Iron-containing solid byproduct of iron making by smelting reduction and manufacturing method thereof

A production method and by-product technology, which are applied in the field of smelting reduction iron-smelting iron-containing solid by-products and their production fields, can solve problems such as inability to meet strength requirements, and achieve the effects of realizing the cost of molten iron, avoiding a large amount of accumulation, and increasing the output of molten iron.

Active Publication Date: 2012-09-05
XINJIANG BAYI IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the experimental exploration stage of iron-containing solid by-products of smelting reduction ironmaking, pelletizing and counter-roll briquetting methods were used, and it was foun

Method used

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  • Iron-containing solid byproduct of iron making by smelting reduction and manufacturing method thereof
  • Iron-containing solid byproduct of iron making by smelting reduction and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0050] Example 1

[0051] Gas mud: iron ore powder under sieve: dust removal powder (dry basis, weight) 20%: 75%: 5%, binder, additional, 10%, water, additional, adjusted to 8%. The above-mentioned materials are mixed, and the mixture is compressed by a hydraulic forming machine with a pressure of 10 MPa and a pressurization time of 10 s. The mixture is placed in the air for natural curing for 28 days. The binder is 90% ordinary Portland cement + 10% high alumina cement, the particle size of the iron ore powder under the sieve is less than 6.3mm, and the content of more than 1mm is 70%.

[0052] After curing, the compressive strength of the agglomerates is 1920N / piece, and the strength reaches the YB / T005-2005 Grade II iron pellet standard, and meets the strength requirements of directly adding to the gasifier (>1800N / piece). It can be fed into the gasifier together with lump coal and coke through a coal spiral. Based on the use of 300 tons of agglomerates a day, 136 to 143 tons o...

Example Embodiment

[0053] Example 2

[0054] Gas mud: iron ore powder under sieve: dust removal powder (dry basis, weight) 37%: 60%: 3%, binder, additional, 18%, water, additional, adjusted to 11%. The above-mentioned materials are mixed, and the mixture is compressed by a hydraulic forming machine with a pressure of 10 MPa and a pressurization time of 10 s. The mixture is placed in the air for natural curing for 28 days. The binder is 80% ordinary Portland cement + 20% slag cement, and the particle size of iron ore powder under the sieve is less than 6.3mm, and the content of more than 1mm is 70%.

[0055] After curing, the compressive strength of the agglomerates is 1956N / piece, and the strength reaches the standard of YB / T005-2005 Class II iron pellets, and meets the strength requirements of directly adding to the gasifier (>1800N / piece). It can be fed into the gasifier together with lump coal and coke through a coal spiral. Based on the use of 300 tons of briquettes per day, 122 to 131 tons of i...

Example Embodiment

[0056] Example 3

[0057] Gas mud: iron ore powder under sieve: dust removal powder (dry basis, weight) 43%: 53%: 4%, binder, additional, 22%, water, additional, adjusted to 12%. The above-mentioned materials are mixed, and the mixture is compressed by a hydraulic forming machine with a pressure of 10 MPa and a pressurization time of 10 s. The mixture is placed in the air for natural curing for 28 days. The binder is 80% ordinary Portland cement + 10% high alumina cement + 10% lime, and the particle size of the iron ore powder under the sieve is less than 6.3mm, and the content of more than 1mm is 70%.

[0058] After curing, the compressive strength of the agglomerates is 1868N / piece, which meets the smelting standard YB / T005-2005 Grade II iron pellet standard, and meets the strength requirements of directly adding to the gasifier (>1800N / piece). It can be fed into the gasifier together with lump coal and coke through a coal spiral. Based on the use of 300 tons of briquettes per d...

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Abstract

The invention relates to an iron-containing solid byproduct of iron making by smelting reduction and a manufacturing method thereof. The byproduct comprises the following components in percentage by weight: 20-75% of dry basis of gas mud, 20-75% of dry basis of iron ore minus undersize powder, 1-5% of dedusting powder dry basis, 10-30% of binding agent and 8-15% of water. The byproduct and the manufacturing method provided by the invention finally realize the reutilization of smelted ironmaking sludge, can manufacture the iron-containing product conglomerations for smelting reduction, reduce the molten iron cost, and reduce environmental pollution.

Description

technical field [0001] The invention belongs to the field of smelting reduction ironmaking, and relates to an iron-containing solid by-product of smelting reduction ironmaking and a production method thereof. Background technique [0002] The smelting reduction ironmaking process is an environmentally friendly non-blast furnace ironmaking process, and its main raw materials are pellets, lump ore, lump coal and a small amount of coke. Since smelting reduction ironmaking cancels the pre-iron processes such as sintering and coking, compared with blast furnace ironmaking, the exhaust gas of SO 2 , NOX, dust reduced by 95%, 87%, 64%; phenol and sulfide in wastewater reduced by 99%, ammonia reduced by 87%. However, while the emission of harmful substances in waste gas and wastewater has been greatly reduced, the recovery of its iron-containing solid by-products has become a new problem because there is no sintering or pelletizing process. [0003] Table 1 Properties and amount o...

Claims

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Application Information

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IPC IPC(8): C22B1/248C22B1/243C21B11/00C21B11/02
Inventor 李建熊林赵晓岩石洪志朱锦明林金嘉彭新李咸伟王如意
Owner XINJIANG BAYI IRON & STEEL
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