Manufacturing technique for enriching -iron

A production process and enrichment technology, applied in blast furnaces, furnace types, furnaces, etc., to achieve high economic benefits, ensure normal production, and alleviate the contradiction between supply and demand

Inactive Publication Date: 2006-01-25
河南省鑫冶科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

How to use hematite (Fe 2 o 3 ) especially the use of sulfuric acid slag, which is modified into enriched iron by scientific production technology and used as raw material for blast furnace ironmaking, so as to reduce ironmaking cost, make up for the serious shortage of iron ore resources, and turn waste into treasure. subject, but so far there are no reports on it

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The production technique of enriching iron described in the present invention can be:

[0038] In the first step, the hematite (Fe 2 o 3 ) or sulfuric acid slag pulverization, the particle size is 1-100 mesh;

[0039] In the second step, the first step gain is mixed with additives, and its weight ratio is:

[0040] Hematite (Fe 2 o 3 ) or sulfuric acid slag powder: additive = 10: 3-8;

[0041] The additive is a mixture of fixed carbon (C) and calcium oxide (CaO); its weight ratio is: fixed carbon (C): calcium oxide (CaO) = 10: 0.1-2;

[0042] The third step is to make the product obtained in the second step into a ball or put it in a sagger, and then send it into various kilns and heat it to 1300-1400°C. After heating for 60-80 hours, it will leave the kiln to enrich iron.

Embodiment 2

[0044] The production technique of enriching iron described in the present invention can also be:

[0045] In the first step, the hematite (Fe 2 o 3 ) or crushed sulfuric acid slag, with a particle size of 100-150 mesh;

[0046] In the second step, the first step gain is mixed with additives, and its weight ratio is:

[0047] Hematite (Fe 2 o 3 ) or sulfuric acid slag powder: additive = 10: 8-11;

[0048] Described additive is the mixture of fixed carbon (C) and calcium oxide (CaO); Its weight ratio is:

[0049] Fixed carbon (C):calcium oxide (CaO)=10:2-4;

[0050] In the third step, the product obtained in the second step is made into a ball or packed in a sagger, and then sent to various kilns and heated to 900-1300°C for 30-50 hours to enrich iron.

Embodiment 3

[0052] The production technique of enriching iron described in the present invention can also be:

[0053] In the first step, the hematite (Fe 2 o 3 ) or crushed sulfuric acid slag, with a particle size of 150-300 mesh;

[0054] In the second step, the first step gain is mixed with additives, and its weight ratio is:

[0055] Hematite (Fe 2 o 3 ) or sulfuric acid slag powder: additive = 10: 11-15;

[0056] Described additive is the mixture of fixed carbon (C) and calcium oxide (CaO); Its weight ratio is:

[0057] Fixed carbon (C):calcium oxide (CaO)=10:4-6;

[0058] In the third step, the product obtained in the second step is made into a ball or packed in a sagger, and then sent to various kilns and heated to 700-900°C. After heating for 10-20 hours, the iron is enriched when it comes out of the kiln.

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Abstract

This invention discloses a production technology for an iron glance modified enriched iron including the following steps:1. crushing Fe2O3 or sulfate slag powders to size 1-300 mesh 2. mixing materials from 1 with additives in the following weight ratio: Fe2O3 or sulfate slag powder: additive=10:3-15, said additive is a mixture of C and CaO with the weight ratio of C:CaO=10:0.1-6 3. processing mixtures of subjects from the second step and additives to get balls or to mount them into a container to be sent to stove and heated to 700-1400deg.C for 10-80hr to get the enriched iron Fe3O4.

Description

Technical field: [0001] The invention relates to the field of ironmaking, in particular to a production process for enriching iron. Background technique: [0002] The main raw material for ironmaking blast furnaces is iron ore. According to the national industry standard, the iron content of iron ore should be more than 62% before it can be used as raw material for blast furnace ironmaking, so it is required to beneficiate the iron ore entering the blast furnace. With the rapid development of my country's economy, the demand for iron ore is increasing, and the mining of iron ore can no longer meet the needs of iron-making enterprises. Hematite (Fe 2 o 3 ) has large reserves, low price, and is easy to mine, but because of its low iron content, it is difficult to beneficiate and is difficult to use in ironmaking blast furnaces. What's more, the sulfuric acid slag discharged by sulfuric acid production enterprises is not used as waste, and the composition of the waste is ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B13/00C22B1/02C21B5/00
Inventor 孙殿卿
Owner 河南省鑫冶科技股份有限公司
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