Aluminum electrolysis waste cathode carbon block fused salt pyrolysis combined water leaching defluorination and carbon extraction treatment method

The invention discloses an aluminum electrolysis waste cathode carbon block fused salt pyrolysis combined water leaching defluorination and carbon extraction treatment method, and belongs to the technical field of aluminum electrolysis in the aluminum industry. According to the treatment method, binary fused salt NaOH-Na2CO3 is added when aluminum electrolysis waste cathode carbon blocks are subjected to pyrolysis treatment, the initial temperature of SCCB decomposition can be reduced, and the energy consumption can be reduced; the content of fluoride in heat treatment residues can be obviously reduced, and the leaching concentration of fluoride ions is reduced to 17.8 mg/L from 4620 mg/L; and the carbon content is also improved. 本发明公开一种铝电解废阴极炭块熔盐热解结合水浸脱氟提碳处理方法，属于铝工业铝电解技术领域，该处理方法为在热解处理铝电解废旧阴极炭块时加入二元熔盐NaOH-Na2CO3，不仅可以降低SCCB分解的起始温度，还可以明显减少热处理残留物中的氟化物含量，以及氟化物离子浸出浓度由4620mg/L降至17.8mg/L；还提高了其含碳量。