摘要
针对常规旋流器存在的底流夹细问题,提出了旋风充气式和气泡充气式旋流器,将气体充入旋流器内后,可使混入外旋流中的细颗粒重新被吹入内旋流进行二次分离,从而达到减少底流夹细的目的。通过试验对比分析了两种不同充气方式旋流器和常规旋流器的分离性能。结果表明,相比于常规旋流器,充气式旋流器能有效减少底流夹细,常规旋流器底流中-10μm颗粒占比6.32%,而使用旋风充气式旋流器能降至5.32%;使用气泡充气式旋流器能降至5.53%。充气条件下,对于-20μm颗粒的综合分级效率,旋风充气式旋流器可提高4.92个百分点;气泡充气式旋流器可提高3.24个百分点。旋风充气式旋流器分离性能优于气泡充气式旋流器,试验结果可以为新型充气式旋流器的设计提供指导。
In view of the problem of underflow clamping in conventional hydrocyclones,the new types of hydrocyclones with cyclone inflatable structure and bubble inflatable structure were proposed,after filling the gas into the hydrocyclone,the fine particles mixed into the outer hydrocyclone can be blown into the inner hydrocyclone for secondary separation,so as to reduce fine particles in the underflow. The separation performance of two kinds of hydrocyclones with different inflatable structure and the conventional hydrocyclones were compared and analyzed through experiments. The results show that compared with the conventional hydrocyclone,the hydrocyclones with inflatable structure can effectively reduce the fine particles in the underflow.The content of-10 μm particles in the underflow of the conventional hydrocyclone is 6. 32%,while it is reduced to 5. 32% after using the cyclone inflatable structure and 5. 32% after using the bubble inflatable structure. Meanwhile,the comprehensive classification efficiency of-20 μm particles can be improved by 4. 92 percentage points,and 3. 24 percent after using the cyclone inflatable structure and the bubble inflatable structure respectively. The separation performance of former is better and the results can provide guidance for the design of the new inflatable hydrocyclone.
作者
张宏杰
杨兴华
刘培坤
姜兰越
李晓宇
ZHANG Hongjie;YANG Xinghua;LIU Peikun;JIANG Lanyue;LI Xiaoyu(College of Mechanical and Electrical Engineering,Shandong University of Science and Technology,Qingdao 266590,China)
出处
《金属矿山》
CAS
北大核心
2022年第4期202-207,共6页
Metal Mine
基金
国家自然科学基金项目(编号:22108159)
山东省自然科学基金项目(编号:ZR2021QB068)。
关键词
旋流器
底流夹细
充气方式
旋风充气
气泡充气
分离性能
hydrocyclone
underflow clamping
inflatable method
cyclone inflatable
bubble inflatable
separation performance
