US 12,344,922 B2
Arsenic iron alloy, preparation method and resource treatment method thereof
Xiaobo Min, Changsha (CN); Fei Chai, Changsha (CN); Feiping Zhao, Changsha (CN); Liyuan Chai, Changsha (CN); Yanjie Liang, Changsha (CN); Cong Peng, Changsha (CN); and Yiwei Zhou, Changsha (CN)
Assigned to CENTRAL SOUTH UNIVERSITY, Changsha (CN)
Filed by CENTRAL SOUTH UNIVERSITY, Changsha (CN)
Filed on Aug. 29, 2024, as Appl. No. 18/819,299.
Application 18/819,299 is a continuation of application No. PCT/CN2023/117915, filed on Sep. 11, 2023.
Claims priority of application No. 202211154283.6 (CN), filed on Sep. 21, 2022.
Prior Publication US 2024/0417829 A1, Dec. 19, 2024
Int. Cl. C22C 33/02 (2006.01); C22C 38/00 (2006.01)
CPC C22C 33/02 (2013.01) [C22C 38/002 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A preparation method for an arsenic iron alloy, comprising:
ball milling arsenic powder and iron powder under protection of inert atmosphere according to a molar ratio of 0.1-0.35:1 or 0.35-2:1 to obtain pretreated material;
the ball milling process comprising a plurality of ball milling cycles, a ball milling duration of each ball milling cycle being 30 min to 60 min, and an interval duration between two adjacent ball milling cycles being 5 min to 15 min;
in the ball milling process, a rotating speed of the ball milling being 250 r/min to 400 r/min, a weight ratio of ball to material being 10-20:1, and a total time of the ball milling being 8 h to 48 h;
a grain size of the ball used in the ball milling process is selected from one or more of 3 mm, 6 mm, 10 mm, and 15 mm; and
vacuum hot press sintering the pretreated material to obtain arsenic iron alloy;
wherein, the vacuum hot press sintering process comprises:
placing the pretreated material in a vacuum environment; and
sintering the pretreated material; in the sintering process, a pressure of 30-50 MPa being applied to the pretreated material;
wherein the sintering process comprises:
heating the pretreated material from room temperature to 400-500° C., and holding for 0.5-1 h; and
heating the pretreated material from 400-500° C. to 600-800° C., and holding for 0.5-1 h.