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. 17, 2023
Filed:
May. 11, 2023
Chongqing Shangjia Electronic Co., Ltd., Chongqing, CN;
Chongqing University, Chongqing, CN;
Shuchun Li, Chongqing, CN;
Liang Fu, Chongqing, CN;
Fusheng Pan, Chongqing, CN;
Xinren Liao, Chongqing, CN;
Hualin Xie, Chongqing, CN;
Juncai Ma, Chongqing, CN;
Ping Li, Chongqing, CN;
Zhan Xu, Chongqing, CN;
Weipeng Zhang, Chongqing, CN;
CHONGQING SHANGJIA ELECTRONIC CO., LTD., Chongqing, CN;
CHONGQING UNIVERSITY, Chongqing, CN;
Abstract
A method for synchronous production of manganese tetraoxide and ferric oxide for a soft magnetic material by using marine polymetallic nodules includes: 1) crushing and grinding marine manganese nodules and baking to a constant weight; thoroughly mixing with a mixed flux and roasting in a muffle furnace; 2) carrying out solid-liquid separation, washing solid-phase precipitates with water, grinding the solid, adding sulfuric acid, controlling the temperature to be below 50° C., and vacuuming a reactor up; 3) adding a reducing agent to react at room temperature for 5-10 min, adding ammonia water to adjust the pH value to 5.5, and carrying out separation and filtering; 4) controlling the temperatures of manganese sulfate and ferric sulfate solutions to be below 50° C., and adding ammonium sulfide; and 5) washing with deionized water, and calcining at 800-900° C. for 1-3 s by a suspension low-temperature instantaneous firing system.