Special pouring material for coal injection pipe

Abstract

The invention discloses a special pouring material for a kiln opening and belongs to the field of a refractory material. The special pouring material comprises the following components by weight percent: 10-25% of silicon carbide, 15-30% of andalusite, 20-35% of corundum, 5-15% of spinel powder, 5-10% of zircon mullite powder, 5-15% of aluminum oxide micro powder, 3-8% of silicon micro powder, 2-5% of pure calcium aluminate cement, and 0.5% and 0.2% of anti-explosion fibers and sodium tripolyphosphate serving as additives. The special pouring material is capable of efficiently improving the wear resistance and avoiding the hot peeling phenomenon of the cement kiln coal injection pipe, has the characteristics of high temperature resistance, heat vibration resistance, wear resistance, high strength, irreversible micro inflation, and the like, and is capable of greatly prolonging the service life of the cement kiln coal injection pipe.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a special casting material for coal injection pipes. Background technique [0002] At present, my country's new dry process cement production line is developing rapidly, so higher requirements are put forward for the use of refractory materials. The new dry process cement production technology widely adopts new technologies such as increasing combustion intensity, enhancing heat transfer effect, reducing heat loss and reducing environmental pollution, which has raised the cement production level to a new stage. However, due to higher temperature, more rapid temperature changes, stronger chemical erosion and more severe mechanical stress, the new dry process cement production line needs more refractory materials with excellent performance. [0003] The coal injection pipe of cement kiln is used in a harsh environment. The coal injection pipe should be inserted into the interio...

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Problems solved by technology

However, it still cannot meet the needs of customers, especially in some cement kilns with harsher operating environments. The current castables for coal injection pipes in cement kilns are not wear-resistant and prone to thermal spalling, which seriously restricts the increase in the operation rate of cement kiln production lines and affects the cement kiln. Manufacturer's economic benefits

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