Ultrasonic wave alkali leaching and compression acid leaching combined electrolytic aluminum waste cathode carbon block treatment method
A waste cathode carbon block and combined treatment technology, which is applied in chemical instruments and methods, carbon compounds, inorganic chemistry and other directions, can solve the problem that the environmental pollution of electrolytic aluminum waste cathode carbon block has not been effectively solved, the product added value is low, and the processing cost is high. problems, to achieve the effects of significant environmental protection and economic benefits, significant economic value, and low energy consumption
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Embodiment 1
[0036] A method for combined treatment of electrolytic aluminum waste cathode carbon blocks by ultrasonic alkaline leaching and pressure acid leaching, the process flow of the method is as follows figure 1 As shown, the details are as follows:
[0037] (1) Crushing and grinding: First, the electrolytic aluminum waste cathode carbon block is crushed to a particle size of 2 cm, and then the electrolytic aluminum waste cathode carbon block with a particle size of 2 cm is ground into waste cathode carbon powder, waste cathode carbon In the powder, those with a particle size of 0.075 mm accounted for 80 wt%. ;
[0038](2) Ultrasonic alkaline leaching: first add the waste cathode carbon powder obtained in step (1) into a sodium hydroxide solution with a mass fraction of 5% according to the mass volume ratio of 1:5 to obtain an alkaline slurry, and then the alkaline The slurry was ultrasonically treated for 30 minutes at an ultrasonic frequency of 80kHz, a power of 400W, and a temp...
Embodiment 2
[0043] A method for combined treatment of electrolytic aluminum waste cathode carbon blocks by ultrasonic alkaline leaching and pressure acid leaching, the process flow of the method is as follows figure 1 As shown, the details are as follows:
[0044] (1) Crushing and grinding: First, the electrolytic aluminum waste cathode carbon block is crushed to a particle size of 2 cm, and then the electrolytic aluminum waste cathode carbon block with a particle size of 2 cm is ground into waste cathode carbon powder, waste cathode carbon In the powder, those with a particle size of 0.075 mm accounted for 90 wt%. ;
[0045] (2) Ultrasonic alkaline leaching: first add the spent cathode carbon powder obtained in step (1) into a sodium hydroxide solution with a mass fraction of 10% according to the mass-volume ratio of 1:5 to obtain an alkaline slurry, and then the alkaline The slurry was ultrasonically treated for 30 minutes at an ultrasonic frequency of 40kHz, a power of 300W, and a te...
Embodiment 3
[0050] A method for combined treatment of electrolytic aluminum waste cathode carbon blocks by ultrasonic alkaline leaching and pressure acid leaching, the process flow of the method is as follows figure 1 As shown, the details are as follows:
[0051] (1) Crushing and grinding: First, the electrolytic aluminum waste cathode carbon block is crushed to a particle size of 2 cm, and then the electrolytic aluminum waste cathode carbon block with a particle size of 2 cm is ground into waste cathode carbon powder, waste cathode carbon In the powder, those with a particle size of 0.15 mm accounted for 80 wt%. ;
[0052] (2) Ultrasonic alkaline leaching: first add the spent cathode carbon powder obtained in step (1) into a sodium hydroxide solution with a mass fraction of 15% according to the mass-volume ratio of 1:5 to obtain an alkaline slurry, and then the alkaline The slurry was ultrasonically treated for 60 minutes at an ultrasonic frequency of 27kHz, a power of 700W, and a tem...
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