摘要
采用QLM-1型流化床气流磨研究了分级机转数、气流压力以及物料加热预处理和分级预处理对硅灰石产品长径比的影响,并对其机理进行了分析。结果表明:在给料采用-2+0.9、-0.9+0.5、-0.5+0.2mm的窄粒级,分级机转速12 000 r/min,气流粉碎压力0.4 MPa的条件下,可获得长径比大于15的硅灰石针状粉;在粉碎过程中采用窄级别给料、使颗粒产生以摩擦和剪切为主的作用力,有助于保护硅灰石产品的晶型,提高长径比。
Effect of the rotate speed of classification wheel, air pressure and pre-heat or pre-classification for feed on the aspect ratio of wollatonite were studied in this paper using QLM-1fluidized bed opposed jet mill. The mechanisms of high aspect ratio wollatonite preparation were also analyzed. The results showed that the wollatonite product which aspect ratio was greater than15 could be prepared when the air pressure was 0. 4 MPa and the rotate speed of classification wheel was 12 000 r / min with single size feed which was-2 ＋ 0. 9,-0. 9 ＋ 0. 5 or-0. 5 ＋ 0. 2mm. The crystal structure could be protected and the aspect ratio of wollatonite could be improved when feed was single size and the main force acted on the feed particles was frictional force or shear force.
出处
《矿产保护与利用》
北大核心
2015年第1期49-53,共5页
Conservation and Utilization of Mineral Resources
基金
辽宁省科学事业公益研究基金(2012001003)
关键词
硅灰石
气流粉碎
晶型保护
窄级别给料
机理
wollatonite
fluidized bed opposed jet mill
crystal structure protection
single size feed
mechanism
