电磁波预处理对黄铁矿碎磨经济性的试验分析
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摘要
为解决当前传统碎磨流程能耗高、效率低的问题,并结合电磁波选择性、整体性、高效性的加热特性,试验探究经不同时间电磁波预处理后的矿石进行破碎、磨矿过程中产量、能耗、粒度及效率等经济性指标的变化。试验结果表明,电磁波作用能够有效提高破碎产量,而产品粒度不受影响;能够有效降低磨矿产品加权平均粒度,降低磨矿时间。将矿石置于输出功率为800 W的电磁波场中预处理180～240s,能够有效提高碎磨产量及效率,降低流程能耗。如电磁波预处理240s时,比未预处理的碎磨流程节能5.96%,破碎产量提高57.84%,磨矿产量提高26.23%,碎磨经济性显著提高。
In order to solve the problem of high energy consumption and low efficiency in the current traditional crushing and grinding process,combined with the selectivity,integrality and efficient heating characteristics of the electromagnetic waves.The experiment explored the ore after the electromagnetic wave pretreatment at different times for crushing and grinding,changes in economic indicators such as production,energy consumption,granularity and efficiency during the process.The experimental results show that the electromagnetic wave effect can effectively improve the crushing yield,while the crushing granularity is not affected.It can effectively reduce the weighted average particle size of grinding products and reduce the grinding time.When the ore is heated in the electromagnetic field of 800 W for 180～240 s,it can effectively improve the grinding output and efficiency of crushing and grinding,and reduce the process energy consumption.For example,compared to the non-pretreated grinding process,the electromagnetic wave pretreatment for 240 scan save energy by 5.96%,improve the crushing yield by 57.84% and increase the grinding output by 26.23%.And the crushing and grinding economy is significantly improved.
In order to solve the problem of high energy consumption and low efficiency in the current traditional crushing and grinding process,combined with the selectivity,integrality and efficient heating characteristics of the electromagnetic waves.The experiment explored the ore after the electromagnetic wave pretreatment at different times for crushing and grinding,changes in economic indicators such as production,energy consumption,granularity and efficiency during the process.The experimental results show that the electromagnetic wave effect can effectively improve the crushing yield,while the crushing granularity is not affected.It can effectively reduce the weighted average particle size of grinding products and reduce the grinding time.When the ore is heated in the electromagnetic field of 800 W for 180～240 s,it can effectively improve the grinding output and efficiency of crushing and grinding,and reduce the process energy consumption.For example,compared to the non-pretreated grinding process,the electromagnetic wave pretreatment for 240 scan save energy by 5.96%,improve the crushing yield by 57.84% and increase the grinding output by 26.23%.And the crushing and grinding economy is significantly improved.
引文
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[3]戴俊,孟振,吴丙权.微波照射对岩石强度的影响研究[J].有色金属(选矿部分),2014(3):54-57.DAI Jun,MENG Zhen,WU Bingquan.Study on the influence of microwave irradiation on rock strength[J].Nonferrous Metals(Mineral Processing Section),2014(3):54-57.
[4]蔡美峰,何满朝,刘东燕.岩石力学与工程[M].北京:科学出版社,2013:1-62.CAI Meifeng,HE Manchao,LIU Dongyan.Rock mechanics and engineering[M].Beijing:Science Press,2013:1-62.
[5]康健,赵明鹏,梁冰.高温下岩石力学性质的数值试验研究[J].辽宁工程技术大学学报(自然科学版),2005,24(5):683-685.KANG Jian,ZHAO Mingpeng,LIANG Bing.Numerical experimental study on mechanical properties of rocks at high temperature[J].Journal of Liaoning Technical University(Natural Science Edition),2005,24(5):683-685.
[6]FERRI HASSANI,PEJMAN M.NEKOOVAGHT,et al.The influence of microwave irradiation on rocks for microwaveassisted underground excavation[J].Journal of Rock Mechanics and Geotechnical Engineering,2016(8):1-15.
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[8]陈炳辰.磨矿原理[M].北京:冶金工业出版社,1989:121-216.CHEN Bingchen.Principle of grinding[M].Beijing:Metallurgical Industry Press,1989:121-216.