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Method for extracting nickel and cobalt from nickel laterite ore through caustic sludge and waste pickling liquid

A technology of laterite nickel ore and pickling waste liquid, which is applied in the field of resource recycling and mineral processing, can solve the problems of surrounding environmental hazards, and achieve the effects of reducing production costs, saving process costs, and excellent chlorination effect

Inactive Publication Date: 2016-06-01
马守栋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] It can be seen that if industrial waste such as soda ash slag and industrial waste acid are not treated, it will cause great harm to the surrounding environment

Method used

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  • Method for extracting nickel and cobalt from nickel laterite ore through caustic sludge and waste pickling liquid
  • Method for extracting nickel and cobalt from nickel laterite ore through caustic sludge and waste pickling liquid

Examples

Experimental program
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Effect test

Embodiment 1

[0064] (1) Preparation of composite additive: Take 10g of alkali slag and add it to 30ml of pickling waste liquid (that is, the solid-to-liquid ratio is 1:3), stir and react at a stirring rate of 120r / min for 30min, and obtain the composite additive after the reaction is completed;

[0065] (2) The composite additive is added to the transition type laterite nickel ore, wherein the transition type laterite nickel ore is crushed to ≤100 mesh particles and accounts for 80-90wt% of the total mass, and the addition of the composite additive is 1 / 2 of the transition type laterite nickel ore quality 30wt%, and then granulated on a disc granulator to obtain laterite nickel ore green pellets with a diameter of 8 to 12 mm, and the gained laterite nickel ore green pellets were allowed to stand and cool for 9 hours;

[0066] (3) placing the solidified laterite nickel ore raw pellets in a muffle furnace for chlorination and roasting at 1050° C. for 120 minutes, and obtaining alkaline pellet...

Embodiment 2

[0069](1) Preparation of composite additive: Take 10g of alkali slag and add it to 40ml of pickling waste liquid (that is, the solid-to-liquid ratio is 1:4), stir and react at a stirring rate of 120r / min for 30min, and obtain the composite additive after the reaction is completed;

[0070] (2) The composite additive is added to the transition type laterite nickel ore, wherein the transition type laterite nickel ore is crushed to ≤100 mesh particles and accounts for 80-90wt% of the total mass, and the addition of the composite additive is 1 / 2 of the transition type laterite nickel ore quality 40wt%, then granulating on a disc granulator to obtain laterite nickel ore green pellets with a diameter of 8 to 12 mm, and the gained laterite nickel ore green pellets were allowed to stand and cool for 8 hours;

[0071] (3) placing the solidified laterite nickel ore raw pellets in a muffle furnace for chlorination and roasting at 1000° C. for 100 min, and obtaining alkaline pellets after ...

Embodiment 3

[0074] (1) Preparation of composite additive: Take 10 g of alkali residue and add it to 50 ml of pickling waste liquid (that is, the solid-to-liquid ratio is 1:5), stir and react at a stirring rate of 120 r / min for 30 minutes, and obtain a composite additive after the reaction is completed;

[0075] (2) The composite additive is added to the transition type laterite nickel ore, wherein the transition type laterite nickel ore is crushed to ≤100 mesh particles and accounts for 80-90wt% of the total mass, and the addition of the composite additive is 1 / 2 of the transition type laterite nickel ore quality 50wt%, and then granulated on a disc granulator to obtain laterite nickel ore green pellets with a diameter of 8 to 12 mm, and the gained laterite nickel ore green pellets were allowed to stand and cool for 9 hours;

[0076] (3) placing the solidified laterite nickel ore green pellets in a muffle furnace for chlorination and roasting at 1050° C. for 80 minutes, and obtaining alkal...

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Abstract

The invention provides a method for extracting nickel and cobalt from nickel laterite ore through caustic sludge and waste pickling liquid. The method comprises the following steps that the caustic sludge is added into the waste pickling liquid, and the hybrid reaction is conducted, so that a composite additive is prepared; and the composite additive is added into the pretreated nickel laterite ore and mixed uniformly, prilling, standing and curing are conducted, then chloridizing roasting is conducted, alkaline pellets used for steelmaking are obtained, and nickel chloride and cobalt chloride powder are generated in the roasting process and recycled along with smoke. According to the composite additive adopted in the method, waste sludge, namely the caustic sludge, generated in the alkali making process and the industrial waste pickling liquid generated in the pickling process are sufficiently utilized, the environment protection problems in the alkali making and pickling industry are solved, calcium and magnesium in the caustic sludge are finally reserved in the pellets, and the alkalinity of the pellets is improved. Meanwhile, the composite additive has a rapid hardening and curing effect, and the problems that according to the nickel laterite ore treating technique, the strength of fresh pellets is low, prilling is poor, the decrepitation temperature is low, and the grade is lowered due to the fact that bentonite is added can be solved.

Description

technical field [0001] The invention belongs to the technical field of resource recycling and mineral processing, and relates to a method for extracting nickel and cobalt in laterite nickel ore by using alkali slag and pickling waste liquid, in particular to a method for using alkali slag and steel pickling produced in the production process of soda ash A method for extracting nickel and cobalt from laterite nickel ore by waste liquid. Background technique [0002] Soda ash as a basic bulk chemical product has contributed a lot to the progress of world industry since its birth at the end of the 19th century. From 2010 to 2014, my country's soda ash production capacity expanded from 26.4 million tons at the end of 2010 to 33 million tons in 2014, with an average annual growth rate of about 5.2%, becoming the world's largest soda ash producer. However, with the aura of "the world's largest", it is the first in the discharge of alkali slag. Although the proportion of soda ash...

Claims

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Application Information

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IPC IPC(8): C22B23/00C22B7/00
CPCC22B7/001C22B23/02Y02P10/20
Inventor 马守栋吴兆钰
Owner 马守栋
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