Accurate control method for content of acid-soluble aluminum in common oriented silicon steel CGO smelting process

• Main Authors: GUAN LIUHUI, SUN TUO, ZHANG ZHENSHEN, ZHANG YONG, WANG HAIYAN, CHENG GUANJIANG, WANG ZHONGQI, TIAN YUNSHENG, XIA ZHISHENG, WANG XINZHI, ZHANG LINGZHI, XU DANGWEI, WANG JUN, LI ZHIGUANG, KONG DENAN
• Format: Patent
• Language: Chinese; English
• Published: 03.01.2023
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; METALLURGY OF IRON; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a method for accurately controlling the content of acid-soluble aluminum in the CGO smelting process of common oriented silicon steel. The method comprises the following specific steps of converter tapping, top slag modification, RH vacuum treatment, sampling and Als content analysis, secondary aluminum control, sampling and Als content analysis, tertiary aluminum control and sampling and Als content analysis. According to the method for accurately controlling the content of the acid-soluble aluminum in the CGO smelting process of the common oriented silicon steel, compared with a converter tapping method adopting pure aluminum for precipitation deoxidation and adopting high-purity silicon iron with the Al content smaller than or equal to 0.10% for deoxidation alloying, the situation that Als exceed the upper limit of components due to deoxidation alloying when RH enters a station can be prevented, and the yield of the acid-soluble aluminum is increased; by adopting the top slag modifi