摘要
调浆是浮选过程的预处理阶段,调浆效果对浮选行为有显著影响。为了探究撞击流对浮选调浆过程的强化效果,选取湖南省冷水江市金竹山电厂粉煤灰为研究对象,采用撞击流强制混合调质装置,开展浮选调浆试验研究。通过研究调浆频率对捕收剂吸附量、粉煤灰接触角的影响,评价撞击流对调浆过程的强化效果;通过探究调浆频率对未燃炭回收率、尾矿烧失量的影响,评价撞击流混合调浆对粉煤灰浮选行为的影响。结果表明:在所研究的频率范围内,调浆频率为50 Hz时,调质器的调浆效果最好,可获得最大吸附量为1.90 mg/g、最大接触角为63.81°、最大累计未燃炭回收率为94.91%、最小尾矿烧失量为3.68%。
As a pretreatment link in flotation process,pulp preconditioning exerts a significant bearing on flotation effect.For exploring the effect of intensification of flyash pulp conditioning obtained with the use of the impact-flow mixer,the flyash from Jinzhushan Power Plant of Lengshuijiang City,Hunan Province is selected as the object of study.Test is made with the forced mixing and conditioning device to investigate and evaluate the effect of mixing frequency on absorbing capacity of collector,contact angle of flyash,recovery rate of unburnt carbon,and loss on ignition of tailings,as well as the effectiveness of the method in intensification of pulp conditioning process,and its influence on flyash flotation behaviors.As evidenced by test result,within the range of the mixing frequencies under study,at a frequency of 50 Hz,a best pulp conditioning result can be expected,with the absorbing capacity of collector,flyash contact angle and cumulative recovery of unburnt carbon all reaching respectively a maximum level of 1.90 mg/g,63.81°and 94.91%,and a loss of tailings on ignition reduced to a minimum of 3.68%.
作者
刘艳
闫露丹
谷瑞
崔琴文
张春泉
张海军
LIU Yan;YAN Ludan;GU Rui;CUI Qinwen;ZHANG Chunquan;ZHANG Haijun(National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology, Xuzhou 221116, China;School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China)
出处
《选煤技术》
CAS
2020年第6期12-16,共5页
Coal Preparation Technology
基金
国家自然科学基金优秀青年科学基金资助项目(51722405)
江苏省高等学校大学生创新创业训练计划项目(201910290173X)。
关键词
浮选调浆
粉煤灰
撞击流
未燃炭回收率
烧失量
flotation pulp conditioning
flyash
impact flow
recovery rate of unburnt carbon
loss on ignition
