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Silicon-magnesium laterite-nickel ore cold sintering ball and preparation method thereof

A technology for laterite nickel ore and laterite nickel, which is applied in the field of silicon-magnesia laterite nickel ore cold nodulation and its preparation, can solve the problems of high nickel content, complicated process, low recovery rate and the like, and achieves low nickel content in slag and uniform combustion. , good furnace condition

Inactive Publication Date: 2010-05-12
张玉山
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems existing in the prior art are that the process is complicated, the recovery rate is low, and the nickel content in the slag is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In the present embodiment, the laterite ore has a moisture content of 33.5%, and the weight ratio of other main components except water is 1.69% Ni, 14.96% Fe, 28.41% SiO 2 , 18.28% MgO, 0.05% Co, 1.12% Cr 2 o 3 .

[0019] Get 150 parts by weight of the laterite ore, dry it to make the moisture (including crystal water and free water) equal to or less than 20%; crush the silicon-magnesium laterite-nickel ore with a block diameter less than 30 mm and a block diameter greater than 60 mm until the particle size is equal to or less than 0.5mm; then mix the silicon magnesium laterite with 18.3 parts by weight of a consolidation agent with a particle size equal to or less than 0.5mm—sawdust; use a ball forming machine to cold-press the mixture into a diameter of 50mm and a strength of 200kg / cm 2 Si-magnesium laterite nickel ore cold nodules.

[0020] The furnace charge is composed of 150 parts by weight of laterite cold pellets and 4.0 parts by weight of limestone.

[002...

Embodiment 2

[0035] In the present embodiment, the laterite ore has a moisture content of 35.5%, and the weight ratio of other main components except water is 1.73% Ni, 10.13% Fe, 30.13% SiO 2 , 20.15% MgO, 0.03% Co, 1.36% Cr 2 o 3 .

[0036] Get the laterite ore R of 155 weight parts 2Dry it to make the moisture (including crystal water and free water) equal to or less than 20%; grind the silicon magnesium laterite nickel ore with a block diameter of less than 30mm and greater than 60mm to a particle size equal to or less than 0.5mm; The ore is mixed with 20.3 parts by weight of a consolidation agent with a particle size equal to or less than 0.5mm—sawdust; the mixture is cold-pressed into a diameter of 50mm with a ball forming machine and the strength is 200kg / cm 2 Si-magnesium laterite nickel ore cold nodules.

[0037] The furnace charge is composed of 155 parts by weight of laterite cold balls and 0.7 parts by weight of slagging agent-limestone.

[0038] During smelting, the charg...

Embodiment 3

[0051] In the present embodiment, the laterite ore has a moisture content of 32.4%, and the weight ratio of other main components except water is 1.78% Ni, 12.75% Fe, 31.13% SiO 2 , 13.13% MgO, 0.02% Co, 1.28% Cr 2 o 3 .

[0052] Get the laterite ore R of 148 weight parts 2 Dry it to make the moisture (including crystal water and free water) equal to or less than 20%; grind the silicon magnesium laterite nickel ore with a block diameter of less than 30mm and greater than 60mm to a particle size equal to or less than 0.5mm; The ore is mixed with a consolidation agent with a particle size equal to or less than 0.5mm—11.5 parts by weight of sawdust; the mixture is cold-pressed into a diameter of 50mm with a ball forming machine and the strength is 200kg / cm 2 Si-magnesium laterite nickel ore cold nodules.

[0053] The furnace charge is composed of 148 parts by weight of laterite ore and 13.1 parts by weight of slagging agent—limestone.

[0054] During smelting, the charge is ...

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Abstract

The invention discloses a silicon-magnesium laterite-nickel ore cold sintering ball concretely, which is characterized by being prepared from silicon-magnesium laterite-nickel raw ore and a consolidation agent, wherein the consolidation agent is selected from one or more of steel slag powder, wood chip, reed canes and paper scrap and accounts for 5-10% of the total weight; and the diameter of the cold sintering ball is 30-60mm and the strength is 50-200kg / cm2. A preparation method of the cold sintering ball comprises the following working procedures: (1) drying the silicon-magnesium laterite-nickel ore in air until moisture is smaller than or equal to 20%; (2) grinding the silicon-magnesium laterite-nickel ore until granularity is smaller than or equal to 0.5mm; (3) mixing the silicon-magnesium laterite-nickel ore with the consolidation agent with granularity less than or equal to 0.5mm; and (4) using a ball forming mill for cold pressing the mixture into silicon-magnesium laterite-nickel ore cold sintering ball with diameter of 30-60mm and strength of 50-200kg / cm2. The preparation method of the cold sintering ball has the advantages of good furnace conditions when smelting nickel, good slag flowability, good air permeability, uniform combustion, high bed output ability, low coke rate, and low nickel content of slag.

Description

technical field [0001] The invention relates to a nickel ore smelting method, and in particular provides a silicon magnesium laterite nickel ore cold pellet and a preparation method thereof. Background technique [0002] Nickel is widely used in stainless steel, electroplating, batteries and other fields due to its good mechanical strength, ductility and high chemical stability. At present, there are two types of nickel resources available for development and utilization, one is nickel oxide ore, also known as laterite nickel ore, and the other is nickel sulfide ore. The world's proven nickel resources are about 160 million tons, of which 30% are nickel sulfide ore. 70% is laterite nickel ore, and about 60% of nickel products come from sulfide ore. However, there are very few nickel sulfide resources in the world that can be developed in the near future, except for the Voisey bay nickel mine in Canada, and the nickel sulfide resource exploration and construction periods ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/243C22B1/244C22B23/02
CPCY02P10/20
Inventor 张玉山
Owner 张玉山
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