Bleed hole stemming and method for producing the same

A technology of taphole and blasting mud, which is applied to blast furnace components, blast furnaces, furnace types, etc., can solve the problems of high temperature resistance and corrosion resistance of blasting mud and other problems, so as to achieve not easy to expand rapidly, high temperature strength, and structure good effect

Active Publication Date: 2009-12-30
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main raw materials it uses are pyrophyllite, clay, silica, etc., and the material contains a lot of SiO 2 , the high temperature resistance and erosion resistance of the gun mud are adversely affected

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Dosing according to the following requirements. For the corundum raw material of 5-0 mm, the addition amount accounts for 40% of the total weight of ingredients. 3-0mm silicon carbide raw material, the added amount accounts for 10% by weight of the total ingredients. For coke powder with a thickness of 1-0 mm, the addition amount accounts for 10% of the weight percentage of the total ingredients. The added amount of silicon nitride raw material of 0.088-0mm accounts for 10% of the weight percentage of the total batching. The added amount of clay raw material of 0.088-0mm accounts for 14% of the weight percentage of the total batching. The added amount of sericite raw material of 0.088-0mm accounts for 3% of the weight percentage of the total batching. The added amount of the pyrophyllite raw material of 0.035-0mm accounts for 5% of the weight percentage of the total batching. The added amount of 5-0 μm activated alumina fine powder accounts for 1% by weight of the t...

Embodiment 2

[0061] Dosing according to the following requirements. For the corundum raw material of 5-0 mm, the addition amount accounts for 30% of the total weight of ingredients. 3-0mm silicon carbide raw material, the added amount accounts for 15% by weight of the total ingredients. For coke powder with a thickness of 1-0mm, the addition amount accounts for 15% of the weight percentage of the total ingredients. The silicon nitride raw material of 0.088-0mm is added in an amount of 7% of the total weight percentage of the ingredients. The added amount of 0.088-0mm clay raw material accounts for 10% of the weight percentage of the total batching. The added amount of sericite raw material of 0.088-0mm accounts for 7% of the weight percentage of the total batching. The added amount of the pyrophyllite raw material of 0.035-0mm accounts for 8% of the weight percentage of the total batching. The added amount of 5-0 μm active alumina micropowder accounts for 3% of the weight percentage of...

Embodiment 3

[0065] Dosing according to the following requirements. For the corundum raw material of 5-0 mm, the addition amount accounts for 20% of the total weight of ingredients. 3-0mm silicon carbide raw material, the added amount accounts for 20% by weight of the total ingredients. For coke powder with a thickness of 1-0 mm, the addition amount accounts for 23% of the total weight percentage of the ingredients. The silicon nitride raw material of 0.088-0mm is added in an amount of 3% of the total weight percentage of the ingredients. The added amount of 0.088-0mm clay raw material accounts for 5% of the weight percentage of the total batching. The added amount of sericite raw material of 0.088-0mm accounts for 10% of the weight percentage of the total batching. The added amount of the pyrophyllite raw material of 0.035-0mm accounts for 10% of the weight percentage of the total batching. The added amount of 5-0 μm active alumina micropowder accounts for 5% of the weight percentage ...

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Abstract

The invention relates to a stemming at a taphole; the weight percentages of the components are the following: 20 to 40 of corundum, 10 to 20 of silicon carbide, 3 to 10 of silicon nitride, 10 to 23 of coke powders, 1 to 5 of graphite powders, 3 to 10 of sericite, 1 to 5 of active alumina micropowders, 5 to 15 of clay, 5 to 10 of pyrophyllite, 1 to 3 of metal powders, and +15 to 25 of water-free binder. The stemming adds a plurality of materials with plasticity and good cohesiveness to cause the stemming to easily block the hole and fill interspaces, with good binding performance of new stemming and old stemming; materials with medium and high temperature expansion are added to reduce the size of the stemming contraction at high temperature, and cracks can be avoided; materials with sintering function within different temperature areas are added, so the stemming has good sintering strength in different temperature scopes; materials with high-temperature resistance and good erosion resistance are added, and thus the stemming has high strength at high temperature, washing resistance and erosion resistance.

Description

technical field [0001] The invention relates to a tap hole clay and a preparation method thereof, in particular to the tap hole mud used for blocking the tap hole in the ironmaking process of a smelting reduction gasifier, and belongs to the technical field of ironmaking. Background technique [0002] The taphole clays in the prior art are all developed and applied for blast furnaces, and the larger the volume of the blast furnace, the higher the smelting intensity, and the higher the requirements for the blast furnace clay. The blast clay of the technology of the present invention is developed for the application of the smelting reduction gasifier. The smelting reduction gasifier is the most important production equipment in the non-blast furnace ironmaking process. [0003] The structure of the hearth bottom of the smelting reduction gasifier is similar to that of the blast furnace, but due to the difference in the gas pressure in the hearth, the required strength of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/00C04B35/10C04B35/565C04B35/52C21B7/04
Inventor 甘菲芳夏欣鹏吴志荣陈旭东
Owner BAOSHAN IRON & STEEL CO LTD
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