工程科学学报.第42卷，第8期：963-971.2020年8月 Chinese Journal of Engineering,Vol.42,No.8:963-971,August 2020 https://doi.org/10.13374/j.issn2095-9389.2019.12.19.002;http://cje.ustb.edu.cn 碱激发水泥-磷渣固化性能及与含硫尾砂的相容性 姜关照1,2)，吴爱祥12，王贻明，2)区 1)北京科技大学土木与资源工程学院，北京1000832)金属矿山高效开采与安全教育部重点实验室，北京100083 ☒通信作者，E-mail:ustbwym@126.com 摘要基于磷渣材料水化特性和矿山充填应用条件，研究碱激发水泥-磷渣共同作为胶凝材料(CPCM)胶结含硫尾砂的可 行性.选取生石灰、NaOH、Na,SiO3作为激发剂.开展CPCM固化性能试验，并评价CPCM与含硫尾砂相容性.研究结果表 明：磷渣掺量为水泥的100%、生石灰为3%时.CPCM终凝时间300mi.28d抗压强度40.6MPa,基本可等量替代P.042.5水 泥应用于矿山嗣后充填.Na2SiO3掺量49%时，CPCM终凝时间比水泥缩短39.3%，7d强度提高31.1%.与水泥相比，CPCM使 充填体凝结时间缩短8左右，且固化28d后强度未出现劣化.表明CPCM与含硫尾砂相容性好.X射线衍射、扫描电镜和 电子能谱分析表明.CPCM水化产物主要为C(OH2和C-S-H.磷渣不断水化，导致Ca(OH2含量下降，逐渐形成致密的低 C/Si摩尔比C-S-H,这不仅保证了CPCM后期强度增加.而且避免了充填体强度劣化. 关键词磷渣：碱激发剂：早期活性：含硫尾砂：矿山充填 分类号TD853 Curing performance of alkali-activated cement-phosphorous slag and its compatibility with sulfur tailings JIANG Guan-hao2.WU Ai-xiang2),WANG Yi-ming2 1)School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China 2)Key Laboratory of Ministry of Education of China for High-efficient Mining and Safety of Metal Mines,Beijing 100083,China Corresponding author,E-mail:ustbwym@126.com ABSTRACT Phosphorus slag(PS)is an industrial waste discharged during the refining of yellow phosphorus by a high-temperature electric furnace.The slag is generally deposited on the surface in situ,and this uses up considerable areas of land and causes environmental pollution problems.The glass phase content in electric furnace PS is over 90%,indicating that the PS has potential cementitious property.As a cement admixture,PS has a retarding effect on cement,thus,its application to cement has become less adopted.Based on the hydration characteristics of PS and the application conditions of mine filling,the feasibility of alkali-activated cement-PS used as cementitious material (CPCM)to cement sulfur tailings was studied.Quicklime,NaOH,and NaSiO:were used as the activators to investigate the CPCM curing performance in a laboratory,and the compatibility of CPCM with sulfur tailings was evaluated.The results show that when the PS-to-cement mole ratio is 1:1,quicklime is 3%of PS,the final setting time of CPCM is 300 min,and the CPCM strength for 28 days is 40.6 MPa,indicating that the material can replace P.O 42.5 cement in the subsequent filling process.When the NaSiO;is 4%of PS,the final setting time of CPCM is 39.3%less than that of cement,and its strength for 7 days is 31.1%higher than that of cement.Compared with cement,CPCM shortens the setting time of backfill by 8 hours,and its strength does not deteriorate after curing for 28 days.Therefore,CPCM is suitable for cementing sulfur tailings.X-ray diffraction (XRD), scanning electron microscopy (SEM),and energy-dispersive X-ray spectroscopy (EDS)analyses show that the CPCM hydration 收稿日期：2019-12-19 基金项目：国家自然科学基金资助项目(51674012)：国家重点研发计划资助项目(2017YFC0602903)碱激发水泥−磷渣固化性能及与含硫尾砂的相容性 姜关照1,2)，吴爱祥1,2)，王贻明1,2) 苣 1) 北京科技大学土木与资源工程学院，北京 100083    2) 金属矿山高效开采与安全教育部重点实验室，北京 100083 苣通信作者，E-mail：ustbwym@126.com 摘    要    基于磷渣材料水化特性和矿山充填应用条件，研究碱激发水泥−磷渣共同作为胶凝材料（CPCM）胶结含硫尾砂的可 行性. 