铜渣尾矿制备空心陶瓷微球及其表征

以铜渣尾矿为原料, 利用火焰喷枪熔射法制备空心陶瓷微球, 研究了淬熄距离对陶瓷微球形貌与性能的影响。结果表明, 淬熄距离为400 mm时, 制成的微球粒径分布均匀,直径15~30 μm, 经破碎确认为空心球。成球机理是铜渣尾矿粉末受热逐渐熔化过程中, 发气物质产生气体并合并, 当高温液滴喷射进入水中快速冷却凝固时, 液滴中气体无法逸出, 从而形成空心陶瓷微球。

Preparation and Characterization of Hollow Ceramic Microspheres Using Copper Slag Tailings

With copper slag tailings as raw materials, hollow ceramic microspheres were prepared by using thermal spraying techniques with a flame gun. The effect of quenching distance on the morphology and properties of ceramic microspheres was explored. The results show that when the quenching distance is 400 mm, the prepared microspheres are 15~30 μm in diameter with a uniform particle size distribution, and confirmed to be hollow spheres after crushing. The mechanism for microsphere preparation is that gaseous materials generate gas, which aggregates during the gradual melting process of powdered copper slag tailings. When high-temperature droplets are sprayed into the water, the gas in the droplets cannot escape after the quick cooling and solidification, thus hollow ceramic microspheres are formed.