Method for separating antimony and bismuth from Kaldo furnace slag hydrochloric acid leachate

The invention discloses a method for separating antimony and bismuth from Kaldo furnace slag hydrochloric acid leachate. The method specifically includes: placing, by weight, 1 part of Kaldo furnace slag leachate and 0-1 part of water into a reduced pressure evaporation container, performing heating evaporation under a negative pressure condition, and recycling evaporated HCl and steam to obtain diluted hydrochloric acid; subjecting mother liquor after filtering and deacidification to cooling and filtering to obtain antimony oxychloride precipitates, and dissolving the antimony oxychloride precipitates in an ammonia water solution to obtain zero-level antimony oxide; using scrap iron to replace bismuth in the solution after antimony removing, regulating the HCl concentration of the replaced solution, and returning to the chlorination leaching procedure so as to achieved complete solution recycling and zero wastewater discharge. The method has the advantages that the method is simple, practicable, low in equip