Research and Application of Cementing Filling Technology of Xulou Iron Mine Tailings

China's mineral resources are relatively complete,but there are many poor ore,co-contained ore and refractory smelting,which will produce a large number of tailings,and it is increasing year by year.Not only can make full use of tailings comprehensive utilization of mineral resources,mineral expand the scope of use,to extend the mine life,reduce environmental pollution,but also save a lot of land and capital,resulting in huge economic and social benefits,sustainable development of mining The inevitable choice.
In recent years,the filling technology with tailings sand as the main filling material has developed rapidly,such as water sand filling,full tail sand cementing filling,graded tailings cement filling,high concentration full tailings cement filling,paste pumping filling,paste-like cement filling,(super)high water speed fillingand so on.Scholars at home and abroad have carried out a large number of basic theories and experimental research,and have achieved rich results.

Xu Anhui iron ore is a floor-contact type account skarn magnetite ore depth of 48~385m,using underground backfill mining.The total resource of the 56 district of Xulou Mine is about 30 million tons.According to the 80%recovery rate,it is estimated that about 24 million tons of ore will be produced,and the total tailings will be about 6.2 million tons(3.3 million m3).The first phase of the iron ore mine will be used to mine the Shilou deposit,and the ore body with a level above 100m will have a total reserve of 5.39 million tons,a production capacity of 400,000 t/a,and an annual output of 100,000 tons(50,000 m3)of tailings..In order to ensure safe,efficient and environmentally friendly mining,tailings must be disposed of properly.