Pulverized Coal

• The concept of burning coal that has been pulverized into a fine powder stems from the belief that if the coal is made fine enough, it will burn almost as easily and efficiently as a gas. 
• The feeding rate of coal according to the boiler demand and the amount of air available for drying and transporting the pulverized coal fuel is controlled by computers.
• Pulverized coal injection was developed in 19th century, but was not implemented industrially until the 1970s. Rises in the cost of coke cost due to increased global demand and thus more competition for the resource have made this method attractive to the iron producing industries and increased its value.