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对某钨矿浮选厂工作场所矽尘(呼尘)短时间接触浓度、时间加权平均浓度进行整改前和整改后的配对比较。整改后的C STEL、C TWA明显低于整改前,C STEL超限倍数合格率高于整改前。职业健康体检未检出尘肺,常规体检高血压患病率高于对照组。该企业进一步完善职业病防护设施后,厂区作业场所粉尘污染情况得到明显改善。
For a tungsten ore flotation plant workplace silica dust (dust) short-term exposure to concentration, time-weighted average concentration before rectification and rectification after the match. After rectification C STEL, C TWA was significantly lower than before rectification, C STEL exceed limit multiple pass rate higher than before rectification. Occupational health examination did not detect pneumoconiosis, the prevalence of routine physical examination hypertension was higher than the control group. After further improvement of occupational disease prevention facilities, the company’s dust pollution in workplaces at the plant area has been significantly improved.