Wonder Cement has switched to a Gebr. Pfeiffer vertical roller mill for cement grinding. Gebr. Pfeiffer has already supplied 4 MPS mills for raw material and petcoke grinding.
The customer has previously used combined grinding plants from another supplier for the grinding of cement. The lower specific energy consumption of the MVR mill, and the fact that it can be used for grinding and simultaneously drying moist feed materials, played a key role in the decision.
In India, there is a trend towards the use of stored flyash, instead of dry flyash from coal power plants, as a cement constituent. This type of flyash is stored in the open and so has a very high moisture content. This means that, if it is processed in a different grinding system from the MVR mill, it would have to be dried separately.
The customer’s engineering team called in HOLTEC, a consultant based in Gurgaon, close to New Delhi, which has good experience with Pfeiffer MVR mills. The mills are in operation in other Indian cement works, and this led the consultant to suggest changing the grinding system and switching to a Pfeiffer MVR mill.
Gebr. Pfeiffer SE, Kaiserslautern, will supply a mill of the type MVR 6000 C-6 with a 5280 kW drive that will be set up in Nardana, in the state of Maharashtra. It will produce mixed cements with finenesses of up to 5?%?R 45? µm.
The customer was particularly keen on being able to grind relatively hot clinker while simultaneously achieving a reduced temperature of the cement produced. The concept also offered the option of using cold clinker from stockpiles.
The offered MVR mill is equipped with six actively redundant grinding rollers. This means that all six grinding rollers take part in the grinding process. When it comes to scheduled maintenance works, two opposite grinding rollers can be swung out and the mill can continue production with the four remaining rollers.
Even in the case of an unplanned outage of one of the grinding rollers, the mill can continue in operation while the roller under service is being worked on outside the mill.
The core components of the mill, such as tension system and grinding rollers, will be supplied by Gebr. Pfeiffer, Germany. The grinding bowl and the gearboxes for mill and classifier will also be supplied from Europe.
The parts for housing and foundation, the supports for the grinding rollers and most of the parts of the integrated high-efficiency classifier of the type SLS 5600 BC will be provided by Gebr. Pfeiffer (India) Pvt. Ltd., Pfeiffer’s wholly-owned subsidiary in Noida.
It will also supply most of the equipment required to complete the grinding plant, including plant fan. For all components which will be procured by the customer, he will receive the corresponding specifications.
Delivery is scheduled to be completed before the end of the year.
Read the article online at: https://www.worldcement.com/indian-subcontinent/24042017/gebr-pfeiffer-to-supply-mvr-mill-to-h2-wonder-cement/