In China, ten ministries including the Ministry of Industry and Information Technology issued the “Several Opinions on Promoting the High-quality Development of the Mechanism Sand and Stone Industry”, stating that the management of sand and gravel resources should be regulated and the use of waste rock and the tailings of iron, molybdenum, vanadium and titanium mines should be encouraged Produce manufactured sand and gravel, save natural resources, and improve the comprehensive utilization level of industrial solid waste. In particular, it is proposed to encourage the use of molybdenum tailings to produce manufactured sand and crushed stone.
Today we introduce a case of using molybdenum ore waste rock and tailings to prepare M-sand and crushed stone aggregate.
A sand and gravel aggregate project with an annual output of 13.5 million tons in China’s Jilin Province will be put into operation in October this year. The raw material used is molybdenum tailings.
The project uses the mining and stripped waste rock produced by the local molybdenum ore project as raw materials to process and produce sand and gravel aggregates for construction, with a total investment of 200 million RMB. After the first phase of the project is put into operation, it can process more than 5 million tons of waste rock and produce 4.5 million tons of sand and gravel aggregates per year. After the second phase of the project is put into operation, the annual waste rock treatment can reach 15 million tons, and the annual output of sand and gravel aggregates will be 13.5 million tons. The annual output value is 270 million RMB, and the profits and taxes are 40 million RMB.
The project adopts domestic advanced sand and gravel aggregate production technology and processing equipment, and is fully enclosed to achieve the purpose of environmental protection and energy saving. It will not only digest the waste rock produced by the molybdenum ore project, but also reduce the waste rock accumulation and occupation of farmland and forest land. Reduce the environmental damage caused by natural sand and gravel mining, change the supply structure of local sand and gravel for construction, and save resources.
Sand and gravel aggregate processing can not only solve the shortage of construction sand, but also have a positive effect on improving the quality of sand and gravel. The construction of waste treatment projects in situ in ore mining areas not only minimizes pollution, but also realizes waste utilization and maximizes economic benefits.