2 naoh + (nh4)2so4 → 2 nh3 + na2so4 + 2 h2o

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Metallurgical solid waste residue contains a certain amount of Zn, which is an important secondary resource for the production of Zn. In this article, a hydrometallurgical method in a NH3–(NH4)2SO4–H2O system is proposed to lớn recover Zn selectively from metallurgical solid waste residue. The results showed the highest zinc extraction of 77.55% was obtained by using a total ammonia concentration of 5mol/L of the leaching agent, stirring tốc độ of 400rpm, ammonia/ammonium ratio (/+) of 1:1, solid/liquid ratio of 1:4, leaching time of 30min, & leaching temperature of 25°C.
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go back to lớn reference Ma AY, Zheng XM, Peng JH, Zhang LB, Srinivasakannan C (2017) Dechlorination of metallurgical solid waste residue derived from zinc leaching residue by microwave roasting in a rotary kiln. Braz J Chem Eng 34(1):193–202 CrossRef Ma AY, Zheng XM, Peng JH, Zhang LB, Srinivasakannan C (2017) Dechlorination of metallurgical solid waste residue derived from zinc leaching residue by microwave roasting in a rotary kiln. Braz J Chem Eng 34(1):193–202 CrossRef
go back to reference Chen WS, Shen YH, Tsai MS, Chang FC (2011) Removal of chloride from electric arc furnace dust. J Hazard Mater 190(1–3):344–639 Chen WS, Shen YH, Tsai MS, Chang FC (2011) Removal of chloride from electric arc furnace dust. J Hazard Mater 190(1–3):344–639


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go back to lớn reference Shawabkeh RA (2010) Hydrometallurgical extraction of zinc from Jordanian electric arc furnace dust. Hydrometallurgy 104(1):61–65 CrossRef Shawabkeh RA (2010) Hydrometallurgical extraction of zinc from Jordanian electric arc furnace dust. Hydrometallurgy 104(1):61–65 CrossRef
go back to lớn reference Havlík T, Souza BV, Bernardes AM, Schneider IAH, Miskufova A (2006) Hydrometallurgical processing of carbon steel EAF dust. J Hazard Mater 135(1):311–318 CrossRef Havlík T, Souza BV, Bernardes AM, Schneider IAH, Miskufova A (2006) Hydrometallurgical processing of carbon steel EAF dust. J Hazard Mater 135(1):311–318 CrossRef
go back khổng lồ reference Kukurugya F, Vindt T, Havlík T (2015) Behavior of zinc, iron & calcium from electric arc furnace (EAF) dust in hydrometallurgical processing in sulfuric acid solutions: thermodynamic & kinetic aspects. Hydrometallurgy 154:20–32 CrossRef Kukurugya F, Vindt T, Havlík T (2015) Behavior of zinc, iron & calcium from electric arc furnace (EAF) dust in hydrometallurgical processing in sulfuric acid solutions: thermodynamic và kinetic aspects. Hydrometallurgy 154:20–32 CrossRef
go back to reference Ma AY, Zheng XM, Li S, Wang YH, Zhu S (2018) Zinc recovery from metallurgical slag and dust by coordination leaching in NH 3–CH 3COONH 4–H 2O system. R. Soc. Xuất hiện sci. 5:180660 CrossRef Ma AY, Zheng XM, Li S, Wang YH, Zhu S (2018) Zinc recovery from metallurgical slag và dust by coordination leaching in NH 3–CH 3COONH 4–H 2O system. R. Soc. Open sci. 5:180660 CrossRef


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go back to reference Shun MS, Jin GK, Dong HY, Jeong SS, Tae HK (2008) Selective leaching of zinc from spent zinc-carbon battery with ammoniacal ammonium carbonate. Mater Trans 49(9):2124–2128 CrossRef Shun MS, Jin GK, Dong HY, Jeong SS, Tae HK (2008) Selective leaching of zinc from spent zinc-carbon battery with ammoniacal ammonium carbonate. Mater Trans 49(9):2124–2128 CrossRef
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