scholarly journals Preparation of Direct Reduced Iron and Titanium Nitride from Panzhihua Titanomagnetite Concentrate Through Carbothermic Reduction-Magnetic Separation

Minerals ◽  
2017 ◽  
Vol 7 (11) ◽  
pp. 220 ◽  
Author(s):  
Wen Yu ◽  
Xiaojin Wen ◽  
Jiangan Chen ◽  
Jingzhong Kuang ◽  
Qiongyao Tang ◽  
...  
Keyword(s):  
Titanium Nitride ◽  
Magnetic Separation ◽  
Carbothermic Reduction ◽  
Direct Reduced Iron

scholarly journals Effect of Sodium Borate on the Preparation of TiN from Titanomagnetite Concentrates by Carbothermic Reduction–Magnetic Separation and Acid Leaching Process

Minerals ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 675 ◽  
Author(s):  
Wen Yu ◽  
Xiaojin Wen ◽  
Jiangan Chen ◽  
Qiongyao Tang ◽  
Wen Dong ◽  
...  
Keyword(s):  
Magnetic Separation ◽  
Carbothermic Reduction ◽  
Acid Leaching ◽  
Sodium Borate ◽  
X Ray Diffraction ◽  
Spectroscopy Analysis ◽  
Reduction Behavior ◽  
Direct Reduced Iron ◽  
Reduced Products ◽  
Spinel Mgal2o4

Carbothermic reduction–magnetic separation and acid leaching processes were used to produce TiN and direct reduced iron (DRI) from titanomagnetite concentrates. The effects of sodium borate on the reduction behavior of TMCs, the magnetic separation of the reduced products, and the purification of the impure TiN by acid leaching were investigated. Results of x-ray diffraction, scanning electron microscopy, and energy-dispersive spectroscopy analysis showed that magnesium aluminate spinel (MgAl2O4) was generated in the reduced products, which could hinder the purification of the TiN. Adding sodium borate not only inhibited the formation of MgAl2O4, but also promoted the formation of TiN by decreasing the roasting temperature and time. Adding sodium borate slightly affected the separation of metallic Fe and TiN. By adding 16% sodium borate, a DRI with 94.3% Fe, 0.6% Ti, and 0.1% V was obtained by magnetic separation. After HCl + HF leaching, the TiN product containing 74.1% Ti and 2.8% V was obtained with the Ti recovery of 94.6% and V recovery of 58.3%.

Studies on the Effects of Particle Size in Direct Reduction Roasting of Limonite Ores

2011 ◽  
Vol 402 ◽  
pp. 546-551 ◽  
Author(s):  
Jue Kou ◽  
Ti Chang Sun ◽  
Yong Li Li ◽  
Yun Ye Cao
Keyword(s):  
Particle Size ◽  
Magnetic Separation ◽  
Large Particle ◽  
Direct Reduction ◽  
Reduction Roasting ◽  
Large Particle Size ◽  
Direct Reduced Iron ◽  
Effect Of Particle Size ◽  
Separation Parameters ◽  
Roasting Time

A series of direct reduction roasting - magnetic separation tests were carried out with refractory limonite ore in two different particle size compositions. The effect of particle size in the grade and recovery of direct reduced iron (DRI) at different roasting time, temperature and reductant dosages was investigated, and the mineralogical transformations of DRI obtained at different roasting time were analyzed using scanning electron microscopy (SEM-EDS). The results demonstrate that direct reduction roasting with limonite ore in large particle size (100% －20mm) was feasible, and the reducibility of limonite ore in large particle size increased with increasing reductant dosage and roasting time. The optimum reduction roasting - magnetic separation parameters of 100%－20mm limonite ore were proposed as the following: roasting at 1200°C for 120min with 40% reductant, and milling 30min followed by low intensity magnetic separation, which resulted in the DRI with TFe grade of 90.2% and recovery of 89.3%.

Recovery of Iron from Cyanide Residues by Carbothermic Reduction-Magnetic Separation

2014 ◽  
Vol 692 ◽  
pp. 332-336 ◽  
Author(s):  
Liang Mou Yu
Keyword(s):  
Magnetic Separation ◽  
Steel Industry ◽  
Carbothermic Reduction ◽  
Industrial Wastes ◽  
Raw Material ◽  
Iron Recovery ◽  
Cyanide Leaching ◽  
Iron Concentrate ◽  
Chinese Steel Industry ◽  
Iron Bearing

A craft of carbothermic reduction-magnetic separation process is investigated for the recovery of iron from cyanide residues, a hazardous industrial wastes when produce gold with cyanide leaching method. The cyanide residues, containing 30.12% Fe was conducted for the craft. The results demonstrated that iron concentrate with 60.25% Fe and 79.85% of iron recovery was obtained under the optimal conditions (a reduction temperature of 950°C, a reduction duration of 60 min, a pulverized coal dosage of 10% and a potassium carbonate dosage of 4%).This craft can be used to utilize cyanide residues and produce qualified concentrate as iron-bearing feed for steel industry, which will help to solve the pollution of cyanide residues and extend raw material sourcing for Chinese steel industry.

scholarly journals Influence of Na2CO3 and K2CO3 Addition on Iron Grain Growth during Carbothermic Reduction of Red Mud

Metals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1313 ◽  
Author(s):  
Dmitry Zinoveev ◽  
Pavel Grudinsky ◽  
Andrey Zakunov ◽  
Artem Semenov ◽  
Maria Panova ◽  
...  
Keyword(s):  
Magnetic Separation ◽  
Grain Growth ◽  
Red Mud ◽  
Carbothermic Reduction ◽  
Reduction Roasting ◽  
Alumina Production ◽  
Iron Aluminum ◽  
Bauxite Ore ◽  
Hsc Chemistry ◽  
Sodium And Potassium

Red mud is a by-product of alumina production from bauxite ore by the Bayer method, which contains considerable amounts of valuable components such as iron, aluminum, titanium, and scandium. In this study, an approach was applied to extract iron, i.e., carbothermic reduction roasting of red mud with sodium and potassium carbonates followed by magnetic separation. The thermodynamic analysis of iron and iron-free components’ behavior during carbothermic reduction was carried out by HSC Chemistry 9.98 (Outotec, Pori, Finland) and FactSage 7.1 (Thermfact, Montreal, Canada; GTT-Technologies, Herzogenrath, Germany) software. The effects of the alkaline carbonates’ addition, as well as duration and temperature of roasting on the iron metallization degree, iron grains’ size, and magnetic separation process were investigated experimentally. The best conditions for the reduction roasting were found to be as follows: 22.01% of K2CO3 addition, 1250 °C, and 180 min of duration. As a generalization of the obtained data, the mechanism of alkaline carbonates’ influence on iron grain growth was proposed.

scholarly journals Preparation of Metallic Iron Powder from Pyrite Cinder by Carbothermic Reduction and Magnetic Separation

Metals ◽  
2016 ◽  
Vol 6 (4) ◽  
pp. 88 ◽  
Author(s):  
Hongming Long ◽  
Tiejun Chun ◽  
Zhanxia Di ◽  
Ping Wang ◽  
Qingmin Meng ◽  
...  
Keyword(s):  
Iron Powder ◽  
Magnetic Separation ◽  
Metallic Iron ◽  
Carbothermic Reduction ◽  
Pyrite Cinder
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