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An integrated process and device for refractory iron ore dry grinding-suspension roasting

A technology for suspending roasting and iron ore, which is applied in the field of metallurgy and mineral engineering, can solve the problems of high water consumption, high production cost, long production process, etc., and achieve the effect of reducing power consumption

Active Publication Date: 2020-04-07
GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of long production process, high water consumption and high production cost in the existing powdery refractory iron ore suspension magnetization roasting process, the present invention provides a highly practical refractory iron ore dry grinding- Suspension roasting integrated process

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  • An integrated process and device for refractory iron ore dry grinding-suspension roasting
  • An integrated process and device for refractory iron ore dry grinding-suspension roasting

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Embodiment Construction

[0031] Below in conjunction with accompanying drawing, the present invention is explained and described in further detail;

[0032] like figure 2 As shown, a refractory iron ore dry grinding-suspension roasting integrated device includes: roller press, dry ball mill or vertical mill, indirect heat exchanger, raw material cyclone collector, suspension magnetization roasting main furnace, roasted ore cyclone Collector, magnetized roaster, suspended bed superheater, front evaporator, fluidized bed indirect heat exchanger, gas combustion system, bag filter, exhaust fan, chimney, dust cyclone collector; the exit of roller press 1 passes through The transport belt is connected to the raw material inlet of the dry ball mill or vertical mill 2; the outlet of the dry ball mill or vertical mill 2 is connected to the inlet of the raw material cyclone collector 3 through a pneumatic conveying pipeline; the raw material outlet of the raw material cyclone collector 3 is passed through the ...

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Abstract

The invention provides a refractory iron ore dry grinding-suspension roasting integration technology and device. The refractory iron ore dry grinding-suspension roasting integration technology comprises the following steps of: breaking powder iron ores by a roller press, carrying out ore grinding by a dry-type ball grinder or the roller press, fluidifying to generate fine powder gas-solid two phase flow, then introducing the fine powder gas-solid two phase flow to a raw material cyclone collector for gas-solid separation in a suspension magnetic roasting technology, introducing middle-temperature flue gas discharged by the suspension magnetic roasting technology to a dry-type ore grinding technology for fluidifying, separating to obtain iron ore powder, carrying out oxidizing roasting on iron ore powder in a suspension magnetizing roasting main furnace, preheating coal gas to 450-500 DEG C by using burnt gas discharged by the oxidizing roasting in the suspension magnetizing roasting main furnace, entering a magnetizing roasting furnace so as to carry out iron ore reducing roasting, carrying out indirect heat exchanger cooling on roasted ore produced after reducing coasting to obtain roasting ore with the relatively high magnetism by using a suspended bed supercharger and a fluidized bed. The refractory iron ore dry grinding-suspension roasting integration technology has short technological process, does not consume water, consumes little coal gas, is low in cost, reduces the carbon emission, improves environments and improves economic benefits.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and mineral engineering, and relates to a refractory iron ore dry grinding-suspension roasting integrated process and device. Background technique [0002] my country is rich in iron ore resources, and most of these iron ore resources are lean ore ore. Refractory low-grade iron ore is restricted by ore properties, its beneficiation production index has always been low, the quality of iron concentrate is poor, and the metal recovery rate is low. At present, magnetization roasting-magnetic separation technology is one of the most effective methods to deal with low-grade iron oxide ore that is difficult to sort and purify by conventional mineral processing methods. The main technology of iron ore magnetization roasting at home and abroad includes shaft furnace magnetization roasting process and rotary kiln Magnetization roasting process. [0003] Shaft furnace magnetization roasting process: the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/10B02C21/00
CPCB02C21/00C22B1/10Y02A50/2351
Inventor 权芳民寇明月王明华雷鹏飞张志刚王永刚张红军王建平邢德君靳建毅马胜军
Owner GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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