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Device for separating roasting material through air-cooling regulation and control magnetic reinforcement and recycling latent heat

A technology for roasting materials and materials, which is applied in the direction of devices whose axial direction can be reversed, magnetic separation, and swirl devices, etc., which can solve problems such as high energy consumption and magnetic agglomeration of products, and achieve high heat transfer efficiency and reduce Magnetic agglomeration, strong practical effect

Active Publication Date: 2020-09-08
SHANGHAI MILESTONE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the technical problems of high energy consumption and serious magnetic agglomeration of products in the existing magnetization roasting-magnetic separation recovery technology for refractory iron ore treatment, the present invention provides a method for air-cooling and regulating magnetically intensified sorting of roasted materials and recovery of latent heat device

Method used

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  • Device for separating roasting material through air-cooling regulation and control magnetic reinforcement and recycling latent heat
  • Device for separating roasting material through air-cooling regulation and control magnetic reinforcement and recycling latent heat

Examples

Experimental program
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Effect test

Embodiment 1

[0051] The structure of the device for air-cooling the roasted material to regulate magnetically enhanced separation and recover latent heat is as follows: figure 1 Shown, comprise nitrogen cooling cyclone separator group, flow sealing valve (7), air cooling cyclone separator group and magnetic separator (14);

[0052] The nitrogen cooling cyclone separator group is composed of 3 stages of nitrogen cooling cyclone separators, the outlet of the first stage nitrogen cooling cyclone separator (1) is connected with the inlet of the second stage nitrogen cooling cyclone separator (3), the second stage of nitrogen cooling cyclone separator (3) The gas outlet of the second-stage nitrogen-cooled cyclone separator (3) is connected with the inlet of the first-stage nitrogen-cooled cyclone separator (1), and the outlet of the second-stage nitrogen-cooled cyclone separator (3) is connected with the inlet of the third-stage nitrogen-cooled cyclone separator. The feed inlet of the nitrogen ...

Embodiment 2

[0070] Device structure is the same as embodiment 1;

[0071] Method is with embodiment 1, and difference is:

[0072] (1) The particle size of the roasted material -0.074mm accounts for 70% of the total mass, and the temperature of the roasted material is 550°C. The Fe content of magnetite in the roasted material accounts for 96% of the total Fe in the reduced roasted material; complex refractory ore iron Grade TFe 30.28%, containing SiO by mass percentage 2 29.21%;

[0073] (2) The roasted material is cooled to 260° C. in the nitrogen-cooled cyclone group; the residence time of the reduced roasted material in the nitrogen-cooled cyclone group is 15 minutes;

[0074] (3) The residence time of the cooling roasting material in the air cooling cyclone separator group is 8min;

[0075] (4) The magnetic field strength of weak magnetic separation is 1300Oe, obtains iron ore concentrate, iron grade TFe 57.93%; The rate of recovery of Fe is 86.52%; Compared with the weak magnetic...

Embodiment 3

[0077] Device structure is the same as embodiment 1;

[0078] Method is with embodiment 1, and difference is:

[0079] (1) Particle diameter -0.074mm of the roasted material accounts for 80% of the total mass, and the temperature of the roasted material is 510°C. The Fe content of magnetite in the roasted material accounts for 94% of the total Fe in the reduced roasted material; complex refractory ore iron Grade TFe 42.19%, containing SiO by mass percentage 2 50.67%;

[0080] (2) The roasted material is cooled to 280°C in the nitrogen-cooled cyclone group; the residence time of the reduced roasted material in the nitrogen-cooled cyclone group is 17 minutes;

[0081] (3) The residence time of the cooling roasting material in the air-cooling cyclone separator group is 5min;

[0082] (4) The magnetic field intensity of weak magnetic separation is 1700Oe, obtains iron ore concentrate, iron grade TFe58.26%; The rate of recovery of Fe is 85.4%; Compared with the weak magnetic or...

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Abstract

The invention discloses a device for separating a roasting material through air-cooling regulation and control magnetic reinforcement and recycling latent heat. The device is characterized in that contact heat exchangers are distributed inside a nitrogen cooling cyclone separator group and an air cooling cyclone separator group correspondingly; the nitrogen cooling cyclone separator group is composed of 1-n stages of nitrogen cooling cyclone separators; the air cooling cyclone separator group is composed of 1-n stages of air cooling cyclone separators; and the nitrogen cooling cyclone separator group, a flow sealing valve and the air cooling cyclone separator group communicate in series. The device is high in heat transfer efficiency, easy to enlarge, high in practicability, capable of achieving accurate regulation and control and sectionally regulating the cooling atmosphere, capable of being used in cooperation with a fluidized bed and a suspension roasting furnace, suitable for magnetizing roasting cooling of iron ore and not limited to application in magnetizing roasting cooling of the iron ore.

Description

technical field [0001] The invention belongs to the technical field of mineral processing equipment, and in particular relates to a device for air-cooling and regulating magnetically intensified sorting of roasted materials and recovering latent heat. Background technique [0002] In the context of the depletion of high-grade iron ore, the efficient development and utilization of low-grade refractory iron ore has become a current hot spot. At present, magnetization roasting technology is an effective technology for processing refractory iron ore. As far as the temperature change of iron ore in magnetization roasting is concerned, it can be roughly divided into two stages: material heating and reduction and material cooling; in industrial production, it can be Design a waste heat recovery and reuse device to reduce energy consumption and improve energy utilization; currently, in the magnetization roasting process of iron ore, the recovery of heat energy is mainly focused on t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/26B03C1/015B04C5/26F27D17/00
CPCB03C1/015B04C5/26C22B1/26F27D17/004
Inventor 韩跃新李艳军袁帅张琦高鹏孙永升
Owner SHANGHAI MILESTONE TECH CO LTD
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