挤压造粒机组模板切粒带部分合金脱落原因分析

Cause Analysis of Partial Alloy Peeling Off of Extrusion Granulator Template Pelleting Belt

挤压造粒机组是聚乙烯装置中的造粒设备,模板为挤压造粒机组的关键部件。模板使用周期短将严重制约挤压造粒机组的长周期运行。根据模板切粒带部分碳化钨合金剥落的实际情况,分析认为设备安装质量问题、切刀和模板硬度不匹配、设备操作不当、积屑瘤影响以及工艺条件影响等是造成模板切粒带部分合金脱落的主要原因。针对不同原因提出了延长模板使用寿命的优化措施。

The extrusion and granulation unit is the granulation equipment in the polyethylene plant,and the template is the key part of the extrusion and granulation machine.The short service life of the template will seriously restrict the long period operation of the extrusion granulation unit.According to the actual situation of part of tungsten carbide alloy spalling off in the template pelleting belt,it is analyzed that the main reasons of part of tungsten carbide alloy falling off in the template pelleting belt are the quality problem of equipment installation,the hardness mismatch between cutter and template,the improper operation of equipment,the influence of chip nodulation and the influence of technological conditions.The parameters should be optimized for different reasons to prolong the service life of the template.