E3S Web Conf.
Volume 126, 2019International Conference on Modern Trends in Manufacturing Technologies and Equipment (ICMTMTE 2019)
|Number of page(s)||5|
|Published online||30 October 2019|
The iron-containing electric-furnace steelmaking waste: physical and chemical properties and acidic modification
Belgorod State Tecnological University named after V. G. Shukhov,
46 Kostyukova st.,
2 Kazan National Research Technological University, 68 Karl Marx st., 420015, Russia
* Corresponding author: email@example.com
The electric furnace steelmaking dust is formed at melting metalized pellets in electric-arc steel-making furnaces and is a largetonnage waste. It contains such elements as Fe, Mg, Al, C, Si, Zn, Mn, Na. The ferrous and ferric iron compounds in the EFS dust are mostly presented with oxides — the compounds, which are poorly soluble in aqueous media and can’t take part in exchange reactions under ordinary conditions. The acid treatment with HCl allows obtaining a coagulating suspension, which can be usedfor wastewater treatment. Besides, there was detected up to 14 % of CaO, both free and in calcium silicates such as CaSiO3 and Ca2SiO4. So, in the process of treatment with EFS dust the formation of polysilicic acids helps increasing the purification efficiency.
© The Authors, published by EDP Sciences, 2019
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