The material is made to conduct a compound motion in the cone because of the rotation and revlution of the screws．The effected mtions include：
(1) The revolution of the screw along the wall making the material conduct a cricumfreial motion;
(2) The rotation of the scerw making the material rise along the scerw from the cone botton;
(3) The compound motion of the ratation and revolution of the screws making partial material be absorbed into the screew cylindroid meanwhile, under the action of centrifugal force，the partial material in the screw cylindroid discharges radialy;
(4) The rised material drops under its sole weight，the four kinds motions effect convection, shearing, diffusion in the cone, thus quick and even mixing can be achieved.
It is suitable for chemical industry, phramaceutical industry, pesticide, dyestuff, petroleum industry, metallurgical industry, construction material and etc. Such as in the mixing, reaction, drying, cooling of powder (solid-solid), powder and liquid (solid-liquid), liquid and liquid (liquid-liquid).