Chemical additive for pulverized coal injection in blast furnace

A blast furnace injection coal and additive technology, applied in the direction of fuel additives, blast furnace, blast furnace details, etc., can solve the problems of destroying the supporting effect of the skeleton, destroying the reasonable distribution and utilization rate of blast furnace gas, and irregular furnace conditions, etc.

Inactive Publication Date: 2006-09-06
刘虎生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Blast furnace pulverized coal injection can also use chemical additives to increase the combustion speed and combustion efficiency of coal injection, thereby increasing the coal injection ratio, but the blast furnace coal injection additives cannot contain K, Na and other alkali metals, which will bring harmful elements to blast furnace ironmaking. Circulation and enrichment in the blast furnace will promote the dissolution reaction of coke, destroy the skeleton support, penetrate into the gap of the furnace lining, shorten the life of the furnace lining, and form nodules in the blast furnace to destroy the reasonable distribution and utilization of blast furnace gas, resulting in poor furnace conditions. Increased focal ratio

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Effective component content (percentage by weight): 28% of oxidant (50% of barium manganate, 50% of calcium nitrate); 21% of catalyst (30% of ferrocene, 70% of manganese dioxide); 47% of combustion aid (waste rubber powder); Passivator 4% (cobalt chloride).

Embodiment 2

[0018] The effective component content (percentage by weight) is: 30% of oxidizing agent (30% of barium manganate, 30% of calcium nitrate, 40% of cerium nitrate); 20% of catalyst (50% of ferrocene, 50% of manganese dioxide); combustion aid 45% (waste rubber powder); 5% passivator (50% cobalt chloride, 50% indium trichloride).

Embodiment 3

[0020] Effective component content (percentage by weight): oxidant 32% (barium manganate 60%, cerium nitrate 40%); Catalyst 22% (ferrocene 40%, manganese dioxide 60%); Combustion aid 43% (plastic powder ); Passivator 3% (indium trichloride).

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Abstract

The invention relates to a chemical additive for pulverized coal injection in blast furnace, which is a powder form mixture having a grain size greater than 80 meshes, its constituents include (by weight percent) oxidizing agent 20-40%, catalyst 15-25%, combustion adjuvant 20-25%, and passivating agent 1-15%. The additive contains no harmful elements to iron-smelting, and can appreciably improve combustion behavior for the powdered coal.

Description

technical field [0001] The invention relates to a chemical additive for pulverized coal injection in a blast furnace, which is mainly used for increasing the coal injection ratio, strengthening the coke skeleton support function, improving the air permeability of the blast furnace, inhibiting the low-temperature reduction and pulverization of the iron-containing charge, and promoting the smooth progress of the furnace condition. Background technique [0002] Blast furnace pulverized coal injection is the central link in the optimization of the ironmaking system structure, one of the three major technical routes for the development of my country's iron and steel industry, and also a major trend in the development of blast furnace ironmaking technology at home and abroad. Increasing the coal injection ratio can not only alleviate the shortage of main coking coal in my country, but also reduce the environmental pollution caused by the coking process. At the same time, it can als...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B3/02C21B5/00C10L10/00
Inventor 刘虎生
Owner 刘虎生
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