选取生石灰、NaOH、Na2SiO3 作为激发剂，开展 CPCM 固化性能试验，并评价 CPCM 与含硫尾砂相容性. 研究结果表 明：磷渣掺量为水泥的 100%、生石灰为 3% 时，CPCM 终凝时间 300 min，28 d 抗压强度 40.6 MPa，基本可等量替代 P.O 42.5 水 泥应用于矿山嗣后充填. Na2SiO3 掺量 4% 时，CPCM 终凝时间比水泥缩短 39.3%，7 d 强度提高 31.1%. 与水泥相比，CPCM 使 充填体凝结时间缩短 8 h 左右，且固化 28 d 后强度未出现劣化，表明 CPCM 与含硫尾砂相容性好. X 射线衍射、扫描电镜和 电子能谱分析表明，CPCM 水化产物主要为 Ca(OH)2 和 C−S−H. 磷渣不断水化，导致 Ca(OH)2 含量下降，逐渐形成致密的低 Ca/Si 摩尔比 C−S−H，这不仅保证了 CPCM 后期强度增加，而且避免了充填体强度劣化. 关键词    磷渣；碱激发剂；早期活性；含硫尾砂；矿山充填 分类号    TD853 Curing performance of alkali-activated cement–phosphorous slag and its compatibility with sulfur tailings JIANG Guan-zhao1,2) ，WU Ai-xiang1,2) ，WANG Yi-ming1,2) 苣 1) School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China 2) Key Laboratory of Ministry of Education of China for High-efficient Mining and Safety of Metal Mines, Beijing 100083, China 苣 Corresponding author, E-mail: ustbwym@126.com ABSTRACT    Phosphorus slag (PS) is an industrial waste discharged during the refining of yellow phosphorus by a high-temperature electric  furnace.  The  slag  is  generally  deposited  on  the  surface in situ,  and  this  uses  up  considerable  areas  of  land  and  causes environmental  pollution  problems.  The  glass  phase  content  in  electric  furnace  PS  is  over  90%,  indicating  that  the  PS  has  potential cementitious  property.  As  a  cement  admixture,  PS  has  a  retarding  effect  on  cement,  thus,  its  application  to  cement  has  become  less adopted. Based on the hydration characteristics of PS and the application conditions of mine filling, the feasibility of alkali-activated cement–PS used as cementitious material (CPCM) to cement sulfur tailings was studied. Quicklime, NaOH, and Na2SiO3 were used as the  activators  to  investigate  the  CPCM  curing  performance  in  a  laboratory,  and  the  compatibility  of  CPCM  with  sulfur  tailings  was evaluated. The results show that when the PS-to-cement mole ratio is 1∶1, quicklime is 3% of PS, the final setting time of CPCM is 300 min, and the CPCM strength for 28 days is 40.6 MPa, indicating that the material can replace P.O 42.5 cement in the subsequent filling process. When the Na2SiO3 is 4% of PS, the final setting time of CPCM is 39.3% less than that of cement, and its strength for 7 days is 31.1% higher than that of cement. Compared with cement, CPCM shortens the setting time of backfill by 8 hours, and its strength does  not  deteriorate  after  curing  for  28  days.  Therefore,  CPCM  is  suitable  for  cementing  sulfur  tailings.  X-ray  diffraction  (XRD), scanning  electron  microscopy  (SEM),  and  energy-dispersive  X-ray  spectroscopy  (EDS)  analyses  show  that  the  CPCM  hydration 收稿日期: 2019−12−19 基金项目: 国家自然科学基金资助项目 (51674012)；国家重点研发计划资助项目 (2017YFC0602903) 工程科学学报，第 42 卷，第 8 期：963−971，2020 年 8 月 Chinese Journal of Engineering, Vol. 42, No. 8: 963−971, August 2020 https://doi.org/10.13374/j.issn2095-9389.2019.12.19.002; http://cje.ustb.edu.cn