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Cyclone suspension flash magnetized roasting-magnetic separating method for refractory ferric oxide ore

A technology of magnetization roasting and iron oxide, which is applied in metallurgy and material fields, can solve the problems of large comprehensive transfer coefficient, large transfer power, and large transfer area, and achieve the effects of high-efficiency separation, reduced energy consumption, and simple production process

Active Publication Date: 2006-05-24
湖南长拓高科冶金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] ①Large transfer area
[0005] ②Comprehensive transfer coefficient is large
[0006] ③Large transmission power

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: After flash magnetization roasting-magnetic separation of Daye Iron Mine in Wuhan Iron and Steel Co., Ltd. (iron grade 34.20%), the reaction time is nearly 100 times higher than that of traditional magnetization roasting-magnetic separation, and iron concentrate is obtained. The grade is 60-61%, the yield is 44-51%, the recovery rate is 83-88%, and the iron grade of tailings is 7-9%, which is a good indicator. Based on the current market price of Daye Iron Mine iron concentrate products at 500 yuan per ton, the grade of iron concentrate will increase to 60% after technical transformation. 30 million tons of tailings are subjected to flash magnetization roasting-magnetic separation with a concentrate yield of 30%, so the total output value can be realized as follows: 3000×30%×500=450,000 million yuan. Significant economic benefits.

Embodiment 2

[0022] Embodiment 2: Adopt flash magnetization roasting-magnetic separation process, remove sodium pyroxene and sodium amphibole gangue minerals for iron oxide ore strong magnetic roughing iron concentrate in Baotou Steel Concentrator, and reduce potassium in iron concentrate , Sodium content, improve the grade and recovery rate of iron ore concentrate, and lay a technical foundation.

Embodiment 3

[0023] Embodiment 3: to the flash magnetization roasting-magnetic separation test of the refractory iron ore (mainly siderite) of Jiuquan Iron and Steel Company and Shaanxi Daxigou Iron Mine, the reaction time is short, realize fast reduction in 100 seconds, reclaim works well. However, using the traditional rotary kiln magnetization roasting-magnetic separation process for recovery, the reaction time to obtain qualified iron concentrate is more than 60 minutes.

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Abstract

The present invention relates to a cyclone suspension flash magnetizing roast-magnetic separation method for difficult-separable ironoxide ore. Its concrete steps are as follow: firstly, roasting the powdered difficult-separable ironoxide ore granules or fire-ground strong-magnetically-separated chats in the separation process under the condition of high-temperature reduction atmosphere and cyclone suspension fluidized state to make them be quickly dynamically reduced into magnetite within 5-100 sec. then adopting weak magnetic separation process to obtain high-quality acceptable iron headings.

Description

technical field [0001] The invention relates to the fields of metallurgy and materials, in particular to a swirl suspension flash magnetization roasting-magnetic separation method for refractory iron oxide ore. Background technique [0002] my country is a country with serious shortage of iron ore resources. And half of the total iron ore reserves belong to refractory iron oxide ores (iron minerals such as hematite and siderite have a magnetic susceptibility coefficient of 15-600×10 -6 cm 3 / g exists in the form of weakly magnetic minerals), not only low iron content, fine particle size distribution, but also a large number of gangue minerals such as iron-containing silicate with similar physical and chemical properties, which makes sorting very difficult. In order to rationally develop and utilize these minerals, complex beneficiation processes and multi-stage separations are often used. However, due to the poor quality of raw ore, it is not only difficult to obtain high...

Claims

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Application Information

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IPC IPC(8): B03C1/015B03C1/32
Inventor 余永富张汉泉祁超英胡承凡任亚峰
Owner 湖南长拓高科冶金有限公司
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