超微细铁精矿的粒度特性和润湿性对其成球性能的交互影响

以产自澳洲Pilbara矿区和国内东北地区的两种磁铁精矿作为研究对象,基于Washburn公式所构建的卧式薄板毛细渗透装置,针对粒度特性研究其润湿性对成球性能的影响,并辅以成球性能、造球试验和生球性能检测等一系列的研究,探究铁精矿超微细粒度特性和润湿性对其成球性能的交互影响.结果表明:超微细的粒度特性和润湿性对成球性能产生了较大影响.微细的粒度特性带来的较好的润湿性对提高生球的抗压强度有利.然而,超微细粒度和较窄的粒级分布不利于生球内形成较合理的毛细管半径,进而限制其热稳定性的提高.

Particle size and wettability effect of ultrafine magnetite concentrate on ballability

Two kinds of magnetite concentrates from Pilbara in Australia and an area in the northeast in China were used to ex-plore the effect of wettability, which depends on particle size, on ballability. Capillary osmosis equipment of a horizontal plate was constructed based on the equation Washburn. To investigate the effect of particle size and wettability of ultrafine magnetite concentrates on ballability, ballability, balling test, and performance test were performed. The results suggest that ultrafine particle size and wetta-bility strongly affect ballability. Its better wettability on account of particle ultrafine size characteristic is beneficial to improve its com-pressive strength. However, a narrow ultrafine particle-size distribution will limit the improvements in ballability, because it affects the capillary radius.