Casting material for prefabricated brick for feeding chamber and preparation method of casting material

Abstract

The invention relates to the field of refractory materials, and in particular relates to a casting material for prefabricated bricks for a feeding chamber. The casting material comprises the following components in parts by weight: 20-50 parts of white corundum, 18-30 parts of mullite M45, 15-40 parts of electric smelted magnesium aluminate spinel, 10-30 parts of electric smelted hercynite, 3-5 parts of zirconium carbonate, 2-3 parts of silicon micro powder, 2-8 parts of alumina micro powder, 0.1-1 part of sodium tripolyphosphate, 4-8 parts of aluminum oxynitride, 5-9 parts of Lafarge cement, 3-5 parts of a preservative solution, 5-10 parts of a first external binding agent, 2-7 parts of a second external binding agent, 3-7 parts of a first solid additive and 1.5-6 parts of a second solid additive, wherein the preservative solution is prepared by preparing a first primary mixed liquid and adding other components in sequence; the electric smelted magnesium aluminate spinel comprises 15-25 parts of electric smelted magnesium aluminate spinel granules of 5-8mm, 5-20 parts of electric smelted magnesium aluminate spinel granules of 3-5mm, 5-15 parts of electric smelted magnesium aluminate spinel granules of 1-3mm and 5-15 parts of electric smelted magnesium aluminate spinel granules of 0-1mm. The casting material is good in prefabricated brick strength, a cement clinker is unlikely to adhere to prefabricated bricks, and the service life is longer than 3 years.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a pouring material for prefabricated bricks for feeding chambers and a preparation method thereof. Background technique [0002] In the new dry process kiln, the calciner cone, feeding chamber, kiln tail slope, etc. are prone to material blockage. The impact of air cannons, water cannons and even iron rods will seriously damage the castables, and the kiln is often shut down for maintenance. The castables used in these parts are required to have higher high temperature resistance and better alkali resistance, wear resistance and thermal shock stability. Usually, these parts use steel fiber castables or high-alumina low-cement castables. During the process of use, there will always be the problem of cement raw meal crusting and clogging, that is, the raw meal in the feeding chamber will appear in liquid phase prematurely, and it will adhere to form a layer in the feeding chamber...

AI Technical Summary

Problems solved by technology

The castables used in these parts are required to have high high temperature resistance and good alkali resistance, wear resistance and thermal shock stability. Usually, steel fiber castables or high aluminum low cement castables are used in these parts. During the process of use, there will always be the problem of cement raw meal crusting and clogging, that is, the raw meal in the feeding chamber will appear in liquid phase prematurely, and it will stick to form a layer in the feeding chamber, which is called skinning. In severe cases, it will cause blockage and lead to The ventilation is not smooth, the thermal system is disordered, the decomposition rate of the cement calciner is reduced, and the coal consumption is increased

For example, the announcement number is CN104355646A (2015-02-18), a cement kiln mouth castable, although it can reduce the problems of many pores and uneven distribution of pores, but the shedding phenomenon of the castable is still not improved. It is not suitable for the preparation of castables for prefabricated bricks for feeding chambers due to defects such as low heat resistance, poor high temperature resistance and weak thermal shock resistance.