多金属硫化矿的多尺度冲击破碎特性（英文）
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摘要
采用工艺矿物学测试仪(MLA)和落重试验研究锡石多金属硫化矿和铅锌多金属硫化矿石在冲击破碎过程中破碎能量、矿石硬度和矿石粒度对矿石破碎特性的影响规律。结果表明:除锡石外,两种矿石均含有用矿物磁黄铁矿、闪锌矿、脆硫锑铅矿、脉石矿物云母和石英。锡石与硫化矿物、石英等紧密连生形成集合体,相互混杂以交生或共生的浸染状细粒产出。锡石显著影响矿石破碎特性;矿石硬度与破碎参数A和b的乘积A×b值呈负相关,破碎细度受破碎能的影响,其大小与破碎参数A和b有关,其影响程度随A的增大而增大。当破碎能ECS低于1 kW·h/t时,其影响程度随b的增大而增大;当破碎能ECS高于1 kW·h/t时,其影响程度随b增大而减小。当破碎能较低时,相对于矿石粒度,破碎能对矿物破碎细度影响更大;当破碎能较高时,相对于破碎能,矿石粒度对矿物破碎细度影响更大。
The effects of crushing energy, ore hardness and particle size of cassiterite polymetallic sulphide ore and lead-zinc polymetallic sulphide ore on the crushing characteristics during impact crushing were investigated by mineral liberation analyzer(MLA) and drop weight test. The results show that both ores contain pyrrhotite, sphalerite, jamesonite, gangue mica and quartz except cassiterite. Cassiterite is closely associated with sulphide and quartz to form aggregates, which are mixed with each other in the form of intergrowth or symbiotic disseminated fine grains. Cassiterite has a significant impact on ore crushing characteristics. Ore hardness is negatively correlated with the product of crushing parameters of A and b, i.e. A×b, the effect of crushing energy on crushing fineness is related to crushing parameters A and b, and the influence degree increases with the increase of A. The influence degree increases with the increase of b when crushing energy ECS is less than 1 kW·h/t, and the influence degree decreases with the increase of b when crushing energy ECS is greater than 1 kW·h/t. The impact of crushing energy on crushing fineness is greater than that of ore particle size when the crushing energy is lower; on the contrary, the impact of ore particle size on crushing fineness is greater than that of crushing energy when crushing energy is higher.
The effects of crushing energy, ore hardness and particle size of cassiterite polymetallic sulphide ore and lead-zinc polymetallic sulphide ore on the crushing characteristics during impact crushing were investigated by mineral liberation analyzer(MLA) and drop weight test. The results show that both ores contain pyrrhotite, sphalerite, jamesonite, gangue mica and quartz except cassiterite. Cassiterite is closely associated with sulphide and quartz to form aggregates, which are mixed with each other in the form of intergrowth or symbiotic disseminated fine grains. Cassiterite has a significant impact on ore crushing characteristics. Ore hardness is negatively correlated with the product of crushing parameters of A and b, i.e. A×b, the effect of crushing energy on crushing fineness is related to crushing parameters A and b, and the influence degree increases with the increase of A. The influence degree increases with the increase of b when crushing energy ECS is less than 1 kW·h/t, and the influence degree decreases with the increase of b when crushing energy ECS is greater than 1 kW·h/t. The impact of crushing energy on crushing fineness is greater than that of ore particle size when the crushing energy is lower; on the contrary, the impact of ore particle size on crushing fineness is greater than that of crushing energy when crushing energy is higher.
引文
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[14] YAN Wei-ping. Flotation technology for fine cassiterite carrier[D].Ganzhou:Jiangxi University of Science and Technology, 2011.(in Chinese)
[15] NAPIERMUNN T J. Mineral comminution circuits their operation and optimization[M]. Brisbane:JKMRC and the University of Queensland Publishing, 2005.
[16] NADOLSKI S, KLEIN B, KUMAR A, DAVAANYAM Z. An energy benchmarking model for mineral comminution[J]. Minerals Engineering, 2014, 65:178-186.
[2] LI Zhao, CHEN Min, HUANG Peng-wu, ZHANG Qi-wu, SONG Shao-xian. Effect of grinding with sulfur on surface properties and floatability of three nonferrous metal oxides[J]. Transactions of Nonferrous Metals Society of China, 2017, 27(11):2474-2480.
[3] JIANG Lin-ling. The population balance dynamic models of cassiterite polymetallic sulphide ore is established based on the JK drop weight test[D]. Nanning:Guangxi University, 2014.(in Chinese)
[4] SCHMIDT J, PLATA M, TROGER S, PEUKERT W. Production of polymer particles below 5μm by wet grinding[J]. Powder Technology, 2012, 228:84-88.
[5] FUERSTENAU D W, PHATAK P B, KAPUR P C, ABOUZEID A Z M. Simulation of the grinding of coarse/fine(heterogeneous)systems in a ball mill[J]. International Journal of Mineral Processing, 2011,99:32-36.
[6] BAZIN C, OBIANG P. Should the slurry density in a grinding mill be adjusted as a function of grinding media size[J]. Minerals Engineering, 2007, 20:810-814.
[7] MATIJASIC G, KURAJICA S. Grinding kinetics of amorphous powder obtained by sol-gel process[J]. Powder Technology, 2010,197:165-168.
[8] SALAZAR J S, BARRIOS G P, RODRIGUEZ V, TAVARES L M.Mathematical modeling of a vertical shaft impact crusher using the Whiten model[J]. Minerals Engineering, 2017, 111:222-228.
[9] GHORBANI Y, MAINZA A N, PETERSEN J, BECKER M,FRANZIDIS J P, KALALA J T. Investigation of particles with high crack density produced by HPGR and its effect on the redistribution of the particle size fraction in heaps[J]. Minerals Engineering, 2013,43:44-51.
[10] OZGUR O, NAMIK A A, HAKAN B. Effect of operational parameters and recycling load on the high pressure grinding rolls(HPGR)performance[J]. International Journal of Mineral Processing,2015, 136:20-25.
[11] GENC O, BENZER A H. Single particle impact breakage characteristics of clinkers related to mineral composition and grindability[J]. Minerals Engineering, 2009, 22:1160-1165.
[12] HUKKI R T. Proposal for a solomnic settlement between the theories of von Rittinger, Kick and Bond[J]. Transactions of the AIME, 1962,223:403-408.
[13] SHI F. A review of the applications of the JK size-dependent breakage model. Part 1:Ore and coal breakage characterization[J].International Journal of Mineral Processing, 2016, 155:188-129.
[14] YAN Wei-ping. Flotation technology for fine cassiterite carrier[D].Ganzhou:Jiangxi University of Science and Technology, 2011.(in Chinese)
[15] NAPIERMUNN T J. Mineral comminution circuits their operation and optimization[M]. Brisbane:JKMRC and the University of Queensland Publishing, 2005.
[16] NADOLSKI S, KLEIN B, KUMAR A, DAVAANYAM Z. An energy benchmarking model for mineral comminution[J]. Minerals Engineering, 2014, 65:178-186.
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