Abstract:The feasibility and regularity of dearsenication from cobalt-arsenic under vacuum have beeninvestigated on the self-made vacuum furnace.The influences of temperature,time,residualpressure,and pellet size on the envaporation ratio of arsenic have been tested with the fixed furnace configuration.The experimental results show that the process of dearsenication from cobalt-arsenic concentrate by vacuum distillation is effcctive.Under proper conditions,the envaporationratio of arsenic comes up to 89 %～95%.When the condcnsate experiences redistillation undervacuum.refined arsenic can be obtained which contains 99.7% arsenic.

Key words: vacuum distillation cobalt-arsenic concentratc condensate residue redistillation