The lime rotary kiln preheater and front and rear kiln mouths usually use refractory castables. However, the quality of preheaters and kiln mouths is different.
Although the lime shaft kiln feed inlet and the preheat zone lining are not used at high temperatures, they are washed and worn by the mechanical and airflow of the material and are damaged quickly. Steel fiber wear-resistant castables are used. The preheater uses steel fiber castables. The main reason for choosing steel fiber castables is their high wear resistance. It can resist the erosion of special parts of the kiln mouth.
The refractory materials used in lime kilns have a short service life and require a lot of repairs. Choosing appropriate refractory materials, improving the masonry process, and extending the service life of the kiln lining are issues of common concern to the users and castable manufacturers. According to the differences in various parts of the lime kiln, different refractory castables are used. Steel fiber-reinforced castables are used for the kiln head cover, and mullite high-strength wear-resistant castables are used for low walls of grate coolers that are prone to wear and tear. Some manufacturers also use wear-resistant bricks. For coal injection pipes, steel fiber high-strength wear-resistant refractory castables or corundum-mullite castables should be used.
The lime rotary kiln is a dynamic kiln, which is lined with refractory materials and is resistant to high temperatures. It can be chemically stable under high temperatures for a long time, has small shrinkage after re-sintering, high mechanical strength, dense structure, and low porosity. More wear-resistant and very corrosion-resistant. Especially in low-wall areas, the use of wear-resistant bricks will have a longer service life than castables. Due to the small amount of wear-resistant bricks used, many manufacturers still use steel fiber wear-resistant castables.
However, when constructing refractory materials, construction requirements must be strictly followed in order to fully achieve the effectiveness of various refractory castables. If it is a vertical kiln, the anti-crushing refractory castable should be used for the shrinkage of the splitting furnace, and the arc of the lower section of the cooling zone should be completely poured with heat-resistant concrete to prevent wind from running out of the brick joints. This masonry will improve the stability and wear resistance of the shaft kiln.
The lime kiln is mainly a piece of equipment used to produce industrial lime. Among them, the common kiln mouths include sleeve kiln, double chamber kiln, double beam kiln, rotary kiln, mixed vertical kiln, etc. The lime kiln mainly consists of the kiln body, feeding device, distribution device, combustion device, ash unloading device, electrical appliances, instrument control device, dust removal device, etc. When selecting refractory materials during lime kiln construction, the selection should be based on different kiln shapes and actual use conditions. Rongsheng Refractory Castable Materials Manufacturer is a powerful refractory material manufacturer. We can provide high-quality wear-resistant refractory castable products and other refractory materials products for lime kilns.
Lime kiln Lime calcining kiln has two types: vertical kiln and rotary kiln. Generally, castables are used in the lime rotary kiln preheater and the front and rear kiln mouth. However, the castables used in the two locations are different depending on the usage conditions.
Use refractory materials for the working layer. High alumina bricks (or clay bricks). The brick design of the rotary kiln is very important. In the high-temperature combustion section and cloth blanking impact section, refractory castables should be used to replace the refractory bricks in the working layer. Has better integrity, wear resistance, and fire resistance.
Use refractory materials for the heat insulation layer. Except for the stove top, lightweight refractory bricks + refractory fiber layer are used.
Use refractory materials for the burner. It is required to use mullite refractory castables to pre-make large burning bricks in advance for direct installation and use.
Use refractory materials for flue gas pipes. Generally, fire-resistant coating materials are used, which are easy to construct and durable.
The refractory materials used in lime kilns must be selected according to the conditions of the kiln when selecting the refractory lining. In short, suitable furnace lining will create productivity.
