PM&M manufactures Lightly Calcined Magnesite, also called as Caustic Calcined Magnesite in its Shaft Kiln Division having 5 numbers of Vertical Shaft Kilns. The installed capacity for Calcined Magnesite is 19,500 tonnes per annum. Raw Magnesite is calcined in Shaft Kiln using Furnace Oil as fuel at a temperature in the range of 1000 to 1100 degrees Celsius to produce chemically reactive grade, which is highly reactive in nature.

PM&M manufactures Dead Burnt Magnesite in its most advanced Rotary Kiln (Supplied and erected by M/s.F.L.Smith and Co., Denmark) with an installed capacity of 100 TPD and 30000 tonnes per annum commissioned during December 1985. The raw Magnesite (Refractory Grade) is sintered at a high temperature of 1750 degree Celsius using Furnace oil/ LSHS oil as fuel to produce Dead Burnt Magnesite.