Tailings, also called mine dumps, slimes, tails, leach residue, or slickens, are the materials left over after the process of separating the valuable fraction from the uneconomic fraction (gangue) of an ore. Tailings are distinct from overburden or waste rock, which are the materials overlying an ore or mineral body that are displaced during mining without being processed.

The extraction of minerals from ore can be done two ways: placer mining, which uses water and gravity to extract the valuable minerals, or hard rock mining, which uses pulverization of rock, then chemicals. In the latter, the extraction of minerals from ore requires that the ore be ground into fine particles, so tailings are typically small and range from the size of a grain of sand to a few micrometres. Mine tailings are usually produced from the mill in slurry form (a mixture of fine mineral particles and water)

Tailings represent an external cost of mining, and this is particularly true of early mining operations which did not take adequate steps to make tailings areas environmentally safe after closure. Modern day mines, particularly in jurisdictions with well-developed mining regulations and/or operated by responsible mining companies,

incorporate the rehabilitation and proper closure of tailings areas in the mining costs and activities. For example, the province of Quebec, Canada, requires not only submission of closure plan before the start of mining activity, but also the deposit of a financial guarantee equal to 70% of the estimated rehabilitation costs. Tailings dams are often the most significant environmental liability for a mining project.

When applied to coal and oil sands mining, the term 'tailings' refers specifically to fine waste suspended in water.

 Shijiazhuang Longwei Pump Co. Ltd,LWYZ serious submersible slurry pmps are special for tailings transport.

LWYZ pumps

1 vertical centrifugal slurry pump

2 dry shaft dont need shaft seal

3 High chrome materials wear resistant of long use life,rubber liner option to lowest your cost both in pump and maintainence.

4 From 300mm to 1200mm length shaft and optional suction pipe suitable all kinds of sump or pit

Widely use:

Mainly is suitable for the transportation corrosiveness, the big pellet, the highly concentrated dregs thick liquid. Widely applies to department and so on metallurgy, mine, coal, electric power, building materials, environmental protection.