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Induction Furnace - Water Problems

posted Mar 22, 2012, 5:03 PM by Sanjay Ganguly   [ updated Mar 22, 2012, 5:33 PM ]
 
In today's core less Induction Melting Systems, water is critical to the cooling of power supplies and furnaces.   

But to ensure efficient coreless induction furnace water systems and melt campaigns, you need 
  • quality water
  • regular treatment 
  • proper filtration
Lets understand why?

Although the water system's main function is furnace cooling, but its efficiency can be affected due to poor water quality. 

Poor water quality leads to

Low cooling rate: A reduction in the heat transfer in the water-cooling passages may be caused by scale formation or fouling due to products of corrosion or biological growth.
When this fouling does occur, the temperature difference between the water and the component will increase to maintain the same heat transfer rate. So this reduces the water system's ability to transfer heat and keep the furnace components cool. As the fouling continues to build up, the temperature increases and the component fails. This process is further aggravated by the reduction of water flow caused by the reduction in the cross sectional area.

Electrochemical corrosion of tubing: Electrochemical corrosion is the deterioration of solids by liquid electrolytes. In this case, the electrolyte is the contaminated cooling water, which attacks metal components in the system. Under severe corrosive conditions, the components can corrode or rust in less than 1 year.

Degradation of electrical performance of the melting equipment: This is due to the water having too high an electrical conductivity. If the water has excessive amounts of dissolved solids in it, it would result into distorted electrical control signals to the furnace's solid state devices. In addition, the ground circuit detector circuits will be
 desensitized.


What's the solution?

Use industrial water solutions like Softners, DM Plants etc.

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