Rotational kiln is a cylinder calcination equipment, also known as rotary kiln, after increasing its speed, the production and quality of clinker has been greatly improved, and some other problems have also been a very good solution.

First, the influence on the clinker production and quality

The output of clinker is between 880--920 ton / day before rotary kiln speed increase, but 1000—1020 ton / day after speed increasing.

Clinker strength has been greatly improved, and grindability has also been improved, so each cement mill production from 38 ton/ hour to 40 ton/hour.

Second, the influence on the flame and kiln skin

The rotary kilner is the technical transformation kiln, with large diameter ratio, so the resistance of the kiln air flow is larger than the average kiln, and kiln pressure of about -200Pa. After increasing the kiln speed, the fill rate of the kiln material from 13.75% to 10.70%, to enhance ventilation. With the increase of production, secondary air temperature improves from 1000 degrees centigrade to 1100 degrees centigrade, to strengthen the coal Of the combustion. The primary air consumption reduces from 12% to 9%, and the flame is easy to control and transfer gear, so ensure the protection of kiln skin and kiln brick.

Third, the influence on energy consumption

The standard coal consumption of clinker reduces from 154kg / ton down to 135kg / ton, and power consumption of clinker burning drops from 564kwh / ton down to 49kwh / ton.

Fourth, the influence on ring formation

Before increasing rotary kiln speed, there is the situation that stop kiln many times due to ring formation. After increasing rotary kiln speed, operate with a thin layer and adjust the flame shape to avoid incomplete combustion of fuel. So far, there is no ring formation in the production.

Fifth, the influence on the fuel material

To deal with ring formation before speeding, the ingredients increased KH (carbonate hardness from 0.88 to 0.93), and adopting high-grade limestone, high-silica sandstone, fly ash, steel slag 4 ingredients and low sulfur fuel. After speeding, it has been applied that low-grade limestone, ordinary sandstone and shale, and slag, calcium slag and other industrial waste are also in the application of ingredients.