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What is the quality of coreless induction furnace coil mortar?

What is the quality of coreless induction furnace coil mortar?

A good coil cement has:

1) Good insulation performance-due to the coreless induction furnace coil design, there is a certain gap between the turns of the coil, and now the good filling between the turns is this kind of material. We have used the shaker to be 1 talent under the state of 10000 volts withstand voltage. The thickness of the coil cement sample block has a very high insulation resistance.

2) High refractoriness—Generally, the refractoriness of this high alumina-based coil cement can reach 1760C. Therefore, in the range of our molten cast iron 1530-1580C and molten cast steel 1650-1720C, the coil cement is sufficient to resist The molten metal penetrates into the coil paste, and the induction coil is protected.

Here are some technical indicators of a classic CA340 coil glue made by Saint-Gobain, which can be provided for reference:

chemical composition%

Al2O3 91.7

SiO2 1.0

Other 7.3

Physical properties

Grain size 20F

Dry density 2.88 g/cm3

High operating temperature 1760C

Coil paste application (use): some coil paste is applied to the induction coil, or it can be poured into a certain thickness of insulation and heat insulation protection layer according to the design requirements of the internal test of the coil through the method of casting in the manufacturing mold. This method is generally adopted in the homes of electric furnace manufacturers. Recently, we have poured a 50-ton coreless induction furnace. In addition, I have a customer who used coil cement to repair the nozzle of an induction electric furnace. I heard that the repaired nozzle is still more durable. Of course, coil mortar is actually a type of castable for our professional refractory materials, but its aggregate is fine. It can be used to repair the erosion and cracks of some ladle and other lining materials. .