Measuring method

Abstract

The invention provides a measuring method. The measuring method includes the steps that molten salt is added into a molten salt electrolytic bath; a measuring rod sticks into the molten salt electrolytic bath; the distance between the position, at the opening of the molten salt electrolytic bath, of the measuring rod and the end, sticking into the electrolytic bath, of the measuring rod is defined as A0; the height of molten salt adhering to the measuring rod is the molten salt liquid level height; electrolysis solid is added; the measuring rod sticks into the molten salt electrolytic bath; the distance between the position, at the opening of the molten salt electrolytic bath, of the measuring rod and the end, sticking into the electrolytic bath, of the measuring rod is defined as A1; and the height of the electrolysis solid in the molten salt electrolytic bath is obtained on the basis of the difference between A0 and A1. The measuring method has the beneficial effects that as long as the measuring rod sticks into the electrolytic bath, the molten salt liquid level height and the height of the electrolysis solid can be obtained; compared with the prior art, the measuring method is simpler and more convenient, and measuring results are more accurate due to the fact that the measuring method is not influenced by the complex structure of a molten salt electrolysis device in the prior art; and the corrosion degree of the measuring rod can be reduced.

Description

technical field [0001] The invention relates to the field of semiconductor manufacturing, in particular to a measuring method. Background technique [0002] Molten salt electrolysis is a process of electrochemically purifying or separating crude metals or alloys using molten salt as the medium and using the potential difference during the metal reduction process. [0003] In the molten salt electrolysis process, the electrode rod is a necessary part. Among them, one end of the electrode rod is used to connect with an external power supply; the other end of the electrode rod needs to be placed in the molten electrolytic medium in the electrolysis tank before the electrolysis starts. During the electrolysis process, the end of the electrode rod protruding into the electrolytic cell gradually accumulates solid electrolysis products. Taking the preparation of high-purity titanium metal as an example, titanium ions get electrons near the electrode rod located in the molten elec...

AI Technical Summary

Problems solved by technology

However, in practical applications, the structure of the molten salt electrolysis equipment used in the molten salt electrolysis process is relatively complicated. The molten salt electrolysis cell equipped with molten salt liquid surface and electrolytic solids is also equipped with devices such as thermal equipment and insulation layer. The complex structure will cause the propagation of ultrasonic waves to be disturbed, which will affect the measurement accuracy, which will affect the subsequent selection of the electrode rod size. If the size of the electrode rod does not meet the requirements, it will affect the electrolysis process, and then affect the formation quality of the electrolysis product.

[0005] In addition, the equipment used for ultrasonic positioning is relatively complicated. In the actual complex working environment, not only does the operation remain unchanged, but it is also easily damaged, which may also affect the quality of the electrolytic product.

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