The influence of combustion and fuel nozzles on refractory bricks: When coal is used as fuel,Refractory Bricks the volatile matter and ash content of coal play a decisive role and directly affect the shape of the flame. The pulverized coal with higher volatile content and lower ash content can shorten the black fire head and form a low temperature long flame calcination. It is generally beneficial to protect the kiln lining, but the volatile content is too high,Refractory Bricks and the fire is too fast. The temperature of the clinker out of the kiln is as high as 260℃ and the secondary air temperature exceeds 900℃. It is easy to burn the nozzle, causing it to deform or burn. A gap appeared,Refractory Bricks creating a turbulent flame shape that damaged the kiln lining before it was replaced. If the volatile content of coal is too low (less than 0%) and the ash content is too high (greater than 28%),Refractory Bricks the incomplete combustion of a large amount of pulverized coal will settle and burn in the material and release a lot of heat and damage the kiln skin.
Fuel nozzle structure is often not paid enough attention in production. The shape and outlet size of the nozzle mainly affect the mixing degree and ejection speed of the pulverized coal with the primary air. Sometimes to enhance the mixing of air and coal,Refractory Bricks wind fins can also be installed in the nozzle. But pay attention to the excessive rotation of the swirling wind to scratch the kiln skin.
The influence of raw material composition fluctuation on refractory bricks: when the aluminum ratio is too high and the liquid phase viscosity is large, the kiln skin will collapse in a large amount,Refractory Bricks which is not easy to control in operation and is unfavorable for protecting the kiln lining. In production practice,Refractory Bricks the aluminum ratio is generally controlled at 1.3~1.6 ; When high saturation ratio, high silicon content,Refractory Bricks low liquid phase ingredients are used, it is easy to produce viscous material erosion and abrasion of the kiln skin,Refractory Bricks which will damage the kiln lining when the kiln is thin. In production practice, when the silicon is 2.5, the saturation ratio should not exceed 0.92. When the silicon ratio is 2.8,Refractory Bricks the saturation ratio should not exceed 0.90.
