Device and method used for realizing powdery iron mineral magnetization treatment and generating steam

Abstract

The invention discloses a device and a method used for realizing powdery iron mineral magnetization treatment and generating steam, and belongs to the technical field of refractory iron mineral magnetization treatment. The device is composed of a feeding system, a roasting system, a magnetizing separation system, a cyclone dust removing system, and a steam generation system; compared with conventional shaft kiln and rotary kiln technology, adaptability on iron mineral raw material is higher; powdery iron mineral magnetization treatment requirements can be satisfied; magnetisability, recovery rate, resource utilization rate, and thermal efficiency are high; energy can be saved by almost 70% compared with that of rotary kiln technology, and construction investment is reduced by almost 50%. According to the method, fluidization technology is adopted for recovery of high temperature flue gas and material waste heat, and saturated steam or middle pressure steam used for electricity generation can be produced based on actual demands; and the method is high in automatic degree, is convenient for operation, and is high in single production yield.

Description

technical field [0001] The invention belongs to the technical field of magnetization treatment of refractory iron minerals, and in particular relates to a device and a process method for magnetization treatment of powdered iron minerals and production of steam. Background technique [0002] At present, for refractory iron minerals, due to their weak magnetism, it is difficult to separate iron minerals by magnetic separation. Therefore, it is necessary to transform weak magnetic minerals into strong magnetic minerals through magnetization treatment, and then perform magnetic select. [0003] The traditional magnetic treatment of refractory iron minerals adopts the vertical kiln and rotary kiln process, but the traditional vertical kiln and rotary kiln process still has the following disadvantages in the magnetization treatment of iron minerals: [0004] ① When the processed refractory iron ore raw materials are bulk materials, the remaining refractory iron ore raw materials ...

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Problems solved by technology

[0004] ① When the processed refractory iron ore raw materials are bulk materials, the remaining refractory iron ore raw materials are treated as waste, which greatly wastes mineral resources;

[0005] ② During the magnetization treatment of refractory iron minerals, over-burning and under-burning are prone to occur, resulting in low magnetization reduction of refractory iron minerals;

[0006] ③ There are technical problems such as ring formation, crust and frit in vertical kiln and rotary kiln;

[0007] ④ During the entire magnetization process, the heat dissipation is large and the exhaust gas temperature is high, and the waste heat is not recycled, which wastes waste heat resources;

[0008] ⑤There are many operating equipment and high failure rate, resulting in high maintenance costs;

[0009] ⑥Single production capacity of shaft kiln and rotary kiln is small, and construction cost and operation cost are high

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