Dump leaching processing method for waste cathode carbon materials of aluminum electrolytic bath

Disclosed is a dump leaching processing method for waste cathode carbon materials of an aluminum electrolytic bath. The method comprises the following steps that the waste cathode carbon materials in bath residues generated in overhaul of the aluminum electrolytic bath are sorted, and after the waste cathode carbon materials are crushed and screened,pre-leaching, dump leaching and washing are circularly conducted on the waste cathode carbon materials; then pre-leached liquid and dump leached liquid are subjected to oxidative decyanide treatment and then are filter-pressed; and CO2 gas is led into filter-pressed filtered liquid, the filter-pressed filtered liquid then is subjected to carbon-neutralization treatment, through concentration and crystallization, sodium salt is recovered, and a mixture of fluorinated NaHCO3, fluorinated Na2CO3 and NaF is obtained. By means of the dump leaching processing method, innocent treatment and comprehensive using can be conducted on the waste cathode carbon materials of the aluminum electrolytic bath.