Method for separating scheelite from fluorite

A scheelite and fluorite technology, which is applied in solid separation, wet separation, chemical instruments and methods, etc., can solve the problems of excessive residual chemicals on the surface, high energy consumption of full flotation, and environmental impact of chemicals, and achieve good application. and promotion prospects, effective use of mineral resources, and the effect of less consumption of chemicals

Inactive Publication Date: 2011-02-23
YUNNAN TIN GROUP HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the tungsten sub-concentrate is a product produced by flotation and other processes, there are many residual chemicals on the surface, which brings great difficulties to drug removal and flotation, and will consume a large amount of water glass and inhibitors. On the other hand, the energy consumption of full flotation is high, which increases the cost of mineral processing; and the chemicals have a certain impact on the environment

Method used

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  • Method for separating scheelite from fluorite
  • Method for separating scheelite from fluorite

Examples

Experimental program
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Effect test

Embodiment 1

[0013] Example 1:

[0014] Raw materials contain WO 3 46.96%, Ca23.30%, F12.53%, after two stages of shaker separation, the output contains WO 3 71.70%, F1.29% super-grade scheelite concentrate, the recovery rate of tungsten is 80.5%, and the removal rate of fluorine is 95.02%. The tailings in the shaker are added with 100 kg of water glass and 10 kg of TN per ton of raw materials. After concentration, Warm and stir for 1 hour, dilute to 25% by mass, adjust the pH of the slurry to 9, add 500 grams of inhibitor KJ per ton of raw materials, add 500 grams of collector YY, and go through primary roughing and secondary sweeping , one selection, the output contains WO 3 65.5% scheelite concentrate, flotation tailings further flotation output containing CaF 2 85.09% fluorite powder mineral products. The recovery rate of tungsten in the whole process reaches 95.78%, and the removal rate of fluorine in scheelite concentrate is 90.30%.

Embodiment 2

[0016] Raw materials contain WO 3 48.79%, Ca22.76%, F12.04%, after two stages of shaker separation, the output contains WO 3 72.68%, F1.23% super-grade scheelite concentrate, the recovery rate of tungsten is 82.0%, and the removal rate of fluorine is 96.45%. The tailings in the shaker are added with 90 kg of water glass and 8 kg of TN per ton of raw materials. After concentration, Warm and stir for 1 hour, dilute to 25% by mass, adjust the pH of the pulp to 10, add 400 grams of inhibitor KJ per ton of raw materials, add 400 grams of collector YY, and go through primary roughing and secondary sweeping , one selection, the output contains WO 3 66.64% scheelite concentrate, flotation tailings further flotation output containing CaF 2 86.32% fluorite powder ore products. The recovery rate of tungsten in the whole process reaches 96.34%, and the removal rate of fluorine in scheelite concentrate is 91.55%.

Embodiment 3

[0018] Raw materials contain WO 3 34.13%, Ca25.97%, F25.53%, after two stages of shaker separation, the output contains WO 3 70.36%, F1.62% super-grade scheelite concentrate, the recovery rate of tungsten is 81.78%, and the removal rate of fluorine is 93.34%. The tailings in the shaker are added with 120 kg of water glass and 12 kg of TN per ton of raw materials. Warm and stir for 1 hour, dilute to a concentration of 25% by mass, adjust the pH of the pulp to 9.5, add 800 grams of inhibitor KJ per ton of raw materials, and add 300 grams of collector YY. Second selection, the output includes WO 3 65.54% scheelite concentrate, flotation tailings further flotation output containing CaF 2 88.54% fluorite powder ore products. The recovery rate of tungsten in the whole process reaches 94.33%, and the removal rate of fluorine in scheelite concentrate is 89.76%.

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Abstract

The invention relates to a method for separating scheelite from fluorite and belongs to the technical field of mineral dressing of metal mines. The method comprises the following steps of: preparing ore pulp from tungsten secondary concentrate ore containing 30 to 60 weight percent of tungsten trioxide; carrying out two stages of separation by adopting shaking tables; then making middlings of a first-stage shaking table enter a second-stage shaking table to be separated so as to produce special grade white tungsten concentrate ore products containing over 70 weight percent of tungsten trioxide; concentrating the middlings and tailings, which are separated by the shaking tables, to 50 to 60 weight percent in a centralizing mode, then adding water glass and TN into the concentrated middlings and tailings, and uniformly stirring the mixture in a stirring barrel for flotation; diluting flotation pulp to 20 to 30 weight percent, regulating the pH of the diluted flotation pulp to 9 to 10, and adding an inhibitor KJ and a collector YY to produce white tungsten concentrate ore containing over 65 weight percent of tungsten trioxide; and further carrying out flotation on the flotation tailings to obtain fluorite powder ore containing over 85 percent of calcium fluoride. The method has the advantages of high mineral dressing index, simple process, low production cost, environmental protection and capability of better solving the environmental problems of ammonium paratungstate manufacturing enterprises, which are caused by high fluorine content of raw materials.

Description

technical field [0001] The invention relates to a method for separating scheelite and fluorite, and belongs to the technical field of metal ore dressing. Background technique [0002] Tungsten concentrate is the main raw material for the production of ammonium paratungstate. Since tungsten ore often coexists with calcium-containing minerals such as fluorspar, in the process of beneficiation of tungsten ore, its concentrate products often contain different amounts of calcium-containing minerals such as fluorspar. Due to the differences in the technical level of tungsten ore beneficiation enterprises and the pursuit of economic interests by enterprises, there are a large number of tungsten sub-concentrates containing 30% to 60% of tungsten trioxide and 20% to 55% of calcium fluoride for sale in the market, and the production of ammonium paratungstate After the enterprise purchases raw materials, it generally enters the ammonium paratungstate production process directly after ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/00B03B7/00B03B5/02
Inventor 仇云华潘基泽李伟
Owner YUNNAN TIN GROUP HLDG
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