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Feeding method for smelting silicium magnesium laterite ore

A feeding method and technology of laterite ore, which is applied in the feeding field of smelting silicon-magnesium laterite ore, can solve the problems of low recovery rate, high nickel content, complicated process, etc., and achieve the effect of sufficient matte-making reaction and enhanced air permeability

Inactive Publication Date: 2009-02-04
CHAOYANG HAOTIAN NONFERROUS METAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem of the prior art is that the process is complicated, and when the vulcanizing agent is put into the blast furnace alone, the smelting reaction cannot be fully carried out, so the recovery rate is low (up to 85%), and the nickel content in the slag is high (up to 0.5%)

Method used

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  • Feeding method for smelting silicium magnesium laterite ore
  • Feeding method for smelting silicium magnesium laterite ore
  • Feeding method for smelting silicium magnesium laterite ore

Examples

Experimental program
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Effect test

Embodiment 1

[0049] Laterite ore R in the present embodiment 1 Its water content is 33.5%, see Table 2 for other ingredients except water.

[0050] Get the laterite ore R of 150 weight parts 1 After being sieved through a sieve with an aperture of 40mm, the first mass part M1 with a block diameter of less than 40mm and the second mass part M2 with a block diameter greater than 40mm are obtained respectively, and the second mass part M2 is broken into fragments with a particle size less than 80mm; 18.3 parts by weight of gypsum powder were mixed with the first mass part M1 and placed in the brick making machine to make adobe. The strength and density of the adobe measured are listed in Table 3.

[0051] Take 4.1 parts by weight of limestone as flux.

[0052] The charge composition is 150 parts by weight of laterite ore, 18.3 parts by weight of gypsum powder, and 4.0 parts by weight of limestone.

[0053] During smelting, the furnace charge is sent into the blast furnace at a rate of 0.8t...

Embodiment 2

[0058] Laterite ore R in the present embodiment 2 Its water content is 31%, see Table 2 for other ingredients except water.

[0059] Get the laterite ore R of 145 weight parts 2 After being sieved through a sieve with an aperture of 50 mm, the first mass part M1 with a block diameter of less than 40 mm and the second mass part M2 with a block diameter greater than 40 mm were obtained, and the second mass part M2 was broken into fragments with a particle size less than 80 mm; 16.7 parts by weight of gypsum powder were mixed with the first mass part M1 and placed in the brick making machine to make adobe. The strength and density of the adobe measured are listed in Table 3.

[0060] Take 0.7 parts by weight of limestone as a flux.

[0061] The charge composition is 145 parts by weight of laterite, 16.7 parts by weight of gypsum powder, and 0.3 parts by weight of limestone.

[0062]During smelting, the furnace charge is sent into the blast furnace at a rate of 0.8tph (ton / hour...

Embodiment 3

[0067] Laterite ore R in the present embodiment 3 Its water content is 35.5%, see Table 2 for other ingredients except water.

[0068] Get the laterite ore R of 155 weight parts 3 After being sieved through a sieve with an aperture of 40mm, the first mass part M1 with a block diameter of less than 40mm and the second mass part M2 with a block diameter greater than 40mm were obtained respectively, and the second mass part M2 was broken into fragments with a particle size less than 80mm; 20.3 parts by weight of gypsum powder were mixed with the first mass part M1 and placed in a brick making machine to make adobe. The strength and density of the adobe measured are listed in Table 3.

[0069] The charge is composed of 150 parts by weight of laterite ore and 20.3 parts by weight of gypsum powder.

[0070] During smelting, the furnace charge is sent into the blast furnace at a rate of 0.8tph (ton / hour), coke is sent into the blast furnace at 0.2tph for reaction, and the air volum...

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Abstract

The invention discloses a feeding method for smelting silicon-magnesium laterite, which comprises the following steps: a) coke and / or anthracite is put into a blast furnace (101); b) furnace burden are put into the blast furnace (101) to be covered on the coke and / or anthracite, the furnace burdens comprise lumps and fusing agent, and the lumps comprise silicon-magnesium laterite and vulcanizing agent. After the silicon-magnesium laterite and the vulcanizing agent are directly made into the lumps and then are put into the blast furnace, the lumps are dried and roasted in the blast furnace so that most of free water and crystal water in the lumps is removed, a large number of holes are left, and thus the ventilation property is improved. Matte formation reaction can be carried out more completely under the condition of fully contact of the silicon-magnesium laterite with the vulcanizing agent. In the invention, the coke and / or anthracite, the fusing agent and the lumps are further added from the center of the top of the blast furnace to facilitate the large lumps to flow to the side wall of a furnace body, and thus the blast furnace can keep the good ventilation to avoid furnace accretion.

Description

technical field [0001] The invention relates to a feeding method for smelting ore, in particular to a feeding method for smelting silicon-magnesium laterite ore. 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% are 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 are long, making development an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B23/02
Inventor 高占奎李明张本林高海明崔明飞
Owner CHAOYANG HAOTIAN NONFERROUS METAL
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