TY - THES

T1 - Hydrometallurgical Recovery of Zinc from Blast Furnace Sludge

AU - Iureva, Galina

N1 - no embargo

PY - 2023

Y1 - 2023

N2 - In light of the increasing need for recycling secondary sources of metals, one of the most pressing challenges is the extraction of zinc from blast furnace sludge (BFS). The sludge cannot be reintroduced into the blast furnace as it negatively affects the smelting process. Various methods of sludge processing were explored to reduce environmental impact regenerating components and recover valuable metals from the sludge. Thorough analyses of the sludge's mineralogical and chemical composition were conducted to determine the optimal method and leaching reagents for zinc recovery. The research demonstrated the effectiveness of hydrochloric acid leaching in achieving a high zinc recovery rate. The developed closed-loop circuit not only focuses on zinc recovery but also facilitates the recovery of the reagents used in the process. Implementing this circuit contributes to the development of a sustainable recycling system for blast furnace sludge, promoting efficient zinc recovery and reducing waste generation. The findings have implications for the iron and steel industry, fostering a more environmentally friendly and economically viable approach to waste management, resource recovery, and reagent utilization.

AB - In light of the increasing need for recycling secondary sources of metals, one of the most pressing challenges is the extraction of zinc from blast furnace sludge (BFS). The sludge cannot be reintroduced into the blast furnace as it negatively affects the smelting process. Various methods of sludge processing were explored to reduce environmental impact regenerating components and recover valuable metals from the sludge. Thorough analyses of the sludge's mineralogical and chemical composition were conducted to determine the optimal method and leaching reagents for zinc recovery. The research demonstrated the effectiveness of hydrochloric acid leaching in achieving a high zinc recovery rate. The developed closed-loop circuit not only focuses on zinc recovery but also facilitates the recovery of the reagents used in the process. Implementing this circuit contributes to the development of a sustainable recycling system for blast furnace sludge, promoting efficient zinc recovery and reducing waste generation. The findings have implications for the iron and steel industry, fostering a more environmentally friendly and economically viable approach to waste management, resource recovery, and reagent utilization.

KW - blast furnace sludge

KW - recycling

KW - zinc recovery

KW - hydrochloric acid leaching

KW - hydrometallurgical process

KW - blast furnace

KW - iron and steel industry

KW - industrial waste

KW - waste management

KW - waste treatment

KW - Hochofenschlamm

KW - Recycling

KW - Zinkrückgewinnung

KW - Auslaugung mit Salzsäure

KW - hydrometallurgischer Prozess

KW - Hochofen

KW - Eisen- und Stahlindustrie

KW - industrieller Abfall

KW - Abfallwirtschaft

KW - Abfallbehandlung

U2 - 10.34901/mul.pub.2023.214

DO - 10.34901/mul.pub.2023.214

M3 - Master's Thesis

ER -