ROTARY KILN WORKING PRINCIPLES & FUNCTION

Who invented the rotary kiln?

• Frederick Ransom

• Alexander Graham Bell

• Thomas Edison

• Marie Curie

What are the basic components of a rotary kiln?

• Aluminum, Steel, Copper, Iron

• Concrete, Bricks, Tiles, Cement

• Glass, Plastic, Wood, Metal

• Shell, Refractory Lining, Support Tyres, Drive Gears

What is the purpose of the drying zone in a cement rotary kiln?

• To evaporate moisture from the raw material

• To cool down the clinker

• To grind the clinker

• To mix the raw materials

What is the temperature range in the burning zone of a cement rotary kiln?

• 800 to 1000 degrees Celsius

• 500 to 700 degrees Celsius

• 1600 to 1800 degrees Celsius

• 1300 to 1450 degrees Celsius

What are the main compounds in Portland cement?

• Carbon Dioxide, Hydrogen Peroxide, Nitric Acid, Sulfuric Acid

• Aluminum Oxide, Silicon Dioxide, Magnesium Sulfate, Zinc Oxide

• Sodium Chloride, Potassium Nitrate, Calcium Carbonate, Iron Oxide

• Tricalcium Silicate, Dicalcium Silicate, Tricalcium Aluminate, Tetracalcium Aluminoferrite

What is the purpose of a rotary kiln in the building material industry?

• To stabilize the size and increase the strength of raw materials

• To transport materials

• To produce electricity

• To extract minerals from the ground

What is the advantage of a rotary kiln in handling waste?

• Intermittent mixing of incoming waste

• Low operating temperature

• Inability to handle waste

• Ability to handle a variety of waste

What is the disadvantage of a rotary kiln in terms of cost?

• Low capital and operating cost

• Low waste handling capacity

• High capital and operating cost

• No need for trained personnel

What is the purpose of the preheating zone in a cement rotary kiln?

• To cool down the clinker

• To mix the raw materials

• To prepare for the decomposition of calcium carbonate

• To grind the raw materials

What is the temperature range in the exothermic reaction zone of a cement rotary kiln?

• 800 to 1000 degrees Celsius

• 1000 to 1300 degrees Celsius

• 500 to 700 degrees Celsius

• 1400 to 1600 degrees Celsius