What are advantages of coal injection?
It significantly reduces fuel costs over time and delivers shorter pay back periods on the investment. Low investment costs A coal grinding and injection system also requires less initial investment compared to a coke battery installation. As a result, PCI systems can provide immediate savings on fuel costs.
Why is pulverized coal used in blast furnace?
An explanation for this is that as the combustibility of the coal is increased (increased volatile content and/or finer grind), there is greater combustion within the tuyere giving a greater volume of gases being injected into the raceway, leading to greater blast momentum.
What is PCI coal used for?
PCI coal means a coal used by steel makers for pulverized coal injection (PCI) into blast furnaces to use in combination with the coke used to produce steel.
What is the most important arguments for the injection of coal or natural gas in a blast furnace?
Blast furnace injection of coal will allow domestic integrated steel producers to maintain production while minimizing their dependence on coke. Direct coal injection into blast furnaces offers the promise of significantly improved steelmaking operations.
What is meant by pulverized coal?
Coal that has been crushed to a fine dust in a grinding mill. It is blown into the combustion zone of a furnace and burns very rapidly and efficiently.
How is coke different from coal?
Coal and Coke are both a type of fossil fuels. The difference between these two fuels is that coal is mostly carbon but coke contains mostly water and less than half the carbon content of coal.
What is the effect high coal injection rates in the blast furnace?
The injection of coal into the blast furnace has been shown to: 1) Increase the productivity of the blast furnace, i.e. the amount of hot metal produced per day by the blast furnace; 2) Reduce the consumption of the more expensive coking coals by replacing coke with cheaper soft coking or thermal coals; 3) Assist in …
Which is best quality of coal?
Anthracite
Anthracite: The highest rank of coal. It is a hard, brittle, and black lustrous coal, often referred to as hard coal, containing a high percentage of fixed carbon and a low percentage of volatile matter.
Is PCI coal thermal coal?
As combustibility was considered to be of importance, the coals used for PCI were thermal coals.
Can a blast furnace smelt clay?
blast furnace cannot smelt clay into bricks.
Why pulverization is done?
Purpose of pulverization Pulverization is being used not only for reducing particle size but also as an operation for developing new materials.
What is pulverized coal state the advantages of pulverized coal?
Advantages of pulverized coal It reduces time of raising temperature of steam. Combustion of pulverized coal can readily be adopted to automatic control. This system works successfully with or in combination with the gas and oil. Large amount of heat release is possible in this system compared to stoke firing system.