A kind of whisker composite high-performance magnesia brick and its manufacturing method

Abstract

The invention relates to the technical field of refractory materials, particularly relates to the technical field of refractory materials for a refractory furnace permanent lining, an alloy metallurgical smelting furnace, a glass kiln regenerative chamber and a cement rotary kiln and particularly relates to a whisker composite high performance magnesia brick and a manufacturing method thereof. The whisker composite high performance magnesia brick comprises, by weight, 5-10% of fused magnesite of 5-8mm, 10-20% of fused magnesite of 3-5mm, 10-20% of fused magnesite of 3-0.074mm, 5-10% of fused magnesite of less than 0.074mm, 5-10% of high purity magnesite of 5-8mm, 5-15% of high purity magnesite of 3-5mm, 0-10% of high purity magnesite of 3-0.074mm, 5-10% of high purity magnesite of less than 0.074mm, 5-15% of recycled waste magnesium brick of 3-5mm, 5-15% of recycled waste magnesium brick of 0-3mm, 5-15% of magnesium oxide whiskers, 1-15% of magnesium borate whiskers, 2-5% of nano-magnesium aluminate adhesive dry powder and 2-5% of paper pulp.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, in particular to the technical field of a permanent lining for smelting furnaces, alloy smelting mining furnaces, glass kiln regenerators, and refractory materials for cement rotary kilns, especially to a whisker composite high-performance magnesia brick and its method of manufacture. Background technique [0002] Magnesia bricks are widely used in steelmaking furnace linings, ferroalloy furnaces and mixed iron furnaces in the iron and steel industry because of their good high temperature performance and strong resistance to alkaline slag; they are used in nonferrous metallurgical industrial furnaces such as: copper, lead, zinc, Tin furnace lining, but the thermal expansion of the existing magnesia bricks is relatively large, and the linear expansion coefficient increases with the increase of temperature, resulting in poor thermal shock stability of magnesia bricks, and the number of...

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Problems solved by technology

[0002] Magnesia bricks are widely used in steelmaking furnace linings, ferroalloy furnaces and mixed iron furnaces in the iron and steel industry because of their good high temperature performance and strong resistance to alkaline slag; they are used in nonferrous metallurgical industrial furnaces such as: copper, lead, zinc, Tin furnace lining, but the thermal expansion of the existing magnesia bricks is relatively large, and the linear expansion coefficient increases with the increase of temperature, resulting in poor thermal shock stability of magnesia bricks, and the number of water cooling is only 2-3 times, which cannot meet the requirements of use. Requirements; In addition, there are many defects in the use of magnesia-chrome bricks in the regenerator of the glass kiln and the firing zone of the cement rotary kiln, such as "hard and brittle" bricks that are easy to crack, and have poor toughness at high temperatures, which can no longer meet the requirements of the kiln. In addition, It contains Cr 6+ Ions are highly toxic and harmful to the environment, so it is necessary to use high-quality magnesia bricks instead of magnesia-chrome bricks

With the continuous development of my country's industry, product performance is constantly adjusted and optimized, the use conditions of refractory materials used in industrial kilns are more stringent, and environmental protection requirements are becoming more and more stringent. The magnesia bricks replace the existing products magnesia bricks and magnesia chrome bricks to meet the needs of industrial development and green environmental protection

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