Green magnetization roasting technology for refractory iron ore using siderite as a reductant J Clean Prod, 206 ( 2019 ), pp. 40 - 50 View PDF View article Crossref View in …
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An iron concentrate (iron grade: 65.92wt%, iron recovery: 98.54wt%) was obtained by magnetic separation under the optimum SMR conditions: siderite dosage 40wt%, roasting temperature 700°C, roast ...
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In this work, the beneficiation of siderite fines containing high levels of carbonates was studied using a combined fluidized-bed magnetizing roasting process. The siderite was almost completely ...
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The changes of chemical compositions with sample bed (coal + siderite) temperature in function of roasting time are given in Figure 3. Temperature of the mixture bed …
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As shown by the experience of the roasting-and-dressing factory at the Bakal ore group for oxidative roasting of siderite ores in shaft furnaces, 15 to 17% of Fe 2 O 3 ores …
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Magnetization roasting technology is a novel pre-treatment method to change the properties of ores, especially iron ore [[10], [11], [12], [13]].In this process, the weakly magnetic …
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Magnetization roasting in a reducing atmosphere provides mainly magnetite as the roasted ore, and increased CO content can efficiently promote this effect. At 700–780 °C and when the CO content was increased to more …
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In this study, a thermal analysis–infrared (IR) analysis–in-situ IR method was used to investigate the reaction mechanism and kinetics of Daxigou siderite. Experiments were conducted using a conveyor bed magnetization …
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In this regard, Zhang et al. (Zhang et al., 2020, Zhang et al., 2022) conducted a targeted study and found that when the roasting temperature was between 600 ∼ 800 ℃ and …
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In the present study, a green magnetization roasting process was proposed by using siderite (FeCO 3) as the reductant.The influences of the siderite dosage, roasting temperature …
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Realizing the large-scale development and utilization of siderite, a difficult iron ore reserve, has great practical significance in ensuring the supply of iron ore resources. Therefore, a new in-house conveyor bed magnetization …
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2.2 Methods. The mechanism of the synergistic effect of CO–H 2 in improving the magnetizing roasting of siderite–hematite mixed iron ore was determined from experiments …
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Siderite roasting, also known as the thermal decomposition of siderite, is a complex process involving multistep reactions. Therefore, the reaction characteristics and mechanisms …
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Reaction behavior and non-isothermal kinetics of suspension magnetization roasting of limonite and siderite, Int., Strengthening iron enrichment and dephosphorization of …
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Iron recovery rate of siderite is greatly improved 34% by proposed roasting process. Siderite is an important iron ore resource. The magnetization roasting is one of the most …
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Magnetization roasting is one of the most effective way of utilizing low-grade refractory iron ore. However, the reduction roasting of siderite (FeCO 3) generates weakly …
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In this paper, we calculated the kinetic parameters, and revealed the mechanisms of magnetization roasting of siderite ore by XRD and SEM-EDS. The siderite ore used in this …
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In order to develop limonite and decrease CO2 emissions, siderite is proposed as a clean reductant for suspension magnetization roasting (SMR) of limonite. An iron concentrate …
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Whether magnetization roasting requires complete phase reconstruction of iron minerals: A study of phase transition and microstructure evolution. ... The weakly magnetic …
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Magnetization roasting at 750–780 °C for approximately 3.5 s in the CBMRP results in a magnetic conversion rate of >0.99% of the iron minerals in the siderite.
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However, a high roasting temperature could accelerate the transformation of hematite and siderite to magnetite, and the magnetite thus formed could be over-reduced by …
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Siderite is roasted by microwave heating with different holding times at 800 °C. Roasting products are employed as catalyst to investigate the catalytic combustion effects on …
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The roasting of siderite ores in shaft furnaces is characterized by significant nonuniformity of the temperature and velocity fields at all levels of the charge. Heat exchange …
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Abstract Siderite ores of the Bakalskoe deposit contain iron, magnesium and manganese carbonates. Since the content of manganese in the ore is insignificant, its effect of …
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This paper investigated the influence of temperature, time, and other parameters on the magnetic properties of roasted siderite ores using the method of suspended roasting and analyzed the washability of roasted ores …
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Magnetization roasting is one of the most effective way of utilizing low-grade refractory iron ore. However, the reduction roasting of siderite (FeCO3) generates weakly …
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Partial magnetization of siderite can be achieved in a short time by fluidization roasting with low energy consumption for efficient iron recovery.
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The regulatory mechanisms of the main factors (siderite dosage, roasting temperature, and roasting time) on the self-magnetization roasting process were investigated. …
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The use of siderite as a green and clean reductant for the suspension magnetization roasting of refractory iron ores was proposed. In this study, the behavior of …
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a mass ratio of siderite to hematite of 80:20 roasted at 850°C. for 20 min, an iron concentrate assaying 61.6% Fe with. a recovery of 91.1% was produced after magnetic …
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