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Coal powder injection catalytic combustion burning-rate accelerator of blast furnace

A combustion aid and coal-catalyzed technology, applied in the field of additives, can solve problems such as high cost and complex additive components, and achieve the effects of reduced maintenance costs, obvious coal-saving effects, and convenient use

Inactive Publication Date: 2008-07-16
GUANGXI QINGRONG REFRACTORIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The above-mentioned published documents disclose the composition content and the effect of coal-fired additives from different angles. These additives contain carbonates or metal oxides, oxides of transition metals, rare earth metal oxides, minerals, etc., and some can Reduce the emission of harmful gases in the gas, and some can improve the combustion efficiency, but some additives are more complex and costly, and some metal oxides or transition metal oxides will also become impurities in steel during smelting and affect the quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Get 30 kilograms of pyrolusite (containing manganese 40-70%), 10 kilograms of fluorite powder, 10 kilograms of magnesium carbonate, 4 kilograms of mixed rare earths of lanthanum oxide and neodymium oxide, and 46 kilograms of limestone, and the above-mentioned raw materials are respectively pulverized into particles below 80 mesh, Mix evenly, according to the mass ratio of 0.2-5%, directly add to the coal and mix evenly, or mix it with the screw feeder from the raw coal conveyor belt, and inject it into the ironmaking blast furnace, which can reduce pollution emissions And improve the combustion efficiency.

Embodiment 2

[0057]Get 32 ​​kilograms of pyrolusite (containing manganese 40-70%), 12 kilograms of fluorite powder, 13 kilograms of magnesium carbonate, 6 kilograms of mixed rare earths of yttrium oxide and cerium oxide, and 37 kilograms of limestone. Mix evenly, according to the mass ratio of 0.2-5%, directly add to the coal and mix evenly, or mix it with the screw feeder from the raw coal conveyor belt, and inject it into the ironmaking blast furnace, which can reduce pollution emissions And improve the combustion efficiency.

Embodiment 3

[0059] Get 35 kilograms of pyrolusite (containing 40-70% manganese), 15 kilograms of fluorite powder, 15 kilograms of magnesium carbonate, 5 kilograms of mixed rare earths such as neodymium oxide, erbium oxide, samarium oxide and europium oxide, and 35 kilograms of limestone. The granules below 80 meshes should be mixed evenly, according to the mass ratio of 0.2-5%, directly added to the coal-fired coal and mixed evenly, or mixed with the screw feeder from the raw coal conveying belt, and injected into the ironmaking blast furnace, that is It can play a role in reducing pollution emissions and improving combustion efficiency.

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Abstract

The invention discloses an additive which can reduce pollution emission and improve combustion efficiency when in the combustion of bunker coal, which more particularly relates to a blast furnace coal injection catalyzing oxidant. The invention consists of soft manganese ore, fluorite powder, magnesium carbonate and rare earth metal oxide, the production method is that the raw materials are respectively smashed into the granules below 80 meshes, mixed evenly and directly added into the bunker coal for even mixing according to the weight proportion of 0.2 to 5 percent; or the raw materials are fed on a conveying raw coal belt by a spiral feeding machine, sprayed and blown into a blast furnace; the invention can also be taken as the bunker coal additive of a powder coal boiler or a boiling furnace.

Description

technical field [0001] The invention relates to an additive capable of reducing pollution discharge and improving combustion efficiency during coal combustion, in particular a catalytic combustion accelerant for blast furnace coal injection. Background technique [0002] my country's energy structure is dominated by coal combustion. Because coal combustion contains more S and a small amount of some polluting chemical elements such as Cd, Hg, Pb, Se, Cr, etc., the atmosphere is seriously polluted by soot. Sulfur dioxide and nitrogen oxides are the cause of acid rain. The main reason is that the acid rain pollution in our country is spreading, which has brought harm to the environment and ecology. Controlling the pollution of soot to the atmosphere has become an urgent and important issue for our country's environmental protection work. In addition, due to insufficient boiler design and operation reasons, such as the ratio of air to coal in the furnace, the ratio of primary and...

Claims

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Application Information

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IPC IPC(8): C10L9/10
Inventor 郭嘉秦殷李鹏
Owner GUANGXI QINGRONG REFRACTORIES
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