Experimental Study on Magnetic Separation of Oolitic Hematite Ore

2013 ◽  
Vol 834-836 ◽  
pp. 374-377
Author(s):  
Qing Liu ◽  
Le Le Zhong ◽  
Wen Qi Gong ◽  
En Wen Wang ◽  
Yu Lu ◽  
...  
Keyword(s):  
Magnetic Separation ◽  
Separation Processes ◽  
Optimal Experiment ◽  
Use Of Resources ◽  
Hematite Ore ◽  
Effective Use ◽  
Iron Grade ◽  
Oolitic Hematite Ore ◽  
The Magnetic Field ◽  
Iron Ore Concentrate

To enhance effective use of resources, we use magnetic separation method on the experiment study of a refractory oolitic hematite ore. Research showed that: the grade of raw ore (TFe) was 47.44%, and magnetic iron grade (MFe) was 28.59%. Through magnetic separation experiment, three-step magnetic separation process was chosen. The magnetic field intensity (MFI) of three magnetic separation processes was 1200Oe800Oe400Oe, respectively. After first magnetic separation, the preliminary concentrates was reground to fineness of 87% (-500 mesh). Under the optimal experiment conditions, an iron ore concentrate with grade of 61.11% and a good recovery of 44.35% was obtained.

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.

Test Research on HIMS-Reverse Flotation of Oolitic Hematite of Longyan Iron Mine

2013 ◽  
Vol 753-755 ◽  
pp. 24-27 ◽  
Author(s):  
Shu Xian Liu ◽  
Jin Xia Zhang ◽  
Miao Chen ◽  
Zhi Shuai Xu
Keyword(s):  
Magnetic Separation ◽  
Reverse Flotation ◽  
Test Results ◽  
Flotation Reagents ◽  
High Gradient Magnetic Separation ◽  
Iron Concentrate ◽  
Iron Mine ◽  
Hematite Ore ◽  
Reverse Floatation ◽  
Oolitic Hematite Ore

In order to better exploit and utilize the oolitic hematite ore resource in Zhangjiakou region, staged grinding-separation process consisting of high intensity magnetic separation(HIMS) and reverse floatation was adopted in the beneficiation test on the regionally representative oolitic hematite ore of Longyan Iron Mine, Xuan Stee1. The test results indicate that，with Slong pulsating high gradient magnetic separation as HIMS equipment，with NaOH，starch，CaO and TS as flotation reagents，and at a grind of 65％ -200 mesh for the primary grinding and 95％-200 mesh for the secondary grinding，an iron concentrate grading 62.34％ and having an iron recovery of 53.07％ can be achieved after two stage HIMS and one roughing—one cleaning reverse flotation.

Research on Classified Magnetic Separation of Oolitic Hematite from Guizhou Province

2013 ◽  
Vol 634-638 ◽  
pp. 3433-3436
Author(s):  
Wen Hui Chen ◽  
Qin Zhang ◽  
Zhi Hui Shen ◽  
Mao Jiang
Keyword(s):  
Magnetic Separation ◽  
Size Fraction ◽  
Guizhou Province ◽  
Iron Recovery ◽  
Low Intensity ◽  
The World ◽  
Refractory Ores ◽  
Hematite Ore ◽  
Oolitic Hematite Ore

Oolitic hematite is considered to be one of the most refractory ores in the world due to its ultra fine disseminated grain size and complex mineral composition. Various magnetic separation methods were conducted on the oolitic hematite ore samples from Guizhou Province. Because the TFe grades of each size fraction of the grinding products were different from each other, the beneficiation process of “classification – low intensity magnetic separation – high intensity magnetic separation” was finally adopted to guarantee the quality of iron concentrates. After the determined magnetic separation, the relatively good technical indexes are obtained. The TFe grade of iron concentrates is increased from 38.7% to 46.1%, and the iron recovery is 81.7%.

scholarly journals Effect of Coal Type on the Reduction and Magnetic Separation of a High-phosphorus Oolitic Hematite Ore

2015 ◽  
Vol 55 (3) ◽  
pp. 536-543 ◽  
Author(s):  
Wen Yu ◽  
Tichang Sun ◽  
Qiang Cui ◽  
Chengyan Xu ◽  
Jue Kou
Keyword(s):  
Magnetic Separation ◽  
High Phosphorus ◽  
Hematite Ore ◽  
Oolitic Hematite Ore ◽  
Coal Type

Industry Test on Phosphorus Removal and Direct Reduction of High-Phosphorus Oolitic Hematite Ore

2011 ◽  
Vol 402 ◽  
pp. 535-541 ◽  
Author(s):  
Yong Li Li ◽  
Ti Chang Sun ◽  
Jue Kou ◽  
Cheng Yan Xu ◽  
Zhan Hua Liu ◽  
...  
Keyword(s):  
Metallic Iron ◽  
Phosphorus Removal ◽  
Phosphorus Content ◽  
Direct Reduction ◽  
Reduction Roasting ◽  
X Ray ◽  
High Phosphorus ◽  
Hematite Ore ◽  
Iron Grade ◽  
Oolitic Hematite Ore

