矿业科学学报2024，Vol.9Issue(1)：98-105,8.DOI:10.19606/j.cnki.jmst.2024.01.010
高含量重密度组分煤重介质旋流器分选特性研究
Study on Separation characteristics of dense medium cyclone for raw coal with high density fraction contents
摘要
Abstract
This study attempts to enhance the separation efficiency of dense media cyclone for raw coal feed with difficult-to-cleaning and large high-density component content.Specifically,this paper 1)de-signed a novel heavy media cyclone model device,2)established a mathematical model of sedimentation separation of particles in the centrifugal rotating flow field,3)investigated the separation characteristics of the new dense media cyclone by combining experimental research and theoretical anal-ysis,which revealed the separation variation patterns of raw coal difficult to select with high content heavy density components under different process parameters,4)explored the factors affecting the dy-namic stability of the working suspension in the flow field of the new heavy media cyclone and the dis-charge and transportation mechanism of heavy products.Results show that when the new dense media cyclone separates raw coal with high content of heavy density components,underflow heavy products ex-hibit stronger discharge capacity and higher processing capacity,while the centrifugal swirl field shows smaller density gradient distribution of suspension,more uniform density distribution,lower value of the difference between the underflow and the overflow density,as well as stronger stability of the suspension in the flow field.The feeding pressure is directly correlated with the dynamic stability of the suspension,separation accuracy and the discharge efficiency of heavy products.With increasing feeding pressure,the suspension discharged from the underflow and overflow port shows increased density difference,re-duced possible deviation E value,improved separation accuracy and elevated amount of heavy product discharged.When the feeding pressure is 25 kPa,the actual separation density is 1.666 g/cm3,the pos-sible deviation E value is 0.09 g/cm3,and the yield of heavy products is 75.23%,which provides new insights into the separation of raw coal with high content,heavy density components.关键词
重介质旋流器/重密度组分/分选特性/重介质悬浮液/分配曲线Key words
dense medium cyclone/heavy density components/separation characteristics/heavy medium suspension/distribution curve分类
矿业与冶金引用本文复制引用
赵龙,朱学帅,韦鲁滨,王保强,陈江涛,吴冰斌,官长平..高含量重密度组分煤重介质旋流器分选特性研究[J].矿业科学学报,2024,9(1):98-105,8.基金项目
矿物加工科学与技术国家重点实验室开放基金(BGRIMM-KJSKL-2023-14) （BGRIMM-KJSKL-2023-14）
北京市自然科学基金面上项目(2232067) （2232067）
宜宾市引进高层次人才项目(2022YJ04) （2022YJ04）
