铁红(俗称红土)是用作铁红底漆和装饰建筑物墙壁等的原料。1985～1989年我们在63名铁红生产工人体检中发现12例尘肺,兹报告如下。 一、一般情况 铁红的化学组成:氧化铁83.64％,二氧化硅9.15％,氧化铝3.85％,另外还有酸不溶物,少量的钙、镁、铜、镍、钴等。铁红成品粉末的分散度0.3 Iron red (commonly known as laterite) is used as iron red primer and decorative building walls and other raw materials. From 1985 to 1989, we found 12 cases of pneumoconiosis in the examination of 63 iron-red production workers. We hereby report the following. First, the general red iron chemical composition: iron oxide 83.64%, 9.15% silica, alumina 3.85%, in addition to acid insoluble, a small amount of calcium, magnesium, copper, nickel, cobalt and so on. Dispersion of finished iron powder 0.3