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Taylor 先生说,在过去的十年左右时间里,化学自硬砂的应用已经增多了。目前大约有百分之八十的铸造厂设法采用这种工艺。由于铸造中使用化学硬化砂,所以硅砂消耗量特别大.目前有二百五十万吨硅砂消耗在这种方法上。过去,化学硬化工艺所用的型砂只使用一次就扔掉。虽然砂子供应不会缺少,但由于运输费用不断增长,又加上抛弃旧砂而增加的费用可能促使更多的铸造厂开始考虑回收全部废砂。在过去几年里,回收方法己被采用。但回收设备不是专门为处理废砂而特殊设计的。未
Mr. Taylor said that in the past decade or so, the application of chemical self-hardening sand has increased. Currently about 80% of the foundries managed to adopt this process. Due to the use of chemically hardened sand in casting, the consumption of silica sand is particularly large, and 2.5 million tons of silica sand are currently consumed in this method. In the past, chemical hardening process sand used only once thrown away. While there will be no shortage of supplies of sand, the increased costs associated with transportation and the additional costs of discarding old sand may prompt more foundries to start considering the recycling of all the used sand. In the past few years, recycling methods have been adopted. However, recycling equipment is not specifically designed to deal with waste sand. not