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Preparation method of high-strength high-alumina refractory ball for smelt

A technology of high alumina balls and refractory balls, applied in blast furnaces, blast furnace details, blast furnace parts, etc., can solve problems affecting the heat exchange of hot blast stoves, poor thermal conductivity, and high apparent gas rate, so as to improve the softening point under load and prolong the service life Effects of life and bulk density increase

Inactive Publication Date: 2006-07-26
刘宗合
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AI Technical Summary

Problems solved by technology

The high apparent gas rate of the upper sphere can lead to small heat capacity, poor thermal conductivity, and is also vulnerable to erosion and falling off by the atmosphere in the furnace, which seriously affects the heat exchange of the hot blast stove

Method used

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Experimental program
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Embodiment Construction

[0009] The present invention will be further described below in conjunction with embodiment.

[0010] The invention provides a high-alumina ball with an aluminum content of more than 55%. It uses the finished high-alumina ball as a bone body, and after the finished high-alumina ball is dipped, a layer of high-alumina fine powder is adhered on its surface to make it into a phosphide Combined high-strength high-alumina balls, the preparation method of which is:

[0011] 1. Put the finished high alumina ball into a container filled with diluted phosphoric acid and impregnate it with phosphoric acid or phosphate solution, aluminum sulfate solution or water glass. The immersion time is more than 24 hours. Take it out and control it until it stops dripping.

[0012] 2. Put the impregnated high-alumina balls into the mixer. According to the weight of the high-alumina balls in the mixer, spray the mixture of high-grade high-alumina fine powder and coagulant into the mixer or ball-disc...

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Abstract

The preparation method for smelting refractory ball with high strength and aluminum comprises: putting the finished high-aluminum ball into the container with diluted adhesive to dip the ball with phosphoric acid and then lead into the mixer; according to the weight of ball in mixer, adding the mixture of high-aluminum power and coagulant, stirring to let the ball rotate and stick one high-aluminum power on surface; putting the ball into low-temperature roasting furnace, and obtaining the final product. This invention can fill the air pore, crack and dissolved hole well, and improves aluminum ball properties.

Description

technical field [0001] The invention relates to a smelting medium, in particular to a method for preparing high-strength and high-aluminum refractory balls for smelting used in hot blast regenerators of blast furnaces of less than 450 cubic meters in small and medium-sized smelting iron and steel plants. Background technique [0002] At present, the high alumina balls used in small and medium-sized smelters in my country are all made of clay fine powder as the binding material and high alumina clinker crushed into particles as the aggregate. After the clay reaches the bonding temperature of ceramics at about 1200°C, it is cooled out of the kiln to make finished high-alumina balls. During the firing process, due to the pressure, moisture, burning loss of low-temperature substances, the deviation of filling materials into the mold, the size of the sphere is limited by the mold when the sphere is formed, and the shrinkage of the clay after bonding, etc., the high-alumina ball wi...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/10C21B9/10
Inventor 刘宗合
Owner 刘宗合
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