Abrasion-resistant anti-erosion pouring material for cement kiln tertiary air duct

Abstract

The invention relates to the field of refractory materials, in particular to an abrasion-resistant anti-erosion pouring material for a cement kiln tertiary air duct. The abrasion-resistant anti-erosion pouring material is prepared from, by weight, 20-50 parts of white corundum, 18-30 parts of mullite M45, 15-40 parts of fused magnesium aluminate spinel, 10-30 parts of fused hercynite, 3-5 parts of zirconium carbonate, 3-5 parts of silicon carbide, 2-3 parts of silica micro powder, 2-8 parts of alumina micro powder, 0.1-1 part of sodium tripolyphosphate and 5-10 parts of additionally added binding agents. The fused magnesium aluminate spinel comprises 15-25 parts of fused magnesium aluminum pointed crystal particles ranging from 5 mm to 8 mm in particle size, 5-20 parts of fused magnesium aluminum pointed crystal particles ranging from 3 mm to 5 mm in particle size, 5-15 parts of fused magnesium aluminum pointed crystal particles ranging from 1 mm to 3 mm in particle size and 5-15 parts of fused magnesium aluminum pointed crystal particles ranging from 0 mm to 1 mm in particle size. The fused hercynite comprises 10-20 parts of fused hercynite particles ranging from 5 mm to 8 mm in particle size, 5-15 parts of fused hercynite particles ranging from 3 mm to 5 mm in particle size, 5-10 parts of fused hercynite particles ranging from 1 mm to 3 mm in particle size and 5-10 parts of fused hercynite particles ranging from 0 mm to 1 mm in particle size. The white corundum is formed by mixing white corundum with the particle size ranging from 1 mm to 5 mm with white corundum with the particle size ranging from 6 mm to 10 mm according to the mass ratio of 1:3-5. The pouring material is high in abrasion resistance, good in high temperature resistance and high in thermal shock resistance.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a wear-resistant and corrosion-resistant castable for a tertiary air duct of a cement kiln. Background technique [0002] Due to the high temperature and severe material erosion of the tertiary air duct of the cement rotary kiln, the straight pipe, elbow, and straight wall, the material has a heavy alkaline component and strong chemical erosion. Traditional refractory materials are used in this part, resulting in frequent damage and short life. not long. At present, the rotary kiln has relatively strict requirements on the construction period, which requires a short construction period, fast kiln drying, and can be put into production and use relatively quickly, which puts forward higher requirements for the lining material. At present, the existing wear-resistant castables on the market generally have defects such as low wear resistance, poor high temperature resistance and ...

AI Technical Summary

Problems solved by technology

At present, the existing wear-resistant castables on the market generally have defects such as low wear resistance, poor high temperature resistance and poor thermal shock resistance. The service life of the tertiary air duct is generally very short, even two to three months. It has been basically damaged and it is difficult to meet the needs of the market

[0003] 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. Not high, poor high temperature resistance and poor thermal shock resistance, etc., not suitable for the preparation of wear-resistant and anti-erosion castables for cement kiln tertiary air ducts