Sintered ore capable of improving viscosity of blast furnace slag and process for preparing same

A blast furnace slag and sinter technology, which is applied in the field of sinter, can solve the problems of poor fluidity of blast furnace slag and achieve the effect of not deteriorating coal consumption index, improving grade and ensuring production

Inactive Publication Date: 2007-05-16
武钢集团有限公司 +1
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Problems solved by technology

[0006] The purpose of the invention is to solve the problem of high Al in existing iron ore 2 o 3 In order to solve the problem of poor flowability of blast furnace slag caused by ...

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  • Sintered ore capable of improving viscosity of blast furnace slag and process for preparing same

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Embodiment Construction

[0026] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0027] As shown in the figure, the sinter preparation process of the present invention is roughly divided into: raw material preparation → primary mixing → secondary mixing → distribution → ignition → sintering → cooling → screening and other stages. The specific operation steps are as follows:

[0028]1) Raw material equipment: According to the specific requirements of the blast furnace for the basicity CaO / SiO2 and MgO content of the sintered ore, the finished sintered ore meets the basicity CaO / SiO2=1.5-3.0, the content of TFe is 50-60%, and the content of MgO is The index of 1.5-4.0%, in the weight ratio is 70-85% of iron-containing raw materials, 2-5% of quicklime, 0-8% of dolomite, 5-12% of limestone, 0.2-5% of light-burned magnesium oxide powder, coal In the range of 3% to 8% of coke powder or coke powder, the conventional calculation me...

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Abstract

The invention discloses a sintered ore and preparing method of improved blast furnace slag viscosity to solve bad fluidity of blast furnace slag with high Al2O3 in the present ferric ore, which comprises the following parts: 70-85% ferric material, 2-5% limestone, 0.2-5% light-burned magnesia powder and 3-8% coal dust or coke dust, wherein the alkalinity of CaO and SiO2 of sintering ore is 1.5-3.0 with TFe at 50-60% and MgO at 1.5-4.0%. The preparing method comprises the following steps: allocating raw materials; blending once and twice; distributing materials; igniting; sintering; cooling; sieving.

Description

technical field [0001] The invention relates to sintered ore used as one of blast furnace ironmaking raw materials in the metallurgical industry, in particular to a sintered ore capable of improving the viscosity of blast furnace slag and a preparation method thereof. Background technique [0002] In the field of blast furnace ironmaking, the viscosity of blast furnace slag is an important indicator of blast furnace smelting, which is mainly reflected in the fluidity of blast furnace slag. The fluidity of blast furnace slag can not only affect the quality of pig iron, but also affect blast furnace productivity and slag discharge operation efficiency. The fluidity of blast furnace slag is mainly determined by the Al content in the slag. 2 o 3 and the amount of MgO is determined. When Al 2 o 3 When the content is too high, the viscosity of the slag increases, the slag becomes thicker, and the fluidity becomes poor; when the content of MgO is too high, the viscosity of the...

Claims

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Application Information

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IPC IPC(8): C22B1/14C22B1/16C22B1/26
Inventor 翁得明李荐胡立新胡平李怀远冯红云蒋文笛
Owner 武钢集团有限公司
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