Separation technology of specularite after reduction roasting

A technology of roasting and rear mirror, which is applied in flotation, solid separation, wet separation, etc. It can solve the problems of large roasting furnace processing capacity, inability to use industrial production, and reduce iron recovery rate, so as to save equipment and infrastructure investment, The effect of high recovery rate and reduction of treatment volume

Inactive Publication Date: 2015-03-25
MCC NORTH (DALIAN) ENG TECH CO LTD
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Problems solved by technology

Although this process can obtain qualified coating-grade mica products and smelting-grade concentrate products, because the roasted raw materials in this process are fine-grained products below 0.6mm, it can only be used for laboratory experiments and cannot be used for industrial production (because Industrial production roasting furnace has a large processing capacity of 10 2 Ton level, a large amount of fine powder ore into the roaster will cause the furnace to extinguish the fire; the laboratory processing capacity is 10 3 Small roasting furnace with large air volume can handle the level below gram
), so using this process will cause a lot of iron loss below -0.6mm and reduce the recovery rate of iron

Method used

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  • Separation technology of specularite after reduction roasting

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Embodiment Construction

[0025] The specific embodiments of the present invention will be further described below in conjunction with the drawings.

[0026] Such as figure 1 As shown, a sorting process for specularite after reduction roasting of the present invention includes a specularite reduction roasting system, which is characterized by:

[0027] a. The reduced-roasted, water-purified specularite product is pre-selected and thrown by a dry separator. The dry beneficiation concentrate is fed into a ball mill-cyclone closed circuit to enter the magnetic separation system; the present invention uses reduced-roasted specularite The ore is used as a feed before magnetic separation, which greatly enhances the magnetic properties of specularite iron oxide minerals. The specularite reduction roasting system feeds 15mm-50mm lump ore, and the product after reduction and roasting has a particle size of 0 mm -15mm, the dry concentrate yield rate is 90%, the grade is over 40%, and the iron recovery rate is 98%. T...

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Abstract

The invention belongs to the field of mineral processing technologies and particularly discloses a separation technology of specularite after reduction roasting. The separation technology relates to a specularite reduction roasting system and is characterized in that the specularite after reduction roasting and water quenching is fed into a three-section stage grinding stage separation process of a magnetic separation system and is subjected to roughing flotation one time, fine flotation one time and scavenging operation four times, the final iron ore concentrate grade is 60%-62%, and the recovery rate is 80%-85%. Iron ore concentrate products meet the requirement of sintering process, in addition, the recovery rate is high, and therefore economic benefits of separation plants are greatly increased.

Description

Technical field [0001] The invention belongs to the technical field of iron ore beneficiation, in particular to a sorting process of specularite after reduction roasting. Background technique [0002] There are abundant specular iron ore in the Jiayuguan area of ​​Gansu, my country. The main types of ore industries in this area are specular iron ore, specular iron siderite mixed ore and specular iron limonite mixed ore. Among them, the optional minerals specularite and limonite are weakly magnetic minerals. It is difficult to directly use magnetic separation to separate the final iron concentrate grade higher than 47%, and the recovery rate is difficult to exceed 60%, resulting in poor quality of concentrate products. It is not as high as the quality requirements of industrial applications, the iron loss is large, and the efficiency of the concentrator is low. The lump part of specularite in this area is reduced and roasted to reduce the oxidation degree of iron minerals in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03D1/00
CPCB03B7/00B03D1/00
Inventor 李国洲
Owner MCC NORTH (DALIAN) ENG TECH CO LTD
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