Rotary furnaces are composed of several key components, including the furnace body, furnace lining, drive gear, and internal heat source.
4 Key Parts Explained for Non-Professionals
Furnace Body
The furnace body is typically a cylindrical structure made from steel plates.
These plates are welded together to form a barrel shape.
The dimensions of the furnace body can vary significantly.
They range from 30 to 60 feet in length and 3 to 6 feet in diameter, depending on the specific application.
The body is designed to rotate on rollers, which are often made of stainless steel.
It can be mounted at a slight angle to the horizontal.
This design facilitates the movement of materials inside the furnace during processing.
Furnace Lining
Inside the furnace body, there is a lining made of heat-resistant insulation bricks and refractory materials.
This lining is crucial for maintaining the high temperatures required for various processes.
It also protects the steel shell from the intense heat.
The lining can be designed in various ways, such as cellular structures, to enhance heat transfer efficiency.
Drive Gear
The drive gear is responsible for rotating the furnace body.
It typically includes an electric motor, a reduction gear, and a toothed transmission.
The rotation speed is usually low, around 1-2 rpm, which helps in uniformly processing the materials inside the furnace.
Internal Heat Source
The heat source in a rotary furnace can be direct or indirect, depending on the design.
Direct heating involves burning fuel directly inside the furnace.
Indirect heating uses a muffle to separate the fuel combustion from the material being processed.
The fuel can be in various forms, including pulverized, solid, liquid, or gaseous.
Burners are strategically placed to ensure efficient heating and are often located at the charging end of the furnace.
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