▎ 摘　　要

NOVELTY - Modified activated carbon comprises 15-25 wt.% sintering electric field dust removal ash, 15-25 wt.% converter dry dust removal coarse ash, 1-5 wt.% phosphoric acid, 25-50 wt.% activated carbon, 10-20 wt.% absolute ethanol, 5-10 wt.% water and 0.1-0.3 wt.% graphene, where the sintering electric field dust removal ash comprises iron/ferric oxide, silicon dioxide, calcium oxide, magnesium oxide, aluminum oxide, potassium and sodium, the converter dry dust removal coarse ash comprises ferrosoferric oxide, ferrous oxide, ferric oxide, silicon dioxide, calcium oxide, magnesium oxide, aluminum oxide, potassium, sodium, carbon and zinc, the phosphoric acid is analytically pure, the activated carbon is industrial pure, the absolute ethanol is analytically pure, the water is deionized water, and the graphene is industrial pure. USE - The modified activated carbon is useful in metallurgical solid waste resource utilization application. ADVANTAGE - The modified activated carbon has excellent flue gas desulfurization and denitration performance, expands the high-performance and high-value-added utilization path of sintering electric field dust removal ash and converter dry dust removal coarse ash, realizes the idea of using waste to treat waste, meets the relevant policy requirements of energy saving, and is economical and environmentally-friendly. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the modified activated carbon, involving (a) mechanically alloying sintering electric field dust removal ash under oxygen atmosphere using high-energy ball mill, and ball milling at a rotating speed of 300-600 rpm for 36-72 hours to obtain composite powder (I), (b) mixing obtained I-shaped composite powder with converter dry dust removal coarse ash, phosphoric acid and water, performing mechanical alloying treatment on I-shaped composite powder under air atmosphere using high-energy ball mill, and ball milling at a rotating speed of 250-400 rpm for 8-16 hours to obtain composite powder (II), (c) uniformly mixing composite powder (I) with activated carbon, absolute ethanol and graphene, performing mechanical alloying treatment on composite powder (II) under helium atmosphere using high-energy ball mill, and ball milling at a rotating speed of 300-600 rpm for 24-48 hours to obtain metallurgical dust modified activated carbon.