Stemming and purpose thereof

A technology of taphole clay and silicon carbide is applied in the field of taphole taphole clay of iron-making furnaces, which can solve the problems of difficult generation of spinel, difficult to manifest effects, and short sintering time, and achieve long tapping time and corrosion resistance. The effect of good scour performance and good comprehensive performance

Active Publication Date: 2012-10-31
XINJIANG BAYI IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this reaction needs enough time and high temperature. Generally, the temperature in the iron mouth hole is not high in the application of gun mud.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Dosing according to the following requirements: corundum raw material with a particle size of 4-0mm, the addition accounted for 30wt% of the total batching weight; silicon carbide raw material with a particle size of 2-0mm, the addition accounted for 20wt% of the total batching weight percentage; 0mm magnesium aluminum spinel, the addition amount accounts for 9wt% of the total weight percentage of the ingredients; the carbon material with a particle size of 0.5-0mm, the addition amount accounts for 15wt% of the total weight percentage of the ingredients; the sialon powder with a particle size of 0.088-0mm, The addition amount accounts for 10wt% of the total ingredient weight percentage; the kaolin raw material with a particle size of 0.088-0mm, the addition amount accounts for 14wt% of the total ingredient weight percentage; the silicon aluminum alloy powder with a particle size of 0.088-0mm, the addition amount accounts for 2wt%.

[0052] The above-mentioned various ra...

Embodiment 2

[0055] Dosing according to the following requirements: corundum raw material with a particle size of 4-0mm, the addition accounted for 32wt% of the total batching weight; silicon carbide raw material with a particle size of 2-0mm, the addition accounted for 11wt% of the total batching weight percentage; 0mm magnesia-aluminum spinel, the addition accounted for 4wt% of the total weight percentage of the ingredients; the addition of carbon materials with a particle size of 0.5-0mm accounted for 24wt% of the total weight percentage of the ingredients; the sialon powder with a particle size of 0.088-0mm, added The amount accounts for 14wt% of the total weight percentage of the ingredients; the kaolin raw material with a particle size of 0.088-0mm accounts for 8wt% of the total weight percentage of the ingredients; the silicon-aluminum alloy powder with a particle size of 0.088-0mm accounts for 7wt of the total weight percentage of the ingredients %.

[0056] The above-mentioned var...

Embodiment 3

[0059] Dosing according to the following requirements: corundum raw material with a particle size of 4-0mm, the addition accounted for 48wt% of the total batching weight; the silicon carbide raw material with a particle size of 2-0mm, the addition accounted for 7wt% of the total batching weight percentage; 0mm magnesium aluminum spinel, the addition amount accounts for 3wt% of the total weight percentage of the ingredients; the carbon material with a particle size of 0.5-0mm, the addition amount accounts for 17wt% of the total weight percentage of the ingredients; the sialon powder with a particle size of 0.088-0mm, The addition amount accounts for 12wt% of the total ingredient weight percentage; the kaolin raw material with a particle size of 0.088-0mm, the addition amount accounts for 10wt% of the total ingredient weight percent; 3 wt%.

[0060] The above-mentioned various raw materials are weighed and prepared according to the stated ratio, mixed evenly, and a composite bin...

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Abstract

The invention relates to a stemming, and especially relates to a stemming used in a non-blast-furnace taphole, wherein the non-blast-furnace taphole is used in molten iron smelting with a smelting reduction method. The stemming comprises: corundum 30-48 wt%, silicon carbide 7-20 wt%, a carbonaceous material 15-24wt%, sialon 10-20wt%, magnesium aluminate spinel 3-9wt%, kaolin 8-14 wt%, silicon-aluminum alloy 2-7wt%, and a tar and resin composite binding agent accounting for 16-24% of the total weight of the above materials. The stemming has good opening performance and mud-making performance. The stemming can resist erosion and corrosion of high-temperature high-pressure molten iron and slag. Especially, the stemming can resist corrosions of high-sulfur high-silicon molten iron and FeO-rich slag. When in use, a taphole depth is stable. The stemming is applied on a taphole of a smelting reduction furnace used in iron making.

Description

technical field [0001] The invention relates to a taphole clay of an ironmaking furnace, in particular to a taphole clay for non-blast furnace tapholes for molten iron smelting by a smelting reduction method. Background technique [0002] The metallurgical furnaces for molten iron smelting in the iron and steel industry are basically blast furnaces, so the blast furnace clay is also developed for the working conditions of the blast furnace. With the advancement of ironmaking technology and increasingly stringent environmental protection requirements, non-blast furnace ironmaking technology has gradually emerged, so various methods of smelting reduction methods for producing molten iron have emerged. The production operation process and taphole conditions of this kind of smelting reduction furnace are very different from those of the blast furnace, so the taphole mud used for the taphole is very different from the blast furnace mud. The gas pressure in the hearth of the smel...

Claims

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Application Information

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IPC IPC(8): C04B35/66C21B11/00
Inventor 甘菲芳夏欣鹏
Owner XINJIANG BAYI IRON & STEEL
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