Grouped lightly-calcined magnesium kiln heating process and device

Abstract

The invention relates to a grouped lightly-calcined magnesium kiln heating process and device. The process comprises the steps of preparing materials, feeding materials, feeding water, drying, destructively distilling, mixing and purifying gases, heating air and burning. The device comprises a coaling system, a water softening system, a coal generation furnace, an upper coal supplying system, a lower coal supplying system, a coal cleaning and burning system, a control system and an electric safety interlocking system. Compared with the prior art, the invention has the beneficial effects that the grouped lightly-calcined magnesium kiln heating process and device which can be used for converting low-cost abundant brown coal into high calorific value coal are provided, so that the brown coal is used for preparing two-section furnace heat decoking coal which can be used as a heat source for the calcination of caustic calcined magnesite. The process and device disclosed by the invention have the characteristics of high burning temperature, high coal cleanliness, high degree of automation and low pollution.

Description

technical field [0001] The invention relates to the technical field of light-burned magnesium, in particular to a heating process and device for group light-burned magnesium kilns. Background technique [0002] Light-burned magnesia, also known as light-burned magnesia, is calcined with magnesite, brucite and magnesium hydroxide extracted from seawater or brine to decompose and release CO 2 or H 2 The substance obtained after O, light-burned magnesium is an important part of magnesium product processing. When the calcination temperature is between 700°C and 1300°C, the higher the calcination temperature, the longer the holding time, and the more complete the decomposition of magnesite. The better the product quality. [0003] my country's magnesite is mainly concentrated in Liaoning. There are various types of magnesite calcining kilns in the local area, and there are a large number of them. Among them, light-burned magnesium kilns account for the largest proportion. At th...

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Problems solved by technology

[0003] my country's magnesite is mainly concentrated in Liaoning. There are various types of magnesite calcining kilns in the local area, and there are a large number of them. Among them, light-burned magnesium kilns account for the largest proportion. At this stage, the heat source generation equipment used in light-burned magnesium kilns is mainly semi-water gas. One-stage gas generators such as gas furnaces and small gas generators, these two types of equipment mainly have the following disadvantages: high-quality and high-priced coal raw materials must be used as coal for gasification, large energy waste, low combustion efficiency, unstable gas supply, and gas pressure Large fluctuations, short service life, large footprint, etc. At the same time, the light-burned magnesium kiln using this process has low production efficiency, high energy consumption, low economic benefits, and the gas is not purified, causing serious environmental pollution

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