The SLES homogenization vessel designed by ZJS uses ellipsoid head in past which solve the problem of product remaining at corner. But the cost is high and useless room is large. In the latest optimized design, ZJS uses plate cover with curve edge, which also solves the problem of product remaining at corner and reduces the cost of head. The mixer uses curved surface type of variable cross-section and variable angular which has advantages of high homogenization effect, no air brought in and low energy consumption.