Industry test on phosphorus removal and direct reduction of the “Ningxiang type” high-phosphorus oolitic hematite ore has been carried out in a tunnel kiln on the basis of laboratory experiment. The iron grade and phosphorus content of the initial sample are 42.46% and 0.867%, respectively. The results showed that high-phosphorus oolitic hematite could be exploited on industrial scale, with the new process direct reduction roasting – grinding – magnetic separation, and that the final concentrate with an iron grade 92.56%, iron recovery 82.77% and phosphorus content 0.089% was obtained under the optimal conditions. Besides, X-ray diffraction (XRD) and scanning electron microscope with X-ray energy dispersive spectrum (SEM-EDS) were used to analysis the mechanism of phosphorus removal and direct reduction. It was shown that oolitic structure was destroyed, and metallic iron particle coarsening was obvious, besides fluorapatite particles were dispersed in the gangue by diffusion during the reduction roasting process. The liberation of metallic iron and gangue can be achieved by grinding, so high iron grade and low phosphorus content concentrate can be obtained after magnetic separation.

scholarly journals Increasing Iron and Reducing Phosphorus Grades of Magnetic-Roasted High-Phosphorus Oolitic Iron Ore by Low-Intensity Magnetic Separation–Reverse Flotation

Processes ◽  
2019 ◽  
Vol 7 (6) ◽  
pp. 388 ◽  
Author(s):  
Xiao ◽  
Zhou
Keyword(s):  
Magnetic Separation ◽  
Iron Ore ◽  
Phosphorus Content ◽  
Reverse Flotation ◽  
Low Intensity ◽  
High Phosphorus ◽  
Oolitic Iron Ore ◽  
Phosphorus Reduction ◽  
Iron Grade ◽  
Iron Ore Concentrate

High-phosphorus oolitic iron ore, treated by suspended flash magnetic roasting, contained 42.73% iron (mainly present as magnetite) and 0.93% phosphorus (present as collophane). Low-intensity magnetic separation (LIMS) was combined with reverse flotation to increase the iron and reduce the phosphorus contents of the roasted product. The results showed that an optimized iron ore concentrate with an iron grade of 67.54%, phosphorus content of 0.11%, and iron recovery of 78.99% were obtained under LIMS conditions that employed a grind of 95% −0.038 mm and a magnetic field of 0.10 T. Optimized rougher reverse-flotation conditions used a pulp pH of 9 and dosages of toluenesulfonamide, starch, and pine alcohol oil of 800 g/t, 1000 g/t, and 40 g/t, respectively; optimized scavenging conditions used a pulp pH of 9 and dosages of toluenesulfonamide, starch, and pine alcohol oil of 400 g/t, 500 g/t, and 20 g/t, respectively. Study of the mechanism of phosphorus reduction showed that the toluenesulfonamide could be adsorbed on the surface of quartz after the action of starch, but adsorption was significantly weakened. The starch inhibitor negatively affected adsorption on quartz, but positively influenced adsorption of phosphorus minerals.

Process Mineralogy of an Oolitic Hematite Ore and its Implications for Mineral Processing

2012 ◽  
Vol 567 ◽  
pp. 131-134 ◽  
Author(s):  
Hui Xin Dai ◽  
Wei Zhao ◽  
Li Kun Gao ◽  
Bao Xu Song
Keyword(s):  
Magnetic Separation ◽  
Mineral Processing ◽  
Processing Technology ◽  
Magnetic Intensity ◽  
Sw China ◽  
Iron Minerals ◽  
Mineralogical Study ◽  
Process Mineralogy ◽  
Hematite Ore ◽  
Oolitic Hematite Ore

Based on process mineralogical study of an oolitic hematite ore in SW China, the texture and structure of the ores, the occurrence of iron minerals and the dissemination of them are determined in detail, which provides scientific reference for forthcoming mineral processing technology. The mineralogical results show that the sizes of the grains are generally under 0.01mm, so the minerals cannot be liberated completely by traditional grinding technology. Moreover, the objective minerals are the assemblages of hematite and chlorite, whose amount is highly variable, so the magnetism also varies widely. Therefore, during the coming magnetic separation tests, the increment of the magnetic intensity should be strictly manipulated to determine the best condition for the ores.

Recovery a Refractory Oolitic Hematite by Magnetization Roasting and Magnetic Separation

2011 ◽  
Vol 361-363 ◽  
pp. 305-310 ◽  
Author(s):  
Chao Guo ◽  
Hui Wang ◽  
Jian Gang Fu ◽  
Kai Da Chen
Keyword(s):  
Magnetic Field ◽  
Magnetic Separation ◽  
Field Intensity ◽  
Magnetic Field Intensity ◽  
Reducing Agent ◽  
Iron Concentrate ◽  
Roasting Temperature ◽  
Iron Grade ◽  
Temperature Time ◽  
Iron Ore Concentrate

Orthogonal test was carried out to investigate effects of multiple factors during the magnetization roasting-magnetic separation process as follow: roasting temperature, time, ratio of reducing agent and magnetic field intensity. Significant order of those factors on grade of iron concentrate is obtained, and opportune condition for magnetic roasting is determined. As the condition that roasting temperature is 850°C, time is 40min, ratio of reducing agent is mcoal/more=12% and magnetic field intensity is 1800Gs, iron ore concentrate whose grade and recovery are 56.32% and 94.03%, respectively, is obtained. At last, through closed-circuit test including magnetization roasting, magnetic separation and reverse flotation, final result is obtained that iron concentrate with phosphorus and silicon are 0.18% and 2.63%, respectively, and its iron grade and recovery are 60.47% and 80.1%, respectively.

Sign in / Sign up

Export Citation Format

Share Document