12000 T/D kiln outlet special-use castable

Abstract

The invention discloses a 12000 T / D kiln outlet special-use castable and belongs to the field of fireproofing materials. The castable inclues the components, by weight, 15-25% of mullite, 10-20% of sillimanite, 25-30% of tabular corundum, 5-10% of strontium titanate powder, 5-8% of zirconium dioxide powder, 1-3% of zinc-aluminium spinel powder, 3-5% of boron nitride, 5-10% of aluminum oxide micro powder, 4-6% of pure calcium aluminate cement, 0.2% of polylactic acid fibers, 0.1% of sodium hexametaphosphate, 0.1% of leucite and 0.1% of C12H14N4O5S2. The castable is improved in thermal shock resistance, high-temperature resistance, volume stability and wear resistance, is high in strength, is improved in the defects that a kiln outlet is not wear-resistant and is poor in thermal shock resistance, and can prolong the service life of a kiln outlet of a cement kiln from about 10 months to 2 years and more.

Description

technical field [0001] The invention relates to the field of high-temperature materials for building materials, in particular to a special castable for cement kiln mouths. Background technique [0002] At present, my country's new dry process cement production line is developing rapidly. In 2013, the cement production capacity has exceeded 2.1 billion tons, and the cement production capacity is seriously overcapacitated. Therefore, how cement companies improve productivity and maximize profits is the only way to compete in the market. Improving the operation rate of the cement production line is an important condition for improving the production efficiency of the cement kiln and earning economic benefits. However, because the cement kiln is subject to higher temperature, severe temperature changes, strong chemical erosion and severe mechanical stress, the new dry process cement production line needs more excellent performance refractory materials. [0003] The working con...

AI Technical Summary

Problems solved by technology

Kiln mouth castables have developed from traditional high-alumina high-strength castables to high-performance low-cement castables characterized by the addition of ultrafine powder and high-efficiency water reducers. The existing corundum-spinel castables (such as patent CN101407424A), corundum - Mullite castables (such as patent CN101445379B) and other low-cement castables, although the overall performance of the castables have been improved, the service life of the kiln mouth has been extended from 4-6 months of the traditional use of high-alumina high-strength castables to About 10 months, prolonging the life of the cement kiln mouth, but still can not meet the needs of customers, especially in some cement kilns with harsher use environment, the current kiln mouth pouring material is not wear-resistant and easy to peel off, which seriously restricts the cement kiln production line The increase in operation rate has affected the economic benefits of cement manufacturers

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