On the basis of analyzing the characteristic of co rotating twin screw extrusion for mixing procedure,some key points about the equipment,technique,and mould of direct extrusion with a co rotating twin screw extruder are presented and discussed.

By theoretical analysis and experimental exploration,a complete hydrometallurgical process flow sheet was determined ultimately:direct leaching by nitric acid—impurity removal from leaching solution—precipitation of nickel sulphide—precipitation of magnesium carbonates—alkaline leaching of acid-leach residue and purifying residue—precipitation of calcium molybdate.

Study on enzyme use in rapeseed direct extraction technology;

Through simulating the process of batch extraction,the optimal conditions of direct extraction of cottonseed kernel with isopropanol were researched.