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Method for sorting ultrafine copper sheets

A copper sheet sorting technology, which is applied in the direction of the swirling flow can reverse the axial direction of the device, swirl device, etc., can solve difficult copper sheet product customization requirements, cost increase, production cycle lengthening and other problems, Achieve the effects of shortening the production cycle, avoiding waste of raw materials, and taking into account production costs

Inactive Publication Date: 2020-04-10
JIANGSU BOQIAN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, although it is possible to control the parameters of copper flakes by changing the grinding speed and grinding time, it is difficult to realize the customization requirements of different customers for copper flake products due to the limitation of the particle size distribution of the raw material spherical copper powder. Grinding parameters can meet the differentiated needs of customers to a certain extent, but it will result in longer production cycle and higher cost

Method used

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  • Method for sorting ultrafine copper sheets
  • Method for sorting ultrafine copper sheets
  • Method for sorting ultrafine copper sheets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) The present invention uses PSD (D10: 2.3um; D50: 6.4um; D9011.6um) ultra-fine copper sheets as raw materials, which are loaded into the feeder. Among them, PSD ultra-fine copper sheet refers to the ultra-fine copper sheet with laser particle size distribution.

[0036] (2) Three cyclone classifiers are selected for classification, and three types of copper sheet products with different particle size distributions can be obtained in one classification.

[0037] (3) Choose the intake ring made of stainless steel, choose 1.3mm air hole diameter, and install it on the first cyclone classifier.

[0038] (4) On the premise of confirming that all valves in the pipeline are open, turn on the induced draft fan, and slowly adjust the induced air volume to 1000m3 / h through frequency conversion adjustment, and control the negative pressure of the system at -45kpa.

[0039] (5) After the negative pressure of the system and the induced air volume are stabilized, turn on the spee...

Embodiment 2

[0042] (1) The present invention uses PSD (D10: 2.3um; D50: 6.4um; D9011.6um) ultra-fine copper sheets as raw materials, which are loaded into the feeder.

[0043] (2) Three cyclone classifiers are selected for classification, and three types of copper sheet products with different particle size distributions can be obtained in one classification.

[0044] (3) Select the intake ring made of stainless steel, choose 2.0mm air hole diameter, and install it on the first cyclone classifier.

[0045] (4) On the premise of confirming that all valves in the pipeline are open, turn on the induced draft fan, and slowly adjust the induced air volume to 800m3 / h through frequency conversion adjustment, and control the negative pressure of the system at -40kpa.

[0046] (5) After the negative pressure of the system and the induced air volume are stable, turn on the speed control switch of the feeder, and feed the graded raw materials into the classifier, and the feeding speed is controlled ...

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Abstract

The invention discloses a sorting method of ultrafine copper sheets. The method comprises the following steps: taking PSD (D10: 1.0-5.0 [mu]m; D50: 6.0-9.0um; D90: 10.0-13.0 [mu]m) ultrafine copper sheets as raw materials; sorting the copper sheets through the multi-channel cyclone classification technology; controlling the particle size distribution and yield of products by controlling the gas flow rate and the air volume of an induced draft fan, wherein the gas flow rate is influenced by the pore diameter of a gas ring, the pore diameter of a gas hole is controlled to be 1.0-3.0 mm, and theflow of the induced draft fan is controlled to be 600-1,200 m<3> / h. Through the fine control of each operation parameter, products of different specifications can be produced through one-time operation, the customization requirements of different customers for the products are met, and the cost is saved.

Description

technical field [0001] The invention relates to the technical field of preparation of ultrafine copper flakes, in particular to a method for sorting ultrafine copper flakes. Background technique [0002] As a conductive filler, ultrafine copper powder is widely used in conductive coatings, conductive adhesives, electrode materials, etc. Compared with spherical copper powder, flake copper powder has great advantages in increasing the contact surface of powder and improving the smoothness of powder surface. Therefore, when flake copper powder is used as conductive filler, it is more conducive to the conduction and conduction of charges. Sexual improvement. With the miniaturization of electronic components, the demand for ultra-fine copper sheets is bound to become increasingly urgent. At present, the industrialized production method of copper sheet mainly uses the ball milling method. The ball milling operation is completed in the barrel of the ball mill. After the grinding ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B04C5/26
CPCB04C5/26
Inventor 蔡俊何志松孙长入单益汉
Owner JIANGSU BOQIAN NEW MATERIALS
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