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.
go back to lớn reference Trinkel V, Mallow O, Aschenbrenner P, Rechberger H, Fellner J (2016) Characterization of blast furnace sludge with respect lớn heavy metal distribution. Ind Eng Chem Res 55:5590–5597 CrossRef Trinkel V, Mallow O, Aschenbrenner P, Rechberger H, Fellner J (2016) Characterization of blast furnace sludge with respect lớn heavy metal distribution. Ind Eng Chem Res 55:5590–5597 CrossRef
go back khổng lồ reference Das B, Prakash S, Reddy PSR, Misra việt nam (2007) An overview of utilization of slag and sludge from steel industries. Resour Conserv Recycl 50:40–57 CrossRef Das B, Prakash S, Reddy PSR, Misra toàn quốc (2007) An overview of utilization of slag and sludge from steel industries. Resour Conserv Recycl 50:40–57 CrossRef
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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