摘要
通过对热喷涂现场粉尘进行采样和监测,分析了热喷涂粉尘的质量浓度、粒径分布、微观形貌及成分组成等理化特性,依此评估热喷涂粉尘潜在的危害。结果表明:热喷涂作业区域粉尘浓度普遍高于职业卫生标准规定的浓度限值;热喷涂粉尘粒径分布范围广,其中包含大量的微纳米粉尘颗粒,这些超细颗粒粉尘由于质量轻,受重力影响小,很难自然沉降,清除周期较长;粉尘含有多种金属元素,包括一些重金属,如铬、镍、铜等。这些特性决定了热喷涂粉尘危害的严重性,因此有必要采取保护措施减少其对从业人员的危害。
Through sampling and monitoring of dusts in the field of thermal spraying, the mass concentration, particles size distribution, micro - morphology and composition of the dusts are analyzed and the potential hazards of these dusts are evaluated. The results show that the dust concentrations in the thermal spray workshops are generally higher than the national standard limits. These dusts distribute in a wide range of size, including lots of miero/nano - particles, difficult to be cleared and suspended in the air of the workshop for a long time, due to their light weight and small gravity effect. A variety of metal elements are contained in these dusts, including some heavy metals, such as chromium, nickel and copper. These characteristics of dusts in the thermal spray process determine the seriousness of occupational hazards. Therefore, it is necessary to take measures to reduce or eliminate the damages caused by the dusts in the thermal spray process to workers.
作者
李海军
李新宇
黄海鸿
詹绍义
LI Haijun LI Xinyu HUANG Haihong ZHAN Shaoyi(School of Mechanical and Automotive Engineering, Hefei University of Technology Hefei 23000)
出处
《工业安全与环保》
北大核心
2017年第3期56-59,共4页
Industrial Safety and Environmental Protection
基金
国家自然科学基金青年科学基金(51405120)
关键词
热喷涂
粉尘
职业危害
纳米毒性
防护
thermal spraying dust occupational hazards toxicity of nanoparticles protection
