Dielectrophoresis separation system for recycling precious metals

Abstract

The invention relates to a dielectrophoresis separation system for recycling precious metals, which comprises a mixer, a separation chamber and a collector, wherein the dielectrophoresis separation chamber is in a vertical hexagonal barrel shape; the six edges in the hexagonal barrel are respectively provided with a stainless steel sheet electrode; the center shaft in the hexagonal barrel corresponding to each stainless steel sheet electrode is evenly equipped with an insulated wire electrode; the collector is installed below the insulated wire electrodes; the lower end of the dielectrophoresis separation chamber is coaxially provided with the collector; a funnel organ is installed in the collector corresponding to the lower end of the insulated wire electrode; the funnel organ is communicated with an output pipe; and the lower bottom of the collector is provided with a cyclic outlet. The invention acquires unseparated precious metal granules in precious metal waste by utilizing the unique high selectivity and high controllability in the dielectrophoresis principle in physical chemistry to maximally recycle precious metals and minimize the possible environmental pollution caused by precious metals. The invention provides a brand new environment-friendly high-efficiency continuous separation technology for separating and recycling precious metals in tailings and waste. The invention has the advantages of environmental protection and energy saving, and is beneficial to further separation of precious metals in precious metal lean ores and tailings in China.

Description

technical field [0001] The invention belongs to the technical field of separation, and relates to the separation and extraction of precious metals such as gold, in particular to a dielectrophoresis separation system for recovering precious metals. Background technique [0002] Precious metals, such as gold, silver, platinum, etc., often remain in the tailings or garbage (such as electronic waste) in the form of tiny (diameter micron or less than micron) particles in a free state, and their concentration is very low (often less than a few hundred milligrams per t), and exist as ultra-thin flakes with non-uniform geometry and unequal size distribution. This specific existence mode cannot be effectively separated by conventional separation methods. If the separation method of the original (rich) ore is used to extract the precious metals remaining in the tailings, due to the low particle concentration, the required investment is large, the separation efficiency is low, and the ...

AI Technical Summary

Problems solved by technology

[0002] Precious metals, such as gold, silver, platinum, etc., often remain in the tailings or garbage (such as electronic waste) in the form of tiny (diameter micron or less than micron) particles in a free state, and their concentration is very low (often less than a few hundred milligrams per tons), and exist as ultra-thin flakes with uneven geometry and unequal size distribution, this specific existence cannot be effectively separated by conventional separation methods

If the separation method of the original (rich) ore is used to extract the precious metals remaining in the tailings, because the particle concentration is too low, the required investment is large, the separation efficiency is low, and the environmental pollution is serious.

Similarly, when dealing with precious metal particles contained in garbage, the chemical method commonly used in raw ore separation technology, due to the chemical reaction of chemical reagents to plastics, not only cannot separate precious metals, but also causes very bad environmental pollution

Conventional physical separation methods cannot separate such fine and ultra-thin precious metal particles

In addition, the magnetization method has also been proposed for the separation of precious metals, but its separation efficiency is too low and the degree of industrial automation is low.

[0003] Through patent search, no reports of special equipment for recovering precious metals using the principle of dielectrophoresis have been found

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