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水玻璃砂在备厂已普遍应用,但它对原砂的水分要求较为严格,在冬天要求原砂中水分在1%以下。但实际上,往往为了防止硅尘飞扬,在运输和加工过程中,在天然砂与人造砂中加入水分,因此许多厂都采用铁板火坑来进行烘烤。我厂原来也采用这种方法,在烘烤过程中硅尘飞扬也很严重,工人劳动条件较差。同时,由于有的原砂粒度范围很大,内部含有多量的盘砂,直接使通气性下降,因此要求有一种既能干燥原砂,又能使硅尘不致飞扬,同时还能除去盘砂的原砂处理设备。
Sodium silicate sand in the preparation plant has been widely used, but it is more stringent water requirements of the original sand, the original requirements of the winter in the water below 1% moisture. In practice, however, it is often the case that many factories use baking pits for baking in order to prevent the flying of silica dust. In transportation and processing, moisture is added to natural sand and artificial sand. Our factory originally used this method, in the baking process, dust and silica are also very serious, poor working conditions of workers. At the same time, due to the large range of original sand particle size and the large amount of sand inside, which directly reduces the air permeability, it is required to have a method that can both dry the original sand and prevent it from flying up, and also remove the sand The original sand processing equipment.