摘要
旋流器是选煤厂的主要分选或分级浓缩设备。从旋流器工作原理出发,分析了旋流器内衬磨损的原因及磨损形式。固液两相流的高速旋转运动摩擦并伴有冲击破坏,是旋流器内衬损坏和磨损的主要原因;冲击磨损、微切削磨损是主要损坏形式。分析了旋流器内衬所用的金属和金属化合物、聚氨酯制品类和非金属耐磨材料类耐磨材料的特点,提出旋流器内衬材料的选取原则。聚氨酯类材料可用于内径≤350 mm的煤泥重介质旋流器和内径≤500 mm的水力旋流器;高铬铸铁类材料主要用于直径≤500 mm的浓缩旋流器;对于分选重介质旋流器应使用氧化铝类材料或增韧氧化铝或氮化硅陶瓷。
Cyclone is the main separation or concentration equipment in coal preparation plant.Based on the working principle of the cyclone,the causes and wear forms of the lining wear of the cyclone were analyzed.high-speed rotating friction of solid-liquid two-phase flow accompanied by impact damage is the main reason for the damage and wear of the cyclone lining.Impact wear and micro cutting wear are the main forms of wear damage of cyclone lining.The characteristics of metal and metal compounds,polyurethane products and non-metal wear-resistant materials used in the cyclone lining were analyzed in this paper,and the selection principle of the cyclone lining materials was proposed.Specifically,the polyurethane material can be used in the coal slurry heavy medium cyclone with an inner diameter less than350 mm,and the cyclone with an inner diameter less than 500 mm.The high chromium cast iron material is mainly used in the concentration cyclone with a diameter less than 500 mm,and the alumina material,toughened alumina or silicon nitride ceramics is recommended using in the separation heavy medium cyclone.
作者
梁浩
LIANG Hao(Test Branch of China Coal Research Institute,Beijing 100013,China)
出处
《洁净煤技术》
CAS
2018年第6期128-131,共4页
Clean Coal Technology
关键词
旋流器
磨损
内衬材料
选取原则
coal cyclone
wear factor
lining material
selection principle
