基于温压瞬变的纤维状黏土矿物粉体的制备  

Preparation method of fibrous clay mineral powder based on temperature and pressure transient

作　　者：周友行[1,2] 宋佳林[1] 徐长锋 沈旺 赵玉 ZHOU Youhang;SONG Jialin;XU Changfeng;SHEN Wang;ZHAO Yu(College of Mechanical Engineering,Xiangtan University,Xiangtan 411105,China;Engineering Research Center of Complex Tracks Processing,Technology and Equipment of Ministry of Education,Xiangtan University,Xiangtan 411105,China)

机构地区：[1]湘潭大学机械工程学院,湖南湘潭411105 [2]湘潭大学复杂轨迹加工工艺及装备教育部工程研究中心,湖南湘潭411105

出　　处：《中国粉体技术》2021年第3期97-104,共8页China Powder Science and Technology

基　　金：国家自然科学基金项目,编号:51775468;湖南省教育厅科学研究项目,编号:20A505。

摘　　要：机械破碎方法因摩擦、挤压作用而极易损坏纤维状黏土矿物的纤维结构,为解决该问题,本文中提出一种全新的纤维状黏土矿物破碎方法——温压瞬变破碎法。高温高压下的格里菲斯强度理论以及蒸汽爆裂技术为该方法的理论基础,通过选取海泡石为原材料设计试验验证了该方法的可行性。结果表明:这种破碎方法能够保存海泡石的纤维结构;随着压力容器设定压力值的增大,海泡石矿石的破碎效果更加显著,破碎后的小粒径海泡石颗粒占比也明显提高。The mechanical crushing method is easy to damage the fiber structure of fibrous clay minerals due to friction and extrusion.To solve this problem,this paper proposes a new method for crushing fibrous clay minerals,namely,crushing using transient temperature and pressure change.The use of the Griffith’s strength theory under high-temperature,high-pressure,and dry saturated steam explosion improvesthe theoretical basis of the method,the feasibility of this method is verified by the design test of sepiolite as raw material.The results from the experiment show that this method can preserve its fiber structure.As the set pressure of the pressure vessel increases,the sepiolite ore is increasingly crushed into a fine power,and the precision of the crushed mineral powder also increases.

关 键 词：矿物粉体 纤维结构 温压瞬变 格里菲思强度理论 张力破碎 

分 类 号：TD-05[矿业工程]