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通过对鞍钢耐火材料公司矽砖、粘土车间４５ 年的粉尘危害调查分析， 结果表明，粉尘浓度由５０ 年代４５－５ ｍｇ／ｍ ３ 下降到８０ 年代的１－６ ｍｇ／ｍ ３ ， １９５１ ～１９９５ 年共检出矽肺１ ０２５人， １９６３ 年以前矽肺检出率较高， 波动在５－３０ ％ ～５０－００ ％ ， 从１９６３ 年开始下降明显， １９８８年以后矽肺检出率全部降到１－００ ％ 以下。矽肺发病工龄、发病年龄、死亡年龄逐年代延长，到９０ 年代前期分别延长到２９－３６ 年、５７－２０ 岁、６５－７０ 岁。６０ 年代开始接尘者矽肺发病明显减少， ７０ 年代接尘者至今无一例矽肺发生
Through the investigation and analysis of 45-year dust hazard of alumina brick and clay workshop of Ansteel Refractory Company, the results showed that the dust concentration decreased from 45-5 mg / m 3 in the 1950s to 1-6 mg / m 3 and 1951-1955 in the 1980s A total of 1 025 silicosis was detected in the year before 1963. The detection rate of silicosis was higher and fluctuated between 5-30% and 50-00% before 1963, and it dropped significantly from 1963. The detection rate of silicosis dropped to 1- 00% the following. The length of service, the age of onset and the age of death of silicosis were prolonged year by year. By the early 1990s, they were extended to 29-36, 57-20 and 65-70 respectively. In the 1960s, the incidence of silicosis was significantly reduced, and so far there was no case of silicosis in the 1970s