Fluorite lean ore color sorting upgrading-tailing pre-sorting method

A technology of lean ore and fluorite, which is applied in the field of fluorite lean ore color separation and quality improvement-tailing pre-selection, can solve the problems of low operation rate and high labor cost, reduce the amount of raw ore, improve the quality of sorting, and improve The effect of selected grades

Active Publication Date: 2019-11-15
ZHENGZHOU MINERALS COMPOSITIVE UTILIZATION RES INST CHINESE GEOLOGICAL ACAD
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Problems solved by technology

Hand selection is generally used for fluorite mines with clear boundaries between fluorite and gangue and easy to identify with naked eyes. It can sort better quality fluori...

Method used

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  • Fluorite lean ore color sorting upgrading-tailing pre-sorting method
  • Fluorite lean ore color sorting upgrading-tailing pre-sorting method
  • Fluorite lean ore color sorting upgrading-tailing pre-sorting method

Examples

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Embodiment

[0025] A low-grade fluorite mine in Hebei, raw ore CaF 2 The grade is 31.83%, and the main gangue minerals are quartz (35.79%), potassium feldspar (14.84%), sericite (5.19%) and clay minerals (2.52%). The gangue minerals in this fluorite mine are mainly silicate minerals, and the content of primary slime is relatively high. After crushing in two stages and one closed circuit, the particle size composition and fluorite distribution of the product are shown in Table 1. See Table 2 for the sorting results of the products on the sieve (-15 ~ +5mm products) after the first stage of color selection for quality improvement - the second stage of color separation for tailing.

[0026] Table 1 Results of distribution rate of broken products

[0027]

[0028] Table 2 Color Sorting and Quality Improvement - Finishing Results

[0029]

[0030]

[0031] It can be seen from Table 1 that due to the presence of a large number of hard silicate minerals, the fluorite is preferentiall...

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Abstract

The invention provides a fluorite lean ore color sorting upgrading-tailing pre-sorting method. The method comprises the following steps that (1) fluorite lean ore is crushed through two sections of closed circuits, and crushed products are -15 mm; (2) the crushed products are screened to obtain oversize products and undersize products, wherein the size of sieve pores is 5 mm, and the oversize products enter a first section color sorter for fluorite upgrading and sorting to obtain lump ore concentrates; (3) tailings sorted through the first section of color sorter enter into a second-section color sorter for tailing discarding sorting to obtain lump ore tailings and lump ore middlings; and (4) the undersize products in the step (2) and the lump ore middlings in the step (3) are mixed and ground, and then flotation is conducted. According to the method, the raw ore amount entering a ball mill is greatly reduced by pre-upgrading and sorting and pre-tailings-discarding of a large quantityof hard minerals, so that the beneficiation feed grade is improved, over-crushing of the hard minerals to the fluorite in the ore grinding process is reduced, so that the production cost is reduced, and the sorting quality is improved.

Description

technical field [0001] The invention relates to the technical field of fluorite mineral processing, in particular to a color separation and quality improvement-tailing pre-selection method for fluorite lean ore. Background technique [0002] Fluorite is one of my country's important strategic non-metallic minerals, known as the "second rare earth". my country is rich in fluorite resources, but the average grade is low, and most of them are associated fluorite mines, so it is difficult to sort and recover. Fluorite minerals are low in hardness and brittle, and have a large difference in hardness from gangue minerals such as silicates, and are prone to overgrinding and muddying, which is an important reason why it is difficult to obtain high-quality fluorite concentrates. At present, the main beneficiation methods of fluorite ore are hand selection, gravity separation and flotation. Hand selection is generally used for fluorite mines with clear boundaries between fluorite an...

Claims

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Application Information

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IPC IPC(8): B03B7/00
CPCB03B7/00
Inventor 谭琦刘磊
Owner ZHENGZHOU MINERALS COMPOSITIVE UTILIZATION RES INST CHINESE GEOLOGICAL ACAD
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