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PCB (Printed Circuit Board) base material produced by mixed waste and preparation method thereof

A technology for PCB boards and waste materials, which is applied in the direction of improving process efficiency, etc., to achieve the effects of improving comprehensive utilization, uniform surface color, and wide range

Inactive Publication Date: 2012-10-03
江阴新仁铝业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this scheme directly violates the purpose of preparing conventional aluminum sheet, strip and foil products with lower raw material costs and operating expenses. Therefore, it is necessary to provide a method to prepare conventional aluminum sheet, strip and foil products with mixed waste

Method used

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  • PCB (Printed Circuit Board) base material produced by mixed waste and preparation method thereof

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preparation example Construction

[0023] A preparation method for producing PCB board substrates from mixed waste materials, the features are as follows: the PCB board substrate is high in iron and silicon, its Fe: Si is between 1.08 and 1.39, and the content of trace elements Mn and Zn exceeds 0.1%, The 0.1~0.2mm PCB board substrate alloy element mass fraction is mainly composed of the following table, and its process is as follows:

[0024] 1. The chemical composition is described in the table below:

[0025] 2. The production process of casting and rolling coils is: waste recycling → alloy grouping → charge preparation → furnace loading → melting → stirring and slag removal → composition adjustment → furnace treatment (primary refining) → converter and standing (secondary refining) → Degassing and slag removal in the degassing box → Filtration and slag removal by double-channel and double-stage ceramic filter plates in the filter box → Casting and rolling into 6.0-7.5mm cast-rolled plates.

[0026]The wa...

Embodiment 1

[0042] 1. The chemical composition ratio of the material is described in the following table:

[0043] 2. The production process of casting and rolling coils is: waste recycling → alloy grouping → charge preparation → furnace loading (18 tons) → melting (melt temperature 720°C) → stirring and slag removal (melt temperature 740°C) → composition adjustment (melt temperature 730°C)→in-furnace treatment (melt temperature 750°C for primary nitrogen spraying refining)→converter and standing (melt temperature 740°C for secondary nitrogen refining)→degassing box degassing and slag removal ( Melt temperature 730°C)→filter box dual-channel double-stage ceramic filter plate to filter and remove slag (upper layer 30ppi, lower layer 60ppi, melt temperature 720°C)→casting and rolling into 6.7mm cast rolling plate (melt continuous casting and rolling temperature 690°C).

[0044] Among them, 1XXX series pure aluminum group and 8XXX series iron-silicon-containing gold waste are used in the ...

Embodiment 2

[0051] 1. The chemical composition ratio of the material is described in the following table:

[0052] 2. The production process of casting and rolling coils is: waste recycling → alloy grouping → charge preparation → furnace loading (18 tons) → melting (melt temperature 720°C) → stirring and slag removal (melt temperature 740°C) → composition adjustment (melt temperature 730°C)→in-furnace treatment (melt temperature 750°C for primary nitrogen spraying refining)→converter and standing (melt temperature 740°C for secondary nitrogen refining)→degassing box degassing and slag removal ( Melt temperature 730°C)→filter box dual-channel double-stage ceramic filter plate to filter and remove slag (upper layer 30ppi, lower layer 60ppi, melt temperature 720°C)→casting and rolling into 7.2mm cast rolling plate (melt continuous casting and rolling temperature 700°C).

[0053] Among them, the waste in the furnace charge preparation uses 8XXX series alloy waste containing iron, silicon a...

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Abstract

The invention relates to a PCB (Printed Circuit Board) base material produced by mixed waste and a preparation method thereof. The PCB base material is characterized in that the PCB base material contains high ferrum and high silicon, wherein the ratio of Fe to Si is 1.08-1.39; and the content of trace elements Mn and Zn exceeds 0.1%. The preparation method comprises the following process flows: recovering waste; grouping alloy; preparing furnace charge; charging; melting; stirring and drossing; adjusting ingredients; refining for the first time; refining and processing for the second time; degassing and drossing in a degassing box; filtering and deslagging; casting into a casting plate with the thickness of 6.0-7.5mm; carrying out cold rolling until the the casting plate is 2.8-3.3mm; carrying out intermediate annealing according to 550DEG C / 10h; carrying out cold rolling to 0.8mm; trimming by a reeling machine; cold rolling until the casting plate is 0.38mm; and rolling into the finished product with the thickness of 0.1-0.2mm by a foil roll. The PCB base material has the advantages of clean surface, even color, no scratches, creases, bumping and the like, and stable quality.

Description

technical field [0001] The invention relates to a PCB base material produced from mixed waste and a preparation method thereof, belonging to the technical field of aluminum processing. Background technique [0002] During the production process of aluminum sheet and aluminum foil products, scraps are inevitably generated due to edge trimming, broken strips, and unequal bottoming. If they are not processed or processed too slowly, the resulting accumulation will not only seriously affect the cleanliness of the site environment, but also for the factory. The implementation of 5S and ERP management is unfavorable. Therefore, higher requirements are put forward for the management of waste materials, that is, the storage time is short, the cycle of returning to the furnace is fast, and the waste baskets are released as soon as possible to collect waste materials in time, so as to reduce the excessive occupation of workshop space by waste materials and waste baskets. Therefore, i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00
CPCY02P10/20
Inventor 吴丹彭映平黄善球朱东年王民生
Owner 江阴新仁铝业科技有限公司