SU445816A1 - The method of drying the lining of induction furnaces - Google Patents

Description

one

The invention relates to oyzhas 4 th meta lgurgy, to induction signals.

The most important part of an induction furnace is induction heaters, which are usually made of puted copper tubes and are not cast into special concretes.

At present, instead of forming ceramic liners, the monolithic of heat-resistant concretes, which are then subjected to special drying, are widely used to form injectors, the quality of which depends on the durability of induction furnaces.

Prior to the start of sushi, heat-resistant concrete gains the necessary strength in a moist environment. The duration of its exposure in wet conditions is no less than 3-7 days.

. The most common method of drying the lining of induction packs is drying in special aggregate units of aerial heating equipment of various kinds of heating elements (electric lamps, gas burners, etc.) by step peiKum (heating, some cooling, further heating, etc.). d.)

However, with this method of drying, even after the third stage of heating in the inner layers of concrete and on the electrical insulation of the inductor

0 a large amount of moisture remains. The reason for this is the desire of moisture to move inward in the direction of heat flow, as well as the low temperature of the internal concrete layers, which is two or more times lower than the external one.

The presence of moisture on the electrical insulation of the inductor, as a rule, leads to a short circuit and the induction furnaces fail.

The aim of the invention is to improve the quality of the concrete shell lining and increase durability

Induction furnaces,

 According to the proposed method of drying, the liner is carried out by constant heating by passing through a tubular conductor of the inductor a heat transfer fluid with a temperature of I20-I500C for 3240 hours.

The proposed method allows the drying of the concrete lining in the direction from the inner layers of the concrete to the outer, which ensures good drying of not only the concrete lining, but also the electrical insulation of the inductor,

i The method is carried out in the following way, -

Poave, making the inductor coil of its lining with an aero-resistant concrete concrete and hardening it (b.on.) in a moist environment during 3–7 days to the ends of the tubular conductor of the inductor coil

Is the coolant, for example

nap-j heated to a temperature of 12015 and С, and passed it along the current of 32-40 hours. Moreover, the temperature of the object, which should be minimal in the initial period of time, is controlled by the amount of steam supplied through the tubular conductor in the prescribed mode,

PESHMEGRA INVENTORIES

The method of drying the lining of induction furnaces, which consists in moistening the concrete lining after its manufacture for 3-7 days and drying the crucible by passing heat carrier through it, which is done in order to improve the quality of drying and increase the durability of the lining They are passed through the tubular conductors of the inductor heat transfer with a temperature range of 120-150 ° C for 3240 hours.