source：http://en.zzdsyc.com/news370438.html │ Publication time：2019-5-5 9:20:00
refining slag's foaming performance is related to the viscosity, surface tension and density of slag. Generally, it is measured by foaming index. However, the determination of foaming index of slag is based on a certain degree. Based on the experimental data of the composition range of slag, a certain temperature and a certain blowing rate, these factors in the actual production are constantly changing with the different refining requirements and production processes, and the specific processes of each production unit are different. Therefore, the conclusions obtained have certain limitations on the guidance significance of actual production. The influence of fluorite on foaming effect is very obvious. The first is to reduce the surface tension and slag density significantly, which is beneficial to slag foaming. The two is to reduce the viscosity of the slag, which is not conducive to the foaming of the slag. Therefore, according to the slag system used in the actual production, reasonable control of the time and dosage of the slag is made. The refining slag is not foam, but it depends on the nature of the slag. It depends on the volume of the gas, even if the slag is of good quality, due to the volume of gas. In the middle and later stage of refining, because the oxygen in the slag has been nearly removed, the effect of adding calcium carbide or silicon carbide to produce foamed slag is poor. In order to improve the foaming performance of the slag in the middle and later stages of refining, we can use the foaming agent added with limestone and a small amount of carbon powder to refine the refining slag, and utilize the CO bubbles formed by CO2 and C to promote the foaming of slag.
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