Ultrasonic technology began to be applied in the medical field in the 1950s and 1960s, but then it also made great progress. At present, in addition to the application in the medical field, ultrasonic technology has been mature in the semiconductor industry, optical industry, petrochemical industry and other aspects, but it mainly uses its characteristics of good directionality and strong penetration ability to carry out cleaning work.

Ultrasonic technology has become an increasingly important means of strengthening. In addition to the above-mentioned applications, it also has excellent application potential in other fields to be developed.

Principle of ultrasonic strengthening metallurgical process:

As we all know, “three transfers and one reaction” in metallurgical process is the essential factor affecting process efficiency, speed and capacity, and also summarizes the whole process of metallurgical and chemical production. The so-called “three transfers” refer to mass transfer, momentum transfer and heat transfer, and “one reaction” refers to the process of chemical reaction. In essence, how to improve the metallurgical process should start with how to improve the efficiency and speed of “three transmission and one reaction”.

From this point of view, ultrasonic technology plays a good role in promoting the transfer of mass, momentum and heat, which is mainly determined by the inherent characteristics of ultrasonic. In summary, the application of ultrasonic technology in metallurgical process will have the following three main effects:

1、 Cavitation effect

Cavitation effect refers to the dynamic process of growth and collapse of micro gas core cavitation bubbles existing in the liquid phase (melt, solution, etc.) when the sound pressure reaches a certain value. During the process of growth, rupture and extinction of micro bubbles generated in the liquid phase, hot spots appear in the small space around the bubble machine, resulting in high temperature and high pressure zone to promote the reaction.

2、 Mechanical effect

Mechanical effect is the effect produced by ultrasonic moving forward in the medium. The high-frequency vibration and radiation pressure of ultrasonic can form effective agitation and flow, so that the medium guidance can enter the vibration state in its propagation space, so as to speed up the diffusion and dissolution process of substances. Mechanical effect combined with the vibration of cavitation bubbles, the strong jet and local micro impingement generated on the solid surface can significantly reduce the surface tension and friction of the liquid, and destroy the boundary layer of the solid-liquid interface, so as to achieve the effect that ordinary low-frequency mechanical stirring can not achieve.

3、 Thermal effect

Thermal effect refers to the heat released or absorbed by the system in the process of change at a certain temperature. When ultrasonic wave propagates in the medium, its energy will be continuously absorbed by the medium particles, so as to convert it into heat energy and promote the heat transfer in the reaction process.

Through the unique effect of ultrasonic technology, it can effectively improve the efficiency and speed of “three transmission and one reaction” in the metallurgical process, improve the mineral activity, reduce the amount of raw materials and shorten the reaction time, so as to achieve the purpose of energy saving and consumption reduction.