High temperature and alkali corrosion resistant special castable for smoke chamber of rotary cement kiln

Abstract

The invention relates to the technical field of castable production, and discloses a special castable with high temperature and alkali corrosion resistance for a smoke chamber of a rotary cement kiln. The invention relates to an explosion-proof spinel brick, which is prepared from the following components in percentage by weight: 30 to 40 percent of spinel micro powder, 10 to 18 percent of aluminate cement, 10 to 15 percent of tabular corundum fine powder, 6 to 18 percent of chromic oxide fine powder, 0.1 to 0.35 percent of polycarboxylate dispersing agent, 1 to 5 percent of zirconium oxide powder, 0.1 to 0.15 percent of water reducing agent, 0.05 to 0.15 percent of organic explosion-proof fiber and the balance of natural mullite with various particle sizes. The raw materials are subjected to grinding, mixing, vibration molding, maintenance and heat treatment to be processed into the castable. According to the invention, the tolerance of the castable to high temperature and alkaline corrosion can be enhanced, the service life of the castable is prolonged, and the use effect is ensured.

Description

Technical field [0001] The invention relates to the technical field of castable production, and in particular to special castables for resisting high-temperature alkali erosion in cement rotary kiln smoke chambers. Background technique [0002] The smoke chamber of a cement rotary kiln is generally affected by problems such as the firing temperature of the rotary kiln, the ventilation conditions in the kiln, whether the kiln tail seal is up to standard, the temperature of the decomposition furnace and the thermocouple in the smoke chamber. In addition, the alkaline substances in the rotary kiln are The concentration of volatilization in this part during the working process will cause the structure of the rotary kiln smoke chamber to deform, and it is easy to cause damage to the refractory lining inside the rotary kiln smoke chamber, affecting its service life; existing In technology, refractory castables usually use a large amount of low cement castables and ultra-low cement...

AI Technical Summary

Problems solved by technology

[0002] The smoke chamber of cement rotary kiln is generally affected by the firing temperature of the rotary kiln, the ventilation in the kiln, whether the seal of the kiln tail is up to standard, the temperature of the calciner, and the thermocouple of the smoke chamber. The enrichment in this part due to volatilization during the working process will cause the deformation of the smoke chamber structure of the rotary kiln, and the refractory lining inside the smoke chamber of the rotary kiln will easily be damaged, which will affect its service life; the existing In technology, refractory castables usually use a large amount of low-cement castables and ultra-low-cement castables, and add pure calcium aluminate cement as a binder. Al in slag 2 o 3 and SiO 2 and other components react to form a low-melting point phase, which reduces the high temperature resistance of the castable to a certain extent. In addition, the particle gradation accumulation degree between the various raw materials of the castable in the prior art is poor, which affects the castable. Alkali corrosion resistance also has a certain negative impact