Method for recovering copper in waste circuit board

A waste circuit board and recycling method technology, which is applied in the field of copper recycling in waste circuit boards, can solve a large amount of waste water and waste gas, environmental pollution, sewage and other problems, and achieve the effect of ingenious design and avoid waste gas and waste water

Inactive Publication Date: 2019-11-26

苏州鑫达资源再生利用有限公司

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AI-Extracted Technical Summary

Problems solved by technology

[0002] As the basic components of various electrical appliances and equipment, the circuit board itself is composed of substrates and electronic components. The substrate is made of copper sheets wrapped with resin materials; at present, wet processing and direct smelting methods are usually used for recycling waste circuit boards: wet method Treatment is a separation method of crushing a...

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Method used

As one of the preferred versions of the present invention, the primary crusher and/or the secondary crusher and/or the tertiary crusher are cooled by the cold water output by the cooling water tank, and the crusher can be reduced by the cooling equipment temperature generated during operation.

The recovery method of copper in the waste circuit board provided by the present invention is ingenious in design, after the waste circuit board is repeatedly broken, and then after airflow sorting and electrostatic sorting ...

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Abstract

The invention discloses a method for recovering copper in a waste circuit board, and the method comprises the following steps of sending the waste circuit board into a vibration device to be vibrated;performing crushing by a first-stage crusher; performing crushing by a second-stage crusher; performing crushing by a third-stage crusher; sorting waste particles by an airflow sorting machine through using the characteristics of different particle proportions, sorting the high-density copper chips for storage and standby, and sending the mixed particles with low density to a pulse dust collector; pulse dust removal; sorting the mixed particles entering an electrostatic separator by the electrostatic separator through using an electrostatic separation principle, and storing the selected copper chips and resin particles separately. The method for recovering copper in the waste circuit board is cleverly designed. After crushing the waste circuit board for many times, the air flow separationand electrostatic separation are performed successively to separate resin particles from the copper, and then the problem that the existing copper recycling process generates a large amount of wastegas and waste water is avoided, therefore the method is clean and environment-friendly.

Application Domain

Gas current separationElectrostatic separation +2

Technology Topic

Specific gravityScrap +11

Image

Examples

Experimental program(1)

Example Embodiment

[0025] In the following, the present invention will be further described in detail with reference to the embodiments and drawings, so that those skilled in the art can implement it according to the text of the description.

[0026] The embodiment of the invention discloses a method for recovering copper from waste circuit boards, which includes the following steps:

[0027] Step 1): Send the waste circuit board into the vibration device for vibration, and absorb the dust generated in the vibration device through the dust collector connected with the vibration device; through the vibration mode, the dirt on the waste circuit board can be removed from the waste The circuit board is shaken down, and then the dust generated by the vibration can be sucked out by the dust collector, which can reduce the dirt in the waste circuit board and prepare for the following process;

[0028] Step 2): Send the waste circuit boards in step 1) to the primary crusher for crushing. The primary crusher crushes the waste circuit boards into 35-50m scrap pieces, and then transports them to the secondary crusher for crushing. ;

[0029] Step 3): After the second-level crusher crushes the waste blocks that enter it into 5-10mm-size waste blocks, they are sent to the third-level crusher;

[0030] Step 4): The three-stage crusher crushes the waste material that enters into it into waste particles with a diameter of less than 3mm, and sends them to the air separator;

[0031] Step 5): The air-flow sorter uses the characteristics of different particle specific gravity to sort waste particles, sorts out the dense copper scraps for storage, and transports the mixed particles with low density to the pulse dust collector;

[0032] Step 6): The pulse dust collector processes the mixed particles that enter it, collects the dust therein, and transports the remaining mixed particles to the electrostatic separator;

[0033] Step 7): The electrostatic sorter uses the principle of electrostatic sorting to sort the mixed particles that enter it, and store the sorted copper chips and resin particles separately.

[0034] As one of the preferred solutions of the present invention, waste circuit boards are fed into the primary crusher through a conveyor belt.

[0035] As one of the preferred solutions of the present invention, the secondary crusher is arranged below the primary crusher, and the waste blocks freely fall into the primary crusher from the lower opening of the secondary crusher.

[0036] As one of the preferred solutions of the present invention, the outlet of the air separator for releasing mixed particles is connected with the inlet of the pulse dust collector.

[0037] As one of the preferred solutions of the present invention, the mixed particles after being dust-removed by the pulse dust collector are transported to the electrostatic separator through a conveyor and a hoist.

[0038] As one of the preferred solutions of the present invention, the primary crusher and/or the secondary crusher and/or the tertiary crusher are cooled by cold water output from the cooling water tank, and the cooling equipment can reduce the production of the crusher during operation. temperature.

[0039] As one of the preferred solutions of the present invention, the vibration device is provided with a stirring mechanism for stirring the circuit board. The stirring mechanism can make the vibration more sufficient and improve the efficiency of removing dirt.

[0040] As one of the preferred solutions of the present invention, a heating process is provided between the step 1) and step 2), and the heating process includes sending the waste circuit board in the step 1) into a heating device for heating treatment, and then The heat-treated waste circuit boards are sent to the first-stage crusher for crushing, and the heating temperature is 100°-200°. The heating device can make the product between the waste circuit board and the copper slightly split, which facilitates the subsequent crushing work and makes the crushing work easier.

[0041] The method for recovering copper in waste circuit boards provided by the present invention is cleverly designed. After the waste circuit boards are crushed for many times, airflow sorting and electrostatic sorting are carried out in sequence, thereby separating the resin particles from the copper and avoiding The existing copper recycling process generates a large amount of waste gas and waste water, so it is clean and environmentally friendly.

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Description & Claims & Application Information

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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