eaching rule of classification according to the operating mode of oil process, the technology can be divided into legal system of oil intermittent leaching and continuous type:
1, intermittent leaching embryo into the device, the pulp of the leaching of discharge, the injection of fresh solvent and strong process operation, such as pump oil mix are partial, continuous and periodic leaching process are of this type process.
2, continuous leaching embryo into the device, the pulp of the leaching of discharge, the injection of fresh solvent and strong process operation, such as pump oil mix is carried out in continuous leaching process are of this type process.
According to the contact way, the technology can be divided into legal system of oil immersion leaching, spray type leaching and hybrid: 
3, immersion type leaching embryo soaked in solvent complete leaching process called immersion type.Of the leaching equipment of immersion tin group type, and bow type, U and Y type leaching and etc.
4, spray type leaching solvent in spray state in contact with the material embryo and complete the leaching process is known as spray type leaching, leaching of spray type equipment such as caterpillar leacher.


5, hybrid leaching This is a kind of spray and soak the leaching method of combining belong to hybrid leaching equipment have swing type and circular extractor from leaching and etc.