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高温法是目前国内处理铝电解废阴极的主要研究方向。系统研究了焙烧温度、焙烧时间、样品粒度等对氰化物、氟化物及其它元素脱除效率的作用规律，研究了石墨碎石墨化度、真密度、粉末电阻率与焙烧温度的关系。研究表明，在600℃焙烧时氰化物可以完全分解，在1 000℃以上可以脱除氟及其其它成分(不含碳),氟及其它成分的脱除率主要和焙烧温度有关，焙烧温度越高，氟及其它成分的脱除率越高；石墨碎的石墨化度和真密度随焙烧温度的升高而提高，焙烧温度达到2 600℃时石墨碎的石墨化度达到98.4%、真密度达到2.270 3 g/cm3;石墨碎的粉末电阻率随焙烧温度的升高而降低；焙烧所得石墨碎具有较高的应用价值。
Abstract：High temperature treatment method is the main research direction in treating spent cathode of aluminum electrolysis.The effects of calcination temperature, calcination time and particle size of sample on removal efficiency of cyanide, fluoride and other elements were studied, and the relationship between degree of graphitization, true density, powder resistivity and calcination temperature were investigated.The results show that cyanide can be completely decomposed by roasting at 600 ℃,fluorine and other components(without carbon) can be removed by roasting at 1 000 ℃ above.The removal rate of fluorine and other components rises with the increase of calcination temperature.The graphitization degree and true density of graphite fragments rises with the increase of calcination temperature.When the calcination temperature reaches 2 600 ℃,the graphitization degree and true density of graphite fragments reach 98.4% and 2.270 3 g/cm3 respectively.The resistivity of graphite powder drops with the increase of calcination temperature.The calcinated graphite grains are of high application value.
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基本信息:
中图分类号:X758;TQ127.11
引用信息:
[1]申士富,刘朋,王金玲,等.高温法处理铝电解废阴极的机理[J].有色金属(冶炼部分),2023(03):61-67.
基金信息:
2019年度山东省重大科技创新工程项目(2019JZZY010413); 国家重点研发计划项目(2018YFC1901901)
2023-02-28
2023-02-28