Lightweight thermal insulation daub for coreless induction furnace, and preparation method thereof

Abstract

The invention discloses a lightweight thermal insulation daub for a coreless induction furnace, and a preparation method thereof. The lightweight thermal insulation daub comprises a lightweight thermal insulation daub, the outer layer of a coreless induction furnace coil is uniformly covered with the lightweight thermal insulation daub, and the main chemical components of the lightweight thermal insulation daub comprise 65-75% of Al2O3, 17-25% of SiO2 and 4-6% of CaO. The preparation method of the lightweight thermal insulation daub comprises the following five steps: 1, preparation of raw materials; 2, mixing of the raw materials; 3, material detection; 4, material packaging; and 5, application. The lightweight thermal insulation daub is prepared from 45-55 wt% of alumina clinker, 5-10 wt% of lightweight hollow high-alumina balls, 3-6 wt% of perlite, 20-25 wt% of aluminate cement and 1-3 wt% of silica powder. The lightweight thermal insulation daub for the coreless induction furnace has a low thermal conductivity and an excellent thermal insulation effect, can be applied to the coil and a working lining material to greatly reduce the penetration of induction heat in a furnace body, so the temperature difference between the cold face and the hot face of the working lining material is greatly reduced, the service life of the working lining material is prolonged, and dissipationof the induction heat in the furnace body is reduced.

Description

technical field [0001] The invention relates to the technical field of casting and smelting, in particular to a lightweight thermal insulation mortar for a coreless induction furnace and a preparation method thereof. Background technique [0002] Coil mastic is a coating material used on the inner surface of coreless inductor coils. At present, the cement used for coreless induction furnace coils on the market is mainly made of silicon-aluminum. Due to the high density and high thermal conductivity of this type of cement, the induction heat in the furnace penetrates the working lining material, causing the hot surface of the working lining material to be different from that of the working lining material. The large temperature difference on the cold surface will accelerate the damage of the working lining material. The induction heat in the furnace will continue to pass through the coil and the furnace shell and dissipate to the surrounding environment, which wastes a lot of...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing cement for the coreless induction furnace coil is mainly made of silicon-aluminum. Due to the high density and high thermal conductivity of this type of cement, the induction heat in the furnace penetrates the working lining material, resulting in The temperature difference between the hot surface and the cold surface of the lining material is large, which accelerates the damage of the working lining material, and the induction heat in the furnace will continue to pass through the coil and the furnace shell and dissipate to the surrounding environment, wasting a lot of energy consumption and increasing the electricity cost of the electric furnace manufacturer. In view of the disadvantages, a kind of lightweight heat-insulating mortar for coreless induction furnace and its preparation method are proposed

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