超声波对充填料浆流变特性的影响及流变参数预测
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摘要
为了改善高浓度充填料浆的流变特性,降低充填系统中堵管现象发生的概率,将超声波非接触性地作用于充填料浆。采用高精度Brookfield R/S-SST软固体测试仪,通过试验检测得到超声波作用下不同浓度、不同灰砂比全尾砂充填料浆的流变参数。结果表明:超声波可以显著改善充填料浆的流变特性,降低充填料浆的塑性黏度和屈服应力,超声对料浆黏度值的降低效果可达4.32%～39.33%,对料浆屈服应力的减小效果可达9.66%～34.27%。同时,借助支持向量机建立充填料浆流变参数预测模型。所得预测模型校验结果显示,该模型精度较高,具有较强的泛化能力,实现了功率超声条件下充填料浆流变参数的预测。
In order to improve the rheological properties of the high-concentration backfill slurry and reduce the probability plugging phenomenon occurred of backfilling system, the innovative non-contact effect of ultrasound on the backfilling slurry was studied. Using high-precision brookfield R/S-SST soft solid tester, the rheological parameters with different concentrations and different lime-sand ratios were obtained under different ultrasonic powers of backfill slurry. The results show that ultrasonic waves can significantly improve the rheological properties and reduce the plastic viscosity and yield stress of the backfilling slurry. The viscosity of backfill slurry can be reduced by ultrasonic waves from 4.32% to 39.33%, and the yield stress can be reduced from 9.66% to 34.27%. At the same time, the prediction model of rheological parameters of backfilling slurry was established by using support vector machine. The results of the prediction model show that the model has high precision and strong generalization ability. The prediction of rheological parameters of backfilling slurry under ultrasonic is realized.
In order to improve the rheological properties of the high-concentration backfill slurry and reduce the probability plugging phenomenon occurred of backfilling system, the innovative non-contact effect of ultrasound on the backfilling slurry was studied. Using high-precision brookfield R/S-SST soft solid tester, the rheological parameters with different concentrations and different lime-sand ratios were obtained under different ultrasonic powers of backfill slurry. The results show that ultrasonic waves can significantly improve the rheological properties and reduce the plastic viscosity and yield stress of the backfilling slurry. The viscosity of backfill slurry can be reduced by ultrasonic waves from 4.32% to 39.33%, and the yield stress can be reduced from 9.66% to 34.27%. At the same time, the prediction model of rheological parameters of backfilling slurry was established by using support vector machine. The results of the prediction model show that the model has high precision and strong generalization ability. The prediction of rheological parameters of backfilling slurry under ultrasonic is realized.
引文
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[19]王志军,吕文生,杨鹏,王志凯,王金海.充填体强度的支持向量机设计匹配模型[J].金属矿山,2016,485(11):34-38.WANG Zhi-jun,LüWeng-sheng,YANG Peng,WANG Zhi-kai,WANG Jin-hai.Matching model of backfill strength design on support vector machines[J].Metal Mine,2016,485(11):34-38.
[2]焦华喆,王洪江,吴爱祥,吉学文,严庆文,李祥.全尾砂絮凝沉降规律及其机理[J].北京科技大学学报,2010,32(6):702-707.JIAO Hua-zhe,WANG Hong-jiang,WU Ai-xiang,JI Xue-wen,YAN Qing-wen,LI Xiang.Rule and mechanism of flocculation sedimentation of unclassified tailings[J].Journal of University of Science&Technology Beijing,2010,32(6):702-707.
[3]张海波,宋卫东.评述国内外充填采矿技术发展现状[J].中国矿业,2009,18(12):59-62.ZHANG Hai-bo,SONG Wei-dong.Discussion on the current state of backfill mining from the domestic and foreign development[J].China Mining Magazine,2009,18(12):59-62.
[4]李茂辉,高谦,南世卿.新型胶结材料全尾砂浆流变特性试验分析[J].矿业研究与开发,2013,33(2):15-17.LI Mao-hui,GAO Qian,NAN Shi-qing.Study on the rheological characteristics of total tailings slurry with new cementing material[J].Mining Research&Development,2013,33(2):15-17.
