for nickel in the world is also increasing, and the supply is in short supply. At present, the nickel resources available for human development and utilization are limited...

Claims

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Application Information

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