Ore proportioning and sintering method

A sintering method and a technology of ore blending, applied in the field of iron smelting, can solve problems such as unfavorable blast furnace conditions, metallurgical performance degradation, instability, etc., and achieve the effects of improving economic and environmental benefits, improving metallurgical performance, and increasing utilization efficiency

Inactive Publication Date: 2010-05-26
BEIJING ZHONGDIAN HUAFANG TECH +1
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Problems solved by technology

However, high-alumina sinter has the disadvantages of decreased metallurgical properties, increased slag viscosity, unf

Method used

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Embodiment Construction

[0010] The present invention will be described in further detail below in conjunction with specific embodiments.

[0011] In high-silicon and low-aluminum iron ore powder, the weight ratio of each main component is 45-55% by weight of TFe, SiO 2 10-20% by weight Al 2 o 3 Less than 1.0%, and the rest are impurities; in the high-aluminum low-silicon iron ore powder, the weight ratio of each main component is 60-70% by weight of TFe, SiO 2 Less than 5%, Al 2 o 3 The weight is 2.0-4.0%, and the rest are impurities.

[0012] For 1000m 3 The following blast furnace, the present invention provides preferred embodiment one, in this preferred embodiment, the TFe in the high-silicon low-alumina powder is 45%, SiO 2 20%, Al 2 o 3 1.0%, TFe in high aluminum low silicon mineral powder is 60%, SiO 2 5%, Al 2 o 3 The proportion of the two is 4.0%, and the proportion of the two is 50% of the total mixed iron ore material, and the rest is other iron ore materials, such as concentrat...

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Abstract

The invention relates to an ore proportioning and sintering method used for sintering a mixing iron ore material comprising high-silicon low-aluminum iron ore powder and high-aluminum low-silicon iron ore powder, wherein the high-silicon low-aluminum iron ore powder comprises the following components in percentage by weight: 45-55 percent of TFe, 10-20 percent of SiO2 and less than 1.0 percent of Al2O3; the high-aluminum low-silicon iron ore powder comprises the following components in percentage by weight: 60-70 percent of TFe, less than 5 percent of SiO2 and 2.0-4.0 percent of Al2O3, and Al2O3/SiO2 is 0.1-0.35; in the mixing iron ore material, the proportion of the high-silicon low-aluminum iron ore powder and the high-aluminum low-silicon iron ore powder is larger than 0 and not larger than 50 percent, and the grade of the iron of a sintering ore is 50-60 percent, the SiO2 occupies 5.0-9.0 percent, and the alkalinity is 1.2-2.5 percent. The method can reduce the cost of steel, increase the utilization efficiency of the two kinds of ore powder, improve the metallurgical property of the sintering ores and improve the breathability of a material layer in the process of sintering.

Description

technical field [0001] The invention relates to iron smelting technology, in particular to an ore blending and sintering method. Background technique [0002] With the development of economy and technology, the demand for steel products continues to grow, so the demand for iron ore is also increasing, which leads to the continuous rise in the price of iron ore, which greatly increases the production cost of various steel manufacturers, and iron ore is a kind of Non-renewable resources, especially rich iron ore resources are less, so the proportion of other iron ore types used in the actual production of sinter ore is gradually increasing, such as high-aluminum iron ore and high-silicon iron ore. However, high-alumina sinter has the disadvantages of decreased metallurgical properties, increased slag viscosity, unfavorable desulfurization of molten iron, and unstable blast furnace conditions; Improvement of column air permeability. Contents of the invention [0003] The pu...

Claims

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Application Information

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IPC IPC(8): C22B1/16
Inventor 杨岩张建良
Owner BEIJING ZHONGDIAN HUAFANG TECH
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