METHOD AND SYSTEM NETWORK FOR TREATING THE CARBON OXIDE ARISING IN THE PRODUCTION OF ALUMINIUM

• Main Authors: BUEKER KARSTEN, SCHEIFF FREDERIK, LEDUC MARC, BODE ANDREAS, ANTWEILER NICOLAI
• Format: Patent
• Language: Chinese; English
• Published: 11.01.2022
• Subjects: APPARATUS THEREFOR; CHEMISTRY; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; METALLURGY; PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY ORREFINING OF METALS

The invention relates to a method for treating an exhaust gas flow (9) arising in a system (7) for producing aluminium via the electrolytic reduction of aluminium oxide in a melt, using at least one anode made of a carbon-containing material, said exhaust gas flow containing carbon oxides due to the reduction of the aluminium oxide by means of the carbon, wherein, according to the invention, at least one sub-flow of the carbon oxide contained in the exhaust gas flow is reacted with hydrogen (23) or mixed with a hydrogen flow and then supplied for utilisation. After a purification and conditioning of the exhaust gas flow in a device (16), e.g. an enrichment with carbon monoxide can then be carried out in a reactor (20) and the syngas obtained in this way can be supplied to a chemical or biotechnological system (25) for the synthesis of valuable chemical substances. 本发明涉及一种处理在经由使用至少一个由含碳材料制成的阳极电解还原熔体中的氧化铝而生产铝的体系(7)中产生的废气流(9)的方法，所述废气流由于借助碳还原氧化铝而含有碳氧化物，其中根据本发明将至少一个废气流中含有的碳氧化物的子流与氢气(23)反应或与氢气流混合，随后供应利用。在设备(16)中纯化和