Formula of silicon carbide spray coating

Abstract

The invention discloses a formula of silicon carbide spray coating, comprising the following components: silicon carbide, mullite, alumina micropowder, silica micropowder and compound additive composed of sodium tripolyphosphate and methylcellulose. The formula comprises the following components in percentage by weight: 10-40% of the silicon carbide, 40-60% of the mullite, 10-20% of the alumina micropowder, 0-15% of the silica micropowder and 0-2% of the compound additive. When the spray coating prepared by the formula of the invention is used for spraying a rotary cement kiln, a spraying layer has small possibility of falling and has good stability and long service life.

Description

technical field [0001] The invention relates to a spray coating for a dry-process cement rotary kiln. Background technique [0002] With the rapid development of domestic new dry process cement rotary kiln, with the efforts of relevant domestic technical personnel, the refractory materials in the kiln have all been localized. In particular, the extensive use of unshaped refractory materials has reduced a lot of time for cement companies to put into production and build masonry. However, when using traditional products, when the castables at the kiln hood and tertiary air duct fall off, usually the kiln must be stopped for more than one day, and workers can enter the kiln to pry off part of the pouring material when the temperature drops to room temperature. It needs to be maintained for more than 3 days before it can be re-ignited and put into production. The shutdown time is very long and the construction labor intensity is high. Moreover, the combination effect of the cas...

AI Technical Summary

Problems solved by technology

However, when using traditional products, when the castables at the kiln hood and tertiary air duct fall off, usually the kiln must be stopped for more than one day, and workers can enter the kiln to pry off part of the pouring material when the temperature drops to room temperature. It needs to be maintained for more than 3 days before it can be re-ignited and put into production. The shutdown time is very long and the construction labor intensity is high. Moreover, the combination effect of the castable and the original residual lining is not ideal. It is easy to fall off after a period of use, and the service life is short

For example, the service life of the refractory material at the repaired kiln hood is only about half a year