An Innovative Process on Beneficiation of Superfine Low Grade Hematite Ore

2011 ◽  
pp. 307-318
Author(s):  
Deqing ZHU ◽  
Yongzhong XIAO ◽  
Tiejun CHUN ◽  
Jian PAN
Keyword(s):  
Low Grade ◽  
Innovative Process ◽  
Hematite Ore

Mineral Processing Technology Study on a Lean Hematite Ore with Finely-Disseminated Minerals

2013 ◽  
Vol 303-306 ◽  
pp. 2473-2476
Author(s):  
Wei Zhi Wang ◽  
Li Hui Zhou ◽  
Chun Guang Yang
Keyword(s):  
Mineral Processing ◽  
Low Grade ◽  
Iron Recovery ◽  
Technology Study ◽  
Complex Composition ◽  
Flotation Process ◽  
Iron Concentrate ◽  
Second Stage ◽  
Fine Grain ◽  
Hematite Ore

The mineral processing experimental research was carried out on the hematite bearing characteristics of low grade, fine grain,complex composition. The results showed that using the technological flowsheet of “stage grinding- low intensity magnetic separation”, the iron concentrate with recovery of 36.56% and grade of 65.85% Fe can be obtained. And the iron concentrate with recovery of 17.23% and grade of 63.53% Fe can be obtained by “stage grinding-HIMS process-reverse flotation” process. The final iron concentrate with TFe grade of 65.10%,yield of 19.19% and total iron recovery of 53.79% from the raw ores with TFe grade of 23.41％ was obtained, with the first stage grinding size being 55% -0.074mm and the second stage,93% -0.074mm.

Research on Improving the Classification-Gravity Concentration Technology Based on an Anshan-Type Low-Grade Hematite Ore

2012 ◽  
Vol 454 ◽  
pp. 256-260 ◽  
Author(s):  
Bao Yu Cui ◽  
De Zhou Wei ◽  
Rui Yang Zhang ◽  
Si Yao Zhang
Keyword(s):  
Size Distribution ◽  
Magnetic Separation ◽  
Low Grade ◽  
Flow Sheet ◽  
Gravity Concentration ◽  
Mineralogical Characteristics ◽  
Hematite Ore ◽  
Iron Grade

The beneficiation of Anshan-type low-grade hematite ores attracts more and more attention. Complicated beneficiation flow sheets are necessary to deal this type of ores. Classification-gravity concentration technology is used widely in these flow sheets because of its characteristics. In this paper, grinding characteristics and classification-gravity concentration tests were carried out based on the ore’s mineralogical characteristics. When the ground size of the ore was 75% -0.071mm, through beneficiation by the flow sheet of classification-gravity concentration-middle intensity magnetic separation discarding, a satisfactory concentrate assaying 67.58% Fe, 47.51% recovery was obtained, and the iron grade and yield of the tailings were 5.93% and 39.77% respectively. The controlling of the size distribution and the behavior of finer hematite grains is important and efficiency in beneficiation of Anshan-type hematite ores.

Separating the Anshan-Type Low-Grade Hematite Ore with Process of Gravity-Magnetic Method

2013 ◽  
Vol 303-306 ◽  
pp. 2541-2544 ◽  
Author(s):  
Qing Mei Jia ◽  
Feng Jiu Li ◽  
Ying Li
Keyword(s):  
Magnetic Separation ◽  
High Intensity ◽  
Magnetic Method ◽  
Low Grade ◽  
Hematite Ore ◽  
Ore Grade

According to the nature of the ore which containing hematite and magnetite,under the conditions,for example,ore grade is 24.07%,the first fineness of grinding -200 mesh is 50%，the second fineness of grinding -200 mesh is more than 95%, it is concluded that concentrating circuit consisting of first grind-Feebleness magnetic separation -high intensity magnetic separation，second grind-second-high intensity magnetic separation-shaking tables. Ultimately, A concentrate with a productivity of 19.35%，a grade of 65.89% TFe and the recovery of 52.32%was yielded.

Research on mineral processing for high silica low grade hematite ore in Xinjiang

2014 ◽  
Vol 41 (7) ◽  
pp. 481-485 ◽  
Author(s):  
C.-S. Liu ◽  
J.-S. Li ◽  
H.-Y. Tang ◽  
Y.-W. Gao
Keyword(s):  
Mineral Processing ◽  
Low Grade ◽  
High Silica ◽  
Hematite Ore

Separate the Anshan-Type Low-Grade Hematite Ore With Process of Low-High Intensity Magnetic Separation and Reverse Flotation Method

2013 ◽  
Vol 690-693 ◽  
pp. 3517-3520
Author(s):  
Qing Mei Jia ◽  
Feng Jiu Li ◽  
Ying Li
Keyword(s):  
Magnetic Separation ◽  
High Intensity ◽  
Low Grade ◽  
Reverse Flotation ◽  
Flotation Method ◽  
Hematite Ore ◽  
Nature Ofthe ◽  
Ore Grade

According to the nature ofthe ore which containing hematite and magnetite,under the conditions,forexample,ore grade is 24.07%,the fitst fineness of grinding -200 mesh is 50%，thesecond fineness of grinding -200 mesh ismore than 93%, it is concluded that concentrating circuit consisting of firstgrind-Feebleness magnetic separation -high intensity magnetic separation，secondgrind-second-high intensity magnetic separation- reverse flotation .Ultimately, A concentrate with aproductivity of 18.90%，a grade of 65.21% TFe and the recovery of 51.29% was yielded.

