2 layer double frequency sieve, 5. Sieve plate mainly used grizzly, comb, round steel welding, steel punching and so on. Advantage of Mining two layer double frequency vibrating screening machine for crushing line: 1. The most advanced sieve concept, unique sieve structure. A. By segmentHigh, · High frequency vibrating screens are the most important screening machines primarily utilised in the mineral processing industry. They are used to separate feeds containing solid and crushed ores down to approximately 200μm in size, and are applicable to both perfectly wetted and dried feed.