Treatment method of cyaniding gold extraction wastewater

A treatment method and wastewater technology, applied in the field of resource utilization of hazardous waste, can solve problems such as severe equipment corrosion, incomplete cyanide oxidation, and large consumption of oxidants

Active Publication Date: 2020-10-23
KANFORT JIANGMEN ENVIRONMENTAL TECH CO LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical oxidation method has the problems of large consumption of oxidant and incomplete oxidation of cyanide
The comprehensive recovery method has problems such as the need to add a large amount of metal ions, the treatment depth of cyanide-containing wastewater is not enough, and the solid waste needs secondary treatment.
The regeneration method can effectively separate metal ions and cyanide, so as to realize the efficient recovery of cyanide, but this method severely corrodes the equipment and the heavy metal and cyanide in the treated wastewater exceed the standard and cannot meet the discharge standard

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
  • Treatment method of cyaniding gold extraction wastewater
  • Treatment method of cyaniding gold extraction wastewater
  • Treatment method of cyaniding gold extraction wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1 Effect of solid-to-liquid ratio of sodium silicate and hydrochloric acid solution on the performance of the prepared flocculant

[0021] According to the solid-to-liquid ratio of sodium silicate and hydrochloric acid solution 5:100g / mL, 7:100g / mL, 9:100g / mL, 10:100g / mL, 20:100g / mL, 30:100g / mL, 32:100g / mL Weigh sodium silicate and hydrochloric acid solution at mL, 35g / mL, and 40:100g / mL respectively, mix and stir until the sodium silicate is completely dissolved to obtain a silicon-based acid solution, wherein the mass fraction of hydrochloric acid in the hydrochloric acid solution is 10%. According to the solid-liquid ratio of aluminum chloride and cyanide gold extraction wastewater of 5:100g / mL, aluminum chloride and cyanide gold extraction wastewater were weighed, mixed, and stirred until the aluminum chloride was completely dissolved to obtain cyanide gold extraction aluminum-containing wastewater. Measure the silicon-based acid solution and the aluminum-co...

Embodiment 2

[0030] Example 2 Effect of solid-liquid ratio of aluminum chloride and cyanidation gold extraction wastewater on the performance of the prepared flocculant

[0031] Take sodium silicate and hydrochloric acid solution respectively according to the solid-to-liquid ratio of sodium silicate and hydrochloric acid solution 30:100g / mL, mix, stir until sodium silicate dissolves completely, obtain silicic acid solution, wherein the mass fraction of hydrochloric acid in the hydrochloric acid solution is 20%. According to the solid-liquid ratio of aluminum chloride and cyanide gold extraction wastewater 2.5:100g / mL, 3.5:100g / mL, 4.5:100g / mL, 5:100g / mL, 10:100g / mL, 15:100g / mL, 15.5 : 100g / mL, 16.5: 100g / mL, 17.5: 100g / mL respectively weigh aluminum chloride and cyanide gold extraction wastewater, mix, stir until aluminum chloride is completely dissolved, and obtain cyanide gold extraction aluminum-containing wastewater. Measure the silicon-based acid solution and the aluminum-containing ...

Embodiment 3

[0036] Example 3 Effect of the volume ratio of silicon-based acid solution and aluminum-containing wastewater from cyanidation gold extraction on the performance of the prepared flocculant

[0037] Take sodium silicate and hydrochloric acid solution respectively according to the solid-to-liquid ratio of sodium silicate and hydrochloric acid solution 30:100g / mL, mix, stir until sodium silicate dissolves completely, obtain silicic acid solution, wherein the mass fraction of hydrochloric acid in the hydrochloric acid solution is 30%. According to the solid-liquid ratio of aluminum chloride and cyanide gold extraction wastewater of 15:100g / mL, aluminum chloride and cyanide gold extraction wastewater were weighed, mixed, and stirred until the aluminum chloride was completely dissolved to obtain cyanide gold extraction aluminum-containing wastewater. According to the volume ratio of silicon-based acid solution and cyanidation gold extraction aluminum-containing wastewater 0.25:1, 0....

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 treatment method of cyaniding gold extraction wastewater. The method comprises the following steps: preparing a silicon-based acid solution from sodium silicate and a hydrochloric acid solution; preparing cyaniding gold extraction aluminum-containing wastewater from aluminum chloride and cyaniding gold extraction wastewater; preparing cyaniding gold extraction silicon-aluminum-containing acidic water from the silicon-based acid solution and the cyaniding gold extraction aluminum-containing wastewater; carrying out low-temperature plasma irradiation on the cyaniding gold extraction silicon-aluminum-containing acidic water to obtain a poly-silicon-aluminum precursor solution; and carrying out low-temperature plasma irradiation on the poly-silicon-aluminum precursorsolution to obtain a silicon-based flocculant. The wastewater treatment process is simple, required raw material sources are wide, the lowest content of total cyanides in the flocculant prepared fromthe cyaniding gold extraction wastewater is only 0.04 mg / kg; meanwhile, the prepared flocculant can be suitable for a water environment with the pH value of 1-13, the heavy metal removal rate is high,99% of lead, 98% of mercury, 98% of cadmium, 99% of zinc and 99% of copper in the simulation liquid can be removed to the maximum extent, and the flocculant is particularly key for solving the problems existing in the current cyaniding gold extraction wastewater treatment process.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a treatment method for cyanidation gold extraction wastewater, and belongs to the field of resource utilization of hazardous waste. Background technique [0002] Cyanide gold extraction has the characteristics of high gold leaching rate and low equipment requirements, and is one of the most commonly used methods for gold extraction in gold mines. However, a large amount of toxic and harmful waste liquid is likely to be produced in the process of cyanidation gold extraction, which is difficult to deal with and will easily cause serious pollution to the soil and water around the mining area. Recycling within the system is currently a guiding method to reduce the environmental hazards of cyanide-containing wastewater in the process of gold mining and separation and smelting. In the short term, the internal circulation of the system can effectively avoid large-scale improper discharg...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/48C02F1/56C02F101/20C02F103/16
CPCC02F1/48C02F1/56C02F2101/20C02F2103/16
Inventor 黄涛宋东平张克骆礼兵藏颖王莹邓锦涛苏治宇
Owner KANFORT JIANGMEN ENVIRONMENTAL TECH CO LTD
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