Abstract

 
 
 The industrial sites of the smelters of the Ural Mining and Metallurgical Company have accumulated a lot of anthropogenic waste, the processing of which is currently economically impractical. These primarily include tailings and beneficiation tailings, as well as waste granulated and copper smelting slag. This article conducts studies on technologies for x-ray-radiometric/magnetic separation enrichment of discard slags of MMSK as well as using jigging machines. Slag and slag enrichment tailings are used for cement production and road construction. For complex processing of fine copper smelting dusts OJSC Chelyabinsk zinc plant developed, tested and implemented a special technology. After implementation of ”Actions to process industrial waste generated by UMMC enterprises at metallurgical enterprises of UMMC-Holding Corp.”, the following were noted: concentrators and special beneficiation facilities process slag; R&D on complete processing of concentrator’s tailings was conducted; smelting dust was not stored but processed in full; the technology of implementing Waelz process for processing of steel smelting dust has been developed and commercially tested; the technology for extraction of copper and precious metals from pyrite dross is to be improved.
 
 
 
 Keywords: anthropogenic waste, dust, tailings, slag, pyrite dross
 
 
 
 
 
Highlights
The industrial sites of the smelters of the Ural Mining and Metallurgical Company have accumulated a lot of anthropogenic waste, the processing of which is currently economically impractical
The amount of waste and metals in them accumulated by UMMC enterprises as of the beginning of the implementation of the ”Actions to process industrial waste generated by UMMC enterprises at metallurgical enterprises of UMMC-Holding Corp.” is given in the Table 1
Slag and slag enrichment tailings are used for cement production and road construction
Summary
Dust delivered to OJSC “Chelyabinsk zinc plant” in big-bags was briquetted with subsequent processing with other zinc-containing materials and coke fines in Waelz furnaces of L=60 m and D=4.0 m, where zinc, lead and cadmium are recovered and fumed in the gas phase. The Cl and F content in the oxide reaches 1.5%, and 0.5% respectively and they are removed in the form of chlorides, zinc fluorides and lead before further hydrometallurgical processing by Waelz oxide calcination at 600 – 1100∘C in tubular rotary kilns of L=40 m and D=2.5 m. The yield of carbonized cake containing Pb > 45% and Zn < 5.0% accounts for 18 – 20% of the Waelz oxide and it serves as feed for crude and ingot lead production in short-drum furnaces and refining kettles at “Non-ferrous Alloys Production”, branch of OJSC ”Uralelektromed”
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