2015年11月25日星期三

The 411 on Mining Slurry Pipelines



The mining industryIndustrial Pipes around the globe makes use of slurry pipelines for transportation of mineral concentrate from mineral processing plants situated near the mine. The ore concentrates are mixed with water, right after which it is pumped into pipelines to a site where the mixture is shipped to other areas for additional processing activities.
The use of slurry pipelines offers visible economic positive aspects when in comparison to transport by railway, particularly in circumstances where mines are located in really remote places. Transportation of tailings by means of slurry pipes also decreases influence on the environment. These pipelines are usually combined with existing railway infrastructures, generally installed above ground, with pipes following the routes from the rail tracks.
Before solids may be transportedBefore mining solidsMining Pipes are ready to be transported, they must undergo a procedure of pulverizations, following which the pulverized material is mixed with water in order to form a paste, or slurry. By way of the slurry pipeline, this substance is then deposited into a mixing tank which consists of huge rotating wheels to facilitate the uniform mixing from the water and also the particles. Right after this method, the slurry is pumped out through the pipeline following which it is transported more than extended distances, powered by specific plungers or piston pumps, aided by gravity and a variety of ground level elevation strategies.
Fine and coarse slurryThe substance of finely ground strong particles in liquid is named fine slurry, whereas bigger particles mixed in with all the liquid make up coarse slurry. When transporting coarse slurry in pipelines exactly where - in order to suspend the solids - the velocity requirements to be high, substantial abrasion for the pipe also as the pumps can take location, paired with high energy consumption. For that reason, coarse slurry pipelines are often only economical and sensible when used over shorter distances, often not much additional than several kilometers away from the mine. Conversely, fine slurry is a lot significantly less abrasive and can consequently be transported over longer distances without having causing too significantly abrasive harm to the slurry pipes.
Handling severe abrasionSlurry pipelines are engineered in such a way that abrasion from solids transportation as well as corrosion triggered by the soil is kept to a minimum. For this objective, most pipelines are coated with high-strength polyethylene. The pipelines are produced to become extremely successful with regards to the absorption of kinetic power on the rough particles which are contained within the slurry, and with regards to their resistance to deformation, preventing damage triggered by the transportation method.
What are they created of? Slurry pipes are frequently produced from either coated or bare steel, ranging in size from 80mm -3200mm pipes, having a range of linings and coatings like galvanized, polyurethane, polyethylene, epoxy, polypropylene and cement mortar.
Standard supplies transported in slurry pipelinesMany diverse forms of material can be transported in slurry pipelines such as copper, iron, limestone, lead, coal, phosphate concentrates, nickel, zinc and bauxite. Soon after ore processing, tailings from mineral processing plants are also transported by means of these pipelines, for the goal of the disposal of remaining rock particles.Pipe Manufacturers
In the destinationWhen the slurry comes out in the other finish on the pipeline, components are separated from the slurry by signifies of filter presses which extract the water. Following this procedure, the water undergoes waste treatment procedures right after which it really is either returned for the mine, or disposed of.

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