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Method and device for separating gold slice and solid fragment

A technology of gold and flakes, applied in the field of separating gold flakes and solid fragments, can solve the problems of serious pollution of aqua regia, highly toxic cyanide solution, complicated process, etc., and achieve the effect of fast recovery, simple equipment and high purity

Inactive Publication Date: 2008-07-23
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have many disadvantages, such as: highly toxic cyanide solution, serious pollution of aqua regia, low recovery rate, low purity, complicated process, high cost and large investment, etc.

Method used

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  • Method and device for separating gold slice and solid fragment
  • Method and device for separating gold slice and solid fragment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The scraps of gold-plated parts for electrical connectors and the leftovers produced in the production are made of resin composite boards. They are heated in nitric acid solution to make the gold flakes and resin composite board fragments fall off, and the mixture of gold flakes and resin composite board fragments is put into the 1, pour water into the transparent container, and stir again. When the stirring is stopped, it can be seen that the sedimentation speed of the gold flakes is slower than that of the matrix, and the solid fragments quickly sink to the bottom of the container, while the gold flakes are suspended in the water and gradually sink. At this time, open the side of the container If there is a jacket on the wall, the gold flakes flow out from the holes on the side wall of the container with water, and the solid fragments remain in the container; if a small amount of gold flakes remain in the container, they can be separated by repeated flushing. This meth...

Embodiment 2

[0033]The main board of the waste mobile phone and computer is broken into small pieces, and the gold foil on the surface of the waste material and the substrate are separated by adding nitric acid solution, and the mixture of the broken main board and the gold flake is filtered out, and the mixture of the gold flake and the main board fragment is put into the transparent container shown in Figure 1 , flush into water, and stir again. When the stirring is stopped, it can be seen that the settling speed of the gold flakes is slower than that of the matrix, and the solid fragments quickly sink to the bottom of the container, while the gold flakes are suspended in the water and gradually sink. At this time, open the jacket on the side wall of the container. Then the gold flakes flow out from the hole on the side wall of the container with water, and the solid fragments remain in the container; if a small amount of gold flakes still remain in the container, they can be separated by ...

Embodiment 3

[0035] Add the waste gold-plated circuit board into the nitric acid solution, after the gold foil on the surface of the waste material and the substrate fall off, filter out the mixture of the circuit board and the gold flakes, put the mixture of the gold flakes and the circuit board fragments into the transparent container shown in Figure 1, rinse Pour into water and stir again. When the stirring is stopped, it can be seen that the sedimentation speed of the gold flakes is slower than that of the matrix, and the solid fragments quickly sink to the bottom of the container, while the gold flakes are suspended in the water and gradually sink. At this time, the jacket on the side wall of the container is opened, and the gold The flakes flow out with the water from the hole on the side wall of the container, and the solid fragments remain in the container; if a small amount of gold flakes remain in the container, they can be separated by repeated flushing. This method utilizes the ...

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Abstract

The invention discloses a method and device used for detaching gold flakes and solid fragments, which is characterized in that: a transparent container is arranged in a sink, and a through hole is arranged on the cylindrical surface of the same circumference at the centre of the transparent container, and the outside of the through hole is sealed by a detachable jacket; a blender and a water pipe are respectively arranged on a support, and the stirring paddle at the lower end of the stirring paddle shaft is extended into the transparent container, and the water pipe is aligned with the upward side of the transparent container; the blending of gold flakes and solid fragments is put into the container, after adding water and stirring, the slip velocity of the gold flakes is slower than the substrate, and the solid fragments quickly sink at the bottom of the container, and the gold flakes are suspended in water and sink gradually; temporality by unclosing the jacket of the container sidewall, the gold flakes effuse from the hole of the container sidewall along with the water and enter the sink, and the solid fragments are left in the transparent container, and then the detaching object is achieved. The method and device used for detaching gold flakes and solid fragments has an advantage of detaching all type of gold flakes and solid fragments.

Description

technical field [0001] The present invention relates to a method and device for separating gold flakes and solid fragments. Background technique [0002] Gold is a good conductor of electricity, never rusts, and has very good processing properties. In computers, mobile phones and other electrical products that pursue miniaturization, gold is an indispensable material for electronic circuits. Out of resource utilization and environmental protection needs, communication product factories have introduced special dismantling equipment to select gold-containing components from dismantled old computers, mobile phones and other spare parts. In recent years, the elimination of old computers, mobile phones and other electrical products has accelerated dramatically. Developed countries have to recover a large amount of gold and silver from secondary resources every year. According to statistics, it costs US$250-300 to mine 1 ounce of gold, and only US$100 to recover 1 ounce of gold...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00B03B5/00
CPCY02P10/20
Inventor 陈建军
Owner ZHEJIANG SCI-TECH UNIV
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