RU26297U1 - LIQUID METAL TEMPERATURE DEVICE - Google Patents

Abstract

A device for measuring the temperature of liquid metal, including a paper case, inside which there is a ceramic insert, in which a U-shaped tube with a hot junction of thermoelectrodes is mounted, the protruding part of which is closed by a protective cap, characterized in that the lower part of the case is installed in a paper sleeve, in the lower parts of which an additional ceramic insert is installed with a U-shaped tube fixed in it with a hot junction of thermoelectrodes, the protruding part of which is also closed by a protective cap.

Description

V22D2 / 00

Device for measuring liquid temperature

The utility model relates to the field of metallurgy and can be used to measure the temperature in converters and other collecting units with liquid metal melt.

Known thermal probe for metal smelting furnaces containing a cylindrical refractory block made of a heat-insulating layer and a heat-resistant coating of dense refractory with an external protective cover, a thermocouple, a block holder made in the form of a tube in which the thermocouple electrodes are located. (Patent N ° 2000871)

The disadvantage of this device is its inertia, insufficient accuracy, low resistance to high temperatures and the aggressive environment of liquid metal and slag in the converter.

The closest analogue is the measuring head, which includes a paper case with a ceramic insert inside, in which there is also a shaped tube, at the top of which there is a hot junction of thermoelectrodes. The part and tubes protruding from the ceramic insert are covered with a protective cap. (A.M. Yakushev. The converter’s guide, Chelyabinsk “Metallurgy, 1990, p. 395).

The disadvantage of this device is its fragility, i.e. one-time use, and, if it is necessary to repeat the measurement, then the converter needs to be pushed, repeated measurement, which entails an increase in the purge time and a decrease in productivity.

The technical problem solved by the utility model is to increase the durability of the device, reducing the melting time, and

metal

consequently, increasing the productivity of the converter, as well as reducing the number of blow-offs, increasing the durability of the converter lining.

The solution to this problem is achieved by the fact that the device for measuring the temperature of liquid metal includes a paper case, in which, in the lower part, there is a ceramic insert in which a hot junction of thermoelectrodes is fixed, the lower part of which. it is closed with a zitsitic cap, and the lower part of the case is installed in a paper sleeve, in the lower part of which there is an additional ceramic insert with a U-shaped tube fixed to it with a hot junction of the electrodes, the protruding part, which is also covered with a protective cap.

Soup1; the nosy model is illustrated in the drawing, which shows a general view of the device in a section.

The device comprises a paper case 1, in the lower part of which a ceramic insert 2 is mounted, in which a U-shaped tube 3 with a hot junction 4 of thermoelectrodes 5 and a sampler 6 are mounted. The lower part of the U-shaped tube is closed with a protective cap 7. The lower part of the case 1 is installed in a paper sleeve 8, which is equipped with a ceramic insert 9, in which a U-shaped tube 10 is installed, with thermocouple 12 hot junction 11. The lower part of the tube 10 is also closed by a protective cap 13. Reference 14 denotes the holder of the electrical contacts.

The device operates as follows:

2-3 minutes before the end of melting, temperature is measured. The lance (not shown in the drawing) with the device attached to it is lowered into the melt, about 1 meter from the level of the bath. At this time, the protective cap 13 melts, and the melt comes into direct contact with the quartz U-shaped tube 10, in which the thermoelectrodes 12 are located. Temperature is measured for 3–4 seconds. Then the lance with the device attached to it travels to the upper extreme position. Depending on the values of the measured temperature, they are purged to the desired temperature and re-measured, at which the lance is again lowered with the device attached to it. When re-diving, the paper sleeve 8, protective

5-.

cap 7, and the temperature is measured. At the same time, a sample is taken into the sampler during this period. Then the lance with the device is brought to its highest position.

At the Magnitogorsk Iron and Steel Works in the oxygen-converter shop, the proposed device was used to measure the temperature of liquid metal in the converter. As a result, the smelting time was reduced by 3-5 minutes, the output of non-ordering products decreased, and the durability of the converter lining also increased (since an additional punch is excluded).

Claims (1)

A device for measuring the temperature of molten metal, including a paper case, inside which there is a ceramic insert, in which a U-shaped tube with a hot junction of thermoelectrodes is mounted, the protruding part of which is closed by a protective cap, characterized in that the lower part of the case is installed in a paper sleeve, in the lower parts of which there is an additional ceramic insert with a U-shaped tube fixed to it with a hot junction of thermoelectrodes, the protruding part of which is also closed by a protective cap.