Jig is one of the relative new methods for gravity concentration. as a rougher or cleaner device, it is widely applied on the separation of gold, tin, tungsten, titanium, hematite, coal and other minerals due to its high processing capacity, large range of separation size and simplicity of operation and maintenance.\n\nsawtooth wave jig is a new type of jigs, it is one of the types of modern gravity separation equipment. new it has formed series whose use is expanded. such type of jig uses electromagnetic stepless speed regulation which feature