Andalusite corundum anti-dropping gunning refractory

Abstract

The invention discloses an andalusite corundum anti-dropping gunning refractory, wherein the andalusite corundum is arranged in the middle of the andalusite corundum anti-dropping gunning refractory, and a refractory layer coats on the outer part of the andalusite corundum anti-dropping gunning refractory; and wear-resisting layers cover the upper and the lower end parts of the andalusite corundum refractory layer. The andalusite corundum anti-dropping gunning refractory is characterized in that the andalusite corundum is provided with bumps, wherein the wear-resisting layers are provided with grooves adaptive to the bumps, and the bumps can be tightly combined with the grooves. Compared with the prior art, the andalusite corundum anti-dropping gunning refractory is high in refractoriness, is resistant to thermal shock, is good in stability and is strong in wear resistance, so that the service life of the product is prolonged, and the maintenance cost of the product is reduced; and meanwhile, the bumps between the andalusite corundum and the wear-resisting layers are blocked with the grooves, so that the anti-dropping function is greatly improved.

Description

technical field [0001] The invention belongs to the field of refractory materials, and in particular relates to an alumina low-cement spraying material. Background technique [0002] With the rapid development of my country's building materials industry, the demand for cement is increasing day by day. In the large-scale cement dry process production line, the refractory material at the coal injection pipe and the kiln mouth is the key, which is very important for the continuous and normal operation of the cement kiln. . The cement kiln equipment imported from abroad and the pouring material for the coal injection pipe have a short service life. [0003] The working environment of the coal injection pipe is harsh, and the requirements for refractory materials are also strict. Not only high temperature resistance and good thermal shock stability are required, but also high mechanical strength and wear resistance are required, and the outlet of the coal injection pipe must not ...

AI Technical Summary

Problems solved by technology

The pouring material of ordinary coal injection nozzle has no fixed shape, it is a layer of pouring material spread on the kiln mouth or a circle around the nozzle mouth, if it is directly laid on the kiln mouth in one layer, it is easy to cause no refractory material covering the coal injection pipe , affecting the temperature in the kiln, bringing about a drop in work efficiency, and even causing a safety hazard; if it is directly surrounded by the coal injection nozzle, due to the non-fixed shape of the castable, it is easy to block the nozzle and cause insufficient coal injection, which prolongs the production time. working hours, increasing the cost of work

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