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Composite lean iron ore pre-separation production system

A production system and iron ore technology, applied in the field of compound lean iron ore pre-selection production system, can solve the problems of low iron content and complicated production steps in iron ore, and achieve high iron content, good roasting effect and stable quality Effect

Inactive Publication Date: 2019-01-04
ZAOZHUANG SNKSAN INTELLIGENT MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the existing compound lean iron ore pre-selection production method, the production steps are complicated, and the iron content of the obtained iron ore is relatively low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A compound lean iron ore pre-selection production system, the specific steps are:

[0018] S1, the material selection is to collect composite lean iron ore in the ore stope, the iron content of the raw composite lean iron ore is 27%, and the SiO2 content is 27%;

[0019] S2, coarse crushing, coarsely crushing the raw material composite lean iron ore in a coarse crusher, and the ore is ground to a particle size of more than 85%; the coarse crusher is a jaw crusher produced by Zhengzhou Yiding Environmental Protection Equipment Co., Ltd., and the output particle size 40mm, power 55KW;

[0020] S3, heating, heat the product in S1 in a closed device, and continuously feed oxygen, heat to 920°C at a rate of 50°C per minute, and maintain the temperature for 15 minutes to obtain drying, preheating and oxidation process finished gravel;

[0021] S4, finely crushing, washing and finely crushing the gravel, and putting the product in S2 into a fine crusher, which is a high-effi...

Embodiment 2

[0025] A compound lean iron ore pre-selection production system, the specific steps are:

[0026] S1, the material selection is to collect composite lean iron ore in the ore stope, the iron content of the raw composite lean iron ore is 28%, and the SiO2 content is 32%;

[0027] S2, coarse crushing, coarsely crushing the raw material composite lean iron ore in a coarse crusher, and the ore is ground to a particle size of more than 85%; the coarse crusher is a jaw crusher produced by Zhengzhou Yiding Environmental Protection Equipment Co., Ltd., and the output particle size 50mm, power 55KW;

[0028] S3, heating, heat the product in S1 in a closed device, and continuously feed oxygen, heat to 922°C at a rate of 44°C per minute, and maintain the temperature for 16min to obtain drying, preheating and oxidation process finished gravel;

[0029] S4, finely crushing, washing and finely crushing the gravel, and putting the product in S2 into a fine crusher, which is a high-efficienc...

Embodiment 3

[0033] A compound lean iron ore pre-selection production system, the specific steps are:

[0034] S1, the material selection is to collect composite lean iron ore in the ore stope, the iron content of the raw composite lean iron ore is 30%, and the SiO2 content is 35%;

[0035] S2, coarse crushing, coarsely crushing the raw material composite lean iron ore in a coarse crusher, and the ore is ground to a particle size of more than 85%; the coarse crusher is a jaw crusher produced by Zhengzhou Yiding Environmental Protection Equipment Co., Ltd., and the output particle size 80mm, power 55KW;

[0036] S3, heating, heat the product in S1 in a closed device, and continuously feed oxygen, heat to 928°C at a rate of 48°C per minute, and maintain the temperature for 17min to obtain drying, preheating and oxidation process finished gravel;

[0037] S4, finely crushing, washing and finely crushing the gravel, and putting the product in S2 into a fine crusher, which is a high-efficienc...

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PUM

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Abstract

The invention discloses a composite lean iron ore pre-separation production system. A method particularly comprises the steps that S1, material selection is conducted, wherein composite lean iron oreis collected in an ore stope; S2, coarse crushing is conducted, wherein the raw material composite lean iron ore is crushed in a coarse crusher, and ore grinding is conducted until the granularity accounts for 85% or above; S3, heating is conducted, wherein a product in S1 is put in a closed device to be heated, oxygen is introduced continuously, heating is conducted at the rate being 40-50 DEG C / min to reach 920-930 DEG C, the temperature is kept for heating 15-20 min, and dried and preheated gravel completed in the oxidation process is obtained; S4, fine crushing is conducted, wherein the gravel is subjected to washing and fine crushing, and the product in S2 is put into a fine crusher; S5, magnetic separation is conducted, wherein the gravel obtained after fine crushing in S3 is subjected to magnetic separation through a magnetic separator, after magnetic separation, the gravel is discarded, and the product can be obtained. Accordingly, the needed raw materials are easy to obtain, the preparation technology is simple, the iron content of prepared iron ore is high, and the roasting effect is good.

Description

technical field [0001] The invention relates to a roasting process method of iron ore, in particular to a pre-selection production system of composite lean iron ore. Background technique [0002] Lean iron ore refers to iron ore with low iron grade, generally containing 30% to 40% iron (or less). It contains a large amount of gangue, and the amount of slag in the smelting process is large, thus increasing fuel consumption and reducing equipment productivity. Sometimes gangue contains harmful elements, affecting the quality of steel. Before the lean iron ore is put into the furnace, it needs to be processed to increase the iron content, reduce the gangue content and harmful element content, and become iron concentrate. It is then made into artificial rich ore for iron and steel smelting. Iron ore with low iron grade generally contains 30% to 40% iron (or less). It contains a large amount of gangue, and the amount of slag in the smelting process is large, thus increasing f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C21/00B02C23/08C22B1/00
CPCB02C21/00B02C23/08C22B1/00
Inventor 孙启祥马驰孙法虎
Owner ZAOZHUANG SNKSAN INTELLIGENT MACHINERY CO LTD