Method for extracting and separating mixed metal particles in high-voltage electrostatic field

Abstract

Disclosed is a refining and selection method of the mixed metal particles in the high voltage electrostatic field which relates to the mixed metal refining and selection technical field. The invention discloses a refining and selection method, firstly, two or more than two kinds of mixed metal particles with the grain sizes of 0.1mm-3mm are selected, the high voltage direct current power supply of a small-sized high voltage purifying machine is switched on, applied voltage value UA can be selected according to parameters such as densities, radii and radii of the columnar earthing electrodes of the mixed particles, and then the mixture is sent into a feed slot, and refining and selection can be fulfilled under the function of the high voltage electrostatic field. The invention is characterized by simple structure, little energy consumption, no loss during refining, high grade of metal particle refining. The novel method for mixed metal refining is suitable for refining and selection with two or more than two kinds of mixed metals that have certain density contrasts and are particles or can be crashed to particles. The invention is mainly used in metal material recovery field such as disused car and electronic waste recovery.

Description

technical field [0001] The invention belongs to the technical field of purification and separation of mixed metals, in particular to a purification method of mixed metals in which mixed metal particles are purified and sorted in a high-voltage electrostatic field. technical background [0002] With the improvement of people's awareness of environmental protection, it is required to effectively purify and recycle mixed metal powder or mixed metal particle materials in the field of automobile scrap metal recycling, electronic waste metal recycling, mining sorting and powder metallurgy, and use the existing It is difficult to purify and recover a single metal with existing technologies. For example, after the recycling of automobile waste or electronic waste (circuit board) by physical methods (wind selection, etc.), mixed metals such as copper powder, tin balls, and aluminum balls will be produced. Similar situations have seriously affected the metal grade and affected the Th...

AI Technical Summary

Problems solved by technology

[0002] With the improvement of people's awareness of environmental protection, it is required to effectively purify and recycle mixed metal powder or mixed metal particle materials in the field of automobile scrap metal recycling, electronic waste metal recycling, mining sorting and powder metallurgy, and use existing It is difficult to purify and recover a single metal with existing technology

For example, after the recycling of automobile waste or electronic waste (circuit board) by physical methods (wind selection, etc.), mixed metals such as copper powder, tin balls, and aluminum balls will be produced. Similar situations have seriously affected the metal grade and affected the The price of copper powder, etc.

[0003] However, the current density flotation, eddy current separation, electrostatic separation and other methods are mostly used for purification and separation between metals and non-metals, and cannot be used for purification between metals.

Furthermore, it is impossible to carry out intermetallic purification of small particles (0.1mm ~ 3mm)

[0004] The method of vibration flotation is to use vibration to separate the mixed particles to achieve the purpose of purification, but the density of mixed metal particles is not much different, the operating parameters are difficult to control, and the purification effect is not good, and the grade of purified metal is low

[0005] The smelting and purification method smelts the mixed metal, removes part of the metal as slag, and purifies the rest. This purification method consumes a lot of energy, costs high, and has a lot of metal loss, so it is not suitable for small and medium-scale metal purification.

[0006] Patent Publication No. CN1071353 "Sorting Method for Selecting Specific Metals from Scrap Metals" proposes a method for purifying metals from non-metallic materials, but this method requires specific metal ore powder and water to prepare heavy liquid , high cost and water pollution, requiring complex processes such as washing and drying

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