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4.7m*72m Large Capacity Cement Rotary Kiln
ZK developed large new dry process cement rotary kiln product with cement research and design institutes in ZheJiang , HangZhou and HangZhou by using domestic advanced technology, and the product can match 3000~10000t/d large new dry process cement production line. The company has a first-rate rotary kiln development, research and design team, perfect test and inspection means and excellent large rotary kiln manufacturing equipment and manufacturing technology, and has formed a complete EPT and production system integrating rotary kiln design, manufacture, install and debugging service.
It has features of energy saving, high productivity, decarburization whitening, simple structure, long lifespan, easy maintenance, etc.
Wet and Dry Cement Rotary Kiln
Cement Plant, Steel Mill, Chemical Plant & Incinerator
ZK Cement rotary kiln technical characteristics:
♦ Kiln body is made of high quality composed of carbon steel or alloy steel plate and automatic welding;
♦ Tyre,Support Roller,Open gear adopts alloy cast steel;
♦ Sliding bearing with large gap not scraping tile bearing;
♦ Transmission device adopts hard tooth surface reducer, flexible diaphragm coupling, dc motor;
♦ Adopts hydraulic gear wheel;
♦ Preheater scales were used respectively to veiw of kiln head, and cylinder pressure tight seal;
♦ A slow drive device.
Cement Rotary Kiln Processes
With the arrival of rotary kilns, cement manufacturing processes became sharply defined according to the form in which the raw materials are fed to the kiln. Raw materials were either ground with addition of water, to form a slurry containing typically 30-45% water, or they were ground dry, to form a powder or “raw meal”.
- In the Wet Process, the kiln system is fed with liquid slurry, the water then being evaporated in the kiln.
- In the Semi-Wet Process, raw material is prepared as a slurry, but a substantial proportion (50-80%) of the water is mechanically removed, usually by filtration, and the resulting “filter cake” is fed to the kiln system.
- In the Dry Process, the kiln system is fed with dry raw meal powder.
- In the Semi-Dry Process, a limited amount of water (10-15%) is added to dry raw meal so that it can be nodulised, and the damp nodules are fed to the kiln system.
Wet process cement rotary kilns
The original rotary cement kilns were called ‘wet process’ kilns. In their basic form they were relatively simple compared with modern developments. The raw meal was supplied at ambient temperature in the form of a slurry.
A wet process kiln may be up to 200m long and 6m in diameter. It has to be long because a lot of water has to be evaporated and the process of heat transfer is not very efficient.
The slurry may contain about 40% water. This takes a lot of energy to evaporate and various developments of the wet process were aimed at reducing the water content of the raw meal. An example of this is the ‘filter press’ (imagine a musical accordion 10-20 metres long and several metres across) – such adaptions were described as ‘semi-wet’ processes.
Through the technical renovations, the rotary kiln calcining system equipment made by ZK has adopted the advanced hydraulic thrust roller device, the high measuring precession plunger pump, the variable speed adjusted valve, the contact graphite block sealing device and the other national advanced technologies. In order to raise up automation degree, the industrial TV has been used at the kiln head for monitoring of kiln, the simulation phosphor screen has been used for display of process flow; the infrared scHangZhou system has been adopted for calcining zone to directly reflect the burning conditions on the computer. With the use of these new of these new technologies, it is direct in vision, convenient in operation and reliable in use. Therefore, the thermal condition can be stabilized and the running rate of equipment can be raised. Compared to same sized equipment, its running rate has been raised 10% up, production has been increased 5% to 10% and heat consumption has been reduced 15% down.
Our company produces other rotary kilns with the diameter1-5 meters, widely applies in the metallurgy, the chemical industry, bears professions and so on material, Ceram site, papermaking. This kind of kiln’s supporting is divided into two forms of rolls and skids, the transmission may use direct-current or the exchange frequency conversion velocity modulation, and has many kinds of form seals to adapt the different operating mode.
Cement roatry kiln’s specification:
|spec (m)||technical parametere||speed reducer||motor||supporting quantity|
|rev (r/min)||slope (%)||output (t/h)||type||type||power (KW)|
ZheJiang HangZhou Mining Machinery Co., Ltd is located in Xihu (West Lake) Dis. Industrial Park of HangZhou HangZhou which is the capital of ZheJiang Province. It is at the junction of 310 State Road and Xingmi Road, close to the highway, railway station, West Zhong EPT Road, downtown area of HangZhou and HangZhou International Airport. The transportation condition is very convenient. The main products of company include: ball mill, rotary kiln, vertical preheater, cooler, crusher, metallurgical coke oven, magnetic separator, flotation machine, classifier, feeder, bucket elevator, preheater, dust collector, elevator, drier, and other equipments relate to metallurgy, cement, lime, mineral processing, refractory, chemical industry. The products of ZheJiang HangZhou Mining Machinery Co., Ltd have been sold to every province of China and exported to Russia, Korea, Vietnam, Malaysia, Nepal, Bangladesh, Mexico, Armenia, Africa, South America and other countries and regions.
In order to save your time ,can you tell me the following time below before send us the inquiry so that we can give you a more suitable quotation and improve our efficiency .
1. What’s material is to be calcined?
2. What the capacity do you need?
3. What’s the fuel is for calcining?
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