Method for manufacturing high-iron manganese ore composite sintering ores

A technology for sintering ore and high-speed iron, which is applied to the preparation of high-iron-manganese ore composite sinter and the field of producing self-fluxing or fluxing high-iron-manganese sintered ore, which can solve the problems of single consolidation ore-forming mode, and achieve the effect of good strength and metallurgical properties.

Active Publication Date: 2016-02-17
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional sintering and pelletizing methods are difficult to adapt to changing raw material conditions, which has become a bottleneck restricting the development of charge preparation technology.
As we all know, different iron ore raw materials should be ore-formed according to their own characteristics and properties, but the current high-alkalinity sintering method is mainly based on liquid-phase consolidation, and the acid pellet method is mainly based on solid-phase consolidation. Single mode

Method used

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  • Method for manufacturing high-iron manganese ore composite sintering ores
  • Method for manufacturing high-iron manganese ore composite sintering ores

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The ferromanganese ore concentrate (with a particle size of -200mm particle size accounting for 85% by mass and a specific surface area of ​​1200cm 2 / g), finely ground coke powder (with a particle size of -200mm, the mass percentage is 80%, and the specific surface area is 2000cm 2 / g), binder (bentonite or others) are used as raw materials to prepare pellets, and the particle size of the pellets is 5-8mm, wherein the dry weight of coke powder accounts for 5% of the dry weight of the pellet mixture, and quicklime, white cloud The tribasic alkalinity of the pellets is adjusted to be 0.05; the ferromanganese ore powder, flux, coke powder, and returned ore are used as raw materials, and the pellets are obtained by mixing and granulating, wherein the dry basis weight of the coke powder accounts for 10% of the dry basis mass of the pellets 7.0%, with quicklime, limestone, and dolomite to adjust the ternary alkalinity of the granular material to 1.61, and return 20% to the o...

Embodiment 2

[0033] The high-iron manganese ore concentrate (with a particle size of -200mm particle size accounting for a mass percentage of 88% and a specific surface area of ​​1320cm 2 / g), finely ground coke powder (with a particle size of -200mm, the mass percentage is 83%, and the specific surface area is 2100cm 2 / g), binder, (bentonite or others) as raw materials to prepare pellets, the pellet particle size is 5 ~ 8mm, wherein the coke powder dry basis weight accounts for 1% of the pellet mixture dry basis mass, with quicklime, Dolomite adjusts the ternary basicity of the pellets to 0.15; the ferromanganese ore powder, flux, and coke powder are returned to the ore as raw materials, and the pellets are obtained by mixing and granulating, wherein the dry weight of the coke powder accounts for 10% of the dry weight of the pellets 10%, with quicklime and dolomite to adjust the ternary alkalinity of the granular material to 1.70, and return 20% to the ore. Then the pellets and pellets ...

Embodiment 3

[0035] The ferromanganese ore concentrate (with a particle size of -200mm particle size accounting for 85% by mass and a specific surface area of ​​1200cm 2 / g), finely ground coke powder (with a particle size of -200mm, the mass percentage is 80%, and the specific surface area is 2000cm 2 / g), binder (bentonite or others) are used as raw materials to prepare pellets, and the particle size of the pellets is 5-8mm, wherein the dry weight of coke powder accounts for 3.5% of the dry weight of the pellet mixture, and quicklime, white cloud The tribasic alkalinity of the pellets is adjusted to be 0.06; the ferromanganese ore powder, flux, and coke powder are returned to the ore as raw materials, and the pellets are obtained by mixing and granulating, wherein the dry weight of the coke powder accounts for 7.5% of the dry weight of the pellets. %, with quicklime, limestone, and dolomite to adjust the ternary alkalinity of the granular material to 1.73, and return 20% to the ore. The...

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Abstract

The invention provides a method for manufacturing high-iron manganese ore composite sintering ores. The method includes the following steps that firstly, after raw materials including high-iron manganese ore concentrates, finely-ground coke powder, bentonite and a fusing agent are evenly mixed, and a pellet material is made, wherein according to the mass ratio of all the raw materials, the ternary basicity of the pellet material satisfies the inequation of 0<(CaO+MgO)/SiO2<=0.4; secondly, the raw materials including high-iron manganese ore powder, the fusing agent and the coke powder are evenly mixed, and granules are made, wherein according to the mass ratio of all the raw materials, the ternary basicity of the granules satisfies the inequation of 1.6<=(CaO+MgO)/SiO2<=2.4; and thirdly, the pellet material obtained in the first step and the granules obtained in the second step are evenly mixed, material distribution, ignition, sintering and cooling are sequentially conducted, and the composite sintering ores with the basicity ranging from 0.4 to 1.6 are obtained. The method can be suitable for manufacturing of the sintering ores through various raw materials, and the manufactured ferromanganese sintering ores have good strength and metallurgical performance.

Description

technical field [0001] The invention relates to a method for preparing high-iron-manganese ore composite sintered ore, in particular to a method for producing self-fluxing or flux-based high-iron-manganese sintered ore, and belongs to the technical field of metallurgical charge preparation. Background technique [0002] Manganese is an important strategic resource. 90% of manganese is consumed in the iron and steel industry as a deoxidizer and desulfurizer for molten steel and alloying elements, and 10% is used in other related industries. The cumulative proven reserves of manganese ore in my country are 643.51 million tons, and the retained reserves are 592.04 million tons. They are mainly distributed in Guangxi, Hunan, Guizhou, Sichuan, Liaoning, Yunnan and other provinces and regions, accounting for 90% of the total reserves of manganese ore resources in the country. [0003] At present, with the development of the economy and industry, especially the development of the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16C22B47/00
CPCC22B1/16C22B47/00
Inventor 姜涛张元波李光辉刘兵兵游志雄苏子键范晓慧黄柱成郭宇峰杨永斌李骞陈许玲彭志伟甘敏徐斌杜明辉陈迎明刘继成欧阳学臻陈军
Owner CENT SOUTH UNIV
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