Question

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Water hardness is dangerous for the heat transfer between the casting ring and the cooling water. Service life of the casting ring also depends on the water hardness.
The chemical condition of the water significantly influences the cooling efficiency of the casting mould. Water classified as "chemically hard" cannot be used because calcium deposits form on the mould and belt.
This drastically reduces the heat transfer through the mould wall and belt. In addition, hard water deposits are tough and difficult to remove, even with acid.
The ‘soft’ or even ‘medium hard’ waters are satisfactory if the total hardness remains below 200 ppm during production.

Answer 1

水坚硬为热传递是危险的在铸造圈和凉水之间。 铸造圈的产品使用期限也取决于水坚硬。
水的化工情况极大影响铸型的冷却的效率。 被分类的水和，因为钙在模子和传送带，放置形式不可能“化工艰苦”使用。
这通过模子墙壁和传送带猛烈地减少热传递。 另外，硬水储蓄是坚韧和难去除，甚而与酸。
如果总坚硬依然是在200 ppm以下在生产期间， `软’甚至`中等坚硬’水是令人满意的。

Answer 2

水硬度太高对铸件环形和冷却水传热过程是危险的。使用寿命的因素也取决于水环硬度。
水的化学条件的显著影响散热效率的铸造模具。水列为“化学”不能使用,因为钙质沉淀物形成的模具和皮带。
这个大幅度降低了传热通过模具结晶器壁和皮带。此外,因为硬水沉积物是艰难的,难以清除,甚至带有酸腐蚀性。
“软”或“硬”水介质满意硬度为低于200 ppm。