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Preparation method of low-carbon-residue prebaked anode for aluminum electrolysis
The invention discloses a preparation method of a low-carbon residue prepared anode for aluminum electrolysis, which comprises the following steps: (1) calcining petroleum coke at high temperature to obtain calcined coke, and crushing and screening the calcined coke to obtain coke aggregate and powder with different granularities; (2) mixing and kneading the calcined coke, the modified asphalt, the anode scrap and the additive to obtain a paste material, and molding the paste material in a molding machine to obtain a prebaked anode green body; (3) carrying out preheating, roasting and secondary roasting on the prebaked anode green body to obtain a prebaked anode; in the preheating step, the temperature is increased to 350-400 DEG C at the speed of 15-20 DEG C/h, and heat preservation is conducted for 3-6 h In the roasting process, the temperature is increased to 1150-1170 DEG C from the room temperature at the speed of 50-65 DEG C/h, and heat preservation is conducted for 18-26 h; in the secondary calcination, the temperature is increased to 1500-1600 DEG C from the room temperature at the speed of 50-65 DEG C/h, and heat preservation is conducted for 35-45 h. According to the method disclosed by the invention, the formula and the production process of the prebaked anode are optimized, so that each index of the prepared prebaked anode reaches or is superior to the standard. Particularly, the anode slag falling amount of the electrolytic cell is effectively reduced, and stable and efficient operation of the electrolytic cell is ensured.
本发明公开了一种铝电解用低炭渣预备阳极制备方法，包括以下步骤：(1)将石油焦经高温煅烧后得到煅后焦，煅后焦进行破碎、筛分，得到不同粒度焦骨料和粉料；(2)将煅后焦、改性沥青、残极、添加剂进行混捏，得到糊料在成型机中成型，得到预焙阳极生坯；(3)将预焙阳极生坯进行预热、焙烧和二次煅烧，得到预焙阳极；所述预热以15‑20℃/h升温至350‑400℃，并保温3‑6h；所述焙烧为以50‑65℃/h从室温升温至1150‑1170℃，并保温18‑26h；所述二次煅烧为以50‑65℃/h从室温升温至1500‑1600℃，并保温35‑45h。本发明的方法，通优化预焙阳极的配方和生产工艺，使得制备得到的预焙阳极各项指标均达到或优于标准。尤其是有效降低电解槽阳极掉渣量，确保电解槽平稳高效运行。
Preparation method of low-carbon-residue prebaked anode for aluminum electrolysis
The invention discloses a preparation method of a low-carbon residue prepared anode for aluminum electrolysis, which comprises the following steps: (1) calcining petroleum coke at high temperature to obtain calcined coke, and crushing and screening the calcined coke to obtain coke aggregate and powder with different granularities; (2) mixing and kneading the calcined coke, the modified asphalt, the anode scrap and the additive to obtain a paste material, and molding the paste material in a molding machine to obtain a prebaked anode green body; (3) carrying out preheating, roasting and secondary roasting on the prebaked anode green body to obtain a prebaked anode; in the preheating step, the temperature is increased to 350-400 DEG C at the speed of 15-20 DEG C/h, and heat preservation is conducted for 3-6 h In the roasting process, the temperature is increased to 1150-1170 DEG C from the room temperature at the speed of 50-65 DEG C/h, and heat preservation is conducted for 18-26 h; in the secondary calcination, the temperature is increased to 1500-1600 DEG C from the room temperature at the speed of 50-65 DEG C/h, and heat preservation is conducted for 35-45 h. According to the method disclosed by the invention, the formula and the production process of the prebaked anode are optimized, so that each index of the prepared prebaked anode reaches or is superior to the standard. Particularly, the anode slag falling amount of the electrolytic cell is effectively reduced, and stable and efficient operation of the electrolytic cell is ensured.
本发明公开了一种铝电解用低炭渣预备阳极制备方法，包括以下步骤：(1)将石油焦经高温煅烧后得到煅后焦，煅后焦进行破碎、筛分，得到不同粒度焦骨料和粉料；(2)将煅后焦、改性沥青、残极、添加剂进行混捏，得到糊料在成型机中成型，得到预焙阳极生坯；(3)将预焙阳极生坯进行预热、焙烧和二次煅烧，得到预焙阳极；所述预热以15‑20℃/h升温至350‑400℃，并保温3‑6h；所述焙烧为以50‑65℃/h从室温升温至1150‑1170℃，并保温18‑26h；所述二次煅烧为以50‑65℃/h从室温升温至1500‑1600℃，并保温35‑45h。本发明的方法，通优化预焙阳极的配方和生产工艺，使得制备得到的预焙阳极各项指标均达到或优于标准。尤其是有效降低电解槽阳极掉渣量，确保电解槽平稳高效运行。
Preparation method of low-carbon-residue prebaked anode for aluminum electrolysis
铝电解用低炭渣预焙阳极制备方法
LIANG ZHENG (author) / LUO GAOQIANG (author) / WEI DEBIN (author) / HUANG HAIYAN (author) / LI YONGFENG (author) / LIANG RANZHANG (author) / HUANG BINGQIANG (author) / WEI LIANSHENG (author) / LI SIYUAN (author) / LIAO YUANZHANG (author)
2022-04-15
Patent
Electronic Resource
Chinese
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