摘要
石墨选别的主要目标是在获得高品位精矿的同时保护其大鳞片结构,降低大鳞片石墨损失率,石墨的片层结构特点要求再磨擦洗以剪切摩擦作用为主,减少轴向交错运动并避免冲击。基于离散单元法进行计算机仿真,分析比较了不同结构形式搅拌装置作用下介质运动特性,探明棒式搅拌结构作用下介质周向运动强,轴向运动弱,主轴转速是影响介质运动速度的主要因素,有效作用范围主要集中于搅拌棒临近区域,提出"大直径、小层距、临层错角"的设计方案,解决了有效作用范围相对较小的问题。工业中棒式搅拌磨机与现场原有设备前后对比,再磨前后精矿品位提升值提高1%~4%,+150μm大片石墨损失率降低3%~5%,是一种更优的石墨再磨擦洗设备。
The main goal of graphite beneficiation is to get high grade concentrate, and protect its large flake, reduce the large flake graphite loss rate simultaneously, Graphite is a lamellar structure, and the re-grinding scrubbing require more Shearing friction, less movement axially staggered to avoid shocks, the motion characteristics of media under the action of different stirring device structure was analyzed, based on DEM, the circumferential movement is strong and axial movement is weak, under the action of bar stirring device, the shaft speed is the main factor affecting the velocity of the media, the effective grinding volume mainly concentrate on the area around the stirring bars. The proposed design scheme of ＂large diameter, smaller layer distance and adjacent layer angle＂ solved out the problem that effective range are relatively smaller. In the graphite processing plant, comparison between bar stirred mill and the original equipment show that： the grade of concentrate increase by 1% -4%, the yield ＋ 150 μm increased 3% -5%, meanwhile, which is a kind of better graphite grinding equipment.
作者
何建成
孙小旭
姚建超
周宏喜
HE Jiancheng1,2 SUN Xiaoxu1,2, YAO Jianchao1,2 , ZHOU Hongxi1,2(1. BGRIMM Technology Group, Beijing 100160, China ; 2. BGRIMM Machinery and Automation Technology Co. , LtcL , Beijing 100160, Chin)
出处
《有色金属（选矿部分）》
CAS
北大核心
2018年第2期78-81,共4页
Nonferrous Metals（Mineral Processing Section）
基金
国家自然科学基金资助(51604027
51674033)
关键词
石墨
大鳞片
擦洗
介质运动特性
搅拌装置
graphite
big flake
scrubbing
media motion character
agitator
