钢球级配对铁矿石的磨矿动力学研究
|
摘要
以4种不同级配(m40∶m30∶m20=1∶1∶1、1∶1∶3、1∶3∶1、3∶1∶1)的钢球为研究对象,基于总体平衡模型开展磨矿动力学试验,研究了不同钢球级配对铁矿石的破碎规律,确定了5种单粒级(-13.2+9.5、-6.5+4.75、-3.35+2.36、-1.7+1.18、-0.6+0.425 mm)矿石在不同钢球级配下的比破碎速率。结果表明,铁矿石破碎规律不符合一阶磨矿动力学,比破碎速率随磨矿时间的增加而减小;级配为3∶1∶1的钢球对-13.2+9.5、-6.5+4.75 mm粒级矿石的破碎效果优于其他级配的破碎效果;级配为1∶1∶3的钢球在给料粒度大于3.35 mm时磨矿效果较差,在给料粒度小于1.7 mm时磨矿效果最好。
To determine the effect of the ball size distribution on the breakage behavior of iron ore,five kind of mono-size particles(-13. 2 + 9. 5、-6. 5 + 4. 75、-3. 35 + 2. 36、-1. 7 + 1. 18、-0. 6+ 0. 425 mm) were used with four ball size distributions( m40∶ m30∶ m20= 1∶ 1∶ 1、1∶ 1∶ 3、1∶ 3∶ 1、3∶ 1∶ 1).The specific breakage rates were determined. Results show that the behavior of iron ore breakage didn' t accord with the first-order grinding dynamics,and specific breakage rate decreased with the increase of time. The grinding performance of-13. 2 + 9. 5、-6. 5 + 4. 75 mm was the best using the ball size distribution of 3∶ 1∶ 1. The grinding performance of the ball size distribution of 1∶ 1∶ 3 was the worst when the ore particles size was more than 3. 35 mm. While the grinding performance was the best when the ore particles size was less than 1. 7 mm.
To determine the effect of the ball size distribution on the breakage behavior of iron ore,five kind of mono-size particles(-13. 2 + 9. 5、-6. 5 + 4. 75、-3. 35 + 2. 36、-1. 7 + 1. 18、-0. 6+ 0. 425 mm) were used with four ball size distributions( m40∶ m30∶ m20= 1∶ 1∶ 1、1∶ 1∶ 3、1∶ 3∶ 1、3∶ 1∶ 1).The specific breakage rates were determined. Results show that the behavior of iron ore breakage didn' t accord with the first-order grinding dynamics,and specific breakage rate decreased with the increase of time. The grinding performance of-13. 2 + 9. 5、-6. 5 + 4. 75 mm was the best using the ball size distribution of 3∶ 1∶ 1. The grinding performance of the ball size distribution of 1∶ 1∶ 3 was the worst when the ore particles size was more than 3. 35 mm. While the grinding performance was the best when the ore particles size was less than 1. 7 mm.
引文
[1]吴彩斌,周意超,程长敏.不同接触方式磨矿介质的钨矿磨矿动力学分析[J].有色金属工程,2016,6(4):58-62.
[2]SIMBA K P,MOYS M H.Effects of mixtures of grinding media of different shapes on milling kinetics[J].Minerals engineering,2014,61(6):40-46.
[3]张国范,冯其明,陈启元,等.铝土矿选择性磨矿中磨矿介质的研究[J].中南大学学报(自然科学版),2004,35(4):552-556.
[4]QIAN H Y,KONG Q G,ZHANG B L.The effects of grinding media shapes on the grinding kinetics of cement clinker in ball mill[J].Powder technology,2013,235(2):422425.
[5]IPEK H.Effect of grinding media shapes on breakage parameters[J].Particle&particle systems characterization,2007,24(3):229-235.
[6]侯英,丁亚卓,印万忠,等.磨矿动力学参数对磨矿速度的影响[J].东北大学学报(自然科学版),2013,34(5):708-711.
