Refractory material and tuyere composite brick

A refractory material and composite brick technology, which is applied in the field of tuyere composite bricks, can solve the problems of poor erosion resistance, slag resistance and alkali resistance, and low cost performance.

Active Publication Date: 2016-08-17
HUNAN XIANGGANG RUITAI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing bricks with tuyere combination are not cost-effective, and are not strong in erosion resistance, slag resistance and alkali resistance.

Method used

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  • Refractory material and tuyere composite brick
  • Refractory material and tuyere composite brick

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preparation example Construction

[0030] The raw materials for the preparation of refractory materials provided by the present invention include 66-76 parts by weight of granular materials with a particle size of 0.088-8 mm; Corundum, andalusite, sillimanite and quartz sand;

[0031] In the present invention, the granular materials include granular materials with a particle diameter of 5-8mm and granular materials with a particle diameter of 3-5mm; the mass proportion of the granular materials with a particle diameter of 5-8mm in all granular materials Preferably it is 32%-42%; the mass proportion of the granules with a particle diameter of 3-5mm in all the granules is preferably 18%-28%. In the present invention, the granular materials include granular materials with a particle diameter of 1-3mm and granular materials with a particle diameter of 0.088-1mm; the mass proportion of the granular materials with a particle diameter of 1-3mm in all granular materials It is preferably 9%-19%; the mass proportion of ...

Embodiment 1

[0083] Carry out the overall design of the combined brick according to the design size of a blast furnace tuyere, that is, carry out the overall shape according to the Chinese patent No. 87102012, and obtain the gypsum master mold of each individual brick of the combined brick;

[0084] Silica fine powder with a particle size greater than 0 and less than or equal to 5 μm, mullite raw meal powder with a particle size greater than 0 and less than or equal to 0.074 mm, and particle size greater than 0 and less than or equal to 0.15 mm with a mass ratio of 4:4:0.2:6 Sodium phosphate superplasticizer and clean water are pre-mixed in a ball mill to obtain mud, and the mud is vacuum stirred;

[0085] Add brown corundum, andalusite, sillimanite and quartz sand with a mass ratio of 60:5:4:2 to the 800 forced sand mixer, and the particles with a particle size of 5 to 8mm in the particle materials are among all the particles. The mass proportion in the granular material is preferably 36....

Embodiment 2

[0092] Carry out the overall design of the combined brick according to the design size of a blast furnace tuyere, that is, carry out the overall shape according to the Chinese patent No. 87102012, and obtain the gypsum master mold of each individual brick of the combined brick;

[0093] Silica powder with a particle size greater than 0 and less than or equal to 5 μm, mullite raw meal powder with a particle size greater than 0 and less than or equal to 0.074 mm, and sodium tripolyphosphate with a particle size greater than 0 and less than or equal to 0.15 mm with a mass ratio of 4:3:0.15:5.5 The water reducer and clean water are pre-mixed in a ball mill to obtain mud, and the mud is vacuum stirred;

[0094] Add brown corundum, andalusite, sillimanite and quartz sand with a mass ratio of 58:6:5:3 to the 800 forced sand mixer, and the particles with a particle size of 5 to 8 mm in the particle materials are among all the particles. The mass proportion in the granular material is ...

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Abstract

The invention provides a refractory material and a tuyere composite brick. The refractory material is prepared from the following raw materials in parts by weight: 66 to 76 parts of a particle material with a particle size of 0.088 to 8 mm, and 24 to 34 parts of fine powder with a particle size larger than 0 and less than 0.088 mm, wherein the particle material comprises brown fused alumina, andalusite, sillimanite and quartz sand with a mass ratio of (50-70): (3-7): (2-6): (1-3); and the fine powder comprises corundum powder, silicon carbide powder, calcined alpha alumina micropowder, silicon dioxide micropowder and mullite raw meal with a mass ratio of (7-11): (5-9): (3-7): (2-6): (2-6). The refractory material uses corundum and silicon carbide as main raw materials, and adopts the andalusite, the sillimanite, the quartz sand, the calcined alpha alumina micropowder, the silicon dioxide micropowder and the mullite raw meal to improve the crystal phase structure of the refractory material, so the apparent porosity of the refractory material is reduced; and scour resistance, slag resistance, alkali resistance, oxidation resistance, wear resistance and thermal shock resistance of the refractory material are improved.

Description

technical field [0001] The invention relates to the technical field of tuyere combined bricks, in particular to a refractory material and tuyere combined bricks. Background technique [0002] The blast furnace is the main thermal equipment for ironmaking production, and its tuyere is the highest temperature area in the blast furnace. The high-temperature gas generated in front of the tuyere rises at a very high speed, and its temperature is above 1600°C; the high-temperature molten iron and slag at around 1450°C to 1550°C flow to the furnace hearth through the bosh, and the high-temperature coke keeps moving downward, and in the There is a high-speed whirling movement of coke at the tuyeres, and various high-temperature metallurgical reactions are carried out violently in this area. Therefore, the refractory materials at the tuyeres of the blast furnace are in very harsh working conditions. Requirements for the refractory material at the tuyere of the blast furnace are: hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/101C04B35/622
CPCC04B35/101C04B35/622C04B2235/3217C04B2235/3418C04B2235/3463C04B2235/3826
Inventor 朱新军唐安山曾立明刘利华曾昆
Owner HUNAN XIANGGANG RUITAI TECH
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