Wet And Dry Process Cement Rotary Kiln in Cement Plant , Cement Kiln 55kw

Wet And Dry Process Cement Rotary Kiln in Cement Plant , Cement Kiln 55kw

Cement Rotary Kiln Process Wet and Dry Cement Rotary Kiln

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 Wet and Dry Cement Rotary Kiln

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.

The wet process has survived for over a century because many raw materials are suited to blending as a slurry. Also, for many years, it was technically difficult to get dry powders to blend adequately.
Dry process cement rotary kilns Wet and Dry Cement Rotary Kiln

In a modern works, the blended raw material enters the kiln via the pre-heater tower. Here, hot gases from the kiln, and probably the cooled clinker at the far end of the kiln, are used to heat the raw meal. As a result, the raw meal is already hot before it enters the kiln.

The dry process is much more thermally efficient than the wet process.

Technical Parameters:

Case:

    Lipu Heavy Industry Co., Ltd, headquartered in Pudong New District, Shanghai, is composed of Shanghai

Lipu Heavy Industry Co., Ltd and Jiangsu Lipu Heavy Industry Co., Ltd., which is a famous company

specialized in designing and manufacturing ore dressing machinery, crushing and drying equipment. Thanks

to our profession and rich experience, we become well known for supplying complete mineral processing

plants at 100-5000tons per day processing capacity and providing turnkey project service. We have

established long-lasting cooperation with many research institutions at home; we can do mineral beneficiation

experiment and design complete ore-dressing plant and non-standard equipment according to clients’

requirements.  We supply one-stop service for our customers: From the designing of the technological plans,

equipment manufacturing, installation, commissioning and operation.

    We have cultivated a professional technology and after-sales service team, and successfully achieved

ISO9001：2008 Quality Management Certificate and EU CE Certificate, and Russia GOST Certificate, etc.,

our products are well-known both in China and foreign countries, which have been exported to more than 60

countries, including Canada, Australia, Russia, Central Asia, Middle East, South America, Southeast Asia,

Northeast Asia, Africa, etc.

    We have well experienced technical team in our Technical Department and R&D Department with more than

30 technicians (5 senior engineers and more than 20 technicians).  In our factory, we have 200 sets of various

processing equipment, including complete inspection equipment, and the total hoisting tonnage is above 500

tons.  We guarantee product quality based on mature processing technic.  Since we have established long-

lasting relationship with forging company and logistic company, we can assure you quality products and timely

transportation.

    We devote ourselves to providing trustworthy product and value-added service for global customers and to

creating value for customers, which are the unanimous goal of all the Lipu employees. Under the guidance of

united, pragmatic, dedicated and innovative spirit of enterprise, we look forward to cooperating with you to

build a beautiful world and prosperous future together.