Method for preparing ferrovanadium alloys based on aluminothermic self-propagating gradient reduction and slag washing refining

US11180827B2 · kind B2 · utility

Assignee

• Northwestern University · US

Inventors

• Zhihe Dou · Shenyang, CN
• Tingan ZHANG · Shenyang, CN
• Yan Liu · Beijing, CN
• Guozhi Lv · Shenyang, CN
• Qiuyue Zhao · Shenyang, CN
• Liping Niu · Shenyang, CN
• Daxue Fu · Shenyang, CN
• Weiguang Zhang · Tangxia, CN

Key dates

• Filing date: May 21, 2018
• Grant date: Nov 23, 2021
• Expiry date: Sep 4, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C38/12
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The present invention provides a method for preparing ferrovanadium alloys based on aluminothermic self-propagating gradient reduction and slag washing refining. The method includes the steps of (1) performing aluminothermic self-propagating gradient reduction; (2) performing heat preserving and smelting to obtain an upper layer alumina-based slag and a lower layer alloy melt; (3) jetting refining slags into the lower layer alloy melt, and performing stirring and slag washing refining; and (4) cooling the refined high-temperature melt to room temperature, and removing an upper layer smelting slag to obtain the ferrovanadium alloys.