Depth-induced crushing mineral separation technology of super-lean magnetic iron ore

Abstract

The invention relates to a depth-induced crushing mineral separation technology of super-lean magnetic iron ore, which is applied to the technical field of mineral separation of super-lean magnetic iron ore. The technology comprises the following steps: after coarsely crushing and intermediately crushing the super-lean magnetic iron ore by adopting a gyratory crusher and a cone crusher respectively, performing one-stage magnetic-pulley dry discarding pre-separation, performing two-stage magnetic-pulley dry discarding on tailings, and finely crushing the fine ore through a hammer crusher; sieving the finely crushed product, returning the fine ore for fine crushing operation, and sieving the tailings to serve as a gravel aggregate product; performing dry separation on ore concentrate, milling ores by adopting a ball mill, and performing once coarse separation, twice fine separation, once concentration and once filtration to obtain dry ore concentrate; performing selective grinding on the tailings, concentrating by a concentrator, filtering through a filter, and performing dry heaping on the filtered tailings and the tailings from the dry separator. According to the super-lean magnetic iron ore which contains about 5% of magnetic iron, the tailings after dry discarding are sieved to serve as the gravel aggregate product for depth-induced crushing, the feeding amount is reduced, the mineral separation cost is reduced, and the economic benefits are obviously improved.

Description

technical field [0001] The invention relates to an ultra-lean magnetite ore deep crushing and beneficiation process in the technical field of ultra-lean magnetite ore beneficiation. Background technique [0002] Iron ore is the most important basic raw material for the steel industry. With the rapid development of the national economy, my country's demand for iron ore resources has increased dramatically. At the same time, domestic iron ore that is easy to choose is decreasing. According to the announcement of the Ministry of Land and Resources, in 2010, the country's proven iron ore resource reserves were 72.699 billion tons, of which: reserves were 7.9 billion tons, basic reserves were 22.232 billion tons, and resources were 50.467 billion tons. Part of it is poor ore, and the rich ore is only 927 million tons, accounting for 1.2%. The development of domestic ultra-poor magnetite has become an effective method to solve the shortage of domestic iron concentrate. At prese...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a deep crushing and beneficiation process of ultra-lean magnetite ore, so as to solve the problems that in the ultra-lean magnetite ore beneficiation process, the processing capacity of raw ore grinding is large, the processing cost of a large amount of tailings produced is high, and the economic benefit of beneficiation is low. , realize the comprehensive utilization of ultra-poor magnetite ore, ultra-poor magnetite ore undergoes deep crushing, and is pre-selected by dry throwing in advance to obtain qualified concentrate and improve the efficiency of ore dressing

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