Fluorine-removing process for zinc sulphate solution

A zinc sulfate solution and process technology, applied in the direction of zinc sulfate, etc., can solve the problems of difficult recovery of valence metals, large loss of zinc and acid, difficult to control and other problems, and achieve the effects of low operating cost, easy operation and time saving.

Inactive Publication Date: 2007-05-23
YUNNAN XIANGYUNFEILONG RESOURCES RECYCLING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the silica gel does not produce selectivity or repulsion to cations, anions, compounds, and complexes in the electrolyte, it is only simple physical adsorption. Therefore, in the process of using silica gel to remo

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Take 3000mL of a neutral leachate containing F - 274.6mg / L, containing Zn 2+ to 91.6g / L, heated to 50°C, first added Al 2 (SO 4 ) 3 12H 2 O, after being dissolved, add Na dissolved in a small amount of water 3 PO 4 12H 2 O, Al 3+ with F - The mass ratio is 6:1, PO 4 3- with F - The mass ratio of F - Precipitation occurred, vacuum filtration, and the filter residue was discarded to obtain 3100 mL of defluorinated liquid, which contained F - 118.4mg / L, containing Zn 2+ 71.3g / L, the defluorination rate is 55.4%, and the zinc loss rate is 19.6%.

Embodiment 2

[0025] Take 4000mL of a neutral leachate containing F - 274.6mg / L, containing Zn 2+ to 91.6g / L, heated to 60°C, and added Al first 2 (SO 4 ) 3 12H 2 O, after being dissolved, add Na dissolved in a small amount of water 3 PO 4 12H 2 O, Al 3+ with F - The mass ratio is 6:1, PO 4 3- with F - The mass ratio is 10:1, the control process is PH≈5, and after 70 minutes of action, the F - Precipitation occurs, vacuum filtration, and the filter residue is discarded to obtain 4080 mL of defluorinated liquid, which contains F - 105.0mg / L, containing Zn 2+ 75.0g / L, the defluorination rate is 61%, and the zinc loss rate is 16.48%.

Embodiment 3

[0027] Take 5000mL of a neutral leachate containing F - 274.6mg / L, containing Zn 2+ to 91.6g / L, heated to 70°C, first added Al 2 (SO 4 ) 3 12H 2 O, after being dissolved, add Na dissolved in a small amount of water 3 PO 4 12H 2 O, Al 3+ with F - The mass ratio is 6:1, PO 4 3- with F - The mass ratio is 10:1, the control process is PH≈5.0, and after 100 minutes of action, the F - Precipitation occurred, vacuum filtration, and the filter residue was discarded to obtain 5120 mL of defluorinated liquid, which contained F - 107.2mg / L, containing Zn 2+ 78.5g / L, the defluorination rate is 60.0%, and the zinc loss rate is 12.24%.

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PUM

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Abstract

The invention relates to the technology of removing fluorine by zinc sulphate solution, which belongs to the way of removing fluorine in the neutral extracted supernatant during the wet process of refining zinc. In the invention, after adding Al3+ and PO43- to the neutral extracted supernatant which contains fluorine, the fluorine is precipitated so it can be removed from the solution. The advantages of the invention: short technological flow-sheet, easy to operate, high fluorine-removing rate, less loss of elements with valence, more available to the cheap accessories and low operating cost.

Description

technical field [0001] The invention belongs to a method for removing fluorine in neutral leaching supernatant liquid in zinc hydrometallurgy. Background technique [0002] In zinc hydrometallurgy, the main source of fluorine is that it is brought into the leachate when dealing with fluorine-containing zinc oxide ore and sublimation fumes (hereinafter referred to as fluorine-containing materials). For this reason, when dealing with fluorine-containing materials, fluorine removal methods can generally be divided into two categories: one is defluorination from the material before leaching, and the other is defluorination from the solution after the material is leached. [0003] There are two kinds of defluorination of materials before leaching: fire method and wet method alkaline cleaning. Fire methods such as the multi-hearth furnace roasting of Zhuzhou Smelter and the rotary kiln roasting of Port Pirie, Australia, have huge equipment, high investment, high energy consumptio...

Claims

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Application Information

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IPC IPC(8): C01G9/06
Inventor 舒毓璋雷洪云
Owner YUNNAN XIANGYUNFEILONG RESOURCES RECYCLING TECH CO LTD
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