METHOD FOR RECOVERING ZINC FROM SUBSTANCES CONTAINING A ZINC CONPOUND

摘要

PURPOSE:To recover inexpensively and easily zinc with high concn. by sintering the briquettes consisting of a zinc compd. and carbonaceous material in a strong reducing atmosphere, metallizing and evaporating the zinc compd. and oxidizing the same in a strong oxidizing atmosphere. CONSTITUTION:A zinc-contg. dust raw material is charged into a kneading machine 1 and the concn. of the carbon and zinc contained is adjusted by a carbonaceous reducing agent and low zinciferous iron material. The raw material is briquetted by a briquetting machine 2 and further Ca compd. is coated thereon by a briquetting machine 3. The briquettes are charged into a laminar state between the sintering raw material 5 of a DL type sintering device and bedding ore 6. The top surface of a sintering raw material 5 is ignited by an ignition furnace 16 and the raw material is sintered by charged air 9 in the stage of moving in the sintering device. The zinc compd. subjected to reduction there is metallized and evaporated. The evaporated zinc is made into zinc oxide in the oxidizing gaseous flow and is separated from the other waste gas. Coarse particle dust is removed by a dust collector 12 and the zinc oxide is captured by a dust collector 13.