论文部分内容阅读
上海第三钢铁厂铸钢车间1958年正式成立,年产钢约7万吨,铸钢件约2万吨。起初生产环境的粉尘浓度很高,以清砂为例,1961年之前平均437.2mg/m~3,1962～1980年平均为53.8～169.6mg/m~3,远远超过了国家的允许标准,造成矽肺患病率达15.4％,清砂工高达77.5％,发病工龄平均仅5.2年。 该车间1972年学习了铁道部戚墅堰机车辆厂先进经验,采用石灰石砂(含游离SiO_2仅2％左右)代替石英砂(含游离SiO_296.4％)造型,1974年推广使用,现已10年余,石灰石砂
Shanghai Steel III Steel Plant was officially established in 1958 with an annual output of about 70,000 tons of steel, castings of about 20,000 tons. At first, the dust concentration in the production environment was very high. Taking clear sand as an example, an average of 437.2 mg / m 3 before 1961 and an average of 53.8 to 169.6 mg / m 3 in 1962 to 1980 far exceeded the national allowable standards, Resulting in silicosis prevalence rate of 15.4%, sand cleaning workers up to 77.5%, the average length of service was only 5.2 years. The workshop in 1972 to learn the Ministry of Railways Qi Shuyan machine factory advanced experience using limestone sand (containing only about 2% of free Si02) instead of quartz sand (containing free SiO_296.4%) modeling, to promote the use of 1974, now more than 10 years , Limestone sand