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Magnesia calcining boiling furnace rotary kiln method and apparatus

A technology for calcination of magnesia and rotary kiln, which is applied in the field of calcination of magnesia in fluidized fluidized furnace rotary kiln, can solve the problems of inability to calcine high-quality active magnesia and multiphase magnesia, single internal structure, poor coal adaptability, etc., and achieve low cost, Easy to operate and good adaptability

Inactive Publication Date: 2006-05-17
王全祥
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Problems solved by technology

[0002] The existing active magnesia calcination methods include reverberatory furnace, fluidized bed furnace direct combustion, suspension furnace and downstream rotary kiln, etc., but the heat supply method is mostly coal injection, oil injection or jet type, which has poor adaptability to coal, and the internal Single structure, low output, high energy consumption or high cost, and even high-quality activated magnesia and heterogeneous magnesia cannot be calcined

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  • Magnesia calcining boiling furnace rotary kiln method and apparatus
  • Magnesia calcining boiling furnace rotary kiln method and apparatus
  • Magnesia calcining boiling furnace rotary kiln method and apparatus

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Embodiment Construction

[0032]The method for calcining magnesium oxide in a fluidized fluidized furnace rotary kiln of the present invention is that mineral raw materials such as magnesite and gypsum are crushed by a jaw crusher, screened by a vibrating screen, crushed by a jaw crusher and homogenized by a multi-grid raw material homogenization bin. The material with a particle size of ≤30mm enters from the high end of the rotary kiln and discharges from the low end, and the hot flue gas generated by the coal-fired fluidized fluidized furnace enters from the low end and discharges from the high end of the rotary kiln. During this period, it experienced four kinds of thermal effects: conduction, convection, radiation and smoldering; the dust and flue gas discharged from the high-end rotary kiln are sent to the conveyor through the useful material and dust recovered by the dust collection equipment, and the flue gas discharged from the dust collection equipment is The fan and flue gas are exhausted from...

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Abstract

The present invention relates to magnesia calcining boiling furnace rotary kiln method and apparatus. The magnesia calcining process includes feeding material from the high end of the rotary kiln, producing hot fume in the coal-burning boiling furnace, making the fume flow from the low end of the rotary kiln to the high end for counter flow type heat exchange with material inside the rotary kiln, exhausting fume and dust in the high end of the rotary kiln and recovering useful dust material, producing chamotte in sealed bin via high temperature radiation heating, and tempering the over burnt material. The apparatus consists of boiling furnace system for producing and supplying hot fume, calcining rotary kiln system, material feeding system, dust collecting system, and chamotte conveying, storing, ageing and cooling system. The present invention has the advantages of good coal adaptability, high heat efficiency, low cost, low power consumption, high yield, etc.

Description

technical field [0001] The invention relates to magnesium oxide calcining technology, in particular to a method and equipment for calcining magnesium oxide in a fluidized fluidized furnace rotary kiln. Background technique [0002] The existing active magnesia calcination methods include reverberatory furnace, fluidized bed furnace direct combustion, suspension furnace and downstream rotary kiln, etc., but the heat supply method is mostly coal injection, oil injection or jet type, which has poor adaptability to coal, and the internal The structure is single, the output is low, the energy consumption is high or the cost is high, and even high-quality active magnesium oxide and multiphase magnesium oxide cannot be calcined. Contents of the invention [0003] The purpose of the present invention is to provide a method for calcining magnesium oxide in a fluidized fluidized furnace rotary kiln with low cost, low energy consumption, high output, good adaptability to coal, and hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B2/10
Inventor 王全祥王华
Owner 王全祥
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