System and method for improving selectivity of artificial magnetite

An artificial magnet and magnetization roasting technology, applied in the field of metallurgy and mineral processing, can solve the problems of metal loss, inability to recover by weak magnetic separation, etc., and achieve the effect of improving selectivity, small coercive force, and low specific magnetic susceptibility coefficient

Pending Publication Date: 2021-07-09
GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

γ-Fe 2 o 3 It is a strong magnetic mineral, which can be effectively recovered by weak magnetic separation, and α-Fe 2 o 3 Belonging to weak magnetic minerals, it cannot be recovered by weak magnetic separation, and it is easy to cause metal loss

Method used

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  • System and method for improving selectivity of artificial magnetite
  • System and method for improving selectivity of artificial magnetite
  • System and method for improving selectivity of artificial magnetite

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Embodiment Construction

[0023] The system and method of increasing the selectivity of the present invention will be further described below in conjunction with the accompanying drawings.

[0024] Such as Figure 1-3 As shown, a system for improving the selectivity of the artificial magnetite, including the magnetized roasted furnace 1, the remaining heat boiler 2, the first material sealing device 3, the re-oxidation reaction chamber 4, the second material sealing device 14, the mixer 5, The dust collector 12, the nitrogen pipeline 10, the compressed air line 11, the wafer groove 15, and the detecting instrumentation 8, 9, 13. The magnetized roasted furnace 1 is connected to the remaining heat boiler 2 feed port, and the remaining heat boiler 2 is connected to the first material sealing device 3 feed port, and the first material sealing device 3 discharge port and the reoxidation reaction chamber 4 The inlet 401 is connected, and the re-oxidation reaction chamber 4 is provided with a winding device 402 an...

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Abstract

The invention discloses a system and method for improving selectivity of artificial magnetite. The system comprises a magnetizing roaster, wherein a discharge hole of the magnetizing roaster is connected with a feeding hole of a waste heat boiler; the discharge hole of the waste heat boiler is connected with the feeding hole of a first material sealing device; the discharge hole of the first material sealing device is connected with the feeding hole of a reoxidation reaction chamber; an air inlet in the bottom of the reoxidation reaction chamber is connected with a mixer through a mixed gas pipeline; an adjusting valve, a flow meter and a pressure gauge are arranged on the mixed gas pipeline; the mixer is connected with a nitrogen pipeline and a compressed air pipeline; and adjusting valves and flow meters are arranged on the nitrogen pipeline and the compressed air pipeline. Through the system and the method, the artificial magnetite can be prevented from generating the hematite (alpha-Fe2O3) with weak magnetism through 'peroxidation', calcine containing the maghemite (gamma-Fe2O3) with strong magnetism characteristics is obtained, the selectivity of the artificial magnetite can be greatly improved, and the maghemite (gamma-Fe2O3) has important guiding significance for mineral processing industry production.

Description

Technical field [0001] The invention is in the field of metallurgy and mineral processing, involving a system and method for improving the optionality of artificial magnetite. Background technique [0002] my country's complicated difficulty in iron ore resources is very rich, and its resource is low, the mineral composition is complex, the magnetic is weak, and the lack of grain is fine. It is difficult to obtain an ideal sorting index of the conventional ore process. If such an ore is treated with magnetization, the obtained artificial magnetite will be magnetically selected, anti-floating selection and other processes, often able to achieve better distribution indicators. [0003] In recent years, the flash magnetization roasting, suspension magnetization roasting technologies have been achieved, and the liquid-based magnetized roasting technology has been used in industrial applications. Compared with the traditional rotary kiln, the magnetization roasting method such as the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02
CPCC22B1/02
Inventor 陈毅琳高泽宾孙洪硕苏显堂李景涛李广文崔建辉秦丽娜魏明星
Owner GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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