大同石炭系煤高灰半焦浮选脱灰研究  

Study on ash reduction of the high-ash semi-coke of Datong carboniferous system using flotation process

作　　者：陆鹏飞 田利军 武荣成[1] 许光文[2] LU Pengfei;TIAN Lijun;WU Rongcheng;XU Guangwen(State Key Laboratory of Multiphase Complex System,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China;Key Laboratory on Resources of Chemicals and Materials of Ministry of Education,ShenyangUniversity of Chemical Technology,Shenyang 110142,China;Mass Entreprenearship and Innovation Conter,Jinneng Holding Shanxi Institute of Science and Technology Co.Ltd,Datong 037009,China)

机构地区：[1]中国科学院过程.工程研究所多相复杂系统国家重点实验室,北京100190 [2]沈阳化工大学资源化工与材料教育部重点实验室,辽宁沈阳110142 [3]晋能控股山西科学技术研究院有限公司双创中心,山西大同037009

出　　处：《选煤技术》2022年第1期30-33,共4页Coal Preparation Technology

基　　金：国家自然科学基金资助项目(U1908201)。

摘　　要：高灰半焦脱灰提质对提高其利用价值有重要意义。为了探究不同药剂用量对浮选效果的影响,以大同石炭系煤热解所产高灰半焦为试样进行了研究,重点考察了当煤油为捕收剂、仲辛醇为起泡剂时,药剂用量和半焦粒度对浮选效果的影响,并探索了添加表面活性剂(曲拉通X-100)对降低药剂用量的影响。结果表明煤油和仲辛醇用量以及半焦破碎粒度均对脱灰效果有显著影响:增加煤油和仲辛醇用量,则精焦产率提高,精焦灰分呈先下降后上升趋势;半焦经破碎后粒径减小,在一定范围内有利于降低精焦灰分,但过破碎会对浮选产生不利影响。在煤油和仲辛醇用量分别为2400 g/t和400 g/t及适宜半焦粒径分布条件下,对于灰分为50.3%的原半焦,所得精焦灰分为21.1%,产率为53.2%,可燃体回收率为84.4%;通过加入表面活性剂(曲拉通X-100),可显著降低煤油和仲辛醇的用量,提高精焦产率和可燃体回收率。Ash reduction and upgrading of the high-ash semi-coke is of vital importance for the improve-ment of its utilization value.In the paper,the high-ash semi-coke of carboniferous system produced by pyrolysis is taken as the sample to explore the influence on flotation effect produced by different dosages of agents,particularly the effect produced by the use of kerosene as collector and sec-octanol as frother,dosages of agents and particle size of semi-coke.The effect for reduction of dosage of agents with the use of surfactant Triton X-100 is also investigated.As revealed by test results,the dosages of kerosene and sec-octanol and particle size of coke all exert a significant influence on the effect of reduction of ash of the coke;the yield of flotation concentrate increases with the increase of dosages of kerosene and sec-octanol while the ash of the concentrate shows the trend of first dropping down and then rising up;reduction of size of coke through crushing is inducive to the reduction of ash of concentrated coke in a certain range,but overcrushing can produce an adverse effect on flotation of coke;when flotation is made with a respec-tive dosage of kerosene and sec-octanol of being 2400 g/t and 400 g/t and an appropriate size distribu-tion of the flotation feed with an ash of 50.3%,the ash of the flotation concentrate is reduced to 21.1%and its yield and the recovery of combustible matters go up to 53.2%and 84.4%respectively;and the addition of Triton X-100 can lead to noticeable reduction of dosages of agents and increase of yield of flo-tation concentrate and recovery of combustible matter.

关 键 词：高灰半焦脱灰 分步释放浮选试验 浮选效果 曲拉通X-100 药剂用量 

分 类 号：TD943[矿业工程—选矿]