Internal passage type energy-saving and high-yield dead-burnt magnesia shaft kiln

Abstract

The invention relates to the technical field of shaft kilns, in particular to an internal passage type energy-saving and high-yield dead-burnt magnesia shaft kiln. The internal passage type energy-saving and high-yield dead-burnt magnesia shaft kiln comprises a material drying device, a shaft kiln preheating zone, a shaft kiln roasting zone, a shaft kiln cooling zone, a combustion system, an internal passage system and a material cooling device. An output port of the shaft kiln roasting zone is connected with an input port of the shaft kiln cooling zone, and an output port of the shaft kiln cooling zone is connected with an input port of the material cooling device. The internal passage system includes a passage and a support device, and gas outlets are formed in the upper part of the passage. The passage system is internally arranged at the shaft kiln preheating zone and the shaft kiln roasting zone. The internal passage type energy-saving and high-yield dead-burnt magnesia shaft kilnsolves the problem that an existing dead-burnt magnesia shaft kiln has low productivity and large energy consumption, and is suitable for calcination of magnesite.

Description

technical field [0001] The invention relates to the technical field of shaft kilns, in particular to an internal passage type energy-saving and high-yield dead-burned magnesia shaft kiln. Background technique [0002] Dead-burned magnesia is an important raw material for refractory materials, widely used in iron and steel metallurgy, building materials, non-ferrous metal smelting and other high-temperature industries, accounting for more than 40% of the entire magnesia refractory raw materials. However, the development of the industry is restricted due to poor production equipment, backward technology, high energy consumption and serious environmental pollution of dead-burned magnesia. The gas flow in the shaft kiln of dead-burned magnesia is the main factor restricting the large-scale structure of the shaft kiln. Due to the expansion of the size of the shaft kiln, there is a "central weak area" inside, that is, the roasting wind cannot penetrate the central material layer, ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of large-scale vertical kiln, large waste heat loss and increased energy consumption during the calcination process of dead-burned magnesia vertical kiln

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