The level of extensive use of alumina industry are static type, hammer type, ultrasonic, nuclear radiation, the above liquid level measuring instrument according to the medium and field conditions are different, each have advantages, but also have their own shortcomings. In contrast, the radar level meter by the medium characteristics of small, high precision, high temperature and high pressure resistance ability, using non-contact measurement methods, and convenient installation, convenient maintenance and other advantages of online, has been widely used in alumina industry. In my company as an example, in the slurry preparation, evaporation, refining, washing, sand experiment line and deployment, eight hundred thousand tons of alkali flat, desilication process such as the extensive use of radar level meter level monitoring.

Radar level meter on the actual application of the radar level meter, the effect is not entirely satisfactory. In some cases, due to the installation or process conditions, the instrument is unstable and inaccurate, which has a great impact on the process control. Therefore, the research of inaccurate measurement of radar level meter, eliminate the interference factors from the aspects of origin and use, improve the measurement conditions, ensure the instruments for the stable and reliable operation, production control based on trusted is very important.