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矽肺的发病:矽肺是由于较长期吸入含游离 SiO_2的生产粉尘所引起的疾病。矽肺的发生和发展,主要与粉尘中的游离 SiO_2含量、浓度,接触粉尘的时间长短、颗粒的大小(一般5μ以下直径的粉尘危害最大),劳动强度以及个体因素都有密切的直接关系。根据国际尘矽会议结论提出:在粉尘中 SiO_2含量大于18%时,其病理表现为矽肺,不超过18%时则为煤工尘肺(指煤矿工尘肺)。
Silicosis: Silicosis is a disease caused by longer-term inhalation of production dust containing free SiO 2. The occurrence and development of silicosis are closely related to the content of free SiO 2, the concentration of dust, the length of contact with dust, the size of particles (the dust with the diameter of less than 5μ), labor intensity and individual factors. According to the conclusions of the International Dust Silica Conference, it is proposed that when the content of SiO 2 in dust is more than 18%, the pathological manifestation is silicosis, while the coal dust (less than 18%) is coal worker’s pneumoconiosis.