How To Launch A Lime Rotary Kiln

It’s very important about the starting of a lime rotary kiln. Whether there is a reasonable launch directly decides the later running state of rotary kiln.

First, rotary kiln running under the lowest speed

• 

• 

When the kiln tail’s temperature is about 550℃, rotary kiln keeps running at its lowest speed. When flame eruptivity reaches a steady-state in kiln nozzle, the air blower of cooler started. Air volume should according to the two time needed combustion volume, then the air volume gradually increased. After kiln tail’s temperature reaches 600-700℃, operators in kiln head start to put materials inside the kiln. The preheater and exhaust fan start at the same time, so the auxiliary chimney valve should be closed. When materials reach kiln’s turning point, you need to slowly adds materials and make a burning point to 1400℃, kiln tail temperature reaches 850 ℃. You can’t always depend on the measuring equipment, better directly watching, at the same time, care for the scorification phenomenon the adjust the transmission volume of the flue.

Second, rotary kiln running steadily

As the flue adds, the air volume through ventilation and cooler should match the flue volume. The air volume on flowmeter is just a rough standard when rotary kiln runs steadily, you should immediately analyze kiln tail gas and adjust to reasonable air volume. The preliminary productions are always underburned because inhale flue volume is less in case that high temperature will burn down refractory bricks. So. When materials reach a burning point, you should slow down rotary kiln’s rotating speed or add a little bit flue. As the decomposition degree increases, put rotary kiln on its normal speed. When lime enters cooler from rotary kiln, cooler start to exhaust. The layer thickness of lime and the rotating speed of cooler should stay specific. The air volume of the cooling fan is sufficient as long as it can meet the amount of secondary air required for combustion and the needs of cooling products, which is conducive to increasing the temperature of the secondary air. The product quality can gradually increase the fuel input and output, the preheater discharge, and the kiln burnout in a good stable state. At this time, first, increase the input and output, and follow the preheater outlet gas temperature that will rise accordingly. Keeping it constant is required. Increasing the discharge speed of the preheater, the substantial increase in fuel input and output is related to the substantial increase in the amount of raw material. This often disturbs the calcination state. Therefore, the primary fuel increase is limited to 0.3KL / h. After the calcination condition is observed for 3-4 hours, it is further increased.