High-pressure roller mill ultra-fine crushing and coarse-grain tailing method applied to mafic ore

Abstract

The invention relates to the technical field of mineral processing, in particular to a high-pressure roller mill super-fine coarse grain crushing tailings discharging method applied to ludwigite. 12-0mm raw ore materials after being crushed are fed into a high-pressure roller mill to be rolled and pressed, ore pulp is formed after discharged materials of the high-pressure roller mill are mixed with water, and is fed into a wet type screening machine, oversize coarse particles are mixed with raw materials to be conveyed to the high-pressure roller mill again to be rolled and pressed, and the sieving ore pulp is superfine crushed products to be fed into a next procedure; and after output materials are crushed by the high-pressure roller mill, the particle size of the output materials is controlled to be 5-0 mm; and secondly, the ore pup in the first step is subjected to coarse particle tailings discharging magnetic separation, and gangue mineral containing surrounding rock is abandonedto serve as tailings I; and the remaining is separated magnetic concentrate which enters the next procedure. According to the high-pressure rolling and grinding super-fine coarse grain crushing tailings discharging method applied to the ludwigite, the comprehensive utilizing level of low-grade uranium ferroboron associated ore is improved while the mineral separation machining cost is reduced.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a beneficiation process of low-grade uranium-boron-iron associated ore using a high-pressure roller mill. Background technique [0002] The boron ore deposit where boron and iron are symbiotic, the main ore minerals are magnetite and boronite, followed by fibrous boronite, Suianite, and crystalline uranium ore. Iron, boron, and uranium are important raw materials for steel, chemical industry, and energy. However, the primary ore and useful minerals are finely distributed and have complex intergenerational characteristics, which cause many difficulties for the comprehensive utilization of ore. [0003] The existing beneficiation process mainly adopts two-stage grinding and classification-two-stage magnetic separation process to recover iron ore concentrate. The two-stage magnetic separation comprehensive tailings are screened into two particle sizes and then re-selected...

AI Technical Summary

Problems solved by technology

The outstanding problems of this process are high grinding power consumption, low processing capacity of the mineral processing process, insufficient dissociation of iron and boron monomers, especially when the processing capacity of the mineral processing process is increased, the coarsening of the grinding particle size results in coarse particle size of the magnetic separation tailings , the dissociation conditions of uranium cannot be reached, and the quality of uranium concentrate is unstable. At the same time, due to ore depletion, the boron grade of the raw ore entering the mill is only 4-5%, and the boron grade of a section of weak magnetic tailings is only 5-6%. The second-stage weak magnetic tail is discarded after the synthesis of boron concentrate affects the grade of boron concentrate, resulting in a waste of resources

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