Method for strengthening sintering of high-proportion iron ore concentrate

An iron concentrate, high-proportion technology, applied in the field of strengthening high-proportion iron concentrate sintering, can solve the problems of failure to simultaneously strengthen fine-grained concentrate ore formation, and sinter strength cannot be improved, so as to increase equipment The effect of investment cost, promotion of ball formation and growth, and simple adjustment method

Active Publication Date: 2014-01-01
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned technologies are mainly strengthened from the perspective of granulation, and fail to simultaneously strengthen the mineralization of fine-grained concentrates, so the strength of sintered ore cannot be improved.

Method used

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  • Method for strengthening sintering of high-proportion iron ore concentrate
  • Method for strengthening sintering of high-proportion iron ore concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] When the total amount of iron ore concentrate accounts for 50% of the total iron ore, the sintering raw material is divided into two parts for granulation. The ore content accounts for 40% of the weight of the material. The Ca / Fe molar ratio of the raw material composed of quicklime, limestone, dolomite, and -0.5mm iron ore in the second part of the material is 0.4. The content of coke powder in the first part of the material is the second 1 / 2 of the coke powder content in the second part of the material. Granulate the first part of the material in a cylinder mixer for 4 minutes to make pellets of 1 to 8 mm; mix the pellets obtained in the first stage of granulation with the second part of the material, and granulate in a cylinder mixer for 3 minutes . After implementing the above strengthening measures, the utilization factor of the sintering machine has increased by 0.05t / (m 2 h), the yield rate increased by 1.58%, and the drum strength increased by 0.7%.

Embodiment 2

[0025] When the total amount of iron ore concentrate accounts for 80% of the total iron ore, the sintering raw material is divided into two parts for granulation. The ore content accounts for 45% of the weight of the material. The Ca / Fe molar ratio of the raw material composed of quicklime, limestone, dolomite, and -0.5mm iron ore in the second part of the material is 0.35. The content of coke powder in the first part of the material is the second 2 / 5 of the coke powder content in the second part of the material. Granulate the first part of the material in a cylinder mixer for 6 minutes to make pellets of 1 to 8 mm; mix the pellets obtained in the first stage of granulation with the second part of the material, and granulate in a cylinder mixer for 5 minutes . After implementing the above strengthening measures, the utilization factor of the sintering machine has increased by 0.11t / (m 2 h), the yield rate increased by 3.02%, and the strength of the drum increased by 1.53%. ...

Embodiment 3

[0027] When the total amount of iron ore concentrate accounts for 100% of the total iron ore, the sintering raw material is divided into two parts for granulation. After separating the first part of the material, the second part of the material The iron ore concentrate content of 0.5mm particle size accounts for 50% of the weight of the material. The Ca / Fe molar ratio of raw materials composed of quicklime, limestone, dolomite and -0.5mm particle size iron ore in the second part of the material is 0.3. The first part of the material The content of the medium coke powder is 1 / 3 of the content of the coke powder in the second part of the material. The first part of the material is made into pellets of 3 to 5 mm in a disc pelletizer; the pellets obtained in the first stage of granulation are mixed with the second part of the material, and granulated in a cylinder mixer for 6 minutes. After implementing the above strengthening measures, the utilization factor of the sintering mach...

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Abstract

The invention discloses a method for strengthening sintering of high-proportion iron ore concentrate. The sintering raw material is divided into two materials and then palletized. The first material comprises a part of the iron ore concentrate, quick lime and coke powder separated from the sintering raw material, first-stage palletizing is carried out on the first material, then second-stage palletizing is carried out on the first material and the second material, and the second material comprises a part of the iron ore concentrate, quick lime, coke powder, ore fines, lime stone, dolomite and return fines. By distributing the concentrate, the quick lime and the coke powder in the two materials reasonably, the purposes of palletizing strengthening and sintering mineralizing are achieved. For sintering of an iron mine with the iron ore concentrate accounting for 50-70 percent of the total mass of the iron core, after the strengthening technology is utilized, the utilization factor of a sintering machine is improved by 0.05-0.3t/(m<2>.h), the sinter yield is improved by 1-4 percent, the drum strength is improved by 0.5-4 percent, and the output index and the quality index of sintering of the high-proportion iron ore concentrate are improved.

Description

technical field [0001] The invention relates to a method for sintering iron concentrate, in particular to a method for strengthening the sintering of high proportion iron concentrate. technical background [0002] In recent years, my country's iron and steel industry has developed rapidly, and the huge steel production has consumed a huge amount of iron ore resources. At present, my country's high-quality iron ore resources are increasingly in short supply, mainly relying on imports from abroad. However, the high price of imported iron ore and high transportation costs are not conducive to reducing costs and increasing efficiency for my country's iron and steel enterprises. Therefore, improving the development and utilization efficiency of my country's own resources is an important measure to enhance the competitiveness of my country's iron and steel industry. [0003] my country is a country with large iron ore resources in the world. The iron ore reserves account for abo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16
Inventor 甘敏范晓慧陈许玲姜涛李光辉袁礼顺季志云余志元周阳王剑黄晓贤黄柱成郭宇峰杨永斌张元波李骞白国华许斌黄云松曾金林
Owner CENT SOUTH UNIV
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