煤矸石掺量对陶粒支撑剂性能的影响
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摘要
以铝矾土和煤矸石为主要原料,通过调整二者质量比(1:1,2:3和3:7),经造粒成球、不同温度烧结制备得到陶粒支撑剂。结果表明:当煤矸石掺入量为60%(质量分数)、35 MPa闭合压力下,满足破碎率行业标准的烧结温度范围为1 250～1 450℃,在该温度区间内,随着烧结温度的升高,样品的结晶相转变为棒状莫来石相,形成一种致密的网状交联结构,进而提高了陶粒支撑剂的抗破碎能力;当烧结温度为1 450℃时,体积密度及视密度分别为1.49和2.76 g/cm~3,破碎率指标达到最低值3.0%,证实利用煤矸石替代铝矾土可以制备出用于煤层气井开采用的陶粒支撑剂。
Ceramic proppants were prepared with bauxite and coal gangue at different sintering temperatures and mass ratios of bauxite and coal gangue(i.e., 1:1, 2:3, 3:7). The results show that the sintering temperature available for the preparation is from 1 250 to 1 450 ℃ at 35 MPa and a mass ratio of bauxite and coal gangue of 2:3. The crystalline phase transforms into a rod-shaped mullite phase to form the cross-linked structure when the sintering temperature increases, thus improving the densification and crush resistance of proppants. The bulk density and apparent density are 1.49 and 2.76 g/cm~3, respectively, at a breakage ratio of 3.0% and a sintering temperature of 1 450 ℃. It is indicated that the proppants used in the exploitation of coalbed methane wells could be prepared with a part of coal gangue instead of bauxite.
Ceramic proppants were prepared with bauxite and coal gangue at different sintering temperatures and mass ratios of bauxite and coal gangue(i.e., 1:1, 2:3, 3:7). The results show that the sintering temperature available for the preparation is from 1 250 to 1 450 ℃ at 35 MPa and a mass ratio of bauxite and coal gangue of 2:3. The crystalline phase transforms into a rod-shaped mullite phase to form the cross-linked structure when the sintering temperature increases, thus improving the densification and crush resistance of proppants. The bulk density and apparent density are 1.49 and 2.76 g/cm~3, respectively, at a breakage ratio of 3.0% and a sintering temperature of 1 450 ℃. It is indicated that the proppants used in the exploitation of coalbed methane wells could be prepared with a part of coal gangue instead of bauxite.
引文
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[14]刘爱平,田玉明,孔祥辰,等.烧结温度对莫来石/石英质经济型陶粒支撑剂性能的影响[J].中国陶瓷,2015,51(2):61-64.LIU Aiping,TIAN Yuming,KONG Xiangchen,et al.China Ceram(in Chinese),2015,51(2):61-64.
[2]柏雪,王玺堂.添加锰矿粉和碳酸钙对铝硅质陶粒支撑剂材料性能的影响[J].耐火材料,2012,46(2):99-101.BAI Xue,WANG Xitang.Refract(in Chinese),2012,46(2):99-101.
[3]郭子娴,陈前林,喻芳芳,等.高强度低密度陶粒支撑剂的研究[J].中国陶瓷,2013,49(3):44-47.GUO Zixian,CHEN Qianlin,YU Fangfang,et al.China Ceram(in Chinese),2013,49(3):44-47.
[4]陈平,刘凯,刘毅,等.低密高强压裂支撑剂的研究[J].陕西科技大学学报,2014,32(1):63-67.CHEN Ping,LIU Kai,LIU Yi,et al.J ShanXi Univ Sci Technol(in Chinese),2014,32(1):63-67.
[5]武雅乔,王凯悦,田玉明,等.白云石对焦宝石陶粒晶粒发育及性能的影响[J].硅酸盐通报,2017,36(5):1524-1529.WU Yaqiao,WANG Kaiyue,TIAN Yuming,et al.Bull Chin Ceram Soc(in Chinese),2017,36(5):1524-1529.
[6]姚宏龙.煤矸石资源再生利用途径[J].山西化工,2017,169(3):66-67.YAO Honglong.Shan Xi Chem Ind(in Chinese),2017,169(3):66-67.
[7]曹永丹,李彦鑫,张金山,等.细度和煅烧温度对煤矸石火山灰活性及微观结构的影响[J].硅酸盐学报,2017,45(8):1153-1158.CAO Yongdan,LI Yanxin,ZHANG Jinshan,et al.J Chin Ceram Soc,2017,45(8):1153-1158.
[8]霍晨磊,何亚波,孟子浩,等.煤矸石资源化利用技术综述[J].山西焦煤科技,2011(1):47-52.HUO Chenlei,HE Yabo,MENG Zihao,et al.Shanxi Coking Coal Sci Technol(in Chinese),2011(1):47-52.
[9]王田惠,田玉明,周毅,等.烧结温度对煤层气井用陶粒支撑剂的影响研究[J].硅酸盐通报,2016,35(3):848-851.WANG Tianhui,TIAN Yuming,ZHOU Yi,et al.Bull Chin Ceram Soc(in Chinese),2016,35(3):848-851.
[10]国家能源局.SY/T5108-2014水力压裂和砾石充填作业用支撑剂性能测试方法[S].北京:石油工业出版社,2015.National Energy Administration.SY/T5108-2014 Measurement of properties of proppants used in hydraulic fracturing and gravel-packing operations.[S].Beijing:Petroleum Industry Press.2015.
[11]罗驹华,侯贵华,周勇敏,等.高能球磨低温煅烧制备单相莫来石[J].硅酸盐学报,2003,31(3):257-261.LUO Juhua,HOU Guihua,ZHOU Yongmin,et al.J Chin Ceram Soc,2003,31(3):257-261.
[12]HAO J Y,MA H Q,FENG X,et al.Microstructure and fracture mechanism of low density ceramic proppants[J].Mater Lett,2018,213:92-94.
[13]MA X X,TIAN Y M,ZHOU Y,et al.Sintering temperature dependence of low-cost,low-density ceramic proppant with high breakage resistance[J].Mater Lett,2016,180:127-129.
[14]刘爱平,田玉明,孔祥辰,等.烧结温度对莫来石/石英质经济型陶粒支撑剂性能的影响[J].中国陶瓷,2015,51(2):61-64.LIU Aiping,TIAN Yuming,KONG Xiangchen,et al.China Ceram(in Chinese),2015,51(2):61-64.
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