Continuous production method of undercalcined magnesia kiln

Abstract

The invention relates to the field of vertical undercalcined magnesia kiln production, in particular to a continuous production method of an undercalcined magnesia kiln. The continuous production method of the undercalcined magnesia kiln is characterized in that a coal gas storage tank is arranged between the kiln and a coal gas generator and the volume of the coal gas storage tank is required to be not less than the coal gas consumption of the kiln at the period of adding coal; and a tunnel burner is arranged in the kiln, materials are burned on the two sides of the burner, discharging passages are respectively arranged between the two sides of the burner and the inner wall of the kiln, the calcined materials automatically slide down from the discharging passages, continuous automatic discharging machines are arranged at the outlets of the discharging passages and therefore continuous production is realized. Compared with the prior art, the continuous production method of the undercalcined magnesia kiln has the beneficial effects: 1) the continuous production of the undercalcined magnesia kiln is realized, and while the product quality and the production efficiency are greatly improved, the energy utilization ratio is improved; 2) vertical heating and calcination are realized, the materials are burned more fully and the emission of gas pollutants is reduced; and 3) the labor intensity is reduced and the calcination time is stably controlled by controlling the discharging speed.

Description

technical field [0001] The invention relates to the production field of a vertical light-burned magnesia kiln, in particular to a continuous production method of a light-burned magnesia kiln. Background technique [0002] At present, the production process of the vertical light-fired magnesia kiln is mainly based on the intermittent production mode due to the limitation of gas supply, heating method and discharge method, which not only has high labor intensity and low production efficiency, but also has insufficient heat utilization, Incomplete combustion, unstable product quality and other shortcomings, CO 2 , SO 2 , NO X Emissions of pollutants have remained high. [0003] The existing gas supply is intermittent. Each kiln is equipped with a small gas generator, and the gas produced by the gas generator is directly transported to the kiln. When the coal in the gas generator is consumed to a certain amount, coal needs to be added to the furnace. At this time, the gas ou...

AI Technical Summary

Problems solved by technology

In general, the temperature of the firing zone will drop by 700-800°C under the combined action of stopping heating and material replacement during the discharge process. The kiln can continue to operate normally only after re-igniting to raise the temperature of the firing zone to the required temperature. It takes more than 60 minutes, which seriously affects the production efficiency of the kiln; in addition, due to the large temperature fluctuation in the furnace, it will also reduce the service life of the refractory lining and furnace bars

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