高压辊磨机粉碎行为研究进展

高压辊磨机粉碎原理为层压粉碎，具有处理量大、节能高效等特点。与传统破碎方式相比，高压辊磨机粉碎产品细粒级含量高、微裂纹发育、矿物解离度高、邦德球磨功指数低，还有助于下游选别或浸出作业。随着辊面抗压强度和抗磨蚀性能不断增强，高压辊磨机已经广泛应用于冶金矿山领域，如金刚石与围岩解离、球团原料铁精矿预处理、金属矿磨前（超）细碎，（半）自磨工艺顽石破碎等。高压辊磨机的成功应用与其粉碎行为密切相关。文章依次从高压辊磨机的研发背景、工作原理、辊面压力分布、宏观粉碎过程、料床应力响应、粉碎产品特性等方面系统评述了高压辊磨机的粉碎行为，并分析了边缘效应和辊面磨损的产生机理、负面影响及其应对措施，旨在全面地阐述高压辊磨机粉碎行为。

Recent Progress in Comminution Behavior of High Pressure Grinding Rolls

Based on the breakage mechanism of inter-particle layers compression, high pressure grinding rolls (HPGR) is characteristic of high productivity, energy efficiency, etc. Compared with traditional crushing methods, comminution product from HPGR is also characterized as high content of fine-grained particles, sufficient development of micro-cracks, improved mineral liberation as well as low Bond ball mill work index. With the improvement in compressive strength and anti-abrasion properties of the roller surface materials in recent decades, HPGR has been widely used in metallurgical mines, such as diamond liberation, pellet feed grinding, pebble crushing in autogenous and semi-autogenous mill circuit, metallic mineral crushing before grinding, etc. Successful popularization of HPGR depends heavily on the comminution behavior. With the aim of a comprehensive insight into the comminution behavior of HPGR, the present work brings together the literatures in terms of the developed background, working principle, pressure distribution on roller surface, macro breakage processes of HPGR, where the stress behavior of particle bed and product feature in compressive bed breakage are also included. Finally, edge effect and roller surface abrasion of HPGR, as well as the associated generating mechanism and solutions were analyzed.