Valuable matter recovery method

1 . A method for recovering a valuable substance, the method comprising:

thermally treating a target containing a valuable substance while supporting a target storing unit, in which the target is stored, by a supporting unit that can support the target storing unit, wherein the thermally treating includes heating a gas present in a region, in which the supporting unit is positioned, by a flame for thermally treating the target such that the target storing unit is not contacted by the flame; and

recovering the valuable substance from a thermally treated product obtained by thermally treating the target,

wherein, in the thermally treating, by directing the flame in an approximately horizontal direction by using two burners below the target storing unit, the target is heated by causing a heated gas to rise while preventing the flame from contacting the target storing unit,

wherein, when the two burners are viewed from above the target storing unit, and when one of the two burners is disposed on an upper left side, the other burner of the two burners is disposed on a lower right side, and a partition is provided between the one burner of the two burners and the other burner of the two burners.

2 . The method for recovering a valuable substance according to claim 1 ,

wherein each burner of the two burners has a tubular member that is configured to radiate the flame and at least one end of which is open, and

the burner radiates the flame such that the flame does not go outside the tubular member.

3 . The method for recovering a valuable substance according to claim 1 ,

wherein the target storing unit is placeable on the supporting unit, and

the thermally treating is performed while the target storing unit is placed on the supporting unit.

4 . The method for recovering a valuable substance according to claim 1 ,

wherein the target storing unit is formed of iron or stainless steel.

5 . The method for recovering a valuable substance according to claim 1 ,

wherein in the thermally treating, the target is thermally treated at 750° C. or higher and lower than 1,085° C.

6 . The method for recovering a valuable substance according to claim 1 ,

wherein the target is a lithium ion secondary battery.

7 . The method for recovering a valuable substance according to claim 6 ,

wherein the lithium ion secondary battery has a housing containing aluminum, and

in the thermally treating, the aluminum of the housing of the lithium ion secondary battery is melted and a melted product is separated.

8 . The method for recovering a valuable substance according to claim 6 ,

wherein the valuable substance contains copper.

9 . The method for recovering a valuable substance according to claim 6 ,

wherein in the thermally treating, a combustion state of the lithium ion secondary battery is observed to judge whether combustion of the lithium ion secondary battery has finished or not, and

when it is judged that combustion of the lithium ion secondary battery has finished, the thermally treating is terminated.

10 . The method for recovering a valuable substance according to claim 1 ,

wherein the recovering the valuable substance includes:

pulverizing the thermally treated product, to obtain a pulverized product;

classifying the pulverized product at a classification point that is greater than or equal to 0.6 mm and less than or equal to 2.4 mm, to obtain a coarse-grained product, a size of the coarse-grained product being larger than or equal to the classification point, and a fine-grained product, a size of the fine-grained product being smaller than the classification point; and

sorting the coarse-grained product using a magnet having a magnetic flux density of 0.03 tesla or higher.