Sintered ore containing specular hematite and preparation method of sintered ore

A technology for specularite and sintered ore, which is applied in the field of sintered ores containing specularite and its preparation, can solve the problems of poor hydrophilicity and poor reactivity of specularite, and achieves high cohesive crystal strength, improved utilization rate, and full utilization of specularite. The effect of resources

Inactive Publication Date: 2015-03-25
WUHAN IRON & STEEL (GROUP) CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the deficiencies in the prior art, to provide a method that can not only solve the problems of poor hydrophilicity and poor reactivity of specularite, so that the utilization rate of specularit

Method used

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  • Sintered ore containing specular hematite and preparation method of sintered ore
  • Sintered ore containing specular hematite and preparation method of sintered ore
  • Sintered ore containing specular hematite and preparation method of sintered ore

Examples

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Example Embodiment

[0015] Example 1

[0016] A sintered ore containing specularite, its raw material composition and weight percentage content are: specularite with particle size ≤ 1mm: 55%, returned ore with particle size ≤ 5mm: 32%, fuel with particle size ≤ 4mm: 3.7%, particle size Flux ≤ 4mm: 9.3%, plus 4.5% of the total weight of the above raw materials of quicklime with an activity of 250.

[0017] Preparation steps:

[0018] 1) First mix 55% specularite with particle size ≤ 1mm and 4.5% quicklime with activity degree 250, then add water according to 6% of the total amount of the mixture and stir evenly;

[0019] 2) Put the mixed slurry material into the disc machine for granulation; the disc machine granulation time is 6 minutes; after testing, its strength reaches 1.5N / / cm 2 ,stand-by;

[0020] 3) First mix 32% of the returned ore with a particle size of ≤5mm, 3.7% of the fuel with a particle size of ≤4mm, and 9.3% of the flux with a particle size of ≤4mm; then mix with the p...

Example Embodiment

[0023] Example 2

[0024] A sintered ore containing specularite, its raw material composition and weight percentage content are: specularite with particle size ≤ 1mm: 60%, returned ore with particle size ≤ 5mm: 28%, fuel with particle size ≤ 4mm: 4%, particle size Flux ≤ 4mm: 8%, plus 1.2% organic bentonite based on the total weight of the above raw materials.

[0025] Preparation steps:

[0026] 1) First mix 60% specularite with particle size ≤ 1mm and 1.2% organic bentonite, then add water according to 7% of the total amount of the mixture and stir evenly;

[0027] 2) Put the mixed slurry material into the disc machine for granulation; the disc machine granulation time is 8 minutes; after testing, its strength reaches 1.2N / / cm 2 ,stand-by;

[0028] 3) First mix 28% of the returned ore with a particle size of ≤5mm, 4% of the fuel with a particle size of ≤4mm, and 8% of the flux with a particle size of ≤4mm; then mix with the prepared specularite particles; and sin...

Example Embodiment

[0031] Example 3

[0032] A sintered ore containing specularite, its raw material composition and weight percentage content are: specularite with particle size ≤ 1mm: 45%, returned ore with particle size ≤ 5mm: 21%, fuel with particle size ≤ 4mm: 3.5%, particle size Flux ≤ 4mm: 9.5%, other iron ore with particle size ≤ 10mm 21%, plus 2% organic bentonite based on the total weight of the above raw materials.

[0033] Preparation steps:

[0034] 1) First mix 45% specularite with particle size ≤ 1mm and 2% organic bentonite, then add water according to 8% of the total amount of the mixture and stir evenly;

[0035] 2) Put the mixed slurry material into the disc machine for granulation; the disc machine granulation time is 12 minutes; after testing, its strength reaches 1.1N / / cm 2 ,stand-by;

[0036] 3) Mix 21% of returned ore with a particle size of ≤5mm, 3.5% of fuel with a particle size of ≤4mm, 9.5% of flux with a particle size of ≤4mm, and 21% of other iron ores w...

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Abstract

The invention discloses sintered ore containing specular hematite. The sintered ore comprises the following raw materials in percentage by weight: 2-60 percent of specular hematite of which the granularity is less than or equal to 1mm, 20-40 percent of return mine of which the granularity is less than or equal to 5mm, 3-5 percent of fuel of which the granularity is less than or equal to 4mm, 8-15 percent of flux of which the granularity is less than or equal to 4mm, and an additional adhesive which accounts for 0.5-6 percent of the total weight of the raw materials. The preparation method comprises the following steps: uniformly mixing the specular hematite of which the granularity is less than or equal to 1mm with the adhesive, adding water, and uniformly stirring; granulating in a disc machine or briquetting into blocks by using a briquetting machine; uniformly mixing the return mine of which the granularity is less than or equal to 5mm, the fuel of which the granularity is less than or equal to 4mm and the flux of which the granularity is less than or equal to 4mm; uniformly mixing the mixture prepared in the previous step and the prepared specular hematite grains or blocks; and sintering according to a conventional sintering process. According to the sintered ore disclosed by the invention, the problem that the specular hematite is low in hydrophilcity and reactivity can be solved, so that the utilization rate of the specular hematite is greatly improved, the characteristics, such as high temperature performance and high bonding strength, of the specular hematite are fully utilized, the prepared sintered ore can completely meet the requirement, the wastes are changed into valuable materials, and the resources are fully utilized.

Description

technical field [0001] The invention relates to a sintered ore and a preparation method, in particular to a sintered ore containing specularite and a preparation method thereof. Background technique [0002] According to the research and analysis of the world's iron ore reserves, Brazil, Canada, Venezuela, Xuanhua in Hebei, Ningxiang in Hunan, Anshan in Liaoning and other places in China have rich iron ore reserves. The specularite after mine treatment is a kind of iron ore with fine particle size composition, concentrated particle size distribution, small specific surface area, poor hydrophilicity and high liquid phase formation temperature. If it is directly used for granulation, it will affect the gas permeability of the sintering process, and it is difficult to melt during the sintering process, and it is distributed on the edge of the liquid phase generated during the sintering process, which affects the output and quality of the sintering process. Used extensively in ...

Claims

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Application Information

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IPC IPC(8): C22B1/242C22B1/16
CPCC22B1/16
Inventor 李军史先菊冯红云肖扬莫亚平孙庆星杨志范维国张树华张建刚
Owner WUHAN IRON & STEEL (GROUP) CORP
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