花岗岩质洗砂尾泥的资源化利用试验研究

Experimental study on resource utilization of granite washed sand tailings

洗砂尾泥是砂石生产企业在湿法制砂的过程中产生的废弃物,伴生的尾泥处理是砂石企业亟待解决的难题,也是资源高效利用的关键。石灰石质洗砂尾泥一般可直接用于水泥厂生料配料,花岗岩质洗砂尾泥因其钾、钠等元素含量较高,处置相对困难,主要处理方式为露天堆放、制作微晶玻璃、发泡陶瓷、免烧砖、加气板材等,相对石灰石质尾泥而言需要较高的处置成本。根据洗砂尾泥的物化特性,通过用于水泥生料配料以及替代混凝土中粉煤灰的方式处置洗砂尾泥,产品质量未见下降,生产成本有明显降低,有效地利用了花岗岩质洗砂尾泥资源,取得了一定的社会经济效益,对于花岗岩质洗砂尾泥无害化、资源化处置的进一步推广利用具有参考意义。

Sand washing tail mud is a waste generated by sand and gravel production enterprises during the wet sand making process.The treatment of the accompanying tail mud is an urgent problem that sand and gravel enterprises need to solve,and it is also the key to efficient resource utilization.Limestone washed sand tail mud can generally be directly used for raw material batching in cement plants.Granite washed sand tail mud is relatively difficult to dispose of its high content of potassium,sodium and other elements.The main treatment methods are open-air stacking,making microcrystalline glass,foamed ceramics,unburned bricks,aerated boards,etc.,which require higher disposal costs compared to limestone tail mud.Based on the physical and chemical characteristics of sand washing tailings,the disposal of sand washing tailings by using them as cement raw material ingredients and replacing fly ash in concrete has not resulted in a decrease in product quality,but has significantly reduced production costs.The effective utilization of granite sand washing tailings resources has achieved certain social and economic benefits,which has reference significance for the further promotion and utilization of harmless and resourceful disposal of granite sand washing tailings.