Digging and separating method for placer gold and equipment thereof

Abstract

A placer gold separating method comprising subjecting placer gold- and gold ore-containing sand and gravel layers accumulated on the bottom of the water of a river and placer gold- and gold ore-containing sand and gravel layers formed deep in the ground to excavation or suction excavation by utilizing a water pressure difference, causing a mixture of the excavated or suction excavated placer gold- and gold ore-containing sand, gravel and water to flow horizontally by the action of a pressure fluid, and separating the placer gold and gold ores by utilizing a specific gravity difference while the mixture is flowing; and a system for this method. A placer gold mining boat used to practice this method and provided thereon with a combination of a suction excavation means, a mixture transfer means, a means for separating placer gold by utilizing a specific gravity difference, and a means for discarding the remaining mixture from which the placer gold has been separated. A placer gold separating method characterized by causing a mixture of placer gold and gold ores or pulverized gold ores and water to flow in a metallic cylinder, generating a magnetic field by a magnetic field generating means provided on an outer circumferential surface of the metallic cylinder, and magnetically depositing the placer gold in the mixture on the inner surface of the metallic cylinder, whereby the placer gold is separated.

Description

technical field [0001] The present invention relates to a method for mining placer gold and the like, and a ship for mining placer gold and the like used in the method. The method attracts and excavates sand beds containing placer gold or gold ore in rivers (including lakes and swamps in addition to rivers) and the like, and The difference in specific gravity is used to separate them for the purpose of mining placer gold and / or gold ore (hereinafter, in this specification, these gold deposits, or gold ore, or placer gold and gold ore are collectively referred to as "placer gold", etc.). In addition, the present invention also relates to an excavation method and system for placer gold etc., which attract and excavate sand layers containing placer gold etc. The difference is to sort the placer gold and so on. Furthermore, the present invention also relates to a method for sorting placer gold and the like and a system thereof. The purpose of this method and its system is to sep...

AI Technical Summary

Problems solved by technology

[0006] On the other hand, currently known layers containing placer gold are generally considered to be deposited at a depth of 1000m or more from the surface, but the current situation is that the limit of excavation is 5m to 20m from the surface, especially in areas with a groundwater level of 5m to 10m. Excavation of sands that exist deeper than the water table is generally considered uneconomical mining, ie waste ore

That is, there is no cost-effective excavation method and transportation method when a layer containing placer gold or the like exists at a depth of 1,000 m or more from the ground surface

[0007] And the water winnowing sorting (so-called specific gravity separation) that utilizes the specific gravity difference of placer gold etc. that carries out at present is to make placer gold etc. and water flow down together in a large area and carry out water winnowing, so separation efficiency is poor, in order to separate, not only need It has a large area and the placer gold obtained by using specific gravity must be collected manually, so there is a problem that many people are required for mass production, which is one of the reasons for the high cost of gold mining

In addition, since the current water separation is based on specific gravity separation, it adopts the method of natural flow down (using the drop), and the forced flow of a large amount of water by pumps has not yet been proposed.

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