论文部分内容阅读
1970年以来,我国铸造工业使用七○砂(石灰石砂)代替石英砂造型,起到了消除矽尘危害和易于清砂的作用。但由于七○砂型浇注时产生大量 CO 气体,能使工人发生急性中毒,严重影响着七○砂的使用和推广。为了进一步肯定七○砂的价值,有效地予防CO 中毒,作者在太原重机厂铸钢车间进行了劳动卫生调查,分析了几种型砂的 SiO_2含量及部份使用七○砂后各主要工段空气中粉尘 SiO_2的平均含量;调查了历次发生的急性
Since 1970, the foundry industry in our country used 70 sand (limestone sand) instead of quartz sand to play the role of eliminating the harm of the silica dust and easing the sand cleaning. However, because of the large amount of CO gas generated during the pouring of the sand-70 sand, acute poisoning can occur to the workers and seriously affect the use and promotion of the sand. In order to further confirm the value of 70 sand and effectively prevent CO poisoning, the author conducted a survey of labor hygiene in the steel plant of Taiyuan Heavy Machinery Factory, analyzed the SiO 2 content of some sand and the air of each main section after the use of 70 sand The average dust content of SiO_2; investigated the occurrence of acute