Light burning system and method of magnesite

Abstract

The invention relates to a light burning system of magnesite, particularly to a magnesite light burning system and a light burning method in the refractory industry. The magnesite light burning system comprises an ore crushing and grinding system which sends ores into a calcinator system through material-charging and conveying equipment. The calcinator system, connected to a fuel supply system, outputs lightly-burnt magnesia powders by material-discharging and conveying equipment. The system of the invention has the advantages of: low heat consumption, with 44%-56% energy saved compared with a reverberatory furnace; great capacity of production; lower dust concentration of less than or equal to 50mg / Nm3 in exhaust emissions, about 90%-95% lower than the dust concentration of a reverberatory furnace; good quality of products; low labor intensity; high labor productivity which is more than 49 times of the productivity of a reverberatory furnace; high utilization of magnesite, for a reverberatory furnace only being capable of lightly burning lump ore materials, but a gaseous suspension calcinator, a fluidized flash calcinator or a circulating calcinatory being able to lightly burn fine ore materials.

Description

technical field [0001] The invention relates to a light burning system of magnesite ore, in particular to a light burning system and a light burning method of magnesite in the refractory material industry. Background technique [0002] In order to produce high-grade magnesia refractory materials using magnesite as raw material in the refractory industry, it is necessary to lightly burn magnesite at 950-1050°C to obtain highly active lightly burned magnesium powder, and then produce it after further processing. All kinds of high-grade magnesia refractories. So far, the light burning of magnesite mainly adopts reverberatory furnace light burning process and equipment. Also tried to adopt other light burning process and device, but without success. When the reverberatory furnace is used as the device for light-burning magnesite, the heat consumption is as high as 7.40-8.54GJ / t-MgO, and the quality of light-burning MgO powder is unstable, and the dust concentration in the exha...

AI Technical Summary

Problems solved by technology

When the reverberatory furnace is used as the device for light-burning magnesite, the heat consumption is as high as 7.40-8.54GJ / t-MgO, and the quality of light-burning MgO powder is unstable, and the dust concentration in the exhaust gas is higher than 500mg / Nm 3 , even up to 1000mg / Nm 3 Above, the labor productivity is only 1100t / person·year, and the degree of automation is low, which is a very backward light burning system and method

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