Integrated device for suspension flash preparation of high activity light calcined magnesia

Abstract

The invention discloses an integrated device for suspension flash preparation of high activity light calcined magnesia. The integrated device comprises a feeding machine, a Venturi mixer, a material multistage cyclone preheater, a suspension roaster, a gas material separation device and a material multistage cyclone cooler. The magnesite ore powder is fed into the Venturi mixer through the feeding machine, then enters the material multistage cyclone preheater and is subjected to step-by-step preheating, the final level of the preheated material is fed into the suspension roaster, is subjected to flash decomposition, is fed into the gas material separation device and is subjected to gas-material separation, the separated material is fed into the material multistage cyclone cooler and is subjected to step-by-step cooling, the final level of the cooled material is discharged, wherein an air flowing direction is opposite to that of the material, and the cooled waste gas from the material multistage cyclone preheater enters an exhaust-gas treatment device, is treated and then is discharged. The integrated device has a high integrated level, utilizes combination of flash roasting, gas material separation, waste heat utilization and exhaust-gas treatment, reduces labor intensity, improves a work environment and has high production efficiency.

Description

technical field [0001] The invention relates to the field of light-burned magnesia roasting kilns. Background technique [0002] Magnesite is an important national strategic resource. my country's magnesite reserves account for about 24% of the world's reserves, ranking first in the world. Although my country is a big country producing magnesite resources and magnesia materials, due to years of blind mining, high-grade magnesite ore is increasingly scarce, and the production of light-burned magnesia is still stuck in the original extensive production mode. The production enterprises have simple equipment and lack of technology. Standards, thermal systems and operating procedures are mainly manual operation based on experience, which is labor-intensive, serious environmental pollution, unstable product quality, low added value of products, and resources cannot be comprehensively utilized. The root cause of the problems in my country's magnesite industry is the backwardness o...

AI Technical Summary

Problems solved by technology

This kind of reverberatory kiln has a small body, low output, and an annual output of no more than 20,000 tons; open production, high energy consumption, and serious pollution; block materials, gas-material phase reverse movement, relying on hot air to bake materials, decomposition reaction speed Slow, the product is internally burnt and externally coke, the surface is over-roasted and loses activity, the internal roasting is not thorough and has no activity, the product activity is low, and the quality is poor; the degree of automation is low, the production is primitive, and the operation is based on experience, and the labor intensity is high.

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