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Method for producing sintering ore with iron ore concentrate as main iron materials

A production method and iron concentrate technology, applied in the field of sinter production, can solve the problems of high sintering fuel consumption, poor air permeability, and low sinter quality, so as to increase sintering output, strengthen mineralization performance, improve air permeability and sintering speed effect

Inactive Publication Date: 2016-06-29
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a sinter production method using iron concentrate as the main iron material, the purpose of which is to solve the problems of high sintering fuel consumption and low sinter quality caused by poor air permeability of sintering mixture when high proportion iron concentrate is sintered , so as to improve the strength and yield of sintered ore, and reduce the fuel consumption of iron concentrate sintering

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Composition A of iron concentrate, returned ore, coke powder, limestone, magnesite and quicklime, of which: 70% of iron concentrate, 11% of returned ore with a particle size of 3-5mm, 4% of coke powder with a particle size of less than 1mm, and 4% of coke powder with a particle size of 6.5% of limestone smaller than 1mm, 2.5% of magnesium stone with particle size smaller than 1mm, and 6% of quicklime. Add water to the mixture A, mix and granulate through an intensive mixer to obtain the mixture ball A, the alkalinity of which is 1.95.

[0020] Composition B of iron concentrate, returned ore, coke powder, limestone, magnesite and quicklime, of which: 71% of iron concentrate, 10% of returned ore with a particle size of less than 3mm, 3.9% of coke powder with a particle size of 1-5mm, and 7.6% of limestone with a particle size of 1-2mm, 2% of magnesium stone with a particle size of 1-2mm, and 5.5% of quicklime. Add water to the mixture B, mix and granulate with an intensi...

Embodiment 2

[0024] Composition A of iron concentrate, returned ore, coke powder, limestone, magnesite and quicklime, in which 68% of iron concentrate, 11% of returned ore with a particle size of 3-5mm, 4.5% of coke powder with a particle size of less than 1mm, and limestone with a particle size of less than 1mm 8.5%, the particle size is less than 1mm magnesium stone 2%, quicklime 6%. Add water to the mixture A, mix and granulate through a powerful mixer to obtain the mixture ball A, the alkalinity of which is 2.

[0025] Composition B of iron concentrate, returned ore, coke powder, limestone, magnesite and quicklime, in which 70% of iron concentrate, 8% of returned ore with a particle size of less than 3mm, 4.5% of coke powder with a particle size of 1-5mm 8.5% of 2mm limestone, 2% of magnesium stone with a particle size of 1-2mm, and 7% of quicklime. Add water to the mixture B, mix and granulate with an intensive mixer to obtain the mixture ball B, the alkalinity of which is 2.

[002...

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Abstract

The invention provides a method for producing sintered ore with iron concentrate as the main iron material. The iron concentrate, the returned ore with a particle size of 3-5 mm, and coke powder, limestone, magnesium stone, and quicklime with a particle size of less than 1 mm are added with water and then mixed vigorously. Machine-made mixture ball A; after adding water with iron concentrate, returned ore with a particle size of less than 3mm, coke powder with a particle size of 1-5mm, limestone with a particle size of 1-2mm, magnesium stone with a particle size of 1-2mm and quicklime, it is made by a strong mixer Mixture ball B: Mix mixture ball A, mixture ball B and coke powder with a particle size of less than 1mm evenly to form sinter mixture C, which is distributed on sintering equipment and sintered to obtain a finished sintered ore. The invention can improve the gas permeability and sintering speed of the sintering material layer, thereby increasing the output of iron concentrate sintering and reducing the fuel consumption of iron concentrate sintering; at the same time, it is beneficial to strengthen the mineralization performance of iron-containing raw materials and the generation of calcium ferrite, Improve the strength and yield of sintered ore.

Description

technical field [0001] The invention belongs to the technical field of ironmaking production, in particular to a sintered ore production method using iron concentrate as the main iron material. Background technique [0002] Iron ore is an important raw material for sinter production. The iron material for sintering in a certain iron factory is mainly divided into two parts, one is the iron concentrate powder produced by its own mine, and the other is imported rich ore powder, such as Brazil and Australian bonanza powder. In recent years, with the continuous expansion of domestic iron and steel production capacity, the demand for iron ore has continued to increase, resulting in an increase in the price of iron ore and an increase in the production cost of iron and steel enterprises. Therefore, many iron and steel enterprises have to increase the output of iron concentrate in their own mines , to ease the rise in steel costs. [0003] However, the self-produced iron concentr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16
Inventor 张辉周明顺刘帅翟立委刘杰徐礼兵
Owner ANGANG STEEL CO LTD
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