Fluidized baking device

A roasting device and fluidized state technology, applied in the field of mineral processing, can solve problems such as poor material discharge, uneven quality of reduced products, back-mixing of materials in the reduction reactor, etc., and achieve the effect of improving roasting indicators

Active Publication Date: 2018-10-19
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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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 reduc

Method used

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Experimental program
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Effect test

Embodiment 1

[0041] A fluidized state roasting device, said device includes a reduction reactor 5 arranged perpendicular to the ground and a magnetic field generating device 9 acting on the reduction reactor, said magnetic field generating device 9 generates a uniform magnetic field whose direction of the magnetic field is vertically upward, so The magnetic field generating device 9 is several groups of electromagnetic coils arranged outside the reduction reactor 5, and the magnetic field intensity generated by the electromagnetic coils is controlled by their own power supply.

[0042] The main body of the reduction reactor 5 is a cylindrical cavity container, the container of the reduction reactor 5 is made of quartz glass, the bottom of the container is provided with a gas inlet 1, and an edge is fixed on the bottom side of the container in the cavity. The gas distribution plate 3 of the wall, the gas distribution plate 3 is a porous quartz plate, on which there are distributed a number o...

Embodiment 2

[0053] This experiment was carried out in the fluidized roasting device, and the ore sample used was ore from a dressing plant in Yunnan, which belongs to hematite-limonite complex refractory iron ore. The results of chemical composition analysis of the ore are shown in Table 4, and the results of iron phase analysis are shown in Table 5. It can be seen from Table 4 that the grade of TFe in the ore is 35.25%, the content of FeO is 9.24%, and the content of SiO 2 The content is 49.41%, and the harmful element phosphorus content is low, which is 0.88%. It shows that the main valuable element of the medium ore is iron, and the main impurity component is silicon. It can be seen from Table 5 that the iron in hematite (limonite) is 34.74%, and the iron occupancy rate is 98.85%. Therefore, the main recovery objects of this middle ore are: hematite and limonite.

[0054] Table 4 Analysis of ore chemical composition / %

[0055]

[0056] Table 5 Iron chemical phase analysis results...

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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...

Claims

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Application Information

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IPC IPC(8): C22B1/10
Inventor 高鹏韩跃新唐志东李艳军
Owner NORTHEASTERN UNIV
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