A flotation method for recovering carbon and electrolyte from waste cathode carbon blocks of aluminum electrolytic cell
A technology of aluminum electrolytic cell waste and cathode carbon blocks, which is applied in flotation, solid separation, etc., can solve the problems of large dosage of chemicals and many stages of flotation, and achieve the goals of less dosage of chemicals, improved economic benefits, and enhanced efficiency Effect
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Embodiment 1
[0037] Step (1): Crushing and milling:
[0038] First use a jaw crusher to crush the cathode carbon block of 1kg of the waste cathode carbon block of the electrolytic aluminum tank to -30mm, then use a fine crusher to crush it to -2mm, and finally use a ball mill to grind it to a particle size of 200 mesh, of which -200 mesh 80%.
[0039] Step (2): Flotation:
[0040]Take the waste cathode carbon powder that has been ground in step (1) and add it to water according to the solid-to-liquid mass ratio of 1:10, then add CaO equivalent to 105% of the soluble fluoride content (or substance amount) until the precipitation is complete; then add Collector composed of 0.45g kerosene and 0.15g sodium oleate, foaming agent: 0.12g methyl isobutyl carbinol, conditioner: 0.3g water glass; flotation for 10min. After flotation, the upper layer is carbon powder and the lower layer is electrolyte. By calculation, the electrolyte recovery rate is 86.25%, the carbon powder purity is 86.53%, and...
Embodiment 2
[0055] Step (1): Crushing and milling:
[0056] First use a jaw crusher to crush the cathode carbon block of 1kg of the waste cathode carbon block of the electrolytic aluminum tank to -30mm, then use a fine crusher to crush it to -2mm, and finally use a ball mill to grind it to a particle size of 200 mesh, of which -200 mesh 85%.
[0057] Step (2): Flotation:
[0058] Take the waste cathode carbon powder that has been ground in step (1) and add it to water according to the solid-to-liquid mass ratio of 1:15, then add CaO equivalent to 110% of the soluble fluoride content (or amount of substance) until the precipitation is complete; then add Collector composed of 0.1g kerosene, 0.2g diesel oil, 0.06g sodium dodecylbenzenesulfonate and 0.09g sodium oleate, foaming agent: No. 2 oil 0.08g and camphor oil 0.04g, conditioner : Water glass 0.25g; flotation 8min. After flotation, the upper layer is carbon powder and the lower layer is electrolyte. By calculation, the electrolyte r...
Embodiment 3
[0060] Compared with Example 2, the difference is that the collector consists of 0.2g kerosene, 0.2g diesel oil, 0.08g sodium dodecylbenzenesulfonate and 0.12g sodium oleate. After flotation, the upper layer is carbon powder and the lower layer is electrolyte. By calculation, the electrolyte recovery rate is 86.29%, the carbon powder purity is 86.33%, and the recovery rate is 86.14%.
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