一九七四年以来,我省冶金机械工业中推广使用一种新的型砂,即石灰石、白云石砂。对应用石灰石、白云石砂中的卫生学问题,各地曾做过一些研究,在动物实验中均未见肺的纤维化。日本高城靖夫用石灰石粉尘吸入法染尘家兔481天,见有慢性间质性肺炎肉芽肿性病灶及剥脱性卡他性炎症。为进一步探讨石灰石、白云石粉尘的致纤维化作用,一九七七年二月至一九七八年八月进行动物实 Since 1974, a new type of sand, namely limestone and dolomite sand, has been promoted in metallurgical machinery industry in our province. On the application of limestone, dolomite sand hygiene issues, have done some research in various places, in animal experiments were no lung fibrosis. Japanese high city Jingfu limestone inhalation dust-infected rabbits 481 days, see chronic interstitial pneumonia granulomatous lesions and exfoliative catarrhal inflammation. In order to further investigate the fibrogenic effect of limestone and dolomite dust, from February 1977 to August 1978,