铸造车间的旧砂气力吸送,近年来得到广泛的应用。它不但能使设备安装紧凑,节约投资,并能提高型砂的质量,更重要的是能使砂粒在负压下输送,减少了扬尘点,把含尘气体集中在尾部,为集中收尘创造了条件。为了推广这项先进技术,总结已有的经验,我组会同一机部第八设计院的同志,对北 The old sand in the foundry workshop has been widely used in recent years. It can not only make the equipment compact, save investment, and can improve the quality of the sand, more importantly, the sand can be transported under negative pressure, reducing the dust spots, the dust gas concentration in the tail, creating a focus on dust collection condition. In order to promote this advanced technology, summarize the existing experience, I set the same unit with the eighth Design Institute comrades, North