Additive for carbon composite briquette and preparation and using methods thereof

Abstract

The invention provides an additive for a carbon composite briquette. The additive comprises the following raw materials in percentage by weight: 40%-55% of quicklime, 18%-32% of barium oxide, 10%-30% of manganese dioxide and 9%-10% of ferrocene. The raw materials are placed into a mixing machine in proportion, stirring for 10-20min, and the powder-like additive is obtained after uniform mixing. When the additive is used, the additive accounts for 1%-2% of the mass of the carbon composite briquette. The additive provided by the invention can play the roles as a catalyst and a flux during the reduction process of the carbon composite briquette, reduce the coal blending quantity by 8-9%, improve the reduction rate by 5.5% and shorten the reduction time by 10%. The additive can further significantly reduce the emission quantity of harmful gas during the reduction process of the carbon composite briquette and reduce the environmental pollution. The raw materials do not contain K, Na and other substances which are harmful to the iron-smelting process, so that the circulating enrichment of the harmful substances during the smelting process can be avoided. The additive has the advantages of cheap price and small using quantity; and furthermore, preparation and using methods thereof are simple and suitable for industrial production.

Description

Technical field [0001] The invention belongs to the technical field of iron smelting pellets, and particularly relates to an additive used for hot-pressing carbon-containing pellets and a preparation and use method thereof. Background technique [0002] At present, the problems faced by steel production are long process flow and serious environmental pollution. In addition, the conditions of raw materials and fuels have gradually deteriorated, and the amount of high-quality mineral resources has decreased, while the high crystal water and high A1 2 O 3 The use of high-content ore increases, which makes sintering and pellet production face great difficulties, and at the same time increases the burden on the blast furnace, resulting in a decline in its smelting index. In addition, high-quality coking coal resources are increasingly scarce worldwide and extremely expensive. Therefore, in order to continue the healthy development of the steel industry, all countries are committed to...

AI Technical Summary

Problems solved by technology

However, the production process of sinter and pellets is under an oxidizing atmosphere and undergoes a roasting stage, while the production process of hot-pressed carbon-containing pellets is under a reducing atmosphere, so sinter and pellet additives cannot be directly applied to hot-pressed carbon-containing pellets During group production

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