Spent Nitric Acid Solution Reusing Equipment

1. obtain high purity copper plates 2. 70% of spent nitric acid solution can be reused

1.  Technical Introduction

Spent nitric acid solution contains high concentration of nitric acid and it’s not convenient for direct electro-deposition treatment. Conventional method is precipitation. Our self-developed equipment can electro-deposit the solution directly, extract copper from solution and reuse the treated solution.

2.  Application Scope

It is applied to spent nitric acid solution produced by PCB plants.

3.  Equipment Introduction 

3.1  Work Flow

We recover nitric acid by electrolysis-recovery method. The spent solution is reused in dip tank after copper recovering. 

 

                                 

3.2  Specifications

Spent electro-deposition solution

High purity electrodeposited copper solution

Model	RCN-100	RCN-200	RCN-500	RCN-1000
Capacity(L/D)	100	200	500	1000
Power (kw)	3	6	10	15
Floor Space (m2)	4	8	15	30
Operator(s)	1	1	2	3
Electricity Consumption(kw.h/t)	3500~4000
Reuse Rate	70%
Copper Recovery Rate	99%

4. Environmental Protection Standards

4.1  Exhaust gas emission reaches National Environmental Protection Standards: exhaust gas is discharged after treatment, no odor.

4.2  30% of spent electro-deposition solution is discharged after being treated by wastewater treatment station.

5. Features and Advantages

5.1  Direct electro-deposition to obtain high purity copper plates.

5.2  70% of spent nitric acid solution can be reused after adjustment which not only reduce the chemical cost, but also lower the difficulty on wastewater treatment.

Spent Nitric Acid Solution Reusing Equipment