Ore selecting method for recovering scheelite from gneiss-type ore

A beneficiation method and gneiss technology, applied in the beneficiation field of reclaiming scheelite, can solve problems such as poor beneficiation index, difficulty in effective recovery, poor flotation performance, etc., achieve low production cost, improve beneficiation recovery rate, flotation foam clean effect

Inactive Publication Date: 2012-01-04
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the finely ground scheelite is seriously over-crushed, and the flotation performance is poor; when removing impurities such as sulfides that are easy to float, it will cause some tungsten to be lost
Therefore,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Take 1 ton of gneiss type ore, containing WO 3 0.31%, sulfur content of 1.2%; the ore is finely ground to -200 mesh, accounting for 85%, and the mass concentration of the raw ore slurry of the flotation gneiss type ore is adjusted to 42%. When roughing, the flotation gneiss type ore Adjust the pH value of the pulp with sodium hydroxide in the raw pulp to be 8-9, then add 5g of polyacrylamide with a molecular weight of 8 million units, add 500g of sulfonated sodium oleate, and add water glass 3000 with a modulus of 2.8 during selection. G, and after six times of beneficiation and two times of sweeping, scheelite concentrate is obtained, the grade of which is greater than 53%t, and the tungsten recovery rate is greater than 85%.

Embodiment 2

[0017] Take 1 ton of gneiss type ore, containing WO 3 0.2%; the ore is finely ground to -200 mesh, accounting for 88%, and the mass concentration of the flotation gneiss ore slurry is adjusted to 45%. When roughing, carbonic acid is used in the flotation gneiss ore slurry Adjust the pH of the pulp to 7-8 with sodium, then add 1g of polyacrylamide with a molecular weight of 12 million units, add 1000g of sulfonated oleic acid amide, and use an open-circuit process of one coarse, one fine and two sweeps for roughing. The conventional process flow of coarse seven fines and three sweeps of middle ore is returned in turn to obtain scheelite concentrate, the grade of which is greater than 50%t, and the tungsten recovery rate is greater than 83%.

Embodiment 3

[0019] Take 1 ton of gneiss type ore, containing WO 3 0.15%; Grind the ore to -200 mesh accounting for 92%, adjust the mass concentration of the flotation gneiss ore slurry to 25%, and use hydrogen in the flotation gneiss ore slurry Adjust the pH of the pulp to 8-9 with sodium oxide, add 3g of polyacrylamide with a molecular weight of 9 million units, add 800g of sulfonated sodium oleate, and then after conventional selection and sweeping, scheelite concentrate is obtained. Its grade is greater than 50%t, and the tungsten recovery rate is greater than 90%.

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Abstract

The invention provides an ore selecting method for recovering a scheelite from a gneiss-type ore. the flotation process is used, the method comprises the steps of ore grinding, roughing separation, fine separation and scavenging and is characterized in comprising the following specific steps of: regulating a PH (Potential of Hydrogen) value of ore pulp to 7-9 by using a regulation agent in floatation gneiss-type ore raw pulp of which the mass concentration is 25-60 percent when the roughing separation is performed, and then adding polyacrylamide according to 0.01-0.05 percent of an ore solid mass in the ore pulp and adding sulfoleate according to 2-10 percent of the solid mass in the ore pulp; and obtaining an ore concentrate of the scheelite after performing the fine separation and the scavenging. According to the method provided by the invention, only the polyacrylamide and the sulfoleate are added in the traditional flotation pulp-mixing process without changing the traditional flotation process flow; the operation is convenience; the production cost is low; the ore selecting recovery rate and the ore concentrate grade are high; and the total recovery rate is over 85 percent.

Description

Technical field [0001] The invention relates to a beneficiation method for recovering scheelite from gneiss type ore, and belongs to the technical field of beneficiation. Background technique [0002] The gneiss ore type is the main geological deposit type of scheelite in nature. In this type of ore, the size of the scheelite is generally very fine, and it is accompanied by impurity minerals such as sulfide and tourmaline. This type of ore is often sorted by flotation method. When sorting, the process requires fine grinding to dissociate the scheelite monomer, and the easy-floating sulfide and other impurities must be removed first to ensure the final tungsten concentrate. The grade of the mine. However, the finely ground scheelite is more severely pulverized, and the flotation performance is poor; the removal of easily floating sulfides and other impurities will cause part of the tungsten to be lost. Therefore, using conventional scheelite flotation methods to recover scheelit...

Claims

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Application Information

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IPC IPC(8): B03D1/012B03B1/04B03D101/02B03D103/02
Inventor 刘全军李晓明
Owner KUNMING UNIV OF SCI & TECH
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