Mr. Jinlin Yang Profile

Jinlin Yang

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Proceedings Article | 29 April 2022 Paper

Study on abrasive grinding characteristics of calcite

Jinlin Yang, Pengyan Zhu, Wenzhe Xu, Shaojian Ma

Proceedings Volume 12255, 122551O (2022) https://doi.org/10.1117/12.2638722

KEYWORDS: Particles, Calcite, Statistical analysis, Abrasives, MATLAB, Minerals, Data processing, Statistical methods, Analytical research, Statistical inference

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Impact and abrasion are the two main grinding mechanisms of ball mill and most of the studies on the co-existence of impact and abrasion were carried out by predecessors, but the single lapping action state has rarely been studied. Therefore, the pure natural calcite is taken as the research object in this paper, and the batch grinding, laser particle size analysis, statistics and Matlab programming techniques were applied to study the particle size distribution and law of calcite grinding products, the characteristics and law of single-grain grinding speed and the minimum particle size of grinding products under different feeding size fractions. The results show that the grinding force of material is more sufficient with the prolongation of grinding time and the trend of change is more significant with the fineness of feed size. The grinding speed decreases with the increase of grinding time, and the finer the feed size fraction is, the smaller the grinding speed is, but the grinding characteristics change with a certain feed particle size, which also indicates that the grinding mechanism under the grinding state is more complex with the decrease of the feed size fraction. The minimum particle size of grinding products under grinding condition is maintained in the range of 3.386~5.146μm by statistical method. The results can not only provide a theoretical basis for the subsequent research on the characteristics and rules of grinding in the cascading motion state, but also provide a new idea for the subsequent data processing in the grinding process.

Proceedings Article | 16 February 2022 Paper

Effect of ferric chloride on graphitization of anthracite and petroleum coke

Jinlin Yang, Wenzhe Xu, Shuo Xu, Shaojian Ma

Proceedings Volume 12164, 121641S (2022) https://doi.org/10.1117/12.2628427

KEYWORDS: Carbon, Diffraction, Resistance, Iron, X-rays, Statistical analysis, X-ray diffraction, Silicon, Metals, Ions

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In this paper, using ferric chloride as catalyst, the graphitization of anthracite and petroleum coke was studied. The results show that the optimum dosage of ferric chloride is 10% for the graphitization of anthracite and 7.5% for the graphitization of petroleum coke. The effect of roasting temperature on the graphitization of anthracite and petroleum coke catalyzed by ferric chloride is remarkable, and the best temperature is 1400°C in experimental temperatures. The effect of roasting holding time on the graphitization of anthracite and petroleum coke catalyzed by ferric chloride is positive, and the effect is not obvious after 120min. Under the optimal experimental conditions, the highest graphitization degree of anthracite and petroleum coke catalyzed by ferric chloride are 37.21% and 31.97%, respectively. It intimates that the catalytic effect of ferric chloride on anthracite is better than that on petroleum coke.

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