Roast System of Gas Rotary Calciner

Preheater, rotary calciner, cooler is the main equipments for the production of lime in our company, and it is the heart of the whole process of production. Their maintenance is very important, especially the internal refractory material which is the protective layer inside the equipment, so rotary calciner must be baked before being put into normal production.
Roast steps:
1 Before roast, the flue system and all kinds of pipes must be cleaned to remove all clogging and debris.
2 Make roast procedures, roast temperature curve and record form according to the specific circumstances of rotary calciner, and strictly perform and record.
3 Equipped with baking personnel to learn roast requirements and operating procedures.
4 Prepare fuel and equipment for roast.
5 The chimney is made to have a certain temperature, so as to form a negative pressure in the flue.
6 According to the temperature curve to roast rotary calciner masonry.
7 Ensure the production line equipment idle running well, especially the combustion system and rotary kiln system.
Roast process:
1 Using natural gas to roast: First, using steam or compressed air to purge gas pipeline, Natural gas pipelines should be carried out after elution, then take samples to carry on detonation test or gas analysis, only when rear is qualified can we open the valve of the ignition burner to avoid deflagration accident. Open kiln fan before the ignition, on the kiln ventilation 10-30 minutes, the calciner need to ventilate 10-30 minutes to exclude the the ignition gas exists in the kiln.
2 Check the temperature control instrument to ensure their integrity, timely determine various parts temperature in the calciner to make it identical with the specified calciner temperature. Control heating speed and holding time by changing the amount of fuel used and the pressure in the furnace, if the roast temperature is much lower than the specified temperature, we should immediately slow heating up, do not allow a substantial increase in temperature. If theroast temperature is much higher than the specified temperature, heat preservation is need immediately, do not allow to take measures to cool.
3 Furnace lining must be continuously carried out until the completion and it shall not be interrupted. Before roast, relevant equipment must be on the test run, and ensure that power outage does not occur during the roast process. In case of failure due to the forced factors to stop roast, we should immediately shut down the control flue valve or drop the flue gate and take effective measures to minimize the temperature of roast.
4 Take records on time in the process of bake and heating, pay close attention to the masonry structures, that the moisture content is too late to escape, the heating is not uniform, the volume expansion too fast and so on can cause deformation and damage.
Roast is very important for gas rotary calciner, the knowledge above can help us improve the working efficiency, if you have any doubt, you can contact us!