Title:
METHOD AND SYSTEM FOR RECOVERING USEFUL NOBLE METALS ETC. USING HEAT TREATMENT FURNACE
Document Type and Number:
WIPO Patent Application WO/2015/012416
Kind Code:
A2
Abstract:
[Problem] The present invention addresses the problem of simply and reliably recovering useful metals from combustible members of various electronic substrates without fusing or oxidizing said members, even when the various electronic substrates are processed in a heat treatment furnace. [Solution] This method for recovering useful noble metals and the like using a heat treatment furnace comprises: a step in which a prescribed amount of a heat source material such as wood or charcoal, which is placed in the bottom of the heat treatment furnace in advance, is ignited and combusted via an ignition means so as to raise the temperature in the heat treatment furnace, and then measurements of the temperature inside the heat treatment furnace and/or measurements of the temperature of a treatment reaction unit inside the heat treatment furnace are captured by a plurality of temperature sensors disposed at multiple levels in a vertical direction to the heat treatment furnace; a step in which measurements of the temperature in a recombustion furnace are captured by a combustion temperature sensor disposed in the recombustion furnace, while recombusting, by means of the recombustion furnace, exhaust gas inside the heat treatment furnace discharged from the heat treatment furnace; a step in which exhaust gas inside the recombustion furnace, which has been recombusted in the recombustion furnace, is drawn in via an exhaust gas induction device; and a step in which at least the measurements of the temperature inside the heat treatment furnace and/or the measurements of the temperature of the treatment reaction unit inside the heat treatment furnace, or at least the measurements of the temperature inside the heat treatment furnace and/or the measurements of the temperature of the treatment reaction unit inside the heat treatment furnace and the measurements of the temperature inside the recombustion furnace are processed by a temperature management control device. By subsequently adjusting the amount of air, such as oxygen, for combustion via the temperature management control device while introducing said air from a plurality of air introduction bodies disposed at multiple levels in the vertical direction of the heat treatment furnace and/or a plurality of introduction bodies arranged in parallel to the heat treatment furnace inside the heat treatment furnace, which is provided with a negative pressure atmosphere by the exhaust gas induction device, organic waste having combustible members comprising useful noble metals and/or ceramics such as substrates accommodated in the treatment reaction unit can be treated with heat in an incomplete combustion atmosphere and the organic waste, the combustible members of which have been oxidized, can be removed, while uniformly holding and maintaining, for a prescribed time, the temperature of the treatment reaction unit at a predetermined temperature via the temperature management control device.
Inventors:
SEKI MASATOSHI (JP)
MISHIMA EIJI (JP)
MISHIMA EIJI (JP)
Application Number:
PCT/JP2014/071347
Publication Date:
January 29, 2015
Filing Date:
July 25, 2014
Export Citation:
Assignee:
TOOL CORP LTD E (JP)
MATSUMOTO IND CO LTD (JP)
MATSUMOTO IND CO LTD (JP)
International Classes:
F23G5/16; B01D53/34; B01D53/77; B09B3/00; C22B7/00; F23G5/50; F23G7/00
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