You asked a very good question about this you should know the concept of Burnability factor and there is one graph between free CaO and temperature.As per graph if you increase the temperature then automatically its reduces the free lime content even you can check the Burnability test in QC lab by doing different different temperatures (1400,1450 and 1500 ) in oven. Burnability factor should be less than 120 Kindly go through below link for more details www.cementindusneed.com/clinkerization/
Flame momentum is the function of volatile matter in the fuel... generally with fuel having low VM needs high flame momentum further the advantage of high flame momentum decreases the tendency of CO formation that ultimately minimizes the condition of reducing the atmosphere inside the kiln .The Volatile cycle is directly proportional to reducing atmosphere of the kiln therefore we have to maintain oxidising conditions inside the kiln, furthermore ,definitely high flame momentum reduce the volatile cycle up to certain extent.
@sk coating generally forms in the transition zone due to reducing the condition of the kiln . (M)nSO4- SO2 +1/2 O2+(M)nO As per above reaction we want sulphur in the SO4 state but in reducing condition the equilibrium will shift towards right as a result more SO2 will be formed as a result it act as active reactant which reacts with intermediates of the transition zone to form sulphur spurrite ring. Therefore in the burning zone the sulphur evaporation should be minimised so that it can not react with transition zone intermediates. In the burning zone try to dilute all these sulphur with alkalies K2SO4 and Na2SO4.
Good information ji sir tq so much for giving this information
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Sir apne kaha ki lsf badjane se Burning zone temp bad jata hai pl. Explain
You asked a very good question about this you should know the concept of Burnability factor and there is one graph between free CaO and temperature.As per graph if you increase the temperature then automatically its reduces the free lime content even you can check the Burnability test in QC lab by doing different different temperatures (1400,1450 and 1500 ) in oven.
Burnability factor should be less than 120
Kindly go through below link for more details
www.cementindusneed.com/clinkerization/
Sir ,Can increase in flame momentum/ burner capacity decrease the So3 or volatile recirculation inside kiln?
Flame momentum is the function of volatile matter in the fuel... generally with fuel having low VM needs high flame momentum further the advantage of high flame momentum decreases the tendency of CO formation that ultimately minimizes the condition of reducing the atmosphere inside the kiln .The Volatile cycle is directly proportional to reducing atmosphere of the kiln therefore we have to maintain oxidising conditions inside the kiln, furthermore ,definitely high flame momentum reduce the volatile cycle up to certain extent.
Sir due to sulphur, sulphur spurrite ring formed,it means it is evaporated in the burning zone and make coating in the transition zone?
@sk coating generally forms in the transition zone due to reducing the condition of the kiln .
(M)nSO4- SO2 +1/2 O2+(M)nO
As per above reaction we want sulphur in the SO4 state but in reducing condition the equilibrium will shift towards right as a result more SO2 will be formed as a result it act as active reactant which reacts with intermediates of the transition zone to form sulphur spurrite ring.
Therefore in the burning zone the sulphur evaporation should be minimised so that it can not react with transition zone intermediates.
In the burning zone try to dilute all these sulphur with alkalies K2SO4 and Na2SO4.