High-chromium and high-titanium vanadium-titanium magnetite blast furnace iron-smelting furnace burden and blast furnace smelting method thereof

Abstract

The invention provides a vanadium-titanium magnetite blast furnace iron-smelting furnace burden and a smelting method thereof. The furnace burden comprises the following components in parts by weight: 65-75 parts of high-chromium and high-titanium vanadium-titanium sinters, 25-30 parts of high-chromium vanadium-titanium pellets and 2-5 parts of common lump ores with particles of 10-50mm, wherein the high-chromium vanadium-titanium sinters are prepared through sintering high-chromium and high-titanium vanadium-titanium magnetite concentrates, common iron ores, a fuel and a flux with a mass ratio of (40 to 50): (20 to 40): (4 to 5): (10 to 15); the mass content of Cr2O3 in the high-chromium and high-titanium vanadium-titanium magnetite concentrates is 1.0-1.9%, and the mass content of TiO2 is 12-13%; the high-chromium vanadium-titanium pellets are prepared from high-chromium and high-titanium vanadium-ferrum magnetite concentrates and bentonite with a mass ratio of (97 to 99): (1 to 3); and the mass content of TFe in the common lump ores is 40-50%, and the mass content of SiO2 is 15-25%. The furnace burden is capable of realizing blast furnace intensified smelting, and high in blast furnace utilization coefficient.

Description

technical field [0001] The invention relates to the technical field of ironmaking, in particular to a high-chromium and high-titanium vanadium-titanium magnetite blast furnace ironmaking charge and a blast furnace smelting method thereof. Background technique [0002] my country is a large developing country. With the rapid development of the socialist market economy, the quality and requirements for iron ore are becoming more and more stringent. For actual production, cost saving has always been one of the important goals of the enterprise, and because the price of ordinary ore is much higher than that of vanadium-titanium magnetite, therefore, more utilization of vanadium-titanium magnetite in actual production has an important effect on saving costs. Significance. In addition to iron, vanadium and titanium, high chromium and high titanium vanadium-titanium magnetite is also accompanied by precious chromium resources, conjugated to the two major industries of iron and ste...

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Problems solved by technology

[0003] The production process for the comprehensive utilization of ordinary vanadium-titanium iron ore has been basically formed, but according to this process, the utilization efficiency of iron, vanadium and titanium is low, especially the utilization rate of titanium resources is low, and the utilization rate of Panxi titanium resources is 25%. , the utilization rate of titanium resources in Chengde area is less than 10%.

Although my country's high-chromium and high-titanium vanadium-titanium magnetite resources have begun to be mined and utilized on a small scale, because the system integration technology has not yet been formed, the vanadium-chromium resources, especially the chromium resources, have not been utilized, which not only directly leads to high-chromium The comprehensive utilization value of high-titanium vanadium-titanium magnetite cannot be effectively utilized, which wastes resources and pollutes the environment

[0005] In view of the particularity of high-chromium and high-titanium vanadium-titanium magnetite resources, there is no technology to apply it to blast furnace production at home and abroad, and the relevant research is very insufficient.

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