Method for recycling gold in cyanided tailings in ramified and series flotation mode

A branched flow, cyanidation tailings technology, applied in flotation, solid separation and other directions, can solve the problems of difficulty in gold extraction by flotation of fine-grained cyanide slag, decrease in flotability, and environmental pollution, and achieve significant technical and The effect of economic benefits, improved floatability, and broad application prospects

Active Publication Date: 2015-06-24
GUIZHOU ZIJIN MINING
View PDF6 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, cyanidation tailings contain some heavy metal ions and cyanides, and their long-term storage in large quantities will pollute the environment.
In recent years, many researchers have studied gold extraction from cyanide tailings. However, due to the addition of sodium cyanide, lime, bleaching powder and other agents in the production process of cyanide slag, the surfa

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for recycling gold in cyanided tailings in ramified and series flotation mode
  • Method for recycling gold in cyanided tailings in ramified and series flotation mode
  • Method for recycling gold in cyanided tailings in ramified and series flotation mode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method for recovering gold in cyanidation tailings by branch series flotation, comprising the following steps:

[0018] The whole mud cyanidation tailings contain Au2.82g / t, carbon content 1.32%, sulfur content 0.92%, add water to adjust the slurry concentration to 20-40%, and stir continuously at normal temperature and pressure for 5-7 minutes, according to the chemical formula listed in Table 1, After stirring well, add Na 2 CO 3 , Fe 2 SO 4 Slurry pH = 7 ~ 8, pump the pretreated pulp into the stirring buffer tank, continue to stir for 15 to 20 minutes, flow into the slurry tank, add kerosene and terpineol oil, fully stir for 3 minutes, and the pulp enters the flotation machine Flotation decarbonization is carried out, and the foam product is filtered to obtain carbon-containing gold concentrate; the decarbonized pulp flows to the stirring distribution tank by itself, and the stirring distribution tank distributes the pulp evenly to the two mixing tanks. Add min...

Embodiment 2

[0021] A method for recovering gold in cyanidation tailings by branch series flotation, comprising the following steps:

[0022] A certain all-slimed cyanide tailings contains Au1.91g / t, carbon 1.15%, sulfur 0.52%, add water to adjust the slurry concentration to 20-40%, stir continuously at normal temperature and pressure for 5-7 minutes, according to the chemical formula listed in Table 1 , formula, after stirring evenly, add Na 2 CO 3 , Fe 2 SO 4 Slurry pH = 7 ~ 8, pump the pretreated pulp into the stirring buffer tank, continue to stir for 15 to 20 minutes, flow into the slurry tank, add kerosene and terpineol oil, fully stir for 4 minutes, and the pulp enters the flotation machine Flotation decarbonization is carried out, and the foam product is filtered to obtain carbon-containing gold concentrate; the decarbonized pulp flows to the stirring distribution tank by itself, and the stirring distribution tank distributes the pulp evenly to the two mixing tanks. Add mineral...

Embodiment 3

[0025] A method for recovering gold in cyanidation tailings by branch series flotation, comprising the following steps:

[0026] A certain all-slimed cyanide tailings contains Au1.42g / t, carbon 0.92%, sulfur 0.22%, add water to adjust the slurry concentration to 20-40%, stir continuously at normal temperature and pressure for 5-7 minutes, according to the chemical formula listed in Table 1 , formula, after stirring evenly, add Na 2 CO 3 , Fe 2 SO 4 Slurry pH = 7 ~ 8, pump the pretreated pulp into the stirring buffer tank, continue to stir for 15 to 20 minutes, flow into the slurry tank, add kerosene and terpineol oil, fully stir for 5 minutes, and the pulp enters the flotation machine Flotation decarbonization is carried out, and the foam product is filtered to obtain carbon-containing gold concentrate; the decarbonized pulp flows to the stirring distribution tank by itself, and the stirring distribution tank distributes the pulp evenly to the two mixing tanks. Add mineral...

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 discloses a method for recycling gold in cyanided tailings in a ramified and series flotation mode. The method includes the following steps that ore pulp pretreatment is conducted, and sodium carbonate and ferrous sulfate are used as ore pulp regulators; coal oil flotation decarbonizing is carried out; ramified pulp mixing is conducted, the decarbonized ore pulp automatically flows to a stirring and distributing groove, and the ore pulp is evenly distributed to two pulp mixing barrels for mixing pulp through the stirring and distributing groove; ramified and series flotation is performed, foam products in first rougher flotation fully enter in second rougher flotation to be subjected to flotation together with the decarbonized ore pulp, foam products in second rougher flotation undergo closed circuit concentration operation of first concentration and second concentration to obtain gold concentrate, and no drug is added in the concentration stage; products in the groove of first rougher flotation are subjected to closed circuit scavenging of first scavenging and second scavenging to obtain tailings. By the adoption of the method, the recovery rate of the gold can be improved obviously, meanwhile, drug consumption is lowered, and the cost is saved.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a method for recovering gold in cyanidation tailings by branch series flow flotation. Background technique [0002] Cyanide tailings are waste residues produced during the process of gold extraction by cyanidation of gold mines. They still contain recyclable gold, and the gold content is generally above 1g / t. It is a secondary resource. At the same time, cyanidation tailings contain some heavy metal ions and cyanides, and their long-term storage in large quantities will pollute the environment. In recent years, many researchers have studied gold extraction from cyanide tailings. However, due to the addition of sodium cyanide, lime, bleaching powder and other agents in the production process of cyanide slag, the surface properties of minerals will change after long-term cyanide treatment. In particular, gold-bearing pyrite and other gold-bearing sulfides are easily oxi...

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): B03D1/00B03D1/002B03D101/00
Inventor 傅飞龙
Owner GUIZHOU ZIJIN MINING
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap