Reaction container, and leach treatment method for metal raw material using said reaction container

Provided is a method for effectively supplying oxygen to a slurry with which a reaction container is loaded, and thereby effectively causing a leaching reaction, during a leaching treatment which is performed using an acid such as sulfuric acid, while blowing oxygen at high temperature and high pressure. This autoclave device 1 is for being loaded with an ore slurry, and performing a leaching treatment for leaching metals (Ni, Co) contained in the ore by adding sulfuric acid at high temperature and high pressure, and is provided with an oxygen blow pipe 13 for blowing oxygen to the ore slurry, wherein the oxygen blow pipe 13 is disposed such that an oxygen outlet 31A of the oxygen blow pipe 13 is located in a gas phase portion 11G in the autoclave device 1 which is loaded with the ore slurry.