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A kind of fluorite lean ore color separation and quality improvement-tailing pre-selection method

A technology for lean ore and fluorite, which is applied in the field of color separation and quality improvement of fluorite lean ore - tail-throwing pre-selection, which can solve the problems of low operation rate and high labor cost.

Active Publication Date: 2021-06-18
ZHENGZHOU MINERALS COMPOSITIVE UTILIZATION RES INST CHINESE GEOLOGICAL ACAD
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  • Description
  • Claims
  • Application Information

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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 fluorite lumps in advance to obtain qualified lump ore products, but the operation rate is low and the labor cost is high. Generally used as an auxiliary means for other sorting methods

Method used

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  • A kind of fluorite lean ore color separation and quality improvement-tailing pre-selection method
  • A kind of fluorite lean ore color separation and quality improvement-tailing pre-selection method
  • A kind of fluorite lean ore color separation and quality improvement-tailing pre-selection method

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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 present invention proposes a kind of fluorite lean ore color separation and quality improvement-tailing pre-selection method, comprising the following steps: (1) fluorite lean ore is broken through two sections and one closed circuit, and the broken product is -15mm; (2) the broken product After sieving, the on-sieve product and the under-sieve product are obtained. The sieve hole size is 5mm. The on-sieve product enters the first-stage color sorter for fluorite upgrading and sorting to obtain lump ore concentrate; (3) the first-stage color sorter sorts the tail The ore enters the second-stage color sorter for tailing separation to obtain lump ore tailings and lump ore; (4) the under-screen product in step (2) and the lump ore in step (3) are mixed and then ground Mine, then enters flotation. The present invention greatly reduces the amount of raw ore entering the ball mill through pre-qualification and sorting and a large number of hard minerals in advance, which not only improves the grade of selection but also weakens the over-crushing of fluorite by hard minerals during the grinding process. Thereby reducing the production cost and improving the sorting quality.

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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Patent Type & Authority Patents(China)
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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