Zirconium corundum refractory ball

A zirconium corundum-based refractory ball technology, applied in the field of metallurgy, can solve the problems of high porosity, shutdown, ball replacement, and low volume density of refractory balls

Inactive Publication Date: 2005-11-09
郑州豫兴氮氧结合耐火材料有限公司
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  • Abstract
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  • Claims
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Problems solved by technology

In use, the balls are naturally piled up to form a curved airflow channel to achieve heat exchange. However, due to the high porosity, low bulk density, low strength, and poor thermal shock stability of this refractory ball, it is easy to appear in use. Problems such as pulveriza

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  • Zirconium corundum refractory ball

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Embodiment Construction

[0005] The specific implementation of the present invention will be described in detail below in conjunction with specific conditions and process flow diagrams.

[0006] Provided by the technical scheme and process flow chart, the refractory ball of the present invention is composed of: corundum 75-85%, α-Al 2 o 3 5-10%, zircon concentrate 8-15%, clay powder (bonding agent) 5-8%, and the above-mentioned corundum, α-Al 2 o 3 It is made of lignin solution with 3-5% of the total weight of zircon concentrate and clay powder, among which corundum, α-Al 2 o 3 After wet milling and stirring with lignin solution, zircon concentrate, α-Al 2 o 3 , after stirring, add clay powder and grind evenly (the above is generally called mixed rolling), after being pressed into a spherical shape by a molding machine, it is dried in a drying furnace (residual water content 2 o 3 80-85% and ZrO 2 5-10%, refractoriness greater than 1790°C, load softening start temperature above 1550°C, densi...

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Abstract

A refractory zirconium corundum sphere for the air heater of blast furnace is proportionally prepared from conundum, alpha-Al2O3, zircon concentrate, clay powder and lignin solution through mixing, grinding, baking and sintering.

Description

1. Technical field [0001] The invention relates to metallurgical technology, in particular to a zirconium corundum refractory ball used in a hot blast stove of a metallurgical blast furnace. 2. Technical background [0002] Generally, the refractory balls used in the hot blast stove of the metallurgical blast furnace are mainly used for heat exchange and provide high blast temperature for the blast furnace. In use, the balls are naturally piled up to form a curved airflow channel to achieve heat exchange. However, due to the high porosity, low bulk density, low strength, and poor thermal shock stability of this refractory ball, it is easy to appear in use. Problems such as pulverization, broken balls, and bonding reduce the air flow channel and lower the air supply temperature, which eventually lead to frequent shutdowns, ball replacements, and overhauls; due to its small heat storage, it can only be used at 450m 3 It is used on the hot blast stove above the blast furnace. ...

Claims

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Application Information

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IPC IPC(8): C04B35/106
Inventor 刘世聚周福辰魏富军黄丙乾张德松范建超
Owner 郑州豫兴氮氧结合耐火材料有限公司
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