Silicomanganese production from manganese rich slag

Abstract

Manganese rich slag produced by the appropriate treatment of high manganese pig iron has a high manganese content and results in low fines, is low cost and gives low excess oxygen. Manganese recovery from this slag in the form of manganese ferroalloys compensates for the excess cost of the treatment process. Manganese rich slags produced from the injection of high manganese pig iron under at optimum conditions have levels of (Mn).35 wt-%, (Mn)/(Fe).7 . 65, (Mn)/(Si).2 and (Mn)/(P).285, which satisfy requirements for use as raw material in silicomanganese alloy production. Various experiments were carried out to smelt high manganese slag resulting from the treatment of high manganese pig iron to produce silicomanganese in a bench scale submerged electric arc furnace. Use of such manganese rich slag in the proportion of 40% of the blend has been found to be optimum to obtain a silicomanganese alloy with the highest metallic yield and highest manganese recovery. The silicomanganese alloy produced satisfies the standard chemical specifications, with manganese and silicon contents 68 and 18%, respectively.

Manganese Nodules Residue: Potential Raw Material for FeSiMn Production

“…Although, the use of Mn/Fe ratio >4 for the silicomanganese production from smelting of Mn ore-FeMn slag/Mn rich slag have been reported in the literature [9,10], in the present studies, the minimum Mn/Fe ratio required for the silicomanganese production using leached manganese nodule residue and Mn ore is 3.5 (residue to Mn ore = 1:0.6) on both the basicity.…”

Manganese Ores from South Sulawesi: Their Potential Uses as Raw Materials for Metallurgical Industry

“…Other elements present in the ores have also effect on the production of silicomanganese. Basicity (CaO + MgO)/(Al 2 O 3 ) of the Bone sample is 1.2 which is closed to the optimum value of 1.8 [9].…”

“…Therefore the higher CaO/MgO ratio may result in higher metallic yield and manganese recovery. The presence of MgO is also favorable for silicon reduction [9]. Despite manganese ores from both areas can be potentially used as raw materials in ferromanganese and ferrosilicone productions.…”

Cold Simulation of Metalloids Transport in Blast Furnaces

“…Molten slags produced during metal extraction generally exhibit a network structure of oxides of various elements. Crystallographically, each oxygen atom is bonded to various atoms of these elements in a three-dimensional network [1][2][3]. It can generally be referred to the weakly ordered regions within the slag volume.…”