Fragmentation mechanism of low-grade hematite ore in a high pressure grinding roll

2016 ◽  
Vol 23 (11) ◽  
pp. 2838-2844 ◽  
Author(s):  
Zhi-tao Yuan ◽  
Li-xia Li ◽  
Yue-xin Han ◽  
Lei Liu ◽  
Ting Liu
Keyword(s):  
High Pressure ◽  
Low Grade ◽  
Fragmentation Mechanism ◽  
High Pressure Grinding Roll ◽  
Hematite Ore

scholarly journals Genesis of Langrial Iron Ore of Hazara area, Khyber Pakhtunkhwa, Pakistan

2021 ◽  
Vol 4 (2) ◽  
Author(s):  
Naghmah Haider ◽  
Sajjad Khan ◽  
Rehanul Haq Siddiqui ◽  
Shahid Iqbal ◽  
Nazar UI-Haq
Keyword(s):  
Iron Ore ◽  
High Energy ◽  
Low Grade ◽  
X Ray Diffraction ◽  
Humid Climate ◽  
X Ray ◽  
High Silica ◽  
Hematite Ore ◽  
Depositional Setting ◽  
Ore Grade

In this paper, a detailed mineralogical and genesis investigation have been carried out in the seven locations of the Iron Ore in Hazara area. Thick bedded iron ore have been observed between Kawagarh Formation and Hangu Formation i.e, Cretaceous-Paleocene boundary. At the base of Hangu Formation, variable thickness of these lateritic beds spread throughout the Hazara and Kohat-Potwar plateau. This hematite ore exists in the form of unconformity. X-ray diffraction technique (XRD), X-ray fluorescence spectrometry (XRF), detailed petroghraphic study and scanning electron microscope (SEM) techniques indicated that those iron bears minerals including hematite, chamosite and quartz, albite, clinochlore, illite-montmorillonite, kaolinite, calcite, dolomite, whereas ankerite are the impurities present in these beds. The X-ray fluorescence (XRF) results show that the total Fe2O3 ranges from 39 to 56%, with high silica and alumina ratio of less than one. Beneficiation requires for significant increase in ore grade. The petroghraphic study revealed the presence of ooids fragments as nuclei of other ooids with limited clastic supply, which indicate high energy shallow marine depositional setting under warm and humid climate. The overall results show that Langrial Iron Ore is a low-grade iron ore which can be upgraded up to 62% by applying modern mining techniques so as to fulfill steel requirements of the country.

Beneficiation Process Optimization Study on a Low-Grade Hematite Ore

2013 ◽  
Vol 303-306 ◽  
pp. 2461-2464
Author(s):  
Wei Zhi Wang ◽  
Qing Mei Jia ◽  
Chun Guang Yang
Keyword(s):  
Process Optimization ◽  
High Intensity ◽  
Iron Ore ◽  
Low Grade ◽  
Iron Recovery ◽  
Magnetic Separator ◽  
Iron Concentrate ◽  
Second Stage ◽  
Optimization Study ◽  
Hematite Ore

A hematite has low grade, fine disseminated size andcomplex disseminated relations, which are refractory iron ore. Using SLon pulsating high gradient magnetic separator, induction intensity 8500Oe, pulsating 20mm stroke, stroke of 120 beats / min), a crude iron ore concentrates a grade of 35.93.%, the recovery rate of 82.39% is obtained through high intensity magnetic separation.( The final iron concentrate with TFe grade of 64.83%,yield of 14.55% and iron recovery of 35.74% from the raw ores with TFe grade of 26.29％ was obtained, with the first stage grinding size being 50% -0.074mm and the second stage,95% -0.074mm.

scholarly journals Hydrogen Reduction of Hematite Ore Fines to Magnetite Ore Fines at Low Temperatures

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Wenguang Du ◽  
Song Yang ◽  
Feng Pan ◽  
Ju Shangguan ◽  
Jie Lu ◽  
...  
Keyword(s):  
Hydrogen Reduction ◽  
Fixed Bed ◽  
Coke Oven ◽  
Product Layer ◽  
Total Iron ◽  
Fixed Bed Reactor ◽  
Low Grade ◽  
Iron Recovery ◽  
Magnetite Ore ◽  
Hematite Ore

Surplus coke oven gases (COGs) and low grade hematite ores are abundant in Shanxi, China. Our group proposes a new process that could simultaneously enrich CH4from COG and produce separated magnetite from low grade hematite. In this work, low-temperature hydrogen reduction of hematite ore fines was performed in a fixed-bed reactor with a stirring apparatus, and a laboratory Davis magnetic tube was used for the magnetic separation of the resulting magnetite ore fines. The properties of the raw hematite ore, reduced products, and magnetic concentrate were analyzed and characterized by a chemical analysis method, X-ray diffraction, optical microscopy, and scanning electron microscopy. The experimental results indicated that, at temperatures lower than 400°C, the rate of reduction of the hematite ore fines was controlled by the interfacial reaction on the core surface. However, at temperatures higher than 450°C, the reaction was controlled by product layer diffusion. With increasing reduction temperature, the average utilization of hydrogen initially increased and tended to a constant value thereafter. The conversion of Fe2O3in the hematite ore played an important role in the total iron recovery and grade of the concentrate. The grade of the concentrate decreased, whereas the total iron recovery increased with the increasing Fe2O3conversion.

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