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Method for preparing prebaked anode for aluminum electrolysis by doping waste cathode
The invention relates to a method for preparing a prebaked anode for aluminum electrolysis by doping a waste cathode. The method comprises the following steps: ball-milling and activating the waste cathode, calcining and activating the waste cathode, and doping the waste cathode to prepare the prebaked anode. The method comprises the following steps: drying and crushing waste cathodes, and performing dry ball-milling activation in a ball mill; calcining and activating the ball-milled material in a box-type resistance furnace; the activated material, petroleum coke, asphalt, anode scrap and the like are subjected to burdening, mixing and kneading, forming, drying and calcining to prepare the prebaked anode. The waste cathode is used as a doping agent to prepare the prebaked anode, the carbon material in the prebaked anode is fully utilized, meanwhile, electrolyte components such as aluminum fluoride, sodium fluoride and cryolite return to an electrolytic cell along with the prebaked anode, and self-absorption of hazardous waste is achieved. According to the invention, the preparation process of the prebaked anode is not changed, and the process cohesion is good; and moreover, the environmental harm caused by the waste cathode is effectively solved, the manufacturing cost of the prebaked anode is reduced, and the method has important significance on energy conservation and emission reduction, comprehensive utilization of resources and environmental protection in the aluminum electrolysis industry.
本发明涉及一种废旧阴极掺杂制备铝电解用预焙阳极的方法，由“废旧阴极球磨活化‑废旧阴极煅烧活化‑废旧阴极掺杂制备预焙阳极”构成。废旧阴极经干燥、破碎后在球磨机中干法球磨活化；球磨料在箱式电阻炉中煅烧活化；活化料与石油焦、沥青、残阳极等经配料、混捏、成型、干燥、煅烧制备预焙阳极。以废旧阴极作为掺杂剂制备预焙阳极，不仅充分利用了其中的炭质材料，同时其中的氟化铝、氟化钠、冰晶石等电解质成分随预焙阳极返回电解槽，实现危废的自我消纳。本发明不改变预焙阳极制备工艺，工艺间衔接性好；且有效地解决了废旧阴极带来的环境危害，降低了预焙阳极的制造成本，对铝电解行业的节能减排、资源综合利用和环境保护均有重要意义。
Method for preparing prebaked anode for aluminum electrolysis by doping waste cathode
The invention relates to a method for preparing a prebaked anode for aluminum electrolysis by doping a waste cathode. The method comprises the following steps: ball-milling and activating the waste cathode, calcining and activating the waste cathode, and doping the waste cathode to prepare the prebaked anode. The method comprises the following steps: drying and crushing waste cathodes, and performing dry ball-milling activation in a ball mill; calcining and activating the ball-milled material in a box-type resistance furnace; the activated material, petroleum coke, asphalt, anode scrap and the like are subjected to burdening, mixing and kneading, forming, drying and calcining to prepare the prebaked anode. The waste cathode is used as a doping agent to prepare the prebaked anode, the carbon material in the prebaked anode is fully utilized, meanwhile, electrolyte components such as aluminum fluoride, sodium fluoride and cryolite return to an electrolytic cell along with the prebaked anode, and self-absorption of hazardous waste is achieved. According to the invention, the preparation process of the prebaked anode is not changed, and the process cohesion is good; and moreover, the environmental harm caused by the waste cathode is effectively solved, the manufacturing cost of the prebaked anode is reduced, and the method has important significance on energy conservation and emission reduction, comprehensive utilization of resources and environmental protection in the aluminum electrolysis industry.
本发明涉及一种废旧阴极掺杂制备铝电解用预焙阳极的方法，由“废旧阴极球磨活化‑废旧阴极煅烧活化‑废旧阴极掺杂制备预焙阳极”构成。废旧阴极经干燥、破碎后在球磨机中干法球磨活化；球磨料在箱式电阻炉中煅烧活化；活化料与石油焦、沥青、残阳极等经配料、混捏、成型、干燥、煅烧制备预焙阳极。以废旧阴极作为掺杂剂制备预焙阳极，不仅充分利用了其中的炭质材料，同时其中的氟化铝、氟化钠、冰晶石等电解质成分随预焙阳极返回电解槽，实现危废的自我消纳。本发明不改变预焙阳极制备工艺，工艺间衔接性好；且有效地解决了废旧阴极带来的环境危害，降低了预焙阳极的制造成本，对铝电解行业的节能减排、资源综合利用和环境保护均有重要意义。
Method for preparing prebaked anode for aluminum electrolysis by doping waste cathode
一种废旧阴极掺杂制备铝电解用预焙阳极的方法
WANG SHENG (author) / DUAN ZHONGBO (author) / YANG CHENGLIANG (author) / LIU HAIFENG (author) / BU XUDONG (author) / WU XIANGZI (author) / WEI ZHENPENG (author) / CHENG JIUYUAN (author)
2023-09-05
Patent
Electronic Resource
Chinese
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