Technology method and device of pneumatic separation and magnetic separation for dry method ore grinding of iron ores

Abstract

The invention discloses a technology method and a device of pneumatic separation and magnetic separation for dry method ore grinding of iron ores. The technology method includes the steps that the crushed iron ores are grinded to form a mixture of ore grains and ore powder through a dry vertical milling machine; the ore powder is separated from particles through a multi-stage lifting windowing machine; and the ore grain is subjected to multi-stage magnetic separation through a multi-stage magnetic roller concentrating machine to be sorted to good-taste fine ore, ordinary-taste middling and low-taste tailings, and the middling is placed in the dry vertical milling machine to be grinded again. The device includes the dry vertical milling machine which is connected with the multi-stage lifting windowing machine through an ore grain transport mechanism, the multi-stage lifting windowing machine is connected with a powder collecting device and the multi-stage magnetic roller concentrating machine, and the multi-stage magnetic roller concentrating machine is connected with a fine ore collecting device, a tailings collecting device and the dry vertical milling machine. According to the technology method and the device of the pneumatic separation and the magnetic separation for dry method ore grinding of the iron ores, ore grinding and ore separation can be carried out under the condition of dry or less water consumption.

Description

technical field [0001] The invention relates to the field of iron ore grinding and beneficiation, in particular to a process and a device for iron ore dry grinding and beneficiation. Background technique [0002] At present, the wet mineral processing process is mainly used to improve the ore grade. The process steps are: after the mined raw ore is crushed, it is ground by a horizontal ball mill system to make a slurry suitable for mineral processing. High concentrate powder and tailings with low iron grade. The grinding process of ore slurry needs to consume a lot of water resources, especially in mining areas that lack water sources, water conservation and water intake have become difficult problems. [0003] In order to alleviate the above-mentioned problems, grinding and beneficiation under the condition of no water or less water consumption has become the goal pursued by people, but at present, the practical application of the whole process of dry grinding and dry sepa...

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Problems solved by technology

[0004] Purpose of the invention: the purpose of the present invention is to provide a process and device for dry grinding, air separation and magnetic separation of iron ore in view of the large water resource consumption problem in the existing wet grinding ore dressing process. The process and device can be used for grinding and beneficiation under the condition of no water or less water consumption

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