Abstract: The coarse arsenic fume is an inevitable product of the gold roasting and smelting process in the treatment of complex arsenic-containing gold concentrate.The way it is effectively disposed of safely,environmentally friendly,and recovered as resources,has become a technical problem for the gold and non-ferrous metal smelting industry.In the production process of a gold smelting company,the mass fractions of arsenic trioxide,gold,and silver in the coarse arsenic fume are 86.50 %,1.1 g/t,and 11 g/t,respectively.The coarse arsenic fume is treated using closed fluidization transportation of coarse arsenic fume,multi-stage gradient temperature-controlled distillation,multi-stage slow-cooling crystallization of arsenic,leaching of gold and silver from arsenic-removal slag and recycling of arsenic-removal tail gas.This technology has been successfully applied on an industrial scale.The primary product obtained has an arsenic trioxide mass fraction of 99.51 %,and the arsenic recovery rate reaches 99.10 %.The gold and silver recovery rates are 81.17 % and 79.94 % respectively.The industrial application of the purification and production of arsenic trioxide from coarse arsenic fume successfully transforms coarse arsenic fume hazardous waste into a secondary high-value resource,overcoming the technical bottlenecks of producing high-purity arsenic trioxide from coarse arsenic fume both domestically and internationally.The comprehensive recovery,recycling,and clean production of coarse arsenic fume resources have significant environmental,economic,and social benefits,demonstrating wide-ranging value for promotion and application.