Introduction of the Vertical Preheater of Magnesium Production

A complete calcined dolomite system is composed of vertical preheater, rotary kiln, bag filter. That vertical preheater use waste gas of kiln tail can improve fuel system utilization, shorten the length of the rotary kiln, reduce the heat loss of the surface of the rotary kiln and the area, which can also effectively recover the exhaust emissions by taking away the heat and is also conducive to dust at the same time.
New vertical preheater use in metal magnesium production is composed of external cylindrical silo, internal cone, bin material chute, preheater steel silo stent, bottom transition section chute, preheater shell group, hydraulic push rod device, shell bottom feeding chute, preheater dedusting interface, ceiling device, maintenance platform.
Structure and performance characteristics
1 Upper material feeding system: mainly including the upper part of the material bin, feeding chute, hopper bracket, which can guarantee safe and closed when feed to preheater ontology, so that the outside cold air can not enter into preheater inside, and material feeding can achieve continuous or intermittent feeding with bar valve.
2 Ceiling device: mainly used to bear the weight of the hanging brick.
3 Preheater Ontology: it is the most important part to ensure the material preheating to 800℃, it is composed of a preheating chamber, a suspension device and refractory lining (this does not belong to the scope of design and manufacture of equipment) part. Most of this part structure is metal components and part of the material is selected heat resistant steel according to the needs, heat resistant steel can work under high temperature 1000~1100℃. Also the refractory lining structure is with novel design, good sealing performance, which can ensure that material in preheater can evenly be preheated to preheating temperature.
4 Pushing feeding system: mainly includes the pusher, lined with bracket, balance beam, a connecting rod, etc. Pusher is made of heat-resistant steel, which can withstand high temperatures, the various hydraulic push rod achieve sequentially pusher according to the automatic control procedures with the help of electric and hydraulic system.
5 Hydraulic system: mainly including the fuel tank, oil pump, motor, solenoid valve, hydraulic oil pipe, etc., The main role of the hydraulic system is to control the feeding device.
6 Lower charging room: mainly include feed hopper, a transport chute, etc. the main role is to put preheated material into rotary kiln calcination.
7 The material return system: includes collecting hopper, material return chute, recycle bin etc.
The advantages of using the vertical preheater: the use of kiln exhaust gas improves the system of fuel utilization. To shorten the length of the rotary kiln reduces the heat loss of the surface of the rotary kiln and the area. The heat that is taken away by tail gas is recovered effectively, and it is also beneficial to dust removal.