Rotary kiln in building material, metallurgy, chemical industry, environmental protection and many other production industry, rotary drum equipment is widely used in mechanical, physical or chemical processing of solid material, such equipment is called a kiln. The application of rotary kiln originated in cement production, in 1824 the cement work o J, invented the intermittent operation of soil vertical kiln; Germany 1883 DE, who invented the continuous operation of the multilayer kiln; 1885 britons Sam (ERansome) invented the rotary kiln, in Britain, the United States after a patent it into production, soon get considerable economic benefit. The invention of the rotary kiln, the cement industry rapid development, but also promoted the people research on the application of the rotary kiln, rotary kiln is widely used in many industrial fields quickly, and more and more important in the production, become the core of the enterprise production equipment accordingly. In the field of application of rotary kiln, the cement industry in the largest number.
We will only do with wet rotary kiln process to introduction and analysis. Wet rotary kiln kiln body is usually long (the length to diameter ratio is 30 ~ 40), to increase the heat transfer area of the kiln, often in preheater points of hanging chain, accelerate the evaporation. Wet rotary kiln production when adding water in the raw meal grinding, will be made water cut is 30% ~ 40% of raw slurry, it met the requirement of the homogenization of slurry from the kiln head mature, material feeding machine into stove kiln clinker cooling by the cooling machine, into clinker silo, raw coal after drying and grinding into a pulverized coal combustion supplies to clinker calcining heat required.
Wet rotary kiln calcination is characterized by: as the raw material made of mud, so the heterogeneity strong adaptability to raw materials, raw ingredients evenly, process stability, high quality of the clinker burning, clinker strength grade is high, the little dust in the process of grinding, preheater of fly ash. But when wet production evaporation of 30% ~ 40% slurry water, need to consume large quantity of heat, 1/2 ~ 1/3 of the cost of cement, energy consumption was dry-process rotary kiln and vertical kiln and are high. Wet production due to their high heat consumption, energy consumption, water consumption and production, consumption of water resources, China has put the wet type selection kiln cement production as a limitation.
The process flow
1, ceramsite rotary kiln equipment by rotary cylinder wheel support device, supporting device, with and kiln head, sealing device, coal injection pipe device and other parts.
2, kiln body and the level of a certain slope, whole kiln body by supporting roller device, and control the kiln body jumped up and down to move the catch wheel device.
3, transmission parts, besides setting main drive is set up to ensure that when the main drive power is cut off can still make the kiln body slow rotation of kiln body, auxiliary transmission device. Everlast kiln head adopts clamshell seal, preheater with axial contact sealing device, ensure the reliability of the seal.
(4, working temperature 950 ℃ ~ 1050 ℃) between ultrafine calcined kaolin, ceramsite sand on operation process, and then based on what material to adjust temperature, finally achieve what you want, practice has proved that the calcining technology: low energy consumption, product after dehydration, decarburization whitening, performance stability is good.