铬铁矿掺杂对压裂支撑剂结构与性能的影响

doi:10.3724/SP.J.1077.2013.12689

无机材料学报 ›› 2013, Vol. 28 ›› Issue (9): 1019-1024.DOI: 10.3724/SP.J.1077.2013.12689 CSTR: 32189.14.SP.J.1077.2013.12689

铬铁矿掺杂对压裂支撑剂结构与性能的影响

高峰^1,2, 吴尧鹏^1,2, 刘军^1,2, 何宏伟^1,2, 康利涛^1,2, 梁伟^1,2

(太原理工大学 1. 材料科学与工程学院; 2. 教育部新材料界面与工程重点实验室; 太原 030024)

收稿日期:2012-11-14 修回日期:2012-12-26 出版日期:2013-09-20 网络出版日期:2013-08-14
基金资助:
煤转化国家重点实验室开放基金(09-102); 全国博士后基金(2012M52060); 太原理工大学2012年校专项/青年基金(2012L052)

Effects of Chromite Additive on the Microstructure and Performance of Bauxite-based Fracturing Proppant

GAO Feng^1,2, WU Yao-Peng^1,2, LIU Jun^1,2, HE Hong-Wei^1,2, KANG Li-Tao^1,2, LIANG Wei^1,2

(1. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China; 2. Key Laboratory of Interface Science and Engineering in Advance Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China)

Received:2012-11-14 Revised:2012-12-26 Published:2013-09-20 Online:2013-08-14
Supported by:
State Key Laboratory of Coal Conversion(09-102); China Postdoctoral Science Foundation(2012M52060); Special/Youth Foundation of Taiyuan University of Technology (2012L052)

摘要/Abstract

摘要： 以低品位CLK6-62型铝矾土为主要原料, 采用无压煅烧技术制备了铬铁矿掺杂的铝矾土基石油压裂支撑剂, 并系统考察了铬铁矿添加量对试样物相、微结构及性能的影响。分析表明, 铬铁矿掺杂有效促进了铬刚玉相和棒状莫来石相的发育, 从而获得了具有双重增强机制的高强度试样。其中, 铬铁矿添加量为2wt%时, 试样烧结温度可降低60℃(从1480℃到1420℃), 并且其在69 MPa闭合压力下的破碎率仅为1.8%(未掺杂试样: 5.1%)。该工艺采用低品位矿物原料及现有设备, 所制备支撑剂性能高于相应标准要求, 具有较好的推广前景。

关键词: 铝矾土, 铬铁矿, 石油压裂支撑剂, 破碎率

Abstract: High-strength fracturing proppant was prepared by pressureless sintering process using bauxite (67wt% Al₂O₃) and chromite as raw materials. The influence of chromite content (0-5wt%) on phase composition, microstructure and breakage ratio were studied by XRD, SEM, EDS and the column compression method, respectively. The results indicate that the additive of chromite promotes the formation of solid solution of chrome-corundum (Al_2-2xCr_2xO₃,0＜x＜1)and rod-shape mullite phases, both of which are believed to strengthen the fracturing proppant. Additionally, liquid phase is formed by excessive ferrum located between the ceramic grains at relatively high sintering temperatures, which is important for accelerating the sintering densification. The sintering temperature decreases with the addition of chromite. The optimized proppant sample with 2wt% chromite doped, sintered at 1420℃ for 2 h shows a breakage ratio of only 1.8% under the pressure of 69 MPa. Furthermore, 2 wt% chromite doping decreases the sintering temperature by 60℃ (from 1480℃ to 1420℃). This process enables the production of high-strength fracturing proppant from low-rank mineral materials and demonstrates a promising practical application.

Key words: bauxite, chromite, fracturing proppant, breakage ratio

中图分类号:

TQ174

高峰, 吴尧鹏, 刘军, 何宏伟, 康利涛, 梁伟. 铬铁矿掺杂对压裂支撑剂结构与性能的影响[J]. 无机材料学报, 2013, 28(9): 1019-1024.

GAO Feng, WU Yao-Peng, LIU Jun, HE Hong-Wei, KANG Li-Tao, LIANG Wei. Effects of Chromite Additive on the Microstructure and Performance of Bauxite-based Fracturing Proppant[J]. Journal of Inorganic Materials, 2013, 28(9): 1019-1024.

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铬铁矿掺杂对压裂支撑剂结构与性能的影响

Effects of Chromite Additive on the Microstructure and Performance of Bauxite-based Fracturing Proppant

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