NiMH battery packs.Introduction to vacuum distillation recovery technology of scrap nickel-cadmium batteries

An introduction to the vacuum distillation recycling technology of scrap nickel-cadmium batteries provided by electronic enthusiasts. An introduction to the vacuum distillation recycling technology of scrap nickel-cadmium batteries. Nickel-cadmium batteries have the advantages of cheap price, high capacity, good rechargeable and dischargeable performance, large instantaneous current and good safety performance. advantage. According to statistics, in 2000 the world

Introduction to vacuum distillation recovery technology of scrap nickel-cadmium batteries

Nickel-cadmium batteries have the advantages of cheap price, high capacity, good rechargeable and dischargeable performance, large instantaneous current and good safety performance. According to statistics, in 2000, the sales volume of nickel-cadmium batteries around the world was approximately 1.4 billion, with sales of US$1.4 billion. And in the next few years, nickel-cadmium batteries will still occupy an important share of the market.

China is a major producer and user of nickel-cadmium batteries. In 2000, sales of nickel-cadmium batteries increased by 30%. Such a large number of nickel-cadmium batteries not only bring convenience to people, but also create serious environmental problems. If it can be recycled, it will not only avoid environmental pollution, but also save limited resources.

This paper develops a vacuum-assisted recycling experimental device for nickel-cadmium batteries, and uses vacuum distillation and regional smelting selective recovery technology together to recycle waste nickel-cadmium batteries.

Vacuum assisted recovery system

Vacuum pyrolysis of nickel-cadmium batteries, placing the nickel-cadmium batteries into a vacuum distillation furnace

in conclusion

1) Vacuum distillation can better separate the components of nickel-cadmium batteries and obtain metallic cadmium with a purity greater than 99%.

2) The effective distillation temperature of cadmium should be selected between 573 and 1173K.

3) When the system pressure is 10pa, between 773 and 1173K, the cadmium content in the distillation residue decreases significantly when the temperature increases; when the distillation temperature is 1173K, and the pressure is reduced between 80 and 20pa, the cadmium content in the distillation residue is Downtrend.