single superphosphate (run-of-pile) chem.

[Мирослав9999]

Никто не знает, что такое run-of-pile? Всем заранее благодарен за помощь.

[Armagedo]

Triple Superphosphates
Two processes have been used to produce triple superphosphate: run-of-the-pile (ROPTSP) and granular (GTSP). At this time, no facilities in the U.S. are currently producing ROPTSP, but a process description is given.

The ROP-TSP material is essentially a pulverized mass of variable particle size produced in a manner similar to normal superphosphate. Wet-process phosphoric acid (50 to 55 percent P2O5) is reacted with ground phosphate rock in a cone mixer. The resultant slurry begins to solidify on a slow moving conveyer en route to the curing area. At the point of discharge from the den, the material passes through a rotary mechanical cutter that breaks up the solid mass.
Coarse ROP-TSP product is sent to a storage pile and cured for three to five weeks. The product is then mined from the storage pile to be crushed, screened, and shipped in bulk.

Granular triple superphosphate yields larger, more uniform particles with improved storage and handling properties. Most of this material is made with the Dorr-Oliver slurry granulation process, illustrated in Figure 2.2-2.

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The disintegrated TSP (sometimes called run-of-pile TSP or ROP-TSP) may be used for making compound fertilizer by agglomeration granulation

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