Process technology of producing fly ash ceramsite by rotary kiln

Fly ash ceramsite is mainly based on fly ash,by ingredients, processing granulation or into the ball, high temperature roasting (1200 ~ 1300 ℃) made of artificial lightweight aggregate. Its interior has a closed microporous structure that was gray lead-gray or black ceramic-like material, the surface has a dense hard glaze layer that was brown ash, iron gray or dark red. According to the need, it can produce different particle size, generally 5 ~ 20mm, mainly used in the construction field.

Fly ash is unburned small particles in the combustion process of coal, with the flue gas flow out of the furnace, collected by the collection system to catch an inorganic residue, is the power plant and industrial boiler business waste, massive emissionses not only occupy land,but also cause environment pollution , only by taking various of ways to digest and use, can ensure that power plants and related enterprises to successfully produce and protect the surrounding environment. The usage of rotary kiln production of fly ash sintered ceramic powder in line with the national comprehensive utilization of fly ash planning and industry and tax policy, there is a huge space for development and application potential.

Fly ash itself does not bond, sintering ceramsite need to add some adhesive, pre-ball, material ball has a certain strength, can only be sent to the rotary kiln for firing. Based on the binder, sometimes it is necessary to pre-cure the pre-fired ceramsite to obtain strength and then to be fired.

General in the process of fly ash production by rotary kiln, clay and other binder materials occupy most of the proportion of fly ash as a minor component in the reaction, so choosing process is the ratio of fly ash and clay , Mixing, after the granulation of the roller granulator extrusion, simple treatment into the kiln firing. In this process, the amount of fly ash is less.

If you need a large amount of fly ash ceramisite production, there are two production lines to choose. One is sintering machine production process, the other is the rotary kiln production process. Sintering process after a long time that there are some difficult to overcome the current difficulties, the production method has not been extended and developed. Rotary kiln process and the previous rotary kiln process the biggest difference is to meet more than 80% of the amount of fly ash doping, and can achieve large-scale solid waste utilization, the production of ceramic can be re-processed, made of insulation thermal insulation products in the construction industry has been a large number of applications.