Austria: Unitherm Cemcon has launched the MAS DT rotary kiln burner, a new product in its Mono Airduct System (MAS) product line. The new burner is already in operation at six cement plants in Austria, Germany and France.

The new design uses a more efficient primary air injection, resulting in higher effective momentum and optimised combustion. Placing the adjustable primary air openings directly at the burner tip leads to unobstructed injection of the air jets into the kiln. With minimum losses at the air nozzles, the entrainment of secondary air is improved by approximately 15%.

The new primary air system, with discs instead of flexible hoses, requires less space inside the primary air channel. Therefore, the burner is smaller in diameter and lighter in weight, which reduces investment costs. Unitherm Cemcon says that the cooling of the outer jacket tube with the MAS system (hose and disc design) is superior to that of other rotary kiln burners, as 100% of the primary air is used for cooling. With the new disc system, the cooling of the burner tip is improved even further. The producer added that all new MAS DT burners showed improved lifetime of the refractory lining at the burner. On average the refractory lifetime is extended by approximately 20%.