岩石样品破碎新方法——SelFrag高压脉冲破碎仪

高压脉冲破碎是一项世界先进的样品破碎技术,瑞士的SelFrag A G公司利用这项技术制造出了高压脉冲破碎仪,英文名SelFrag High Voltage Pulse Fragmentor.这个仪器能产生90～200 kV的高压,然后在极短时间里通过高压工作电极放电到水中的固体样品上,这些固体样品会沿着颗粒边界、包裹体、不同物相之间裂解开来,其中岩石中的各种矿物(如锆石、磷灰石)会被完全剥离,并且保持完整的晶形.对比传统的样品破碎方法,这种高选择性的破碎方法有很多优点:容易清洗,没有交叉污染；破碎在水中进行,没有粉尘；没有噪声污染；选择性破碎,不破坏矿物晶形.目前SelFrag高压脉冲破碎仪已应用在地球科学中用于从岩石中挑选矿物,此外,它还应用在电子设备的废物回收方面.

A new fragmentation method of rock samples: SelFrag High Voltage Pulse Fragmentor

High voltage pulse fragmentation is an advanced sample comminution technology.Based on this technique,SefFrag A G Company in Switzerland manufactured a high voltage pulse fragmentation machine,called SelFrag High Voltage Pulse Fragmentor.This instrument can generate 90～200 kV high voltage,and then shortly discharge the energy from HV working electrode to solids under water.The solids will disaggregate along grain boundaries,inclusions or inhomogeneities,and the minerals such as zircon and apatite in the solid rocks will be completely liberated keeping the morphology intact.Compared with conventional mechanical methods,this highly selective fragmentation has many advantages: ① easy washing with no contamination,② working in the water with no dust,③ no loud noise,④ selective fragmentation without destroying mineral crystals.Currently,the SelFrag High Voltage Pulse Fragmentor is applied in selecting minerals from rocks for geoscience.Besides,it is applicable to circuit waste recycle.