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Preparation method and equipment with low waste liquid discharge and used for silver-coated copper powder

A waste liquid discharge, silver-coated copper powder technology, applied in metal processing equipment, transportation and packaging, coating, etc., can solve the problems of material waste, low production efficiency, environmental pollution, etc., to reduce copper loss and improve production Efficiency, the effect of simple preparation process

Active Publication Date: 2018-12-07
深圳市绚图新材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of low production efficiency, material waste and environmental pollution in the existing silver-coated copper preparation process, the present invention proposes a preparation method and equipment for silver-coated copper powder that can realize industrial production and low waste liquid discharge

Method used

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  • Preparation method and equipment with low waste liquid discharge and used for silver-coated copper powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step 1: Pickling of flake copper powder

[0025] Add 0.35kg of concentrated sulfuric acid into 150kg of deionized water to form a dilute sulfuric acid solution. The prepared dilute sulfuric acid solution is fed into the pickling tank 2 through the liquid inlet 8 .

[0026] Put 70kg of flaky copper powder into the pickling tank 2, and stir for 20 minutes at a speed of 200-400rmp using a double paddle stirrer 10. Open the discharge port 9 of the pickling pool 2 to discharge the waste acid solution.

[0027] Close the drain port 9, open the liquid inlet port 8, and rinse the residual acid solution on the flake copper powder with deionized water. Then make the deionized water submerge the flake copper powder, stir at a speed of 200-400rmp for 10 minutes, open the drain port 9, and discharge the cleaning wastewater.

[0028] Step 2: Kneading flake copper powder

[0029] Dissolve 47kg of silver nitrate in 40kg of deionized water, add 42kg of ammonia water to make the solu...

Embodiment 2

[0038] Step 1: Pickling of flake copper powder

[0039] Add 0.4kg of concentrated sulfuric acid into 200kg of deionized water to form a dilute sulfuric acid solution. The prepared dilute sulfuric acid solution is fed into the pickling tank 2 through the liquid inlet 8 .

[0040] Put 100kg of flaky copper powder into the pickling tank 2, and stir for 20 minutes at a speed of 200-400rmp using a double paddle agitator 10. Open the discharge port 9 of the pickling pool 2 to discharge the waste acid solution.

[0041] Close the drain port 9, open the liquid inlet port 8, and rinse the residual acid solution on the flake copper powder with deionized water. Then make the deionized water submerge the flake copper powder, stir at a speed of 200-400rmp for 10 minutes, open the drain port 9, and discharge the cleaning wastewater.

[0042] Step 2: Kneading flake copper powder

[0043] Dissolve 79kg of silver nitrate in 75kg of deionized water, add 72kg of ammonia water to make the sol...

Embodiment 3

[0052] Step 1: Pickling of flake copper powder

[0053] Add 0.5kg of concentrated sulfuric acid into 230kg of deionized water to form a dilute sulfuric acid solution. The prepared dilute sulfuric acid solution is fed into the pickling tank 2 through the liquid inlet 8 .

[0054] Put 140kg of flaky copper powder into the pickling tank 2, and stir for 20 minutes at a speed of 200-400rmp using a double paddle agitator 10. Open the discharge port 9 of the pickling pool 2 to discharge the waste acid solution.

[0055] Close the drain port 9, open the liquid inlet port 8, and rinse the residual acid solution on the flake copper powder with deionized water. Then make the deionized water submerge the flake copper powder, stir at a speed of 200-400rmp for 10 minutes, open the drain port 9, and discharge the cleaning wastewater.

[0056] Step 2: Kneading flake copper powder

[0057] Dissolve 95kg of silver nitrate in 90kg of deionized water, add 88kg of ammonia water to make the sol...

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Abstract

The invention discloses a preparation method and equipment with low waste liquid discharge and used for a silver-coated copper powder. The preparation method comprises the following steps: 1. carryingout acid pickling on a flake copper powder; 2. kneading the flake copper powder to obtain a silver-coated copper paste; 3. carrying out extrusion and suction filtration on the silver-coated copper paste; and 4. drying the silver-coated copper paste subjected to the suction filtration to prepare the silver-coated copper powder. The preparation method is capable of realizing industrialized production for the silver-coated copper powder; atomization charging and kneading coating are adopted during production for the silver-coated copper powder, and the usage amount of a solvent can be reduced, so that the low waste liquid discharge is realized, and copper material loss is reduced; and the preparation process is simple, and the labor and the time are saved, so that the production efficiency is greatly increased.

Description

technical field [0001] The invention relates to a preparation process of silver-coated copper conductive powder, in particular to yet another preparation method and equipment for silver-coated copper conductive powder capable of realizing large-scale production and low waste liquid discharge. Background technique [0002] At present, the production of silver-coated copper conductive powder has basically not yet realized industrial production, that is, most of them still use reactors for small quantities of electroless plating. The production efficiency of electroless plating using a reactor is low and requires a lot of manpower and time. Due to the limited capacity of the reactor and the need to add a large amount of solution during the reaction, the amount of product produced each time is not large, and the production capacity cannot keep up. Along with the reaction, a large amount of waste liquid is produced. The waste liquid contains a certain amount of copper ions, and...

Claims

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Application Information

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IPC IPC(8): B22F1/02B22F9/24
CPCB22F9/24B22F1/17
Inventor 林海晖曹彩丹梁嘉静
Owner 深圳市绚图新材科技有限公司
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