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加拿大在阿尔伯特的麦克穆里堡(Fort McMurray)地区产出了大量的油砂尾矿,包括砂、粘土及混入的沥青。本研究的目的是选用水力旋流器并对它在排除尾矿中细粒物料方面的作用进行评价,同时产出固体含量为75%的沉砂产品。在半工业试验中对多段水力旋流器进行了研究。采用不同固体含量的超细拉(-44μm)物料作为旋流器的给料。在两段的Linatex选别回路中进行试验时沉砂产品的回收率为98.8%～99.6%,固体含量为73%～75%。当给料浓度变化时对旋流器沉砂的回收率及固体含量影响不大。获得如此好的结果关键是沉砂口的控制以及低压给料法(旋流器直径为23cm时压力为<60kPa)。当超细粒物料含量增加7%时沉砂产品的回收率就显著下降,这可能是由于旋流器中存在过多的粘土而使介质浓度太大的缘故,半工业试验结果比模型预测的要好。当旋流器直径由23cm增加到51cm时对分离点几乎无影响。
Canada produced large quantities of oil sand tailings in the Fort McMurray area of Alberta, including sand, clay and mixed bitumen. The purpose of this study was to select a hydrocyclone and evaluate its role in the exclusion of fine-grained materials in the tailings and to produce grit-containing products with a solids content of 75%. Multi-stage hydrocyclones were studied in a semi-industrial test. Superfine pull (-44μm) with different solids content was used as feed to the cyclone. The grit recovery was 98.8% -99.6% and the solids content was 73% -75% when tested on two sections of Linatex sorting loop. When the feed concentration changes cyclone grit recovery and solid content has little effect. The key to achieving such good results is the control of the grit chamber and the low-pressure feed method (with a pressure of <60 kPa at a cyclone diameter of 23 cm). When the content of ultrafine particles increased by 7%, the recovery rate of grit products decreased significantly, which may be due to too much medium concentration in the cyclone too much clay. The results of semi-industrial tests were better than those predicted by model It is better. There was almost no effect on the separation point when the cyclone diameter increased from 23 cm to 51 cm.