Autoclave apparatus used during high-pressure acid leaching process

An autoclave apparatus used during a high-pressure acid leaching process, the autoclave apparatus comprising:

• a cylindrical main body partitioned into a plurality of compartments by partition walls;
• stirrers provided in the respective compartments for transferring slurry from an upstream side compartment to a downstream side compartment to sequentially advance leaching;
• opening portions for a manway provided in bottom portions of each of the respective partition walls such that the opening portions do not reach end portions of the partition walls;
• and
• rectangular liquid flow ports for slurry transfer provided on manway doors of the respective opening portions, each liquid flow port having a liquid flow port door for opening or closing the liquid flow port,
• wherein the liquid flow ports are installed at positions where the heights from the lowermost portion of the autoclave to the center of gravity of the liquid flow port doors are 0.1 times to 0.3 times an autoclave diameter and distances from the longitudinal center lines of the partition walls to the center of gravity of the liquid flow port doors are 0.05 times to 0.25 times the autoclave diameter.