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检验了倾斜逆流沉淀装置的性能,发现在粒度分级方面可以进行明显的分离点控制,从而为采用水力旋流器提供了一种选择。将细粒烟煤悬浮液(一般小于300μm)给入管径25mm、长1.4m的容器内,容器倾斜角度为45°。矿浆流过容器,比较粗的颗粒沉淀在管壁的较低部分,使剩余悬浮液粒度越来越细,浓度较稀。沉淀的颗粒滑下管壁,在较高的矿浆浓度下将矿浆从容器底部泵出来,而剩余悬浮液从容器顶部流出。进行的试验采用了8种不同的给矿浓度,范围为2.4～21.7%固体。确定了在6种不同流速下每一种给矿矿浆浓主的底流(粗粒)和溢流(细粒)
The performance of the Tilt Counterflow Precipitator was tested and it was found that significant separation point control was possible with respect to particle size grading, providing an alternative to hydrocyclones. Fine-grained bituminous coal suspension (generally less than 300μm) was fed into a container of 25mm diameter and 1.4m long with a container inclination of 45 °. The slurry flows through the vessel and the coarser particles settle on the lower part of the tube wall, causing the remaining suspension to become finer and finer in particle size. Precipitated particles slides down the tube wall, pumped slurry from the bottom of the vessel at higher slurry concentrations, and the remaining slurry flows from the top of the vessel. The tests were conducted using eight different feed concentrations, ranging from 2.4 to 21.7% solids. The underflow (coarse grain) and overflow (fine grain) of each concentrate fed with ore were determined at six different flow rates,