Recovering Low-grade Resource in Meiziwo Tungsten Ore

As we all know, ore resource is kind of exhaustibility and non- renewable mineral resource. In order to improve the use ratio of ore resource to recycle the low-grade ore in the cutoff grade edge play an important role in improve the use ratio of ore resource. The ore deposit of Meiziwo mine lot is igneous rock postmetamorphism high temperature hydrothermal fissure filling, quartz-vein type wolframite deposit. The high-grade tungsten ore in Meiziwo rich ore worked out and the storage content high grade tungsten ore it is lesser. But the production capacity of Meiziwo is still high, so in order to increase the service year of Meiziwo tungsten ore and improve use ratio of ore Meiziwo has employed recovering low-grade resource.
The mining technology of Meiziwo low grade tungsten ore recovering project is shallow-hole shrinkage mining. The concrete practices are as follow: to set gangue funnel at the both ends stope and ore caving uses secondary ore caving. The first time ore caving make barren rock fall down. And the second time ore caving the aim is gangue. Finally, putting the gangue in the gangue funnel and then take it out. Secondary ore caving not only can separate the barren rock and gangue rock but also reduce the rate of dilution of Meiziwo and improve the ore extracting ratio in mining. After take gangue out should employ diagrid by ore pass or dressing plant. So it can decrease the dilution rate and can reduce freight volume and mineral processing volume.
According to statistics, Meiziwo low-grade tungsten ore recovering ore-extracting ratio in mining is 93%, 91% of dilition rate and multipurpose utilization is 92%. All index of Meziwo reach the same level or higher than same industry. Meziwo low grade tungsten ore recovering not only protect mineral resources but also improve the economic benefit.

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