It is designed for 100% natural gas operation. The gas is split into the main gas (95 – 98%), which is fed through the flexible hoses instead of primary air. The flame shape is adjusted directly with the fuel and not with the primary air, which is a unique feature worldwide. Low-pressure air is used for cooling purposes only. This design allows maximum flame control with a minimum consumption of air.

The M.A.S./SG burner is also equipped with a ‘thermo-carbolysator’, which is built into the burners central gas channel and is fueled by approximately 2% - 5% of the total gas flow. A separate air supply is used to maintain the stoichiometric gas-to-air ratio. The thermo-carbolysator accelerates the process of the gaseous fuel heating until the gas is mixed with the secondary air. It provides continuous combustion without flame detachment during the heating up phase. Due to staged combustion the burner improves the burning of bright materials such as white cement and lime.

In the first combustion stage the thermo-carbolysator mixes natural gas with low-pressure air inside the burner, ignites it and forms a flame with the root located inside the burner. It provides an exceptionally stable satellite flame, since the ignition point is not inside the kiln area, but inside the burner.

In the second combustion stage the main gas flow is heated by the satellite flame to over 1000°C under the shortage of oxygen near the burner nozzles. At such conditions the main flame starts to glow, thus the thermal radiation affecting the clinker intensifies.

World Cement Article March 2018 M.A.S./SG Asia Cement LCC Download