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Preparation method for gas permeable brick with straight through type gas channels

A breathable brick and straight-through technology, which is applied in the field of refractory materials, can solve the problems of increased production cost of breathable bricks, poor refining effect, small airway size, etc., achieve excellent thermal shock resistance, improve blowing rate, and airway performance Optimized effect

Active Publication Date: 2013-05-22
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the size of the gas channel is small, the gas flow rate is small, and the refining effect is poor; and the use of high-grade refractory raw materials will increase the production cost of breathable bricks

Method used

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  • Preparation method for gas permeable brick with straight through type gas channels
  • Preparation method for gas permeable brick with straight through type gas channels
  • Preparation method for gas permeable brick with straight through type gas channels

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0027] Embodiment 2: as Figure 4 , Figure 5 , Figure 6 As shown, another method for preparing a straight-through airway permeable brick requires 30 straight-through airways, and the size of the airway 3 is 300mm×15mm×0.2mm; the prepared slurry is prepared by The material is evenly spread on the plastic lost material. The size of the plastic lost material is 400mm×15mm×0.2mm. The height of slurry application is 310mm and the thickness is 1mm. It has a certain strength and is closely attached to the plastic burnt objects; 30 coated plastic burnt objects are fixed in the mold, poured with castables, and made into bricks. After firing at 1000°C, 30 coated plastic burnt objects Lost objects create 30 straight-through airways in the adobe.

Embodiment 3

[0028] Example 3, a straight-through air brick with 36 straight-through air passages made by a process similar to that of embodiment 2, and the size of the air passages is 350mm×17mm×0.25mm.

[0029] The use of high-grade refractory materials with good performance to produce straight-through airway permeable bricks is the method adopted by many enterprises now; the high-grade refractory materials and molten steel have a large wetting angle, which can effectively prevent the steel from seeping through the airway, improve the blowing rate, and at the same time It also has good high-temperature performance; however, the use of high-grade refractory raw materials increases the production cost of the breathable brick; the present invention treats the air passage part of the breathable brick separately, and has a large wetting angle for molten steel, and the molten steel is not easy to penetrate, and at the same time has good high-temperature performance. The refractory raw material ...

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Abstract

The present invention relates to the technical field of refractory materials, and relates to a preparation method for a gas permeable brick with straight through type gas channels. According to the method, the gas channel wall of the gas permeable brick is provided with a smooth and dense coating (1); the surface of a burn-out material is coated with a prepared slurry; the burn-out material with the slurry coated surface is subjected to a pretreatment, and is placed inside the brick blank, wherein the burn-out material placing position is the position requiring arrangement of the gas channel;after the brick blank is sintered, the burn-out material burns out to form the gas channel (2), and the coating on the surface of the burn-out material is positioned on the wall of the gas channel, and forms the smooth and dense gas channel wall; or the slurry is coated on the surfaces of a plurality of ceramic core plates (3), a pretreatment is performed, a plurality of the ceramic core plates (3) are placed in a mold to prepare the brick blank, the required gas channel (2) are formed between the ceramic core plates, after the brick blank is sintered, the smooth and dense wall surface is obtained on the wall of the straight through type gas channel of the gas permeable brick. The gas permeable brick of the present invention has characteristics of strong steel liquid and slag penetration resistance, strong steel liquid and slag corrosion resistance, stable flow, high blowing-through rate, long service life, simple production process, and low cost.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a method for preparing a straight-through airway permeable brick. Background technique [0002] The bottom argon blowing process for refining outside the furnace is to blow high-pressure inert gas (argon) into the ladle to stir the molten steel through the breathable brick installed at the bottom of the ladle furnace, so as to make the composition and temperature of the molten steel uniform and achieve the purpose of refining. Therefore, the performance of the permeable brick is very important to the reliability and safety of the refining process outside the furnace. [0003] At present, most of the mainstream ventilation bricks use straight-through air channels. The air channel can be made by embedding pre-synthesized ceramic rods and ceramic core plates in bricks, or pre-embedded burnt objects. The straight-through air channel has stable air flow, good stirring e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B38/06
Inventor 陈卢张志雄尹洪丽刘鹏张立明张晖齐志刚余同署毛庆龙
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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