Extraction process of iron mine sintered smoke dust valuable elements

The invention discloses an extraction process of iron mine sintered smoke dust valuable elements. The process comprises the following steps: a, adding water to titanium dioxide waste acid to prepare an acid solution, and then adding sodium dodecyl sulfate and iron mine sintered smoke dust to perform leaching to obtain lead skim and leaching liquor; b, extracting the leaching liquor to obtain a copper-containing extracted organic phase and raffinate aqueous solution; c, adding sodium bromide to obtain silver bromide sediment and a filtrate; d, washing and drying the silver bromide sediment to obtain a silver bromide product; e, adding sodium carbonate, activated carbon and polysilicate ferric aluminum to the filtrate to obtain a colorless and transparent filtrate; f, adding sodium chlorate, and filtering to obtain a potassium chlorate product; adding the filtrate into the colorless and transparent filtrate obtained in the step e to use; g, when the mass concentration of sodium in the filtrate obtained through filtering and separating in the step f is greater than 280g/L, evaporating, concentrating and crystallizing to obtain an industrial sodium chloride product. The process disclosed by the invention is capable of effectively extracting potassium, copper and silver, and has good social benefit and economic benefit.