基于离心方式的超细粉体压缩技术

Superfine powder compression technology based on centrifuge

在自主研发设计的非标离心机上,利用离心分离生物液体的原理对超细粉体进行离心压缩,获取最终产品;对粉体离心压缩动力学行为进行理论分析,探讨粉体在冲击压缩条件下的压缩规律,研究压缩过程中压力与粉体孔隙率的非线性关系;通过对白炭黑和硅镁粉超细粉体压缩实验研究,获取基于离心压缩方式下的压力与粉体体积减小率的动力学方程。结果表明:在离心压强为0~0.3 MPa时,白炭黑和硅镁粉的表观密度与压强的关系可通过Heckel方程坐标表征,曲线特征符合二次函数规律。

The principle of centrifugal separation of biological fluids was used to obtain the final product by centrifugal compression of ultrafine powders on the non-standard centrifuge that was researched by ourselves. The dynamical behavior of centrifugal compression of the powder was analyzed theoretically.The compressive law of the powder under impact compression condition was discussed, and the nonlinear relationship between pressure and porosity of the powder during compression process was studied. The dynamics equation of pressure and volume reduction rate of the powder was obtained by carrying out the experimental study on the superfine powder compression of carbon-white and silicon. The results show that the relationship of apparent density of the carbon-white and the silicon and the pressure is characterized by Heckel equation in the range of centrifugal pressure 0-0.3 MPa, and the curve characteristic accords with the quadratic function law.