Castable for rotary cement kiln gate

Abstract

The invention aims to provide castable for a rotary cement kiln gate. The castable is high in wear resistance and thermal shock resistance and is specially used in the novel dry process cement production process. The castable is characterized by being prepared from, by weight, 1% of Taiyuan purple flower gangue, 15-25% of micropore mullite, 10-20% of silicon carbide, 23-30% of ferrochromium slag, 5-10% of zinc ferrite, 5-8% of magnesia-zirconia olivine, 1-3% of magnesium potassium titanate, 1-2% of nitrogen tri-zirconium aluminate, 3-5% of clinoenstatite, 5-10% of alumina micro powder, 2-3% of zirconium calcium aluminate and 3-5% of high-alumina cement; 0.5% of Ti3SiC2, 0.1% of methallyl alcohol polyethenoxy ether, 0.05% of isopentenol polyethenoxy ether, 0.1% of aluminium potassium sulfate dodecahydrate and 0.05% of potassium chromium alum dodecahydrate are additionally added.

Description

technical field [0001] The invention belongs to the field of refractory materials, and in particular relates to a castable for a gate plate of a tertiary air duct of a cement rotary kiln 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...

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