Thermal-shock resistant fireproof brick and production process thereof

A technology for refractory bricks and thermal shock resistance, which is applied in the field of thermal shock-resistant refractory bricks and its production, and can solve the problems of short service life and poor seismic performance of refractory bricks

Inactive Publication Date: 2006-06-28
ZHENGZHOU YUXING REFRACTORY MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above situation, the object of the present invention is to provide a thermal shock resistant refractory brick and its production method, which can effectively solve the problems of poor shock resistance and short service life of the refractory brick. The technical solution is that the refractory brick of the present invention consists of Mullite, corundum, α-Al 2 o 3 Micropowder, andalusite and clay powder constitute the base material, and then add 3-15% of the binder of the base material weight to make it. The production method is to add the binde

Method used

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Effect test

Embodiment 1

[0009] The heat-shock resistant refractory brick of the present invention is made of base material and bonding agent, and said base material is by weight: mullite 30%, corundum 35%, α-Al 2 o 3 10% of fine powder, 15% of andalusite and 10% of clay powder. The binder is composed of 30% of 180 mesh andalusite powder, 20% of 180 mesh clay powder and 50% of water. The binder is in the base material The added weight is 10% of the base material weight (ie base material: binder = 100:10 or written as 10:1).

[0010] Such as 1000kg of base material, including 300kg of mullite, 350kg of corundum, α-Al 2 o 3 It is composed of 100kg of fine powder, 150kg of andalusite and 100kg of clay powder. The binder is composed of 30kg of andalusite powder, 20kg of clay powder and 50kg of water. That is, the refractory brick is made of 1000kg of base material and 100kg of binder.

[0011] The production method that realizes embodiment 1 is, at first select base material, by weight: mullite 30% (or...

Embodiment 2

[0013] The heat shock resistant refractory brick of the present invention can also be calculated by weight: mullite 40%, corundum 30%, α-Al 2 o 3 The base material composed of micropowder 8%, andalusite 12% and clay powder 10% is made of a binder composed of 30% andalusite powder, 30% clay powder and 40% water by weight, and the amount of binder added is based on 12% of the weight of the material, such as 10000kg base material is made of mullite 4000kg, corundum 3000kg, α-Al 2 o 3 Micro powder 800kg, andalusite powder 1200kg and clay powder 1000kg, binder is composed of andalusite powder 360kg, clay powder 360kg and water 480kg.

Embodiment 3

[0015] The refractory brick of the present invention can also be made by the following proportions, by weight: 55% mullite, 17% corundum, α-Al 2 o 3 5%, andalusite 15%, clay powder 8% and mud 10% of the total weight of the above materials.

[0016] The process steps to realize embodiment 2 and 3 are the same as embodiment 1, wherein the refractory brick molding process (method) can also adopt the refractory brick molding method of patent application number 200510107273.7, and will not be repeated.

[0017] It can be seen from the above that the composition of the refractory brick of the present invention is completely different from that of the existing anti-shock refractory bricks, and the binder is not made of existing lignin or simple water, and is fired at a high temperature above 1450°C. It is scientific and reasonable. After testing, the load softening start temperature of the heat shock resistant refractory brick made by the present invention is above 1500°C. The ther...

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Abstract

The invention relates to a heat shock resistance firebrick and the manufacture method. The method is that it adopts mullite, corundum, alpha-Al2O3 powder, andalusite and clay as base material, adding 3-15wt% binding agent. The process includes the following steps: adding binding agent into the base material, grinding to equal, molding, sintering at 1450 degree centigrade. The invention has good heat shock resistance, long useful life, etc. It has great economic and social benefits.

Description

1. Technical field [0001] The invention relates to a heat-shock-resistant refractory brick used in a blast stove for smelting iron and steel and a production method thereof. 2. Background technology [0002] With the large-scale blast furnace and the development of hot blast stove longevity technology, the quality of hot blast furnace lining materials is becoming more and more important. Due to the harsh working conditions of hot blast stove burner bricks, pipe bricks, hot blast outlets and other parts, frequent alternation of cold and heat (thermal shock phenomenon) ), it is more destructive to the refractory materials in these parts, and the life of the hot blast furnace is closely related to it. The number of anti-water cooling tests of high alumina bricks is generally 20, 30, 40, 50, 70 times, and rarely reaches more than 80 times. However, due to poor thermal shock stability and other reasons, these refractory bricks are easy to use in use. The phenomenon of brick fall...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/622C04B35/64
Inventor 刘世聚周福辰张德松黄丙乾范建超刘浩磊李少鹏臧中敏
Owner ZHENGZHOU YUXING REFRACTORY MATERIAL
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