摘要
采用卧式高能球磨机制备纳-微SiO_2粉末,首先利用离散单元法模拟了球磨设备搅拌桨尺寸改变时,研磨仓体内钢球与物料的相互碰撞情况,以及搅拌桨尺寸对SiO_2颗粒细化的影响,然后根据模拟结果开展了相应的实际试验。结果表明,试验验证结果与模拟仿真结果一致,球磨机搅拌桨叶片尺寸对SiO_2的颗粒细化具有重要影响;在球磨机转速为1 000～1 100 r/min、钢球直径3 mm、球料比15∶1的条件下,叶片规格尺寸为长度115 mm、宽度8 mm时,使用卧式高能搅拌磨机球磨90 min即可得到最终粒径在300～500 nm的纳-微SiO_2粉末。
Nano-micron SiO2 powder was prepared by horizontal high-energy ball milling. Firstly,the discrete element method was used to simulate the collision between the steel ball and the material in the grinding chamber when the size of the mixing paddle of the ball mill equipment was changed,and the size of the stirring paddle was refined for the SiO2 particles. Then carried out the corresponding actual test based on the simulation results. The results show that the test results are consistent with the simulation results. The size of the ball mill paddle blades has an important influence on the particle refinement of SiO2. In the case of a ball mill with a rotational speed of 1000 ~ 1 100 r/min,a steel ball diameter of 3 mm and a ball to material ratio of 15: 1,the blade size is 115 mm in length and 8 mm in width,and the horizontal high-energy mixing mill ball mill is used. Nano-micron SiO2 powder with a final particle size of 300 ~ 500 nm can be obtained in 90 min.
作者
王磊
蔡晓兰
吴灿
张爽
WANG Lei;CAI Xiao-lan;WU Can;ZHANG Shuang(Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China)
出处
《矿冶》
CAS
2019年第1期54-57,共4页
Mining And Metallurgy
