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Method for preparing magnesium oxide through spray pyrolysis and spray pyrolysis furnace used therein

A technology of spray pyrolysis and magnesium oxide, applied in magnesium oxide and other directions, can solve the problems of unsatisfactory efficiency, high cost and large operating load.

Active Publication Date: 2017-04-12
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In summary, using traditional spray pyrolysis equipment to spray and pyrolyze bischofite to prepare magnesia has a large operating load, high cost, and unsatisfactory efficiency.

Method used

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  • Method for preparing magnesium oxide through spray pyrolysis and spray pyrolysis furnace used therein

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Embodiment 1

[0101] This embodiment includes a furnace body and an insulating layer made of refractory materials installed around the furnace body. The insulation layer is made of common asbestos material and stainless steel shell. figure 1 It is the structural representation of the furnace body in embodiment 1, comprising: rectangular tangential inlet (1), cylindrical rotating chamber (7), conical cyclone structure (4), conical bottom outlet (3), tail gas outlet pipe ( 2), a primary cylinder (5) and a secondary cylinder (6) coaxial with the cylindrical rotating chamber (7) connected to the tail gas outlet pipe (2), a cylindrical furnace chamber (8), Close furnace top (9), the liquid nozzle (optional position such as 10-12 etc. positions) and nozzle connecting pipe arranged on the axis of described cylindrical furnace chamber (8) and nozzle connecting pipe are formed by described cylindrical furnace chamber The side wall of (8) stretches in and is fixed by flange sealing.

[0102] In thi...

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Abstract

The invention provides a method and apparatus for preparing magnesium oxide through spray pyrolysis of a magnesium chloride solution. The apparatus comprises a cylindrical furnace chamber, a cylindrical rotation chamber arranged at the lower side of the cylindrical furnace chamber, a conical cyclone structure arranged below the cylindrical rotation chamber, a primary drum arranged in the center of the cylindrical rotation chamber and coaxial with the cylindrical rotation chamber and a secondary drum arranged in the primary drum and having a small diameter, wherein the cylindrical rotation chamber rotates under the action of tangentially-blown hot air; nozzles in the cylindrical furnace chamber spray the magnesium chloride solution for contact with hot air and a drying and pyrolysis reaction is carried out; and after sufficient drying and pyrolysis of the magnesium chloride solution, 90% or more than 90% of a solid magnesium chloride raw material is discharged from a cone-base discharge outlet (3) and then collected. According to the invention, miniaturization of a spray pyrolysis furnace is realized; reverse reactions are reduced; sufficient pyrolysis of materials is guaranteed; and gas-solid separation can be carried out in the furnace chamber, so subsequent separation operation is simplified.

Description

technical field [0001] The invention relates to the technical field of inorganic chemical industry, in particular to a spray pyrolysis furnace and a method for preparing magnesium oxide by spray pyrolysis. A device and method for magnesium oxide raw material. Background technique [0002] Magnesium products are widely used in the fields of national economy, environmental protection, functional materials and high technology, so their development and utilization have attracted widespread attention in the industry. On the other hand, my country is a country with many salt lakes, and the salt lake brine contains rich magnesium resources, and its bicholorite is the raw material for magnesium refining with the best quality and largest output in the world. Magnesium oxide is prepared by pyrolysis of bischofite, and the product has high purity and is environmentally friendly. In view of the current situation of salt lake resources utilization in China, the key to solving the compr...

Claims

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Application Information

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IPC IPC(8): C01F5/06
CPCC01F5/06
Inventor 路贵民杜玮孙泽于建国
Owner EAST CHINA UNIV OF SCI & TECH
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