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Magnetic separation device and magnetic separation method for reducing hematite-containing materials by microwave

A magnetic separation device and iron mineral technology, applied in chemical instruments and methods, magnetic separation, solid separation, etc., can solve the problems of unqualified equipment structure and related technologies, poor reduction roasting quality, and large dust content in tail gas. Achieve the effect of shortening the response time, reasonable distribution of the magnetic system, and large processing capacity

Active Publication Date: 2016-02-17
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The equipment for realizing the above method mainly includes shaft furnaces, rotary kilns and fluidized fluidized furnaces, etc., but these equipments have disadvantages such as low heat transfer coefficient and long reduction time, resulting in unqualified equipment structure and related technologies, not only poor reduction and roasting quality, but also Large, complex structure, high energy consumption, low processing capacity, large dust content in exhaust gas, complex dust collection system, and large investment

Method used

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  • Magnetic separation device and magnetic separation method for reducing hematite-containing materials by microwave
  • Magnetic separation device and magnetic separation method for reducing hematite-containing materials by microwave
  • Magnetic separation device and magnetic separation method for reducing hematite-containing materials by microwave

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Example 1: see Figure 1-Figure 3 , A magnetic separation device for microwave reduction of hematite-containing mineral materials, including a silo 1, a screw feeder 2, a star feeder 3, a preheating reactor 5 and a microwave magnetic separator 6; the upper part of the microwave magnetic separator 6 , The bottom is respectively provided with a discharge port 13 and a discharge port 12; the bottom of the preheating reaction furnace 5 communicates with the combustion chamber 4, the gas in the gas storage tank 9 and the air blown in by the blower 10 are mixed and burned through the burner 11 The chamber 4 is combusted, and the high-temperature CO gas produced after the combustion enters from the bottom of the preheating reactor 5.

[0033] The microwave magnetic separator 6 includes: a reactor shell 6-1, a reactor cavity 6-2, an air inlet pipe 6-4, an air outlet pipe 6-5, a discharge pipe 6-6, a microwave source 7, a magnetic system 8. The air inlet pipe 6-4 communicates with...

Embodiment 2

[0035] Example 2: see Figure 4 , Using the magnetic separation device of Example 1 to magnetically separate hematite (Fe 2 O 3 ) The material method includes the following steps:

[0036] The hematite-containing mineral material is crushed to 80-100 mesh powder, and added to the silo 1, the powder enters the preheating reactor 5 through the screw feeder 2, the star feeder 3, and the preheated powder Enter the microwave magnetic separator 6 through the air inlet pipe 6-4 for microwave heat treatment and magnetic separation; the products after magnetic separation are discharged from the discharge port 12 through the discharge pipe 6-6, and other materials are discharged through the outlet pipe 6-5. Discharge from the discharge port 13; or discharge through the discharge port after dust removal.

[0037] Among them, the material containing hematite can be steel slag, low-grade limonite, iron ore and other ores.

[0038] The preheating is to heat the powder to 300-400°C; the microwave ...

Embodiment 3

[0040] Example three: see Figure 4 , The method of magnetic separation of steel slag using a magnetic separation device, the adopted magnetic separation device is as described in Example 1. The method includes the following steps:

[0041] The steel slag is crushed into 80-100 mesh powder, and 100kg of powder is measured and added to the silo 1. The powder in the silo 1 passes through the screw feeder 2 and the star feeder 3, and enters the preheating reactor 5 for preheating ;

[0042] Adjust the gas in the gas storage tank 9 and the air blown by the blower 10, mix them through the burner 11 and burn them in the combustion chamber 4. The high temperature CO gas produced after combustion enters the bottom of the preheating reactor 5 to preheat the materials;

[0043] After the preheated material reaches 300℃, it enters the microwave magnetic separator 6 through the air inlet pipe 6-4 for microwave heat treatment. The microwave power is 15KW. Adjust the microwave output power to turn...

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Abstract

The invention relates to a device and a magnetic separation method for reducing hematite-containing materials by microwave heat treatment and performing magnetic separation. The device includes a feed bin, a screw feeder, a star feeder, a preheating reaction furnace and microwave magnetic separation During magnetic separation, the material is crushed and then added to the silo. The powder enters the preheating reaction furnace through the screw feeder and the star feeder for preheating. The preheated powder enters the microwave magnetic separator through the air inlet pipe for further processing. Microwave heat treatment and magnetic separation; the product after magnetic separation is discharged from the discharge port through the ore discharge pipe, and other materials are discharged from the discharge port through the air discharge pipe. In the present invention, the weak magnetic Fe2O3 in the material is reduced to the strong magnetic Fe3O4 by microwave heating, and the iron concentrate is separated by magnetic separation, and the reduction and magnetic separation are integrated at the same time, the equipment is simple, the investment is small, the energy consumption is low, and the treatment Large amount; water saving, no air pollution, can process a variety of hematite-containing materials, including steel slag, low-grade limonite, iron ore and other ores, with a wide range of applications and good promotion prospects.

Description

technical field [0001] The invention relates to a magnetic separation device and a magnetic separation method for separating hematite-containing materials, in particular to a device and a magnetic separation method for reducing hematite-containing materials by microwave heat treatment and performing magnetic separation. Background technique [0002] Steel slag is the waste slag produced in the steelmaking process, and the amount is about 15-20% of the steel output. In recent years, with the rapid development of my country's iron and steel industry, the discharge of steel slag has also increased. A large amount of steel slag needs a large area of ​​land to be piled up every year, which brings serious pollution to soil, water body, atmosphere, etc., and even poses a threat to people's health. However, in fact, the useful components in the steel slag account for the vast majority, as long as the harmful components in the steel slag are removed, it can be comprehensively utiliz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03C1/00B03C1/015C22B1/00
Inventor 张雪峰李保卫贾晓林王建英李超罗家骏
Owner INNER MONGOLIA UNIV OF SCI & TECH
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