What is a rotary kiln used for?
A rotary kiln is a pyroprocessing device used to raise materials to a high temperature (calcination) in a continuous process. Materials produced using rotary kilns include: Cement.
What is rotary kiln temperature?
During the operation of the rotary kiln, flames can reach temperatures as high as 1900°C (3452°F) in order to heat raw materials to roughly 1500°C (2732°F). At the lower end of a kiln, the raw materials emerge as red-hot particles, called clinker.
What is the length of rotary kiln?
The dimensions of the first cement rotary kilns were approximately: 1.8-2.0 m in diameter, at a length of approximately 20- 25 m, with throughput capacities of about 30- 50 t/24 h.
What is rotary kiln incinerator?
Rotary kiln incinerators are cylindrical, refractory-lined steel shells supported by two or more steel trundles that ride on rollers, allowing the kiln to rotate on its horizontal axis. The refractory lining is resistant to corrosion from the acid gases generated during the incineration process.
How many types of kilns are there?
Before delving into specifics, it’s important to recognize that there are two basic types of kilns: continuous (tunnel) kilns and periodic (intermittent) kilns. Continuous kilns are always firing, so they never cool. The ware to be fired is loaded into cars and slowly goes through the kiln on a track or rail.
What industries use rotary kilns?
Industrial Rotary Kilns are primarily used in cement, lime, and iron ore processing. These furnaces use direct flame-fired heating methods to remove volatile compounds, instigate chemical reactions, and fuse powder into pellets.
What are the different types of kilns?
The three most common types of kilns are electric, gas and wood. Electric kilns are probably the most common type of kiln used in ceramics. They’re comparatively inexpensive, and small ones can plug directly into a 120-Volt wall socket, making them accessible to small pottery operations.
What are kilns used for?
Modern kilns are used in ceramics to fire clay and porcelain objects, in metallurgy for roasting iron ores, for burning lime and dolomite, and in making portland cement. They may be lined with firebrick or constructed entirely of heat-resistant alloys.
What is the minimum depth of landfill required?
What is the minimum depth of the landfill required? Explanation: Sites should be selected where the soil can be excavated to a minimum depth of 1.8 m.
How is heat provided in rotary kiln?
The main components of a rotary kiln are an inclined cylindrical, refractory-lined reaction shaft equipped to rotate over rollers and a burner. Process heat is generated by burning fine coke or coal contained in the charge and by the exothermic heat of the PbO reduction by CO.