moisture or rust that could cause spitting and splashing when put into contact with the metal bath. Preheating materials and tools will minimize this occurrence.
storing alloying materials. Ingot Addition
7 8
Splashing and spitting can occur when introducing ingots to the melt as condensation comes in contact with the molten metal. Ideally, clean, dry ingots should be placed only into an empty furnace or on top of solid foundry returns. Ingots added to molten metal should be preheated and introduced using a remote automatic charging system.
9
in contact with the molten metal in the bottom of the furnace. Bridging can cause superheating of the molten metal and lead to refractory failure and coolant system rupture. Bridging can be minimized by using proper charge materials, by ensuring different size charge ma- terials are added correctly to the furnace and vigilant operator awareness. If bridging occurs, all power must be turned off until the bath temperature is known. Follow the furnace manufacturer’s bridging safety procedures.
10 Bridging
“Bridging” occurs when cold charge materials in the top portion of an induction furnace are not
Ferrous Alloys
Ferro-alloy materials can absorb moisture from their surroundings. Follow the manufacturer’s instructions for
Cold Charge Tools
Tools such as skimmers, ladles, etc., pose a special hazard because they may contain a thin layer of surface
7 8
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低温的填料工具
诸如撇渣器，长柄勺等工具，可能因为其表面上 含有一层湿气或者铁锈，在与熔融金属接触时引 起扩散和飞溅，从而引起不确定的危险。预热原料和工 具能够最大程度地减少这种危险发生。
铁基合金
铁基合金材料能够吸收周围的湿气。因此需要根 据制造商的操作指南来保存。
添加铸锭
当在金属液中添加铸锭时，因为冷凝液与金属液 的接触，会产生飞溅和扩散。理想的清洁干燥的 铸锭应该只能放置于空熔炉中或者固体的铸造回炉料顶 部。铸锭加入前要预热，并采用远程自动控制系统进行 添加。
当感应炉顶部的低温填料和感应炉底部的金属 液没有接触时，就产生了“架桥”。架桥会造 成金属液过热，并导致无法挽回的缺陷和冷却系统爆裂。 使用正确的填料，确保正确地向熔炉中添加不同尺寸的填 料以及操作员高度警惕的 意识，这些能够最大程度 的减少架桥的发生。一旦 架桥发生，必须关闭所有 的电源，直至能够获知金 属液的温度。必须遵照熔 炉制造商提供的架桥安全 程序。
10 架桥
Always wear proper personal protective equipment when handling molten metal.
在处理金属液时一定要穿戴 正规的个人防护设备。
Fall 2011
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