基于正交试验的充填集料配比优化研究
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摘要
对某铜矿全尾砂和戈壁集料粒度进行了分析,结果表明,戈壁集料粒度分布区间广、粗颗粒含量高,全尾砂粒级偏细,将全尾砂添加至戈壁集料中可改善充填集料级配,从而提高料浆的流动性能。采用正交试验研究不同全尾砂-戈壁集料配比、料浆质量浓度和灰砂比条件下的料浆塌落度和泌水率,对试验结果进行方差分析,分析结果表明,浓度对料浆的塌落度值和泌水率影响最大,其次是充填集料配比,而灰砂比的影响很小;集料配比为25∶75、浓度为83%时,充填料浆的和易性及保水性能最佳,可有效避免充填料浆自流输送发生堵管事故。
The particle sizes of full tailings and gobi aggregates of a copper ore were analyzed.It was found that the gobi aggregates had wide particle size distribution,and high content of coarse grain,while the full tailings were fine.Adding the full tailings into gobi aggregates could improve the grading of filling aggregate,so as to improve the flow performance of slurry.The collapsbillity and bleeding rate of slurry under different full tailings-gobi aggregates proportions,mass concentrations and cement-sand ratios were studied by orthogonal test.The variance analysis of the test results showed that the mass concentration had the greatest influence on the slurry collapsbillity and bleeding rate,followed by the filling aggregate proportion,while the cement-sand ratio had little influence.When the filling aggregate proportion of full tailings and gobi aggregates was 25∶75,mass concentration was 83%,the workability and water retention performance of filling slurry were the best,and could effectively avoid the pipe blockage accidents of filling slurry in gravity flow transportation.
The particle sizes of full tailings and gobi aggregates of a copper ore were analyzed.It was found that the gobi aggregates had wide particle size distribution,and high content of coarse grain,while the full tailings were fine.Adding the full tailings into gobi aggregates could improve the grading of filling aggregate,so as to improve the flow performance of slurry.The collapsbillity and bleeding rate of slurry under different full tailings-gobi aggregates proportions,mass concentrations and cement-sand ratios were studied by orthogonal test.The variance analysis of the test results showed that the mass concentration had the greatest influence on the slurry collapsbillity and bleeding rate,followed by the filling aggregate proportion,while the cement-sand ratio had little influence.When the filling aggregate proportion of full tailings and gobi aggregates was 25∶75,mass concentration was 83%,the workability and water retention performance of filling slurry were the best,and could effectively avoid the pipe blockage accidents of filling slurry in gravity flow transportation.
引文
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[13]韩斌,吴爱祥,王贻明,等.低强度粗骨料超细全尾砂自流胶结充填配合比优化及应用[J].中南大学学报(自然科学版),2012,43(6):2357-2362.
[14]邓代强,高永涛,吴顺川,等.粗骨料胶结充填材料性能研究[J].昆明理工大学学报(理工版),2009,34(06):73-76.
[15]张修香,乔登攀.废石-尾砂高浓度料浆的流变特性及屈服应力预测模型[J].安全与环境学报,2015(4):278-283.
[2]刘丰韬,丁剑锋,陈国平,等.深井长距离大倍线高浓度自流充填技术研究[J].金属矿山,2014(2):40-44.
[3]李红,吴爱祥,王洪江,等.粗粒级膏体充填材料静动态抗离析性能表征[J].中南大学学报(自然科学版),2016,47(11):3909-3915.
[4]张修香,乔登攀.粗骨料高浓度充填料浆的管道输送模拟及试验[J].中国有色金属学报,2015,25(1):258-266.
[5]张钦礼,谢盛青,郑晶晶,等.充填料浆沉降规律研究及输送可行性分析[J].重庆大学学报,2011,34(1):105-109.
[6]董培鑫,杨志强,高谦,等.混合充填集料粒径与级配对料浆流动性影响[J].矿业研究与开发,2018,38(3):53-59.
[7]杨志强,王永前,高谦,等.金川镍矿混合充填集料胶结充填体强度试验研究[J].河南理工大学学报(自然科学版),2015,34(2):171-178.
[8]杨啸,杨志强,高谦,等.混合充填骨料胶结充填强度试验与最优配比决策研究[J].岩土力学,2016,37(S2):635-641.
[9]杨柳华,王洪江,吴爱祥,等.全尾砂戈壁集料膏体充填粒级优化[J].中国有色金属学报,2016,26(7):1552-1558.
[10]姚维信.矿山粗骨料高浓度充填理论研究与应用[D].昆明:昆明理工大学,2011.
[11]杨坚,尹土兵,刘科伟,等.全尾砂胶结充填体强度影响因素响应面法研究[J].中国安全科学学报,2017,27(12):103-109.
[12]赵国彦,杜雪鹏.块石胶结充填颗粒离析机理[J].中南大学学报(自然科学版),2012,43(8):3196-3199.
[13]韩斌,吴爱祥,王贻明,等.低强度粗骨料超细全尾砂自流胶结充填配合比优化及应用[J].中南大学学报(自然科学版),2012,43(6):2357-2362.
[14]邓代强,高永涛,吴顺川,等.粗骨料胶结充填材料性能研究[J].昆明理工大学学报(理工版),2009,34(06):73-76.
[15]张修香,乔登攀.废石-尾砂高浓度料浆的流变特性及屈服应力预测模型[J].安全与环境学报,2015(4):278-283.