熔渣离心成纤及纤维拉伸变形研究

Research on the centrifugal fiber formation of molten slags and tensile deformation of fiber

近年来,熔融矿渣制备矿渣纤维已成了有效利用资源的新途径,对于冶金熔渣的研究通常建立在牛顿流体的基础上。然而由于温度等因素的变化,熔渣会表现出剪切变稀的非牛顿流体特性,熔渣纤维化过程经历了从牛顿流体向非牛顿流体的转变过程。本文针对流体的离心成纤机理进行了研究,提出了旋转雾化设备最不稳定扰动出现时的波长的方程,并进行了离心成纤实验。参考剪切变稀特性对流体射流的影响,分析了剪切变稀特性以及应变速率在纤维拉伸阶段的影响,为进一步深入研究熔渣的纤维化机理提供了思路。

In the past few years, the preparation of slag fibre using melt fiberization method has become a new way to effectively utilize resources. The research on metallurgical slag is generally based on Newtonian fluid. However, due to changes in temperature and other factors, the slag exhibits the characteristics of shear- thinning non-Newtonian fluid, and the fiberization process of molten slag experienced a transition from Newtonian fluid to non-Newtonian fluid. In this paper, the mechanism of centrifugal fiber-forming is studied. The equation of the wavelength of the most unstable disturbance in the rotating atomization equipment is presented, and the fiberization process of molten slag was studied experimentally through centrifugal method. With reference to the influence of shear thinning characteristics on fluid jet, the effects of shearthinning characteristics and strain rate on the fiber drawing stage are analyzed,which provided a way for further research on the fiberization mechanism of molten slag.