Melting system, and process for melting aluminum scrap

An aluminum scrap melting system (1) for melting aluminum scrap, the melting system (1) comprising:

• a melting furnace (10) intended to melt said aluminum scrap, and comprising:
• a drum (11) internally delimiting a melting chamber (13) intended to receive said aluminum scrap to be melted;
• a burner (20) comprising a firing device (21), at least one oxidant injector (23), and at least one fuel injector (25), said oxidant injector (23) being configured to inject an oxidant flow inside the melting chamber (13), said fuel injector (25) being configured to inject a fuel flow inside the melting chamber (13), and the firing device (21) being configured to start a combustion of the oxidant and the fuel injected into the melting chamber (13), to supply heat into the melting chamber (13);
• evacuation means (17) configured to make it possible to extract all or some of the combustion fumes (F) from inside the melting chamber (13) to a vent zone located outside the melting chamber (13) and where air is free to circulate;
• a suction hood (30) disposed outside the melting chamber (13) and intended to capture by suction all or some of said combustion fumes (F) present in the vent zone, said suction hood (30) furthermore comprising an inspection pipe (31) comprising a carbon monoxide sensor (37) configured to measure a value of a carbon monoxide concentration (C) in said combustion fumes (F) captured by the suction hood (30), the carbon monoxide sensor comprising a laser emitter configured to emit a laser radiation, and a laser receiver configured to receive said emitted laser radiation, and to measure an absorption spectrum of said received laser radiation, the value of the carbon monoxide concentration (C) being determined on the basis of said absorption spectrum thus measured;
• a control device (50) configured to receive an item of input information representative of the value of the carbon monoxide concentration (C) measured by the carbon monoxide sensor (37), and to pilot said oxidant flow injected by said oxidant injector (23) and/or said fuel flow injected by said fuel injector (25), according to said item of input information, the oxidant and fuel flows being piloted to contain the volatile organic compound content (VOC) at the output of the melting furnace at concentrations less than a safety value.