Method and apparatus for measuring protection slag thickness in continuous casting crystallizer in

Abstract

The invention relates to measuring method and device of protecting cinder in continuous metal cast crystallizer. A measuring method is following: step 1, several groups of wire is set on a rack; every suit of wire is three sticks, the melting points of three wires are 600-700 deg.C, 1000-1100deg.C, 1500-1530deg.C; Step 2, several suits of wires whose length is bigger than thickness of protecting cinder and length is similar are inserted into the protecting cinder, level part of the wire is the same as protecting cinder, keep for several seconds and pick out; step 3, measuring the length of wires, the difference of length is the thickness of protecting cinder. The data measured in the invention is precise, reliable, intuitionistic, the invention not only can be used in common crystallizer, but also in crystallizer with electromagnetism mixing.

Description

(1) Technical field [0001] The invention relates to a method and a device for measuring the thickness of mold slag in a continuous casting crystallizer. (2) Background technology [0002] Continuous casting is the last process in the steelmaking production process. The molten steel is roughly smelted and refined in the converter or electric furnace, and then cast into the continuous casting tundish through the ladle. The molten steel in the tundish is then poured into the mold, and the molten steel in the mold At the beginning of solidification, mold slag must be added to the mold. The mold slag put into the mold is continuously melted under the action of high-temperature molten steel to form a three-layer structure, namely, molten slag layer, sintered layer, and raw slag layer. Mold slag plays five roles in the continuous casting process, 1. It keeps the surface of molten steel warm and prevents the surface of molten steel in the crystallizer from freezing steel. 2. The mo...

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Problems solved by technology

[0003] Since the continuous casting mold powder is a very important auxiliary material in the continuous casting process and plays a very important metallurgical role in the continuous casting process, it is necessary to monitor the mold powder frequently in the continuous casting production process The current traditional method of measuring the thickness of the mold powder layer is shown in Figure 1, that is, insert the steel wire 16 through the steel pipe 15 into the crystallizer 10, take it out after a period of time, because the inserted steel wire hits the molten steel It will melt, but will not melt in the mold slag layer. The thickness of the slag layer can be judged according to the slag attached to the steel wire. Since the boundary line between the slag layer and the sintered layer on the steel wire is not clear, when using this method to measure, The readings of different people are quite different, so it is difficult to accurately grasp the thickness of mold powder, and this method cannot measure the thickness of sintered layer and powder slag layer

Since the electromagnetic field will have a strong suction force on the steel pipe, this method cannot be used for the measurement of mold slag in the mold with electromagnetic stirring

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