Sulfuric acid adding facility and operation method therefor

Provided are a sulfuric acid adding facility and an operation method therefor which enable an increase in the maximum capacity and the operation rate of a sulfuric acid supply pump provided in the sulfuric acid adding facility. In a sulfuric acid adding facility 10, sulfuric acid is added to an auto...

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Bibliographische Detailangaben
Hauptverfasser: Sato, Hideaki, Shirai, Sho, Nakai, Osamu, Oku, Masayuki, Sakamoto, Takashi
Format: Patent
Sprache:eng
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Zusammenfassung:Provided are a sulfuric acid adding facility and an operation method therefor which enable an increase in the maximum capacity and the operation rate of a sulfuric acid supply pump provided in the sulfuric acid adding facility. In a sulfuric acid adding facility 10, sulfuric acid is added to an autoclave 1 used in a leaching step of a high pressure acid leaching (HPAL) method for a nickel oxide ore. The sulfuric acid adding facility is provided with the same number (n+1) (n is an integer, at least 1) of each of the following: a plurality of sulfuric acid adding pipes 11 for adding sulfuric acid into the autoclave 1; and a plurality of sulfuric acid supply pumps 12 for supplying sulfuric acid to the sulfuric acid adding pipes 11. Each of the first through n+1th sulfuric acid supply pumps 12 includes at least three diaphragms 21 and discharge ports 22 of the same number as that of the diaphragms 21. The discharge ports 22 of more than half the diaphragms 21, from among the at least three diaphragms 21 of the kth (k is an integer, from 1 to n+1) sulfuric acid supply pump 12 are connected to the kth sulfuric acid adding pipe 11, and the discharge ports 22 of less than half the diaphragms 21 are connected to a sulfuric acid adding pipe 11 other than the kth sulfuric acid adding pipe 11.