What castables are used in different parts of cement kiln?

Cement kilns are subjected to high temperatures, high corrosion, and severe thermal shock during cement production. The use of appropriate refractory castables can ensure the long-term stable operation of the kiln. The refractory castables selected vary according to the working conditions and temperatures of different parts of the cement kiln.

Introduction of refractory castables for cement kiln

What castables are used in different parts of cement kilns: In general, high-alumina refractory castables should be used for kiln door covers, and high-strength alkali-resistant castables should be used for grate coolers. Wear-resistant castables should be used for parts of grate coolers that are prone to wear.

Wear-resistant castables can also be used at the back of the cement kiln, but they must be alkali-resistant. Steel fiber-reinforced refractory castables are also used. The front of the kiln is also a more demanding part, and high-end castables such as corundum mullite castables are also used, but they must be wear-resistant. However, the amount used is not large.

For the decomposition furnace at the end of the kiln, low cement castables are used, and the alkali resistance must be above level 2. The aluminum content cannot be less than 70%, but alkali-resistant castables must be used in the cone part, and alkali-resistant castables can also be used on the top. The strength requirement of alkali-resistant castables cannot be less than 60Mpa.

The coal injection pipe is not used in large quantities, but the requirements are extremely demanding. Some use corundum mullite castables, some use high-grade castables containing silicon carbide, and some use magnesium aluminum spinel castables. For the tertiary air duct, wear-resistant castables must be used, and the strength must reach 100. High-aluminum low-cement castables are also used for parts with light wear, and the volume density is required to be 2.6. In addition, in the mixed zone of the single-drum cooler, steel fiber castables and wear-resistant bricks are mixed and used.