Castable for air duct damper

Abstract

The invention aims at providing a castable for an air duct damper. The castable is provided aiming at the defects in the prior art, and is resistant to high temperature, high in wear resistance and high in alkali corrosion resistance. The other objective of the invention is to provide a preparation method of the castable. According to the technical scheme, the castable is prepared from, by weight, 15%-25% of tabular corundum, 10%-20% of silicon carbide, 23%-30% of ferrochromium slag, 5%-10% of zinc ferrite, 5%-8% of magnesia-zirconia olivine, 1%-3% of potassium magnesium titanate, 1%-2% of nitrogen zirconium aluminide, 3%-5% of clinoenstatite, 5%-10% of alumina micro powder, 2%-3% of zirconia calcium aluminate, 3%-5% of high-alumina cement, 1% of additional Taiyuan purple flower rock, 0.5% of Ti3SiC2, 0.1% of VPEG, 0.05% of TPEG, 0.1% of aluminum potassium sulfate dodecahydrate and 0.05% of potassium chromium alum dodecahydrate.

Description

technical field [0001] The invention belongs to the field of refractory materials, and in particular relates to a pouring material for an air duct shutter and a preparation method thereof. Background technique [0002] Along with the construction upsurge that heats up continuously in our country, the demand for cement is increasing continuously on the market, and the cement factory is also constantly improving the cement manufacturing process. Since the gate of the tertiary air duct on the new dry process cement production line is used to adjust the hot air consumption of the rotary kiln and calciner, the flexible adjustment of the gate will directly affect the clinker production quality and system heat consumption. The castables used in the original tertiary air duct shutters have poor wear resistance. Because the hot air in the tertiary air ducts contains a large amount of tiny hot clinker, the castables for the conventional product rams are severely peeled off, resulting ...

AI Technical Summary

Problems solved by technology

The castables used in the original tertiary air duct shutters have poor wear resistance. Because the hot air in the tertiary air ducts contains a large amount of tiny hot clinker, the castables for the conventional product rams are severely peeled off, resulting in inflexible adjustment of the tertiary air ducts, resulting in kiln abnormal operation of the system

Because the gate is in the tertiary air pipe, it is often washed by the tertiary air, and the temperature of this part changes greatly, the thermal shock is very strong, and the alkaline atmosphere in the hot air is heavy. Due to the defect of material selection, the current castable The service life is less than 6 months, which seriously restricts the operation of the cement production line, affects the production efficiency, increases the production cost, and does not meet the national energy saving and emission reduction requirements