云南某选煤厂浮选精煤焙烧工艺深度降硫研究
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摘要
经过对云南某选煤厂煤泥进行浮选,获得含硫为1.36%(质量分数,下同)的浮选精煤,其中有机硫含量占全硫含量的82.35%,利用物理分选方法进一步脱硫比较困难.采用低温隔绝空气焙烧方法进行煤泥降硫,研究不同焙烧条件对浮选精煤降硫的影响规律,结果表明:在磷基复合药剂(DP)用量为5%,焙烧温度为450℃,焙烧时间为40 min,焙烧物料球团直径为小于9mm的综合焙烧条件下,浮选精煤中的硫含量降至0.30%以下,降硫效果显著,其他有害元素磷和砷等的含量也较低.
A coal flotation slurry from a selected plant in Yunnan was obtained by flotation process.The sulfur content is 1.36%,of which organic sulfur accounted for 82.35%,and physical separation method was difficult to remove sulfur further.The low temperature isolation air roasting method was used to reduce sulfur in slime,and the influence of different roasting condition on sulfur reduction was studied.The results show that in condition of the amount of DP5%,the roasting temperature 450℃,roasting time 40 min and pellet diameter<9 mm,the final sulfur content after roasting can be reduced to below 0.30%,and the effect of reducing sulfur is significant.The contents of other harmful elements,such as phosphorus and arsenic,are also low.
A coal flotation slurry from a selected plant in Yunnan was obtained by flotation process.The sulfur content is 1.36%,of which organic sulfur accounted for 82.35%,and physical separation method was difficult to remove sulfur further.The low temperature isolation air roasting method was used to reduce sulfur in slime,and the influence of different roasting condition on sulfur reduction was studied.The results show that in condition of the amount of DP5%,the roasting temperature 450℃,roasting time 40 min and pellet diameter<9 mm,the final sulfur content after roasting can be reduced to below 0.30%,and the effect of reducing sulfur is significant.The contents of other harmful elements,such as phosphorus and arsenic,are also low.
引文
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[2]胡军,胡永平,王淀佐.超声波强化煤泥浮选脱硫研究[J].应用声学,2000,19(1):22-26.HU Jun,HU Yongping,WANG Dianzuo.Study on Enhancing Fine Coal Dedulfurization by Flotation with Ultrasonic Wave[J].Journal of Applied Acoustics,2000,19(1):22-26.
[3]吴明有,李延锋,冉进财,等.粗煤泥的分选及其对选煤工艺的影响[J].选煤技术,2009(2):71-74.WU Mingyou,LI Yanfeng,RAN Jincai,et al.The Separation of Coarse Slime and Its Influence on Coal Preparation Technology[J].Coal Preparation Technology,2009(2):71-74.
[4]张建强,刘静,刘炯天,等.滇东北地区高硫煤脱硫试验研究[J].煤炭技术,2008,27(1):120-122.ZHANG Jianqiang,LIU Jing,LIU Jiongtian,et al.Investigation of High-sulfur Coal Desulphurization in Northeast of Yunnan Province[J].Coal Technology,2008,27(1):120-122.
[5]丁华琼,熊振涛,李延锋,等.滇东北高硫煤的TBS干扰床脱硫试验研究[J].煤炭工程,2010(7):86-89.DING Huaqiong,XIONG Zhentao,LI Yanfeng,et al.Study of TBS Seperating Northeast Yunnan’s Coal to Reduce Pyrite[J].Coal Engineering,2010(7):86-89.
[6]潘虎,于国巍.褐煤煤泥浮选降灰试验研究[J].选煤技术,2013(3):26-28.PAN Hu,YU Guowei.Experimental Study on Ash Reduction of Lignite Slime by Flotation[J].Coal Preparation Technology,2013(3):26-28.
