We re-use the agricultural waste such as rice husk as biomass fuel, and burn the biomass in a furnace with controlled environment. The generated heat from the furnace is used to produce steam in a boiler and spins a steam turbine which drives an electrical generator. The saturated steam and electricity are used for the parboiling and rice milling processes. As a result, we produce tons of rice husk ash as byproduct after the rice husk is complete burn in the furnace.
Low carbon rice husk ash is widely used in steel production due to its unique characteristics such as high insulating power, free-flowing, nonhazardous powder and expandability. With the great thermal insulating, it can reduce the heat loss on the steel surface due to radiation.
While the molten metal in ladle/tundish at about 1600°C, the rice husk ash is being spread over molten metal. After that, it creates around 1″~2″ of thick layer over the molten metal to prevent heat loss during the process.