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Method of regenerating anti-seepage material from waste aluminium electrolytic tank lining
The invention provides a method of regenerating an anti-seepage material from a waste aluminium electrolytic tank lining. The method includes following steps: A) sorting waste cathode carbon blocks, waste fireproofing materials and waste cathode steel bars in the waste aluminium electrolytic tank lining according to classification; B) crushing the sorted fireproofing materials into a powder being 0.9-3 mm in granular size; and C) heating the powder at 400-450 DEG C for 2-4 h; mixing the powder with aluminum oxide, calcium oxide, magnesium oxide according to the following mass ratio: 15-30% of the aluminum oxide, 3-5% of the calcium oxide, 3-5% of the magnesium oxide and the balanced being the waste fireproofing materials, wherein the sum of the mass percentages of the components is 100%. The method achieves recycling of the non-carbon substances, such as heat insulation bricks, fireproofing bricks, anti-seepage materials and castables and the like, in the waste aluminium electrolytic tank lining, reduces safe potential risk, transportation and treatment cost of emission of the wastes generated from an aluminium electrolytic tank, greatly reduces production cost, and meanwhile enables harmful and toxic substances to be fully treated, so that the regenerated anti-seepage material is toxic-free and harmless. The method is reduced in thermal-treatment cost and is increased in economic and environmental benefits.
Method of regenerating anti-seepage material from waste aluminium electrolytic tank lining
The invention provides a method of regenerating an anti-seepage material from a waste aluminium electrolytic tank lining. The method includes following steps: A) sorting waste cathode carbon blocks, waste fireproofing materials and waste cathode steel bars in the waste aluminium electrolytic tank lining according to classification; B) crushing the sorted fireproofing materials into a powder being 0.9-3 mm in granular size; and C) heating the powder at 400-450 DEG C for 2-4 h; mixing the powder with aluminum oxide, calcium oxide, magnesium oxide according to the following mass ratio: 15-30% of the aluminum oxide, 3-5% of the calcium oxide, 3-5% of the magnesium oxide and the balanced being the waste fireproofing materials, wherein the sum of the mass percentages of the components is 100%. The method achieves recycling of the non-carbon substances, such as heat insulation bricks, fireproofing bricks, anti-seepage materials and castables and the like, in the waste aluminium electrolytic tank lining, reduces safe potential risk, transportation and treatment cost of emission of the wastes generated from an aluminium electrolytic tank, greatly reduces production cost, and meanwhile enables harmful and toxic substances to be fully treated, so that the regenerated anti-seepage material is toxic-free and harmless. The method is reduced in thermal-treatment cost and is increased in economic and environmental benefits.
Method of regenerating anti-seepage material from waste aluminium electrolytic tank lining
XING DAQING (author) / YANG WANZHANG (author) / CHEN BENSONG (author) / BA GUOHUI (author)
2015-12-09
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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