[7]申克忠,张立维,张少鹏,等.简单有效的煤泥脱硫方法[J].选煤技术,1999(4):8-10.SHEN Kezhong,ZHANG Liwei,ZHANG Shaopeng,et al.Simple and Effective Slime Desulfurization[J].Coal Preparation Technology,1999(4):8-10.
[8]张晓旭,刘扬,张云利.辽宁灵山洗煤厂高硫煤脱除工艺的探讨与研究[J].煤炭技术,2003,22(9):65-66.ZHANG Xiaoxu,LIU Yang,ZHANG Yunli.Discussion and Research on High Sulfur Coal Removal Process in Lingshan Coal Washing Plant[J].Coal Technology,2003,22(9):65-66.
[9]熊彦权,张希梅,胡炳双.煤泥磁化浮选机理的研究[J].应用能源技术,2004(4):12-14.XIONG Yanquan,ZHANG Ximei,HU Bingshuang.Study on Magnetized Flotation Mechanism of Coal Slime[J].Applied Energy Technology,2004(4):12-14.
[10]董立周,刘继红,王俊涛,等.煤泥浮选技术发展概况[J].选煤技术,2015(5):96-100.DONG Lizhou LIU Jihong,WANG Juntao,et al.Survey of the Development of Coal Slime Flotation Technology[J].Coal Preparation Technology,2015(5):96-100.
[11]沈敬佳.煤泥浮选脱硫试验研究[J].能源与环境,2016(2):84.SHEN Jingjia.Experimental Study on Flotation Desulphurization of Coal Slime[J].Energy and Environment,2016(2):84.
[12]马先军,朱申红,王庆峰,等.煤炭高梯度磁选-浮选脱硫降灰试验[J].洁净煤技术,2014,20(1):5-10.MA Xianjun,ZHU Shenhong,WANG Qingfeng,et al.Experimental Study on High-gradient Magnetic Separation and Flotation for Coal Desulfurization and Desliming[J].Clean Coal Technology,2014,20(1):5-10.
[13]谢广元,欧泽深.煤炭洗选脱硫研究[J].中国矿业大学学报,1999,28(5):502-505.XIE Guangyuan,OU Zeshen.Research on Coal Washing Desulfurization[J].Journal of China University of Mining and Technology,1999,28(5):502-505.
[14]王卫东,杨虓,孙远,等.微波场中褐煤水分脱除规律及影响因素分析[J].煤炭学报,2014,39(6):1159-1163.WANG Weidong,YANG Xun,SUN Yuan,et al.Lignite Dewatering Rule and Related Influencing Factors in the Microwave Field[J].Journal of China Coal Society,2014,39(6):1159-1163.
[15]许泽胜,王祖讷.微细粒高硫煤浮选脱硫新工艺的研究[J].选煤技术,2001(4):11-12.XU Zesheng,WANG Zu’na.Study on a New Technology of Flotation Desulfurization with Fine Granular High Sulfur Coal[J].Coal Preparation Technology,2001(4):11-12.
[16]宋书宇,朱光莹.西曲8号煤泥浮选脱硫试验[J].选煤技术,2000(4):24-25.SONG Shuyu,ZHU Guangying.Experiment of Flotation Desulfurization of Xiqu No.8Coal Slime[J].Coal Preparation Technology,2000(4):24-25.
[17]王云雁,朱申红,马先军,等.细粒煤磁选-浮选脱硫脱灰试验研究[J].洁净煤技术,2015,21(3):36-39.WANG Yunyan,ZHU Shenhong,MA Xianjun,et al.Desulfurization and Deashing of Fine Coal Through Magnetic Sperationflotation[J].Clean Coal Technology,2015,21(3):36-39.
[18]李登新,高晋生,孟繁玲,等.一种高有机硫煤的化学药剂脱硫研究[J].煤炭转化,1999,22(3):49-52.LI Dengxin,GAO Jinsheng,MENG Fanling,et al.The Desulfurization of High Sulfur Coal by the Sweetening Agent[J].Coal Conversion,1999,22(3):49-52.