US 11,892,384 B2
Evaluation method of mixing uniformity of composite powder
Jinfeng Bi, Beijing (CN); Qinqin Chen, Beijing (CN); Xinye Wu, Beijing (CN); Xing Zhang, Xinle (CN); Jian Lyu, Beijing (CN); and Ying Lyu, Shenyang (CN)
Assigned to INSTITUTE OF FOOD SCIENCE AND TECHNOLOGY, CHINESE ACADEMY OF AGRICULTURAL SCIENCES, Beijing (CN)
Appl. No. 17/758,397
Filed by INSTITUTE OF FOOD SCIENCE AND TECHNOLOGY, CHINESE ACADEMY OF AGRICULTURAL SCIENCES, Beijing (CN)
PCT Filed Nov. 18, 2020, PCT No. PCT/CN2020/129692
§ 371(c)(1), (2) Date Jul. 5, 2022,
PCT Pub. No. WO2022/099732, PCT Pub. Date May 19, 2022.
Claims priority of application No. 202011248647.8 (CN), filed on Nov. 10, 2020.
Prior Publication US 2023/0266212 A1, Aug. 24, 2023
Int. Cl. G01N 1/38 (2006.01)
CPC G01N 1/38 (2013.01) 4 Claims
OG exemplary drawing
 
1. An evaluation method of mixing uniformity of composite powder, including the following steps:
S1, determining raw materials of composite powder to be evaluated and a mass ratio of each raw material according to the composite powder to be evaluated;
S2, mixing the raw materials according to the mass ratio to obtain multiple standard composite powders with different mixing times, wherein a mixing time difference between any two adjacent standard composite powders according to the mixing time from small to large is not be less than 30 s and not more than 3 min;
S3, determining the flow energy of each standard composite powder;
S4, analyzing and comparing the flow energy of the multiple standard composite powders by a significant difference method, determining at least 3 consecutive standard composite powders with no significant difference in the flow energy according to the mixing time from small to large, defining each of the at least 3 consecutive standard composite powders as uniform-mixed standard composite powder, calculating an average value of the flow energy of the uniform-mixed standard composite powders, and record the average value as standard flow energy: TFEs;
S5, determining the flow energy of the composite powder to be evaluated: TFEd, calculating a percentage difference P·Vds between TFEd and TFEs according to P·Vds=|(TFEd−TFEs)|/TFEs*100, and evaluating the mixing uniformity of the composite powder according to P·Vds;
wherein a specific preparation method of each standard composite powder in S2 includes: placing the raw materials according to the mass ratio in a Turbula three-dimensional mixer, and mixing it for preset time, wherein a mixing speed is 22-96 rpm;
wherein evaluating the mixing uniformity of the composite powder according to the P·Vds includes: if P·Vds does not exceed 5%, the composite powder to be evaluated is determined to be uniformly mixed.