A STUDY OF IMPACT CRUSHING UNDER REDUCED PRESSURE

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

SABURO YASHIMA¹  TATSUO SHINOZAKI¹  HITOSHI HASHIMOTO¹ 

[1] Research Institute of Mineral Dressing and Metallurgy, Tohoku University

关键词: Size Reduction;    Impact Crushing;    Single Particle Crushing;    Grinding Mechanism;    Hammer Mill;    Reduced Pressure;   

DOI  :  10.1252/jcej.20.380

来源: Maruzen Company Ltd

【 摘 要 】

References(11)Cited-By(2)Grinding tests on brittle materials were carried out both under reduced pressure and under atmospheric pressure, using a laboratory hammer mill and a vacuum vessel. Finer products were obtained under reduced pressure than under atmospheric pressure. To explain the experimental results from the standpoint of single fracture, a model calculation was carried out by using a simplified model of the hammer mill. In the model calculation, the friction drag of air, the effect of atmospheric pressure on the strength of brittle particles, the dependence of Young''s modulus, Poisson''s ratio and the strength on the loading rate, and the dependence of the strength on the particle''s volume were taken into account. It was found that a part of the experimental results was explained by the model calculation.

【 授权许可】

Unknown