[7]程旭,武豪杰,王泽红.介质制度对磨矿过程影响的研究进展[J].金属矿山,2013,42(9):104-107.
[8]KATUBILWA F M,MOYS M H.Effect of ball size distribution on milling rate[J].Minerals engineering,2009,22(15):1283-1288.
[9]阮华东,王肖江,肖庆飞.钢球级配对球磨机磨矿效果影响试验[J].现代矿业,2016(6):48-49.
[10]张胜东,童雄,张翼,等.基于BP人工神经网络的球磨机钢球配比预测模型[J].武汉工程大学学报,2016,38(3):299-307.
[11]BILGILI E.Population balance modeling of non-linear effects in milling processes[J].Powder technology,2005,153(1):59-71.
[12]PRASHER C L.Crushing and grinding process handbook[M].Wiley:chichester,1987.
[13]王晓丽.铝土矿连续球磨过程建模与关键参数优化[D].长沙:中南大学,2011.
[14]AUSTIN L G.Introduction to the mathematical description of grinding as a rate process[J].Powder technology,1971,5(1):1-17.
[15]AUSTIN L G,BAGGA P.An analysis of fine dry grinding in ball mills[J].Powder technology,1981,28(1):83-90.
[16]AUSTIN L G,SHAH J,WANG J,et al.An analysis of ball-and-race milling.Part I.The hardgrove mill[J].Powder technology,1981,29(2):263-275.
[17]TANGSATHITKULCHAI C.Acceleration of particle breakage rates in wet batch ball milling[J].Powder technology,2002,124(1):67-75.
[2]SIMBA K P,MOYS M H.Effects of mixtures of grinding media of different shapes on milling kinetics[J].Minerals engineering,2014,61(6):40-46.
[3]张国范,冯其明,陈启元,等.铝土矿选择性磨矿中磨矿介质的研究[J].中南大学学报(自然科学版),2004,35(4):552-556.
[4]QIAN H Y,KONG Q G,ZHANG B L.The effects of grinding media shapes on the grinding kinetics of cement clinker in ball mill[J].Powder technology,2013,235(2):422425.
[5]IPEK H.Effect of grinding media shapes on breakage parameters[J].Particle&particle systems characterization,2007,24(3):229-235.
[6]侯英,丁亚卓,印万忠,等.磨矿动力学参数对磨矿速度的影响[J].东北大学学报(自然科学版),2013,34(5):708-711.
[7]程旭,武豪杰,王泽红.介质制度对磨矿过程影响的研究进展[J].金属矿山,2013,42(9):104-107.
[8]KATUBILWA F M,MOYS M H.Effect of ball size distribution on milling rate[J].Minerals engineering,2009,22(15):1283-1288.
[9]阮华东,王肖江,肖庆飞.钢球级配对球磨机磨矿效果影响试验[J].现代矿业,2016(6):48-49.
[10]张胜东,童雄,张翼,等.基于BP人工神经网络的球磨机钢球配比预测模型[J].武汉工程大学学报,2016,38(3):299-307.
[11]BILGILI E.Population balance modeling of non-linear effects in milling processes[J].Powder technology,2005,153(1):59-71.
[12]PRASHER C L.Crushing and grinding process handbook[M].Wiley:chichester,1987.
[13]王晓丽.铝土矿连续球磨过程建模与关键参数优化[D].长沙:中南大学,2011.
[14]AUSTIN L G.Introduction to the mathematical description of grinding as a rate process[J].Powder technology,1971,5(1):1-17.
[15]AUSTIN L G,BAGGA P.An analysis of fine dry grinding in ball mills[J].Powder technology,1981,28(1):83-90.
[16]AUSTIN L G,SHAH J,WANG J,et al.An analysis of ball-and-race milling.Part I.The hardgrove mill[J].Powder technology,1981,29(2):263-275.
[17]TANGSATHITKULCHAI C.Acceleration of particle breakage rates in wet batch ball milling[J].Powder technology,2002,124(1):67-75.