Abstract:At present, the continuous pressure leaching process of horizontal reactor is mostly used in zinc hydrometallurgy, cobalt hydrometallurgy and other industries. The pressure leaching process of vertical reactor is more advanced in the wet arsenic production field. There is no horizontal reactor continuous pressure leaching applied in the field of wet arsenic production. Therefore, Guixi Smelter has studied the application of horizontal reactor continuous pressure leaching in wet arsenic production by experiment, studied the parameters such as liquid inlet volume and air volume, and found out the best process conditions. The new process of horizontal reactor has been successfully applied to wet arsenic production, which is of great popularization value.