Method for extracting metal copper using microbe and its use

Abstract

The present invention discloses microbe extracting method of metal copper and its application. The method includes crushing copper connecting material into powder; soaking the powder in culture liquid containing microbe to leach out for 15-60 days; solid-liquid separating to obtain leach solution and extracting with copper extractant; reverse extracting copper from the copper extracting liquid with reverse extractant; and final electrolyzing the copper containing reverse extracting liquid to obtain metal copper. The said method may be used in extracting metal copper from printed circuit board. The method has high economic benefit and environment benefit.

Description

technical field

[0001] The invention belongs to microbial hydrometallurgy technology, and relates to a method for extracting metallic copper from microorganisms, and also relates to the application of the method in extracting metallic copper of printed circuit boards. Background technique

[0002] Bacterial metallurgy, also known as microbial leaching, is a new technology in the modern hydrometallurgical industry. It is mainly a metallurgical method that uses bacterial method to dissolve lean ore, waste ore, tailings and Daye slag to recover some precious non-ferrous metals and rare metals, so as to prevent the loss of mineral resources and maximize the use of ore deposits.

[0003] Bacterial metallurgy began in 1974, when American scientists Colmer and Hinkle isolated a strain of Ferrooxidans (Thiobacillus ferrooxidans) from acidic mine water. Since then, Brino and others in the United States have isolated Thiobacillus thiooxidans (T.thiooxidans) and Thiobacillus ferrooxid...