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Device and method for vacuum melting of circuit board

A vacuum smelting and circuit board technology, applied in separation methods, chemical instruments and methods, and improvement of process efficiency, can solve problems such as soil pollution, life and physical and mental health hazards, achieve less solid waste, enhance deoxidation capacity, low pollution effect

Pending Publication Date: 2020-02-21
LANZHOU KATE ENVIRONMENTAL TECH ENGCO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Waste PCBs contain heavy metals such as lead, mercury, and hexavalent chromium, as well as toxic chemicals such as polybrominated biphenyls (PBB) and polybrominated diphenyl ethers (PBDE) as flame retardant components. Groundwater and soil cause huge pollution, which brings great harm to people's life and physical and mental health

Method used

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  • Device and method for vacuum melting of circuit board
  • Device and method for vacuum melting of circuit board

Examples

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Embodiment Construction

[0026] Such as figure 1 As shown, a device for vacuum smelting circuit boards, the device includes several intermediate frequency furnaces 1 placed above the casting system 13, a sealing cover 8 placed above the intermediate frequency furnace 1, a spray device 3 and a drying device 5.

[0027] The bottoms of several intermediate frequency furnaces 1 are respectively connected to the casting system 13 through siphon U-shaped tubes 12, and the tops are respectively connected to the sealing cover 8 through vacuum pumps 9; the lower part of each intermediate frequency furnace 1 is provided with a nitrogen filling device 11, and the upper part A disc pushing device 10 is provided; the top of the sealing cover 8 is connected to the spraying device 3 and the drying device 5 in turn through the flue gas collecting pipe 2, and the end of the drying device 5 is connected to a chimney 6 through a compression pump 7.

[0028] Wherein: several nozzles 4 are evenly distributed in the sprayi...

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Abstract

The invention relates to a device for vacuum melting of a circuit board. The device comprises a plurality of intermediate frequency furnaces above a casting system, a sealing cover placed above the intermediate frequency furnaces, a spraying device and a drying device. The bottoms of the intermediate frequency furnaces are connected with the casting system through siphon U-shaped pipes correspondingly. The tops of the intermediate frequency furnaces are connected with the sealing cover through vacuum pumps correspondingly. A nitrogen charging device is arranged at the lower portion of one sideof each intermediate frequency furnace. A disc material pushing device is arranged at the upper portion of one side of each intermediate frequency furnace. The top of the sealing cover is sequentially connected with the spraying device and the drying device through smoke collecting pipelines. The tail end of the drying device is connected with a chimney through a compression pump. Meanwhile, theinvention further discloses a method for vacuum melting of the circuit board. The device and method are simple in process, easy to operate and low in device investment and operation cost and have theadvantages of maximizing the recovery of resources and minimizing the influences on the environment.

Description

technical field [0001] The invention relates to the technical field of resource disposal of circuit boards, in particular to a device and method for vacuum smelting circuit boards. Background technique [0002] With the acceleration of electronic product renewal, the amount of discarded printed circuit boards (PCBs), which are the main components of e-waste, is also increasing. The environmental pollution caused by waste PCBs has also attracted the attention of various countries. Waste PCBs contain heavy metals such as lead, mercury, and hexavalent chromium, as well as toxic chemicals such as polybrominated biphenyls (PBB) and polybrominated diphenyl ethers (PBDE) as flame retardant components. Groundwater and soil have caused huge pollution, which has brought great harm to people's life and physical and mental health. On the waste PCB, there are nearly 20 kinds of non-ferrous metals and rare metals, which have high recovery value and economic value. . [0003] At presen...

Claims

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Application Information

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IPC IPC(8): C22B7/00B01D53/78B01D53/68B01D53/28F27D17/00
CPCB01D53/28B01D53/68B01D53/78B01D2251/304B01D2251/604C22B7/001F27D17/008Y02P10/20
Inventor 李忠国
Owner LANZHOU KATE ENVIRONMENTAL TECH ENGCO LTD