高炉用的300 公厘小风口水箱,在铸造技术上来讲是比较困难的。铸件要求用纯铜铸造(为了容易浇成,曾徵得炼铁厂的同意,允许加入2%以下的锡),铸件经加工后,必须能耐受每平方公分7公斤的水压试验。我厂以前在铸造这类铸件时,经常发 Blast furnace with 300 mm small outlet tank, in terms of casting technology is more difficult. The castings are required to be cast in pure copper (approved by the ironworks for ease of pouring, allowing 2% or less of tin to be added) and the castings must be able to withstand a hydrostatic pressure of 7 kg / cm². I plant in the casting of such castings, often made