[5]刘晓辉.膏体流变行为及其管流阻力特性研究[D].北京:北京科技大学,2015.LIU Xiao-hui.Study on rheological behavior and pipe flow resistance of paste backfill[D].Beijing:University of Science and Technology Beijing,2015.
[6]LIDDEL P V,BOGER D V.Yield stress measurements with the vane[J].Journal of Non-Newtonian Fluid Mechanics,1996,63(2):235-261.
[7]SAAK A W,JENNINGS H M,SHAH S P.The influence of wall slip on yield stress and viscoelastic measurements of cement paste[J].Cement and Concrete Research,2001,31(2):205-212.
[8]BAUER W,N?TZEL D,WENZEL V,NIRSCHL H.Influence of dry mixing and distribution of conductive additives in cathodes for lithium ion batteries[J].Journal of Power Sources,2015,288(3):359-367.
[9]吴爱祥,焦华喆,王洪江,仪辉,李海豹,刘晓辉,刘斯忠.膏体尾矿屈服应力检测及其优化[J].中南大学学报(自然科学版),2013,44(8):3370-3376.WU Ai-xiang,JIAO Hua-zhe,WANG Hong-jiang,YI Hui,LI Hai-bao,LIU Xiao-hui,LIU Si-zhong.Yield stress measurements and optimization of Paste tailings[J].Journal of Central South University of Technology(Science and Technology),2013,44(8):3370-3376.
[10]刘同有.金川全尾砂膏体物料流变特性的研究[J].中国矿业,2001,10(1):17-21.LIU Tong-you.Rheologic characteristic of high density tailings slurry used for stowing in Jinchuan mine[J].China Mining Magazine,2001,10(1):17-21.
[11]黄玉诚,李晓明,耿向慧,石吉升,韩国伟.似膏体充填料浆流型和流态的研究[J].中国矿业,2009,18(4):96-98.HUANG Yu-cheng,LI Xiao-ming,GENG Xiang-hui,SHI Ji-sheng,HAN Guo-wei.Study on the rheological model and flow state of paste-like fill slurry[J].China Mining Magazine,2009,18(4):96-98.
[12]黄玉诚,孙恒虎.尾砂作骨料的似膏体料浆流变特性实验研究[J].金属矿山,2003,324(6):8-10.HUANG Yu-cheng,SUN Heng-hu.Experimental study on the rheological characteristic of paste-like slurry with tailings as aggregate[J].Metal Mine,2003,324(6):8-10.
[13]席细平,马重芳,王伟.超声波技术应用现状[J].山西化工,2007,27(1):25-29.XI Xi-ping,MA Chong-fang,WANG Wei.Application situation of ultrasonic technology[J].Shanxi Chemical Industry,2007,27(1):25-29.
[14]DU J H,MCLOUGHLIN R,SMART R S C.Improving thickener bed density by ultrasonic treatment[J].International Journal of Mineral Processing,2014,133:91-96.
[15]LI Y X,LI B Q.Study on the ultrasonic irradiation of coal water slurry[J].Fuel,2000,79(4):235-241.
[16]GUO Z,FENG R,ZHENG Y,FU X.Improvement in properties of coal water slurry by combined use of new additive and ultrasonic irradiation[J].Ultrasonics Sonochemistry,2007,14(5):583-588.
[17]CHU C P,CHANG B,LIAO G S,JEAN D S,LEE D J.Observations on changes in ultrasonically treated waste-activated sludge[J].Water Research,2001,35(4):1038-1046.
[18]王志凯,杨鹏,吕文生,汤寒松,宋世文,王志军.超声波作用下尾砂浆浓密沉降及放砂[J].工程科学学报,2017,39(9):1313-1320.WANG Zhi-kai,YANG Peng,LüWen-sheng,TANG Han-song,SONG Shi-wen,WANG Zhi-jun.Thickening sedimentation and sand discharge of tailings slurry under ultrasonic[J].Chinese Journal of Engineering,2017,39(9):1313-1320.
[19]王志军,吕文生,杨鹏,王志凯,王金海.充填体强度的支持向量机设计匹配模型[J].金属矿山,2016,485(11):34-38.WANG Zhi-jun,LüWeng-sheng,YANG Peng,WANG Zhi-kai,WANG Jin-hai.Matching model of backfill strength design on support vector machines[J].Metal Mine,2016,485(11):34-38.
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