China's lead and zinc mining

China lead-zinc mining, underground mining, but a few mining or open-pit mining for the first open-pit mining, underground mining and changed.
Underground mining, the current mining depth is generally 300 ~ 800m. The mining method, according to the topography of the deposit, the occurrence of the ore body, the scale and the depth of burial, usually use four methods: shaft, flat and joint development and inclined well development. Here are a list of 10 large mines, as shown in the table below:

Conveyor

SCREW Conveyor is mainly used with conveying powdery, granular and small pieces of material, can be matched with other equipment, used to feed, can also work alone, but it is not suitable for conveying metamorphic, viscous and easy to agglomerate materials. Screw conveyor commonly known as the twisted dragon, is a mineral, feed, grain and oil, construction in the use of a conveying equipment widely, from the Angle of the conveying material displacement direction, screw conveyor is divided into horizontal screw conveyor and two types of vertical screw conveyor, mainly used for the various powder, granulated and small lump of loose materials such as horizontal and vertical ascent. Screw conveyor is made of steel, screw conveyor used for conveying high temperature powder or solid particles and other chemical, food, medicine, building materials and other equipment. The inside of the screw conveyor is a conveying pipe, and the blades are welded in a spiral shape on the conveying pipe.