Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF0 Cites 17 Cited by
  • 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 remove fluorine, zinc and acid loss It is relatively large, and produces a large amount of wastewater containing fluorine, chlorine, acid, and zinc at the same time, which is difficult to treat and difficult to recover valuable metals

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

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%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C01G9/06
Inventor 舒毓璋雷洪云
Owner YUNNAN XIANGYUNFEILONG RESOURCES RECYCLING TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com