某氧化铝厂采用两层和五层沉降槽分离赤泥,平均溢流速度分别为0.2和0.15米~3/米~2·小时。为了查清多层沉降槽单位产能低的原因,曾测量了两层赤泥沉降槽上层和下层的溢流速度,得出的沉降槽溢流产能是:上层为0.28,下层为0.12,平均为0.2米~3/米~2·小时。这就是说, An alumina plant uses two-story and five-story sedimentation tanks to separate red mud with an average overflow rate of 0.2 and 0.15 m 3 / m 2 · h, respectively. In order to find out the reasons for the low unit productivity of the multi-layer sedimentation tank, the overflow velocity of the upper and lower layers of the two-layer red mud sedimentation tank was measured. The overflow capacity of the sedimentation tank was 0.28 for the upper layer and 0.12 for the lower layer, with an average of 0.2 m ~ 3 / m ~ 2 h. This means that,