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Air brick prepared based on isostatic cool pressing wet bag method, and preparation method of air brick

A technology of cold isostatic pressing and breathable bricks, applied in the field of breathable brick preparation, can solve the problems of quality fluctuation and particle segregation of breathable bricks, and achieve the effect of uniform and stable air permeability, sufficient air permeability and high thermal shock stability

Active Publication Date: 2020-10-13
日照利尔高温新材料有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a breathable brick based on the cold isostatic wet bag method and its preparation method, through the design of the breathable brick to solve the problem that the current breathable brick in the prior art adopts pouring or machine press molding, and the breathable When the brick is formed, there are certain differences in the forming pressure received by the upper and lower parts of the inside and outside, and in terms of the particle size distribution of the mud, there is a particle segregation phenomenon, relatively large particles move downward, and small particles or fine particles The powder moves upwards, which leads to the technical problem of fluctuation in the quality of each part of the breathable brick

Method used

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  • Air brick prepared based on isostatic cool pressing wet bag method, and preparation method of air brick
  • Air brick prepared based on isostatic cool pressing wet bag method, and preparation method of air brick

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preparation example Construction

[0057] like figure 2 As shown, the present invention also provides a method for preparing the breathable brick based on the cold isostatic pressing wet bag method as described in any one of the above, comprising the following steps:

[0058] S1) After the brick inner core mixture, the breathable layer mixture and the brick outer layer mixture are mixed, dried and trapped respectively, the ready-to-use brick inner core mixture, the ready-to-use air-permeable layer mixture and the brick outer layer mixture are obtained. material;

[0059] S2) Put the brick inner core mixture into a primary forming mold, perform isostatic pressing in a wet bag isostatic pressing machine, and obtain the brick inner core 2;

[0060] S3) Wrap the wax sheet on the outer surface of the brick inner core 2, and a plurality of through holes through the wax sheet are arranged at intervals on the wax sheet, put the brick inner core 2 wrapped with the wax sheet into the secondary molding mold, and then pl...

Embodiment 1

[0076] Based on the above basis, sample 1 was prepared, and the preparation steps were as follows:

[0077] 101) After the brick inner core mixture, air-permeable layer mixture and brick outer layer mixture are mixed, dried and trapped respectively, the ready-to-use brick inner core mixture, the ready-to-use air-permeable layer mixture and the brick outer layer mixture are obtained. material;

[0078] Among them, the temperature when the material is trapped is 23°C-25°C; the time for trapping the material is 48h;

[0079] Among them, the volatile content of the air-permeable layer mixture to be used is 2.55%-2.65% at 160°C;

[0080] Among them, in terms of parts by weight, the air-permeable layer mixture includes 97 parts of fused magnesia, 13 parts of zircon mullite, 9 parts of fused quartz, 3 parts of calcined alumina micropowder, 1.5 parts of ferrosilicon nitride, and 5.5 parts of antioxidant , 5 parts of loss-of-ignition agent, 10 parts of thermosetting liquid resin, 1.5...

Embodiment 2

[0101] Based on the above basis, sample 2 was prepared, and the preparation steps were as follows:

[0102] 201) After the brick inner core mixture, air-permeable layer mixture and brick outer layer mixture are mixed, dried and trapped respectively, the ready-to-use brick inner core mixture, the ready-to-use air-permeable layer mixture and the brick outer layer mixture are obtained. material;

[0103] Among them, the temperature when the material is trapped is 23°C-25°C; the time for trapping the material is 48h;

[0104] Among them, the volatile content of the air-permeable layer mixture to be used is between 2.55% and 2.65% at 160°C;

[0105] Among them, in terms of parts by weight, the air-permeable layer mixture includes 97 parts of fused magnesia, 13 parts of zircon mullite, 8 parts of fused quartz, 3 parts of calcined alumina micropowder, 1.5 parts of ferrosilicon nitride, and 5.5 parts of antioxidant , 5 parts of loss-of-burn agent, 9 parts of thermosetting liquid res...

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Abstract

The invention relates to an air brick prepared based on an isostatic cool pressing wet bag method, and a preparation method of the air brick. The air brick comprises a brick outer layer; an embedded groove is formed in the upper end of the brick outer layer, and a brick inner core is arranged in the embedded groove in an embedded mode; a lower gas flow pass is formed between the peripheral wall ofthe brick inner core and the inner wall of the embedded groove, and a plurality of lower connecting columns connected with the brick outer layer are laid on the peripheral wall of the brick inner core at intervals; the upper end of the brick inner core upwards extends outside the embedded groove, the brick inner core arranged outside the embedded groove is wrapped with a ventilation layer, an upper gas flow pass communicates with the lower gas flow pass is formed between the peripheral wall of the brick inner core and the ventilation layer, and the peripheral wall of the brick inner core is provided with upper connecting columns connected with the ventilation layer; a gas guiding hole is formed in the bottom of the brick outer layer, the gas guiding hole upwards penetrates through the brick outer layer and communicates with the lower gas flow pass, the gas guiding hole is further externally connected with a gas guiding pipe, one end of the gas guiding pipe communicates with a gas joint, and steel jackets sleeve both the brick outer layer and the gas guiding pipe; and a fire clay layer is arranged between the brick outer layer and the steel jacket sleeving the brick outer layer.

Description

technical field [0001] The invention relates to the technical field of preparation of air-permeable bricks, in particular to an air-permeable brick prepared based on a cold isostatic wet bag method and a preparation method thereof. Background technique [0002] The breathable brick is located at the bottom of the ladle, and its main function is to accelerate the stirring of molten steel by blowing argon gas into the breathable brick in the refining section, promote the floating of non-metallic inclusions in the molten steel under the disturbance of argon bubbles, and realize the temperature and composition of the molten steel inside the ladle. Tend to a uniform effect. [0003] At present, the air permeable bricks are formed by pouring or machine pressing. When the permeable bricks are formed, there are certain differences in the forming pressure received by the upper and lower parts of the inside and outside, and there is particle segregation in the particle size distributi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/072C04B35/043
CPCC04B35/043C04B2235/3217C04B2235/3418C04B2235/3463C04B2235/3852C04B2235/9607C21C7/072
Inventor 徐业兴郭钰龙汪正峰郝不景李红霞戚静刘振国孙肖肖胡国伟
Owner 日照利尔高温新材料有限公司
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