Device for baking high-activity magnesium oxide

Abstract

The invention provides a device for baking high-activity magnesium oxide. The device comprises a waste heat boiler, a calcining furnace and a dust collector. A feed port of the calcining furnace is connected with a discharge port of a second cyclone separator through a feed pipe; a discharge port of the calcining furnace is connected with a feed port of a third cyclone separator through a discharge pipe; a discharge port of the third cyclone separator is connected with a feed port of a fourth cyclone separator through a material pipe; an air outlet of a second fluidized bed is connected with an air inlet of a sixth cyclone separator through a ventilation pipe; air outlets of the sixth cyclone separator and the waste heat boiler are respectively connected with an air inlet of the dust collector through ventilation pipes; and an air outlet of the dust collector is connected with a chimney through a first induced draft fan, and discharging ports of a first fluidized bed, a second fluidized bed, the sixth cyclone separator and the dust collector are all connected with a discharging pipe through material pipes, so that blockage can be avoided; and the product activity is high, environmental protection is achieved, energy is saved, and the operation cost is reduced.

Description

technical field [0001] The invention relates to the technical field of magnesium oxide production equipment, in particular to a device for firing high-activity magnesium oxide. Background technique [0002] There are very few good-grade magnesites with a magnesium oxide (MgO) content of more than 46.5% in my country. A large number of low-grade ores and crushed magnesite need to be fully utilized. [0003] At present, the commonly used traditional equipment for the production of high-activity magnesia in my country includes light-fired shaft kilns, rotary kilns, fluidized fluidized kilns, suspension roasters, multi-layer roasters, and reverberatory kilns, all of which have requirements for the structure of calcined minerals, and the sieved powder The shape cannot be reused in the kiln, which wastes resources. The calcination time of uneven lumps and small particles entering the kiln is not properly controlled, and it is prone to under-burning or over-burning. The process dus...

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used traditional equipment for the production of high-activity magnesia in my country includes light-fired shaft kilns, rotary kilns, fluidized fluidized kilns, suspension roasters, multi-layer roasters, and reverberatory kilns, all of which have requirements for the structure of calcined minerals, and the sieved powder The shape cannot be re-used in the kiln, which wastes resources. The calcination time of uneven lumps and small particles entering the kiln is not properly controlled, and it is prone to under-burning or over-burning. The process dust leaks and pollutes the environment. The hydration activity is unstable. Fine grinding and grading, the follow-up process is prone to moisture absorption and secondary pollution, and the product has poor activity; it seriously damages the environment, and it is difficult to meet the requirements of environmental protection, energy saving and emission reduction, and lower operating costs.

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