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Common problems and countermeasures in the induction furnace
- Dec 06, 2016 -

Work a lot of the problems in an induction furnace, only made a presentation on a number of frequently asked questions below.

Big loss ⑴ elements

Induction furnace in the Si, Mn and the burning of oxidizable elements such as Cr, 3%-5%. Burn premium, cast iron chemical composition fluctuation, is bound to give rise to a series of organizational and performance issues. Element burning, melting down for too long, and not slagging protection time. If the scrap quantity is large, light material, charge water rust, problem is aggravated. Avoid element burning solution is: ① burden as clean as possible, shaped not to fork, the size should not be too large, too thin. II put an end to, and create fast-melting conditions. ③ early smelting slag in a timely manner, later covered with slag at high temperatures. The protective effect of molten slag into full play. ④ If the plant has a chip to use, hearth shop, melting down added to a batch of molten pool.

⑵ in liquid iron o higher

Induction furnace cupola oxidation atmosphere, and due to the liquid iron [o] and [FeO] and [c] respond c protection of the Fe, dissolved oxygen in molten iron is not much (see 2 (5)). Melting late in order to increase c solvent, often lower radio frequencies to enhance the stirring of molten pool. If the "hump" is too high, it FM takes too long, liquid iron and increased risk exposure to the atmosphere and o ions dissociated into molten iron. Melting late additions without baking, will make [o] and [h] increase. Recently, from members of the industry: "in more than 1500 c insulation, [o] does not decrease but increase. "Point of view, for reference. Ways to prevent high o is: ① melting late FM don't overdo it. Do not use wet materials and tools in the late II. ③ overheating temperature is not too high. Avoid high temperatures, warm for a long time.

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