Fluidized baking device

Abstract

The invention relates to a fluidized baking device, and belongs to the technical field of mineral processing. The fluidized baking device comprises a reduction reactor perpendicular to the ground, anda magnetic field generation device acting on the reduction reactor, wherein a magnetic field generated by the magnetic field generation device is perpendicular to an upward uniform magnetic field; the main body of the reduction reactor is a columnar cavity container; a gas inlet is formed in the bottom of the container; a gas distribution plate with the edge fixed on the side wall of the bottom of the container is arranged in a cavity; the cavity between the gas distribution plate and the gas inlet is a gas distribution chamber; a material inlet is formed in the side wall above the gas distribution plate; a gas outlet is formed in the top of the reduction reactor container; and a material outlet is formed in the side wall of the upper part of the reaction reactor container. By adding a stable magnetic field on the periphery of the reaction reactor and reasonably controlling the flow behavior of magnetic particles in the reactor, the gas-solid two-phase flow in the fluidized baking device is relatively stable, gas and iron ores are fully reacted, and the baking efficiency is improved.

Description

technical field [0001] The invention relates to a fluidized roasting device, which belongs to the technical field of mineral processing. Background technique [0002] Iron ore is a guaranteed resource for my country's iron and steel industry and is a major strategic demand of the country. my country's iron ore resources are poor in endowment, difficult to use, and high in mining and dressing costs. Domestic iron ore has been in a serious shortage for a long time. In 2016, my country imported 1.024 billion tons of iron ore, and its dependence on foreign countries exceeded 86%, a record high. In February 2017, the import price of iron ore rose to US$90 / ton, which directly led to a substantial increase in the cost of importing iron ore in my country. This not only seriously affected my country's steel industry, but also posed a huge threat to the safe operation of the national economy. Among the complex and refractory iron ore resources in my country, fine-grained ore, siderit...

AI Technical Summary

Problems solved by technology

[0006] In summary, although the existing fluidized roasting technology can greatly improve the iron grade and recovery rate, if the roasting process is not properly operated, there will still be serious back-mixing of the materials in the reduction reactor and uneven quality of the reduced products. Therefore, the development of a new type of fluidized roasting reaction device is of great significance for the effective control of gas-solid flow and chemical reactions in the reactor.

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