Chassix melt main- tenance manager Shawn Murray backed the use of grooved pipe connectors on the new pumping module for ease in pump installation and replacement.
Chassix公司熔炼设备 维护经理Shawn Mur- ray支持使用槽管接口 连接新泵，以方便泵的 安装和更换。
Designing an Induction Melt Cooling System Very small induction furnaces used in labs or for melt-
ing small quantities of precious metals may be cooled by direct connection to an incoming city water line and use a city drain for the outflow. Most other size furnaces require a pump or pumps to push cooling water through the fur- nace and a cooling tower of some kind to remove the heat from the water, which is then recirculated back through the furnace. Tis is the basis of most cooling systems. To design a cooling system for an induction melt shop,
first you must determine the heat load on the system, taking into account the size of each furnace, the power applied, the metal melted, type of melting (batch or heel), holding and pouring times and the heat loads added by non-furnace ancillary equipment. Tese calculations can be complex. Te new cooling
system for Chassix was based on heat load calculations for the facility’s wide variety of furnace sizes, melting processes and ancillary equipment used to support them. Tese included: • Three 12.5-metric-ton, medium frequency induction batch melting furnaces.
• Five 10-ton line frequency induction heel melting furnaces.
• Two 17-ton line frequency induction heel melting furnaces.
• Ancillary systems including air compressors, hydraulic pumps and air conditioners. Te calculations also had to take into account the need
for backup capacity to maintain cooling during equipment maintenance or repair and to support future growth. “I was looking for a new cooling system that would be
reliable and offer the redundancy to enable it to continue running even with a pump failure,” Burton said. “I also wanted a system that would provide not just the capacity to cool all of our furnaces and equipment running at the same time, but that would have the additional capacity to support anticipated future growth.” Te next step in the overall cooling system design is to
make adjustments for the desired incoming water tem- perature from the tower to the process, the outgoing water temperature from the process to the tower and the climatic data for the foundry location.
环境问题。” 设计感应熔炼的冷却系统
用于实验室或用于熔化少量贵金属的非常小的感应 炉可通过直接连接引入自来水冷却，排水可以使用城 市排水管道。大多数其他规格的感应炉需要1个或多 个泵来驱动冷却水从炉体流向冷却塔，被冷却塔以某 种方式带走热量的水，再循环回到炉体中。这是大多 数冷却系统的基本方式。
要为感应熔炼车间设计冷却系统，首先必须确定 系统的热负荷，同时要考虑每台炉子的大小，电力应 用，熔化的金属类型，熔炼方式（倒空或剩余），保 温和浇注时间及不属于炉体的其他辅助设备所增加的 热负荷。
这些计算可能很复杂。Chassix公司新的冷却系 统，是根据车间内各种炉型的规格，熔炼工艺及配套 设备的热负荷计算。这些设备包括： • 3台12.5吨，中频感应熔化炉。 • 5台10吨工频感应熔化炉。 • 2台17吨工频感应熔化炉。 • 辅助系统包括空气压缩机，液压泵站和空调。 计算还要考虑到设备维护或修理期间冷却所需的备 用容量以及支持未来的增长。
“我一直在寻找新的冷却系统，它必须是可靠的， 并能留有富余量，使其能够在1台泵故障的情况下继 续运行，”Burton说，“我还希望系统将不仅提供目 前所有的熔化炉和设备同时运行所需的冷却能力，而 且必须支持未来预期增长的额外容量。” 下一步，整个冷却系统设计是对所希望的从冷却塔 到管道的进水温度、从管道到冷却塔的出水温度和气 候条件以及炉体上温度参数进行调整。
冷却塔 冷却塔有3种基本冷却方式，蒸发式，干燥空气冷 62 |
FOUNDRY-PLANET.COM | MODERN CASTING | CHINA FOUNDRY ASSOCIATION September 2014
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