The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 09, 2018
Filed:
Mar. 20, 2013
Baoshan Iron & Steel Co., Ltd., Shanghai, CN;
Chen Zhang, Shanghai, CN;
Dexiang Cai, Shanghai, CN;
Jianguo Shen, Shanghai, CN;
Feng Mei, Shanghai, CN;
Baoshan Iron & Steel Co. LTD, Shanghai, CN;
Abstract
The invention provides a fluoride-free continuous casting mold flux for low-carbon steel, comprising, based on weight, NaO 5-10%, MgO 3-10%, MnO 3-10%, BO3-10%, AlO≤6%, LiO<3%, C 1-3%, and the balance of CaO and SiOas well as inevitable impurities, wherein the ratio of CaO/SiOis 0.8˜1.3. The mold flux has a melting point of 95˜1150° C., a viscosity at 1300° C. of 0.1-0.3 Pa·s, and a crystallization rate of 10-50% as determined according to the method described in the specification for examining crystallization property. The boron-containing, fluoride-free flux developed according to the invention has a moderate crystallization rate, can be used in a crystallizer to control transfer of heat from molten steel effectively, and has been applied successfully in a low-carbon steel slab conticaster with a metallurgical effect that arrives at the level of a traditional fluoride-containing flux to full extent.