Blast-furnace anhydrous stemming and production device thereof

An anhydrous taphole mud and blast furnace technology, applied in the field of refractory materials, can solve the problems of poor slag erosion resistance, insufficient tapping time, and high smelting strength, so as to increase slag erosion resistance and improve slag iron erosion resistance , the effect of reducing environmental pollution

Inactive Publication Date: 2016-01-13
广东悦江节能技术有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

Large and medium-sized blast furnaces have high smelting intensity, large output, and long tapping time; when tapping, a large amount of slag will flow out with the molten iron from the anhydrous taphole hole of the taphole. The damage to the durability of anhydrous taphole clay is higher than the high temperature erosion of molten iron, so it often occurs that the tapping time and the amount of iron tapping are not enough due to the poor resistance to slag erosion of anhydrous taphole clay

Method used

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  • Blast-furnace anhydrous stemming and production device thereof

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Embodiment Construction

[0030] The invention provides an anhydrous blast furnace clay, which is characterized in that it is prepared from the following raw materials according to their weight percentages:

[0031] 4-8% of super homogenized bauxite particles with a particle size of 1-3mm;

[0032] 17-20% brown corundum particles with a particle size of ≤1mm;

[0033] 180 mesh white corundum powder 3-7%;

[0034] 320 mesh tabular corundum powder 4-8%;

[0035] 320 mesh chrome sand powder 2-6%;

[0036] 9-18% of carbon materials with a particle size of 1-3mm;

[0037] 200 mesh high-purity silicon carbide 4-10%;

[0038] 5-7% of silicon carbide particles with a particle size of ≤1mm;

[0039] 260 mesh superfine powder 10-13%;

[0040] 200 mesh soft clay 8-12%;

[0041] 200 mesh sericite 2-5%;

[0042] 180 mesh metal silicon powder 2-4%

[0043] Compound oil 10-12%.

[0044] Al in the above-mentioned super homogenized bauxite 2 o 3 85-88%, Fe 2 o 3 1.5-2%, SiO 2 5-7%, the balance is impurit...

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Abstract

The invention discloses a blast-furnace anhydrous stemming and a production device thereof. The blast-furnace anhydrous stemming is prepared from the following raw materials by weight: 4 to 8% of superfine homogenized bauxite particles, 17 to 20% of brown fused alumina particles, 3 to 7% of white fused alumina powder, 4 to 8% of tabular corundum powder, 2 to 6% of chromite sand powder, 9 to 18% of a carbon material, 4 to 10% of high-purity silicon carbide, 5 to 7% of silicon carbide particles, 10 to 13% of submicron powder, 8 to 12% of soft clay, 2 to 5% of sericite, 2 to 4% of metal silicon powder and 10 to 12% of composite oil. The invention has the following advantages: slag erosion resistance of the anhydrous stemming is increased; resistance of the anhydrous stemming to high-temperature molten iron erosion and wear is strengthened; opening performance and iron slag erosion resistance of the traditionally-used anhydrous stemming are improved; the quality stability of the anhydrous stemming is enhanced; meanwhile, a by-product electrical resistance material of carbon electrode smelting is utilized, so the anhydrous stemming is more beneficial for protection of resources and the environment.

Description

technical field [0001] The patent of the present invention relates to the field of refractory materials, in particular to an anhydrous blast furnace mortar. Background technique [0002] Blast furnace ironmaking is currently the most important ironmaking method in the world. As of 2013, my country's molten iron production reached nearly 800 million tons. Small blast furnaces have been gradually phased out due to their low output, heavy energy consumption and serious pollution. At present, the production of large and medium blast furnaces in the field of ironmaking accounts for more than 65% of domestic molten iron production. Large and medium-sized blast furnaces have high smelting intensity, large output, and long tapping time; when tapping, a large amount of slag will flow out with the molten iron from the anhydrous taphole hole of the taphole. The damage to the durability of anhydrous taphole mud is higher than that of molten iron for its high-temperature erosion, so it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66B28B3/22
Inventor 曹小梅
Owner 广东悦江节能技术有限公司
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