Efficient and environment-friendly tower-type co-combustion light-burned magnesia shaft kiln and production process of tower-type co-combustion light-burned magnesia shaft kiln

Abstract

The invention provides an efficient and environment-friendly tower type co-combustion light-burned magnesia shaft kiln and a production process of the tower-type co-combustion light-burned magnesia shaft kiln. The tower type co-combustion light-burned magnesia shaft kiln comprises a shaft kiln body, an outer combustion chamber, an inner combustion chamber, a tower type distributor, a flue gas tower type flow equalizer, a porous flue gas pipeline, an air mixing chamber, a cooling air tower type flow divider, a hot air pipeline, a combustion chamber flue gas pipeline, a flue gas exhaust pipeline, a feeding bin and a homogeneous settling chamber. Compared with the prior art, the beneficial effects of the tower type co-combustion light-burned magnesia shaft kiln are that: by arranging the twocombustion chambers, the heat exchange efficiency between materials and high-temperature flue gas is improved; on the premise that the product quality and yield are met, the energy consumption of thekiln is reduced, the energy utilization efficiency is improved, the environmental protection problem generated in the light burning process of non-metallic minerals is reduced, meanwhile, the materialstacking angle is combined, the tower structure is adopted, balanced stress is easily achieved, the balanced distribution effect on hot air, smoke and other gas is achieved, and the service life of the kiln is prolonged.

Description

technical field [0001] The invention belongs to the technical field of non-metallic ore sintering in a shaft kiln, and in particular relates to a high-efficiency and environment-friendly tower-type mixed-combustion light-burning magnesium shaft kiln and a production process thereof. Background technique [0002] my country is rich in magnesite resources, ranking first in the world. The proven magnesite reserves are 3.642 billion tons, accounting for 28.85% of the world's total reserves. my country's magnesite resources are mainly distributed in Liaoning and Shandong, especially The magnesite reserves in Dashiqiao and Haicheng areas of Liaoning are the most abundant. Generally, magnesite is lightly burned at 750-1100°C to obtain magnesia products. Lightly burned magnesia products are widely used in various industries, especially high-tech fine magnesia Products can be used in advanced lubricants, food industry and medical industry, etc. [0003] In the early days of our countr...

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Problems solved by technology

However, due to the small heat exchange area between the flue gas and the material, the flue gas will choose the flow channel with small material resistance to rise during the heat exchange process with the material, and the material may be heated unevenly and under-burn. Moving bed, lower end may be difficult to implement with bubbling fluidization techniques

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