Technological method for recovering germanium from low-concentration germanium-containing waste liquid

A process method and low-concentration technology, applied in the field of germanium recycling, can solve the problems of large processing capacity, high processing cost, and the recovery rate is difficult to exceed 95%, and achieve low recovery efficiency, high recovery cost, and reduced waste liquid volume. Effect

Inactive Publication Date: 2017-05-31
YUNNAN LINCANG XINYUAN GERMANIUM IND +1
View PDF3 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the recovery rate of the above-mentioned methods for recovering germanium from high-concentration germanium waste liquid is difficult to break through 95%, and the germanium content in the discharged waste liquid still exceeds 50 mg/L, so it is also necessary to recycle this type of waste liquid
However, germanium-containing waste liquids with a germanium-containing concentration of less than 30 mg/L have a large amount of treatment and high pro

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
  • Technological method for recovering germanium from low-concentration germanium-containing waste liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1: The process for recovering germanium from low-concentration germanium-containing waste liquid is implemented according to the following steps:

[0014] (1) Transfer a total of 30 tons of low-concentration germanium-containing waste liquid produced during the germanium smelting and production process, containing 40.0mg / L germanium, to the distillation kettle in 6 batches;

[0015] (2) Turn on the heating steam to heat and distill the low-concentration germanium-containing waste liquid at a distillation temperature of 115 ℃; at the same time, cool the germanium tetrachloride and hydrogen chloride gas produced by the distillation;

[0016] (3) The gas from the cooling device adopts hydrochloric acid solution to absorb germanium tetrachloride and hydrogen chloride gas in reverse;

[0017] (4) The recovered germanium-containing acid solution is gradually transferred to the germanium concentrate chlorination distillation unit, and used together with new hydrochloric acid to...

Embodiment 2

[0019] Embodiment 2: The process for recovering germanium from low-concentration germanium-containing waste liquid is implemented according to the following steps:

[0020] (1) A total of 60 tons of low-concentration germanium-containing waste liquid produced during the company's germanium smelting and production process, containing 30.0 mg / L germanium, was transferred to the still in 10 batches;

[0021] (2) Turn on the heating steam to heat and distill the low-concentration germanium-containing waste liquid at a distillation temperature of 120 ℃; at the same time, cool the germanium tetrachloride and hydrogen chloride gas produced by the distillation;

[0022] (3) The gas from the cooling device adopts hydrochloric acid solution to reversely absorb germanium tetrachloride and hydrogen chloride gas;

[0023] (4) The recovered germanium-containing acid solution is gradually transferred to the germanium concentrate chlorination distillation unit, and used together with new hydrochloric ...

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 field of hydrometallurgy, in particular to a technological method for recovering germanium from low-concentration germanium-containing waste liquid. The method comprises the following steps that reacted acid generated through chloridizing distillation of the low-concentration germanium-containing waste liquid and germanium concentrate is combined into a distillation still, the germanium-containing waste liquid is subjected to heating distillation, the temperature of heating distillation is 110-120 DEG C, distilled germanium tetrachloride and hydrogen chloride are cooled firstly and then subjected to reverse absorption through hydrochloric acid, recovered germanium-containing acid liquid is transferred to a germanium concentrate chloridizing distillation working section, and the recovered germanium-containing acid liquid and the newly added hydrochloric acid are used for extracting germanium in the germanium concentrate through chloridizing distillation. By adopting the technological method, 90% of germanium in the germanium-containing waste liquid can be effectively recovered in an energy-saving mode, the using amount of new hydrochloric acid can be reduced by 80% or more by the germanium concentrate chloridizing distillation working section, germanium metal recovered each year can reach 500-1200 kg, and wastewater processing and discharging can be reduced by 90% or more. The efficient recovery of germanium is achieved, and circulation recycling of the hydrochloric acid is also achieved.

Description

Technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a process method for recovering germanium from a low-concentration germanium-containing waste liquid. Background technique [0002] In the process of wet germanium metallurgy and production and processing, it is often accompanied by the production of waste liquid, waste slag and waste gas. The germanium-containing waste gas is generally absorbed by the absorption liquid and converted into germanium-containing waste liquid. Due to the scarcity and preciousness of germanium resources, there are proprietary germanium recovery methods for the three germanium-containing wastes. But the most difficult germanium recovery is the germanium waste liquid. The normal smelting and processing of germanium will produce a large amount of germanium-containing waste liquid, and the absorption of waste gas will also produce germanium-containing waste liquid. The wet extraction of germanium from...

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): C22B41/00C22B7/00C22B3/10C22B3/20
CPCC22B3/10C22B3/20C22B7/007C22B41/00Y02P10/20
Inventor 刘汉保柳廷龙许金斌鲍开宏董友国杨再垒普世坤范冬强罗开兴
Owner YUNNAN LINCANG XINYUAN GERMANIUM IND
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