Catalytic combustion improver for blast furnace coal injection and application method thereof

Abstract

The invention discloses a catalytic combustion improver for blast furnace coal injection and an application method thereof. The catalytic combustion improver is prepared from the following raw materials in percentage by mass through milling and mixing: 1-5% of ferrocene or potassium permanganate, rare metal catalysts including 1-2% of lanthanum oxide and cerium oxide, 30-35% of calcium peroxide, 15-20% of magnesium peroxide, 15-20% of active manganese dioxide and 1-3% of copper sulfate, and a carrier including 15-20% of calcium carbonate or dolomite, wherein the particle size of the product is 0.076 mm, and the content is greater than or equal to 95%. The catalytic combustion improver for blast furnace coal injection, disclosed by the invention, is used in a pulverized coal mass rate of 0.4-0.45%, the particle size of pulverized coal is required to be 0.076 mm, and the content of pulverized coal is required to be greater than or equal to 50%. According to the invention, through prompting the early release of coal chemical energy, the combustion efficiency of pulverized coal is increased, and the purposes of saving energy and reducing consumption are achieved. After a catalytic combustion improver product disclosed by the invention is added into pulverized coal, through a chemical reaction, C-C bonds in the pulverized coal are forcedly fractured, therefore, the ignition temperature of the pulverized coal is reduced, and the pulverized coal is completely combusted in a short time.

Description

technical field [0001] The invention relates to the fields of metallurgy and coal chemical industry, in particular to a solid combustion accelerant for promoting the complete combustion of pulverized coal and improving the combustion efficiency of pulverized coal and its use method, which is mainly used for improving the combustion rate of pulverized coal injection in ironmaking blast furnaces and reducing the use of coke Amount, reducing the sulfur content in molten iron, is conducive to the smooth operation of furnace conditions. Background technique [0002] At present, with the shortage of resources and energy, in the metallurgical industry, the stock of coking coal has dropped sharply, the supply of high-quality coking coal is in short supply, and the price of coke has risen. Reduce the amount of coal, reduce the amount of coke used to achieve the purpose of saving coke, reduce the cost of smelting, and achieve the purpose of energy saving at the same time. [0003] En...

AI Technical Summary

Problems solved by technology

A small amount of unburned pulverized coal is effectively used in the furnace, and a large amount of unused pulverized coal affects the smooth operation of the blast furnace to a certain extent