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Cleaning-free air brick with uniform structure and manufacturing method thereof

A breathable brick, uniform technology, applied in the direction of manufacturing tools, casting molten material containers, metal processing equipment, etc., can solve the problems of macroscopic defects of breathable bricks, unsuitable for social industry, high slit breathable bricks, etc. Uniform pressure and good corrosion resistance

Active Publication Date: 2017-05-10
LUOYANG XUANSHI HIGH TEMPERATURE MATERIALS CO LTD
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AI Technical Summary

Problems solved by technology

[0004] At present, most of the air-permeable bricks used in the iron and steel industry are formed by one-time casting, using the macroscopic slits produced by the burnt matter as the argon gas channel. The macroscopic slit is used as a ventilation channel, which is generally referred to as "slit-type breathable brick". The slit-type breathable brick has greatly promoted the development of the steel industry in an era, but the slit itself has caused the macroscopic Defects, in the process of use, especially the current demand for special steel types, molten steel is easy to penetrate through the slits, and the slit permeable bricks require a high degree of manual cleaning operations, which is not in line with the current social and industrial development

Method used

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  • Cleaning-free air brick with uniform structure and manufacturing method thereof
  • Cleaning-free air brick with uniform structure and manufacturing method thereof
  • Cleaning-free air brick with uniform structure and manufacturing method thereof

Examples

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Embodiment Construction

[0040] The following examples describe the present invention in detail:

[0041] 1. Make consumable core ① and safety core ②, the ratio of raw materials is as follows:

[0042]

[0043] The binder ratio is as follows

[0044]

[0045]

[0046] 1.1, prepare materials according to the formula, and pre-dissolve the binder;

[0047] 1.2. When mixing and milling, first pour in the raw materials with a particle size greater than 180 mesh, mix well and then add the binder, then add the raw materials with a particle size less than or equal to 180, and mix for 5 minutes;

[0048] 1.3. Weigh a fixed amount of the mixture, add it into an elastic mold and seal it, and form it under an isostatic press.

[0049] type, the molding pressure is controlled at 65MPa, and the holding time is 20 seconds.

[0050] 1.4. Bake the consumed core ① adobe at 150°C for 12 hours after demoulding.

[0051] 1.5. Burn the adobe of the consumable core ① after demoulding at a temperature of 1650°C fo...

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Abstract

The invention discloses a cleaning-free air brick with a uniform structure and a manufacturing method thereof. The air brick is technically characterized in that refractory raw materials such as chrome corundum, corundum and mullite are selected for one-time allowance-free net forming through an isostatic press, air bricks made from corresponding materials can be selected according to ladle working conditions and smelting requirements, the material of an air-permeable part is uniform in structure, penetration of molten steel is reduced in a using process, uniform and stable air permeability is achieved, the using and operating cost is reduced, and the production cycle of an air brick product is also shortened.

Description

technical field [0001] The invention relates to the field of refractory materials for refining outside the furnace of the iron and steel industry, in particular to an argon gas supply system at the bottom of a ladle. Background technique [0002] In recent years, my country's iron and steel industry has developed rapidly, with severe excess steel production capacity. The iron and steel industry has seriously affected my country's natural environment. Based on this situation, in accordance with the direction of national policies and the needs of the market economy, as far as the field of refractory materials is concerned, it is necessary to reduce costs and increase production capacity. It is an urgent need to improve the technical content and the use effect of products; on the other hand, the labor cost in our country is increasing year by year. Therefore, it is also an urgent need for the current industrial development to improve the automation of production materials. At lea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66B22D41/02
Inventor 张小旭陈瑞峰
Owner LUOYANG XUANSHI HIGH TEMPERATURE MATERIALS CO LTD
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