Sagar Cement Ltd. has entrusted Gebr. Pfeiffer with another order for a mill to grind granulated blast-furnace slag and granulated blast-furnace slag cements.
A new grinding plant for 160 tph of ground granulated blast-furnace slag is intended for the extension of the company’s Bayyavaram Village works, near Visakhapatnam, India.
Gebr. Pfeiffer will be supplying an MVR 5000 C-4 mill, equipped with a 4300 kW-drive and four grinding rollers with active redundancy. This means that all four grinding rollers are actively taking 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 two 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 grinding plant will be designed so that granulated blast-furnace slag can be ground to a fineness of 4500 cm2/g (acc. to Blaine), while composite cements, with varying proportions of granulated blast-furnace slag, flyash and gypsum, can be ground in various finesses.
While the core components of the mill – roller, tension system, grinding bowl and planetary gearbox – will be Pfeiffer-supply from Europe, the mill foundation parts, the housing and the integrated high-efficiency classifier of the type SLS 4750 BC will be provided by Gebr. Pfeiffer (India) Pvt. Ltd., Pfeiffer’s Noida-based subsidiary. They will also supply most of the equipment required to complete the grinding plant, including plant fan and hot gas generator. Fired with lump coal, it will supply the heat required for drying the moisture contained in the granulated blast-furnace slag.
Delivery is scheduled to be completed by the end of the year.