# US 2014/0151943 A1 · Valuable metal recovery apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0151943 A1 - Document ID: US20140151943A1 - Status: Published application - Kind: A1 - Application number: 13/690,020 - Filed: 2012-11-30 - Published: 2014-06-05 - Earliest claimed: 2012-11-30 - Assignees: Nippon Crucible Co., Ltd. - Applicants: Nippon Crucible Co., Ltd. - Inventors: Tamio Okada; Long Yun Piao; Sadanori Furusawa; Yusuke Sano; Katsuyuki Shirakawa; Hideo Yoshikawa - Web page: https://patentgrep.com/patent/US20140151943A1 ## CPC - F27B 14/143: {Heating of the crucible by convection of combustion gases} - F27D 17/17: for preheating fluids, e.g. air or gases - F27D 17/20: Arrangements for treatment or cleaning of waste gases - F27B: FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS - F27D: DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE ## Abstract The present invention provides a valuable metal recovery apparatus capable of discharging clean exhaust gas. The apparatus 1 includes a furnace body 2; a heating container 3; a first combustion burner 10 for supplying heated gas into the furnace body 2; a tower 4 projecting upward from the furnace body 2; a gas combustion chamber 5 communicating with the tower 4 and being used for receiving unburned gas generated upon heating of a material to be treated; a second combustion burner 11 for supplying heated gas into the gas combustion chamber 5; a gas introducing passage 7 for introducing combustion gas generated in the gas combustion chamber 5 into the furnace body 2; a flue 21 for discharging the combustion gas in the furnace body 2 to the outside; and a support 8 supporting the furnace body 2 such that the furnace body 2 can be tilted. ## Claims ### Claim 1 A valuable metal recovery apparatus comprising: a heating container for storing a material to be treated; a furnace body accommodating the heating container; a first combustion burner for supplying heated gas into the furnace body to heat the heating container; a cylindrical tower detachably provided above the furnace body, the cylindrical tower having an input port for introducing a material to be treated, and the cylindrical tower being used for receiving unburned gas generated upon heating of the material to be treated; a gas combustion chamber communicating with the tower, the gas combustion chamber being used for receiving the unburned gas from the tower; a second combustion burner for supplying heated gas into the gas combustion chamber to burn the unburned gas; a gas introducing passage for introducing combustion gas generated in the gas combustion chamber into the furnace body; a flue integrally provided with the furnace body, the flue being used for discharging the combustion gas in the furnace body to the outside; and a support supporting the furnace body such that the furnace body can be tilted. ### Claim 2 (depends on 1) The valuable metal recovery apparatus according to claim 1, wherein the furnace body has a third combustion burner that is disposed above the heating container and that is used for supplying heated gas to burn the unburned gas discharged into the tower. ### Claim 3 (depends on 1) The valuable metal recovery apparatus according to claim 1, wherein the tower and the furnace body are detachably connected by a connection means, the connection means comprising: an insertion member provided on the outer peripheral surface of the tower, a receiver provided on the outer peripheral surface of the furnace body, the receiver being used for receiving the insertion member, and an elastic heat insulating material provided inside the receiver, and wherein when the insertion member is inserted into the heat insulating material, the tower and the furnace body are airtightly connected to each other. ### Claim 4 (depends on 3) The valuable metal recovery apparatus according to claim 3, wherein the heat insulating material comprises ceramic fibers. ### Claim 5 (depends on 2) The valuable metal recovery apparatus according to claim 2, further comprising a lattice formed from a plurality of rod-shaped members, the lattice being disposed within the tower, such that at least a portion of the material to be treated introduced from the input port can temporarily stay on the lattice. ### Claim 6 (depends on 5) The valuable metal recovery apparatus according to claim 5, wherein the lattice is disposed directly above or directly below the third combustion burner. ### Claim 7 (depends on 5) The valuable metal recovery apparatus according to claim 5, wherein the rod-shaped member is formed in a pipe shape so as to have an internal passage for air, the rod-shaped member having on its peripheral surface at least one through hole for discharging air that flows through the passage to the outside of the rod-shaped member. ### Claim 8 (depends on 2) The valuable metal recovery apparatus according to claim 2, wherein the furnace body has between itself and the tower a burner mounting unit having an internal diameter greater than that of the tower, the burner mounting unit being provided with the third combustion burner for supplying heated gas into the burner mounting unit. ### Claim 9 (depends on 8) The valuable metal recovery apparatus according to claim 8, wherein the burner mounting unit has in its interior a ring-like threshold member, and wherein the third combustion burner is disposed such that heated gas flows outside the threshold member, the threshold member being provided with a communication path communicating between the inside and outside of the threshold member. ### Claim 10 (depends on 8) The valuable metal recovery apparatus according to claim 8, wherein the tower accommodates a cylindrical inner tube such that a space is formed between the inner tube and the inner peripheral surface of the tower, and wherein the third combustion burner is disposed such that heated gas flows outside the inner tube, the inner tube having on its outer peripheral surface slit-like openings for introducing heated gas supplied from the third combustion burner into the inner tube. ### Claim 11 (depends on 1) The valuable metal recovery apparatus according to claim 1, wherein the second combustion burner is disposed in the vicinity of a gas outlet of the tower.