Using coal gangue rotary kiln production ceramsite rawmaterials is to use the coal gangue raw materials and other ore mineralscalcined process such as processing, its main process including raw materialprocessing, granulating and hot working, the coal gangue ceramsite production line in thegranulating process can be divided into dry process and grinding into a ball.
Using coal gangue rotary kiln production ceramsite rawmaterials is to use the coal gangue raw materials and other ore mineralscalcined process such as processing, its main process including raw materialprocessing, granulating and hot working, the coal gangue ceramsite production line in the granulating process can be divided into dry process and grinding into a ball.
1. Dry process: the raw materials collectedby two or three broken, sieved into the required size of the raw material canbe. This process is simple, less investment, but only for the quality of veryuniform hard raw materials, cannot be mixed with admixture method to adjust thenature of raw materials.
2. Powder into the ball method: Thegranulation process for raw material quality is not uniform, poor expansion.The raw materials processing and granulation process, including coarsecrushing, drying, grinding and ball, the process is complex, a largeinvestment, but its biggest advantage is that according to the designrequirements, mixed with additives to adjust the chemical composition, type,excellent grade of ceramsite.
In the coal gangue rotary kiln thermalprocessing technology, including drying, preheating and roasting and coolingthree processes. The expansion of the raw material ball depends mainly on theheating rate of 200-600 ℃ preheating section, the faster the heating rate, the better thematerial expansion; with the following; With the temperature increase, thesoftening of the material in the expansion zone (temperature 1100 to 1200 ℃) tocomplete, then the internal gas escape, the formation of pressure, to promotethe ball expansion. Preheating and roasting are the most important processes ofceramic firing, but the cooling process also has a great impact on the qualityof the ceramsite. In general, the calcined ceramsite is rapidly cooled to1000-700 ° C at the highest temperature of the expanded zone and slowly cooledat 700-400 ° C to avoid large stresses in crystallization and cure, up to 400 °C rapid cooling.
Coal gangue through the crusher afterprocessing, can be processed in the raymond mill size, and then through theraymond mill grinding to 200 mesh, into the biaxial mixer, and add a certainamount of material in accordance with the mixing, through the granulator afterthe material is granulated, it enters the rotary kiln and is calcined, and thenthe material is cooled and processed by a cooler.