某铅锌尾矿粒度与其作水泥混合材性能的灰色关联

水泥混合材中尾矿的掺量和粒度分布对水泥性能有一定影响。为了提高掺加尾矿的水泥混合材的性能,以福建尤溪某铅锌尾矿为主要掺加料,以灰色关联分析为手段,研究了有无减水剂情况下铅锌尾矿粒度分布对水泥混合材胶砂流动度和胶砂试块抗压强度的影响。结果表明:提高尾矿细度有利于提高水泥胶砂的流动度和胶砂试块的抗压强度;在尾矿掺量为30%时,胶砂流动度与胶砂试块的抗压强度均与尾矿中+8.39μm粒级负相关,与-8.39μm粒级正相关,其中与8.39~4.24μm粒级关联度最大,与4.24~2.15、2.15~1.09及1.09~0μm粒级的关联度依次减小;要提高该铅锌尾矿水泥混合材的性能,在尾矿掺量为30%时,应尽量增加-8.39μm粒级的产率,尤其应增加8.39~4.24μm粒级的产率,并尽量降低+8.39μm粒级的产率。

Grey Connection Analysis between Particle Size Distribution of Lead-zinc Tailings and Its Performance as Cement Mixture

The mixture amount and particle size distribution of tailings in cement admixture have a certain influence on the cement property.In order to increase the property of cement admixture with tailings，the effect of particle size distribution of lead-zinc tailings on fluidity and compressive strength of its cement mortar was studied by using a lead-zinc tailing from Youxi county Fujianas province as main admixture through grey connection analysis.The result showed that the mortar′s fluidity and compressive strength can be increased by increasing grinding fineness of the tailings.With the tailings dosage of 30%，both mortar fluidity and compressive strength have a negative correlation with particle size of tailings +8.39 μm，and a positive correlation with particle size of tailings -8.39 μm.Among these，the maximum correlation with particle size of 4.24~8.39 μm，followed by 4.24~2.15 μm，2.15~1.09 μm，1.09~0 μm.To improve the property of cement admixture with lead-zinc tailings，and with the dosage up to 30%，proportion of particles -8.39 μm should be increased，especially the portion of 4.24~8.39 μm，and the portion of particles +8.39 μm should be decreased.