Method for recovering waste heat of electrically fused magnesium fused weight

Abstract

The invention relates to a method for breaking an electrically fused magnesium fused weight and simultaneously recovering waste heat by a dry quenching method, which belongs to the field of electrically fused magnesium smelting and provides an energy-saving technology for recycling the waste heat in the cooling process of the magnesium fused weight. The heat energy of the high-temperature magnesium fused weight is recovered by the dry quenching method in the cooling process of the magnesium fused weight, steam is generated through a heat exchanger by heat circulating gas which is obtained by adopting a direct countercurrent flow method of the air and the high-temperature magnesium fused weight, the steam is utilized for generating electricity, and the invention is used for the magnesite smelting process, achieves the purpose of energy saving, is beneficial to reducing the energy consumption level of electrically fused magnesium, achieves the coupling optimization of waste heat utilization and electrically fused magnesium quality improvement and has remarkable economic and social benefits.

Description

technical field [0001] The invention belongs to the field of fused magnesia smelting, relates to an energy-saving technology for the cooling process of magnesium fused lumps, and provides a method for utilizing waste heat of fused magnesia fused lumps, which can break magnesium fused lumps and recover and utilize waste heat at the same time, so that energy utilization can reach the maximum optimization. Background technique [0002] In recent years, due to the impact of excessive resource consumption and energy crisis, the state has paid close attention to the work of "energy saving and emission reduction" year by year. Fused magnesia is a high energy consumption and high pollution industry. The high energy consumption of the fused magnesium industry has become a bottleneck restricting the development of the industry, and reducing the unit consumption of smelting has become an urgent task for the government and enterprises. my country's magnesite smelting technology is sti...

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Problems solved by technology

[0005] At present, there is no specific process technology for the recovery and utilization of waste heat from magnesium fused lumps in my country, and it is still in the stage of theoretical research. Increase and other problems, the present invention provides a method for recovering the waste heat of magnesium fused lumps, mainly focusing on recovering the heat energy of high-temperature magnesium fused lumps by dry quenching during the cooling process of magnesium fused lumps, and adopting the method of direct countercurrent heat exchange between air and high-temperature magnesium fused lumps, The obtained thermal cycle gas passes through the heat exchanger to generate steam, which is used to generate electricity and used in the magnesite smelting process to achieve the purpose of energy saving, which is beneficial to reduce the energy consumption level of fused magnesium, and the utilization of waste heat and the improvement of the quality of fused magnesium achieve the best coupling optimization, with significant economic and social benefits

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