一般认为接触石灰石粉尘不会发生尘肺。然而,有人报告在长期接触高浓度石灰石粉尘的工人中检出了矽肺病例。但这些工人所接触的石灰石中夹杂5～15％的石英。作者推测,碳酸钙在肺内溶解后剩下的残留物中含有较多量石英,它可能是引起矽肺的原因。假如这种解释正确,那么接触纯石灰石的工人中就不应有矽肺发生。为检验这种想法是否合适,作者对长时间接触高浓度纯 It is generally believed that contact with limestone dust will not occur pneumoconiosis. However, some cases of silicosis have been reported in workers exposed to prolonged exposure to high concentrations of limestone dust. However, these workers come in contact with limestone 5 to 15% quartz. The authors speculate that the residual calcium carbonate dissolved in the lung contains a greater amount of quartz, which may be the cause of silicosis. If this interpretation is correct, there should be no silicosis in workers exposed to pure limestone. To test whether this idea is appropriate, the authors are exposed to prolonged exposure to high concentrations of pure