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对海南铁矿2740名接尘工人(尘肺患者44例)用寿命表法进行接尘量与尘肺发病关系的研究表明:尘肺发病概率与累积接尘量之间呈直线相关,若以工人一生工作30年,发病概率小于1%计,则年平均粉尘浓度在5.78～6.96mg/m~3。该矿矿尘平均游离SiO_2含量为8.82%。作者建议,赤铁矿粉尘的最高容许浓度应从现行10mg/m~3的卫生标准降至5mg/m~3。
The study on the relationship between the amount of dust taken and the incidence of pneumoconiosis in 2740 workers at the iron mine in Hainan Province (44 patients with pneumoconiosis) showed that there was a linear correlation between the probability of pneumoconiosis and the cumulative amount of dust, In 30 years, the probability of incidence is less than 1%, the annual average dust concentration is 5.78 ~ 6.96mg / m ~ 3. The ore dust free average SiO2 content of 8.82%. The authors suggest that the maximum allowable concentration of hematite dust should be reduced from the current 10 mg / m3 health standard to 5 mg / m3.