Jul 18, 2013· Ferromanganese is one of the most important alloying elements in steel industries. In this work, the production of ferromanganese was carried out using three-phase submerged mini electric arc furnace. The effect of slag basicity due to the addition of a various amount of limestone as fluxing agent on this smelting process was investigated.
Jan 01, 2017· The effect of basicity on ferromanganese production from this beneficiated low-grade manganese ore had been investigated clearly in this experiment by using mini submerged arc furnace (SAF). Several basicities for 0.7 and 1.0, was used and it was controlled by the addition of limestone in this smelting process.
From this experiment, the optimum slag basicity was 0.8 that produced 8.2 kg of ferromanganese with 78.1% Mn, 12.7% Fe, and 8.9% Si. It resulted from 30 kg of manganese ore, 7.5 kg of cokes, and
A higher iron content results in a lower manganese content. Gangue contained in manganese ores becomes the main constituent of slag and affects the recovery of manganese. Silica increases MnO content in slag while CaO decreases it. Manganese ferroalloys are smelted in various grades.
A method of processing a ferroalloy waste slag in a reactor which includes the steps of treating the slag with a metallic reductant and a conditioning flux to release a metal oxide and reduce it to metallic form, to use as a commercially acceptable silicon-containing alloy and to form a waste slag which is detoxified by means of granulation and separating the detoxified slag from silicon
The effect of basicity of two different basic charges for reduction of MnO by solid carbon during smelting ferromanganese is considered. The effect of different charge compositions on MnO reduction in the temperature range 1400–1500°C is considered.
Apr 23, 2010· Daily average data obtained on the 1033 m 3 blast furnace No.3 of the Egyptian Iron and Steel Company (EISCO) were used to investigate the effects of BaO, basicity and temperature on the activity coefficient and activity of MnO in the slag as well as on the manganate capacity and manganese distribution between slag and metal. The activity coefficient was estimated by using the regular ionic
Further addition of CaF2 (>4%) produced a high basicity slag (basicity =0.83) having very high liquidus leading to decrease in metallic yield and Mn and Si recoveries. View full-text Conference...
It is well known that viscosity of liquid slag also de pends on temperature. The ef fect of temperature on the viscosity of ferromanganese slags is moderate in the temperature range from 1200 to 1500oC. As shown in Figure 9:, every 100oC increase in temperature brings on
The effect of basicity on ferromanganese production from this beneficiated low-grade manganese ore had been investigated clearly in this experiment by using mini submerged arc furnace (SAF). Several basicities for 0.7 and 1.0, was used and it was controlled by the addition of
Abstract: The reduction and liquidus behaviour of manganese slag with different basicities were studied in non-isothermal experiments in the temperature range of 1400–1500 C. Certain amounts of quartz were added to Assmang ore (South Africa), and lime was added to Comilog ore (Gabon), to adjust the charge basicity to 0.5, 0.8 and 1.2.
Slag chemistry applied in the AlloyStream process differs from that used in the production of high carbon ferromanganese in the submerged arc furnace. In process development of the AlloyStream process, several pilot plant and demonstration plant campaigns were completed.
Jun 19, 2018· The typical consumption figures per ton of low C Fe-Mn ferromanganese having composition of Mn 85 % to 92 %, C around 0.1 %, and Si around 1 % with a manganese recovery of 75 % are calcined Mn ore 1250 kg to 1350 kg, Si-Mn (containing 32 % to 33 % Si) 800 kg to 850 kg, quicklime 1000 kg to 1100 kg, electrodes 10 kg to 12
The effect of basicity of two different basic charges for reduction of MnO by solid carbon during smelting ferromanganese is considered. The effect of different charge compositions on MnO reduction in the temperature range 1400–1500°C is considered. Experiments are performed in a thermogravimetric furnace in the presence of CO at atmospheric pressure.
A method of processing a ferroalloy waste slag in a reactor which includes the steps of treating the slag with a metallic reductant and a conditioning flux to release a metal oxide and reduce it to metallic form, to use as a commercially acceptable silicon-containing alloy and to form a waste slag which is detoxified by means of granulation and separating the detoxified slag from silicon
Apr 23, 2010· Daily average data obtained on the 1033 m 3 blast furnace No.3 of the Egyptian Iron and Steel Company (EISCO) were used to investigate the effects of BaO, basicity and temperature on the activity coefficient and activity of MnO in the slag as well as on the manganate capacity and manganese distribution between slag and metal. The activity coefficient was estimated by using the regular ionic
The furnace charge includes high-manganese slag, siliceous manganese ore, or quartz in addition to manganese ores and fluxing agents. Because of the reduction of silica, the smelting temperature is higher than that of standard ferromanganese alloy. (c) Ferromanganese–silicon. Ferromanganese –silicon is also known as low-carbon
Silicomanganese alloy contains 65 to 68% manganese, 16 to 21% silicon, and 1.5 to 2% carbon, and is generated by the smelting of slag from manganese ore or high-carbon ferromanganese with a quartz flux and coke. The alloy’s carbon content is reduced due to the presence of silicon.
solubility of CrOx in the slag is about 60 mol%, if the slag is in equilibrium with metallic chromium. In this slag system, the slag is more acidic, the slag basicity is less than 1.0, and the effect of MgO and Al2O3 co-existence is incorporated. 3CrO Cr Cr O=+ 23 430 AUGUST 2004 The Journal of The South African Institute of Mining and Metallurgy
The effect of waste plastics addition on the reduction of Manganese (II) Oxide (MnO) from Silicomanganese (SiMn) slag by metallurgical coke (Coke) has been investigated through experiments conducted in a laboratory scale horizontal tube furnace coupled with off-gas analysis through an infrared (IR) gas analyser.
The reduction and liquidus behaviour of manganese slag with different basicities were studied in non-isothermal experiments in the temperature range of 1400–1500 °C. Certain amounts of quartz were added to Assmang ore (South Africa), and lime was added to Comilog ore (Gabon), to adjust the charge basicity to 0.5, 0.8 and 1.2. The extent of manganese ore reduction as a function temperature
Ferromanganese slag is a kind of blast furnace manganese slag from ferromanganese alloy smelting, a great amount of ferromanganese slag accounted for about 2−3 times as much as ferromanganese alloy each year [4,5]. The impurity categories included in ferro- manganese slag are the same as those of manganese ore, and the content of MnO is
Equilibrium between MnO-CaO-MgO-SiO2-Al2O3 slags and carbon saturated Mn-Si-Fe-C alloys was investigated under CO at 1500 o C. Manganese and silicon activities were obtained by using the present data and the previously determined MnO and SiO 2 activities of the slag. Quadratic multi-coefficient regression equations were developed for activity coefficients of manganese and silicon.