Spent Alkaline Etchant Reclaimation and Copper Recovery Equipment

1. 100% reclamation and recovery 2. stable, easy-operating and easy-maintaining

1.  Technical Introduction

It' s an electro-deposit technique to reclaim spent alkaline etchant in PCB plants. Pumping spent alkaline etchant into electrobath and electrodepositing it to get min. 99% purity cathode copper. Electro-deposited etchant can be reused in alkaline etching machine after the etching salt and alkaline etching addictive being added. There is no waste water or drogs during the entire reclaim process.

 

2.  Application Scope

It' s applied to spent alkaline etchant reclamation and resource recovery in PCB plants.

 

3.  Equipment Introduction

3.1 Process flow

Spent Alkaline etchant is pumped to electrolytic cell from storage tank. Once cupric content is lower than 15-20 g/L, stop electro-deposition, take out cathode copper and then pump out the solution to tempering tank. Checking spent electro-deposition solution in the tempering tank and modifying the content of each component according to the testing result. The qualified etchant is back to alkaline etching machine after rechecking.

3.2 Main Specifications

Filter

Power

Etching

Mother Liquor

Circulation Cooling

Circulation Electrolysis

Mixture

Reclaimed Etching solution

Reclaimed Liquor

Etched  PC

Addtive

NH3

NH4C

Model	RAL-1000	RAL-2000	RAL-3000	RAL-4000
Capacity (L/D)	1000	2000	3000	4000
Power(kw)	25	40	55	75
Floor Space(m2)	30	60	90	120
Operator	4	6	8	10
Power consumption(kw.h/m.t.)	3500
Reuse Rate	100%
Copper Recovery Rate	100%

 4.  Environmental protection Index

4.1  Exhaust gas reaches National Environmental Protection Standards. Emitted exhaust gas has no foreign odor after being processed.

4.2  No wastewater or drogs generated and it’s zero pollution.

 

5.  Features and Advantages

5.1  The feature of this technique is to do nondestructive and selective separation to spent etchant and maintain the rest which is useful for etching for reusing.

5.2.  100% reclamation and recovery has been realized and the recycle lifespan is as long as 3 years.

5.3  This equipment adopts IEM-EC nondestructive separation technique to reclaim spent etchant. In the entire process no external material is added in, no hazardous material is generated and no break to the balance of solution. The reclaimed etchant is as good as original etchant which specifically apply to high accurate PCB production. (Such as trace width and pitch: 4mil*4mil, 3mil*3mil).

5.4.  No wastewater or drogs discharged in the whole reclaim process and every index of operation environment accord with safety standard and environmental protection demand.

5.5.  The system is stable, easy-operating and easy-maintaining. It adopts microcomputer automatic control system which reduces operation cost and stabilizes equipment operation.

Spent Alkaline Etchant Reclaimation and Copper Recovery Equipment