Beneficiation method for low-grade scheelite rich in hedenbergite and andradite

A technology of calcite and calcite, applied in chemical instruments and methods, flotation, magnetic separation, etc., can solve the difficulty in obtaining sorting indexes and economic benefits, and the difficulty in separating scheelite from gangue containing calcium , the problems of unsatisfactory production and operation benefits, etc., to improve the selection conditions and environmental impact, reduce the consumption of chemicals and production costs, reduce the amount of selection and the consumption of chemicals

Inactive Publication Date: 2017-04-26
YUNNAN TIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the collector of scheelite also collects calcium-containing gangue, it is difficult to separate scheelite from calcium-containing gangue, and it is difficult to obtain better separation indicators and econ

Method used

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  • Beneficiation method for low-grade scheelite rich in hedenbergite and andradite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The polymetallic scheelite ore containing 0.2% of tungsten, 0.07% of copper, and 55.21% of magnetic gangue minerals such as andandrite and andandrite is crushed, and the ore is ground to a fineness of r-200 mesh (-0.074 mm) accounted for 70%, and the pulp concentration was 40%. A permanent magnet wet magnetic separator is used for permanent magnet pre-selection under the magnetic field strength of 240 (mT), and the strong magnetic pyrrhotite accounting for 6-8% of the mass of scheelite ore is selected, and the impurity removal rate is 5%. Afterwards, using an electromagnetic high-gradient strong magnetic separator, under a magnetic field strength of 700 (mT), a strong magnetic tailing is used to obtain the scheelite ore, which accounts for 48.61% of the quality of the scheelite ore. Non-metallic weak magnetic products and non-magnetic products, magnetic products are discarded as tailings, the throwing yield accounts for 56.73%, the tungsten content is 0.026%, and the tu...

Embodiment 2

[0028] The polymetallic scheelite ore containing 0.14% of tungsten, 0.081% of copper, and 51.03% of magnetic gangue minerals such as andandrite and andandrite is crushed, and the ore is ground to a fineness of r-200 mesh (-0.074 mm) accounted for 70%, and the pulp concentration was 35%. A permanent magnet wet magnetic separator is used for permanent magnet pre-selection under a magnetic field strength of 300 (mT), and the strong magnetic pyrrhotite accounting for 9-10% of the mass of scheelite ore is selected, and the impurity removal rate is 8.95%. Afterwards, using an electromagnetic high-gradient strong magnetic separator, under a magnetic field strength of 800 (mT), a strong magnetic tailing is used to obtain the scheelite ore, which accounts for 49.34% of the quality of the scheelite ore. Non-metallic weak magnetic products and non-magnetic products, magnetic products are discarded as tailings, and the discarding yield accounts for 58.29%, containing 0.03% tungsten, and t...

Embodiment 3

[0032] The polymetallic scheelite ore containing 0.22% tungsten, 0.089% copper, and 66.22% magnetic gangue minerals such as andandrite and andandrite is crushed, and the ore is ground to a fineness of r-200 mesh (-0.074 mm) accounted for 70%, and the pulp concentration was 35%. A permanent magnet wet magnetic separator is used for permanent magnet pre-selection under the magnetic field strength of 400 (mT), and the strong magnetic pyrrhotite accounting for 9-10% of the mass of scheelite ore is selected, and the impurity removal rate is 9.35%. Afterwards, using an electromagnetic high-gradient strong magnetic separator, under a magnetic field strength of 1000 (mT), a strong magnetic tailing is used to obtain scheelite ore, which accounts for 50.43% of the ore quality, including andartite, andandrite, feldspar Non-metallic weak magnetic products and non-magnetic products, magnetic products are discarded as tailings, the throwing yield accounts for 59.78%, the tungsten content is...

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Abstract

The invention discloses a beneficiation method for low-grade scheelite rich in hedenbergite and andradite. The benefication method comprises the following steps of: crushing multi-metal scheelite ores which contain 0.10-0.25% of tungsten, 0.05-0.09% of copper, hedenbergite, andradite and feldspar, and performing ore grinding until a mass ratio of cores with fineness r being 200 meshes is 70-80%; performing magnetic separation and flotation, wherein magnetic separation comprises once permanent magnet pre-selection and once strong-magnet tailings discarding magnetic separation, 5-10% of strong-magnetism pyrrhotite products are produced through permanent magnet pre-selection, and 45-50% of nonmetal weak-magnetism minerals comprising hedenbergite, andradite and feldspar are selected out through strong-magnet tailings discarding magnetic separation; separating the non-magnetic products by floating, and performing mixed flotation on sulfides, producing copper concentrate and sulfur concentrate by performing reagent-removal ore grinding and copper-sulfur separation on mixed flotation foam products; and producing tungsten concentrate by performing low-grade multi-metal scheelite flotation on flotation tailings. The beneficiation method disclosed by the invention can obtain relatively good separation effect, and greatly reduces production and management cost.

Description

technical field [0001] The invention relates to the technical field of beneficiation methods, in particular to a beneficiation method for low-grade polymetallic scheelite rich in andandrite and andandrite. Background technique [0002] Most of the scheelite deposits in my country are skarn deposits, in which scheelite is often associated or symbiotic with a variety of sulfides; the useful minerals of tungsten are embedded in the ore with a finer particle size, and are mostly disseminated in the ore. Generally, scheelite minerals need to meet the ideal monomer dissociation particle size requirements, and most of them belong to the suitable particle size range of finer-grained flotation methods. Secondly, scheelite has better natural floatability, and flotation can better Low-grade scheelite is recovered, so the separation method of scheelite is usually flotation. According to different ore types, scheelite can be divided into two types: scheelite-quartz (silicate mineral) ty...

Claims

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Application Information

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IPC IPC(8): B03B9/00B03C1/00B03D1/00B03D103/02
CPCB03B9/00B03C1/00B03C1/002B03D1/00B03D2203/02
Inventor 袁经中胡真赵荣陈明波李燕华陈红兵陈敏
Owner YUNNAN TIN
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