A kind of production method of sintered ore containing high crystal water lump ore

Abstract

The invention provides a production method of sintering ores containing lump ores with high crystal water. The production method is characterized by adding natural lump ores with high crystal water to sinter mixtures according to a certain proportion during sintering secondary mixtures, distributing the mixtures into a sintering machine after mixing the materials uniformly and carrying out sintering production, wherein when the basicity of the sintering ores is comprehensively computed according to the lump ores and the sinter mixtures and the lump ores are uniformly distributed in the mixtures, the ratio of the lump ores in the sinter mixtures is computed according to that the basicity of the local sintering ores is not more than 2.45; when the comprehensive basicity of the sintering ores is 2.0, the lump ore proportion computed according to the comprehensive basicity is not more than 20%. The production method has the beneficial effects that the natural lump ores with high crystal water can completely eliminate the burst phenomenon in the sintering process, thus greatly improving the high temperature metallurgical performances of the lump ores, increasing the furnace proportion of the natural lump ores, reducing the raw material costs and energy consumption and reducing environmental pollution; under the condition that the furnace basicity is the same, the basicity of the sintering ores can be relatively improved, the quality of the sintering ores can be improved, the sintering productivity can be increased and the condition is beneficial to smoothness of blast furnace production.

Description

technical field [0001] The invention belongs to the field of production technology of ironmaking raw materials, and in particular relates to a production method for sintered ore containing high crystallization nugget ore. Background technique [0002] Lump ore is one of the important iron-containing raw materials used in blast furnaces. Together with high-basic sinter and acidic oxidized pellets, it forms the iron-containing charge structure of the blast furnace. The use of lump ore lays an important foundation for the realization of a reasonable charge structure for the blast furnace. . [0003] In recent years, with the changes in iron ore resources at home and abroad and the structure of blast furnace iron-containing charge, it has become a trend for the development and change of blast furnace charge structure to rationally utilize the two kinds of iron ore resources at home and abroad and increase the proportion of lump ore into the furnace. Although lump ore is a raw o...

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Problems solved by technology

High crystalline water lump ore is directly fed into the furnace. Due to its high crystal water content, thermal cracking is serious in the upper part of the blast furnace. The powder produced by thermal cracking will lead to poor furnace conditions such as blockage of gas flow channels and thick furnace walls.

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