Electrolytic aluminum waste cathode carbon block gasification and reburning denitration method

The invention discloses an electrolytic aluminum waste cathode carbon block gasification and reburning denitration method, which comprises the following steps of: crushing electrolytic aluminum wastecathode carbon, mixing the crushed electrolytic aluminum waste cathode carbon with quick lime and water, and carrying out ball milling to prepare carbon slurry; gasifying the carbon slurry, and controlling the gasification temperature above the melting temperature of cryolite and below 1500DEG C. According to the method, recycling of aluminum oxide and fluoride of the carbon block ash residue is achieved, gasified gas serves as clean fuel or coal-fired boiler reburning fuel, the carbon block disposal amount is large, and the process is clean and efficient. 本发明公开了一种电解铝废旧阴极炭块气化及再燃脱硝方法，包括如下步骤：将电解铝废旧阴极炭破碎，与生石灰和水混合球磨，制成炭浆；将炭浆气化，气化温度为冰晶石熔化温度以上，1500℃以下。该方法实现炭块灰渣的氧化铝和氟化物的再循环利用，气化气用作清洁燃料，或用于燃煤锅炉再燃燃料，炭块处置量大，工艺清洁高效。