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Device and process method for preparing light calcined magnesia by suspension calcination

A kind of light burning magnesia, suspension calcining technology

Active Publication Date: 2020-10-09
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The invention provides a complete set of equipment and a process method for preparing light-burned magnesia by suspension calcination, the purpose of which is to solve the problems of poor recovery of waste heat and uneven product quality existing in existing light-burned magnesia calcination equipment

Method used

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  • Device and process method for preparing light calcined magnesia by suspension calcination
  • Device and process method for preparing light calcined magnesia by suspension calcination
  • Device and process method for preparing light calcined magnesia by suspension calcination

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Embodiment 1

[0090] The feeding port of the raw material bin 1 is connected with the feeding port of the flash dryer 2 through the conveying equipment (existing screw feeder and other equipment with conveying function); the air inlet of the flash dryer 2 is connected with the secondary preheating cyclone 5 The gas outlet Ⅲ5-1 of the flash dryer 2 is connected, and the gas outlet Ⅰ2-1 of the flash dryer 2 is connected with the gas inlet Ⅰ3-1 of the first-stage preheating cyclone 3; the gas outlet Ⅰ3-2 of the first-stage preheating cyclone 3 It communicates with the gas inlet Ⅰ 4-1 of the bag filter 4, and the material outlet Ⅰ 3-3 of the primary preheating cyclone 3 is connected with the gas material inlet Ⅱ 5-2 of the secondary preheating cyclone 5; the gas outlet Ⅱ 4-2 of the bag filter 4 It is connected with the gas inlet II17-1 of the waste gas treatment device 17, and the material outlet II4-3 of the bag filter 4 is connected with the gas material inlet I3-1 of the primary preheating cy...

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Abstract

The invention relates to a device and a process method for preparing light calcined magnesia through suspension calcination. The device comprises a raw material bin, a flash dryer, a raw material multistage preheating device, a suspension calcinator, a waste gas treatment device, a gas-material separation device, a product heat recovery device and a smoke exhaust device. The process method for preparing light calcined magnesia through suspension calcination comprises the steps that magnesite powder is dried; multi-stage preheating is conducted after the magnesite powder is dried; the preheatedmagnesite powder is calcined and subjected to heat preservation; and the material subjected to heat preservation enters a product heat recovery device to be cooled. The problems that existing light calcined magnesia calcining equipment is poor in waste heat recycling rate and uneven in product quality are solved, and energy consumption of the suspension calcining furnace can be remarkably reduced.

Description

technical field [0001] The invention relates to the production technology of light-burned magnesia, in particular to a complete set of equipment and a process method for producing light-burned magnesia by suspending calcined magnesite powder which realizes the utilization of flue gas and product waste heat. Background technique [0002] The main component of magnesite is magnesium carbonate, which is the most important magnesium-containing ore. my country is rich in magnesite resources, with a proven resource volume of 3.642 billion tons, accounting for 28.85% of the global total. It has the characteristics of concentrated resource distribution. Although my country is a country rich in magnesite resources, due to years of blind mining and extensive production methods, high-grade ore is increasingly scarce, product quality is unstable, production efficiency is low, and product added value is low. [0003] Light-burned magnesia is one of the main products of calcined magnesit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B2/10
CPCC04B2/102
Inventor 王德喜董辉张继宇
Owner SHENYANG POLYTECHNIC UNIV
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