Extraction of Manganese and Iron from a Refractory Coarse Manganese Concentrate

In this research, the coarse manganese concentrate was collected from a manganese ore concentrator in Tongren of China, and the contents of manganese and iron in coarse manganese concentrate were 28.63% and 18.65%, respectively. The majority of the minerals in coarse manganese concentrate occur in rhodochrosite, limonite, quartz, olivine, etc. Calcium chloride, calcium hypochlorite, coke, and coarse manganese concentrate were placed in a roasting furnace to conduct segregation roasting, which resulted in a partial chlorination reaction of iron to produce FeCl3, ferric chloride reduced to metallic iron and adsorbed onto the coke, and rhodochrosite broken down into manganese oxide. Iron was extracted from the roasted ore using low-intensity magnetic separation, and manganese was further extracted from the low-intensity magnetic separation tailings by high-intensity magnetic separation. The test results showed that iron concentrate with an iron grade of 78.63% and iron recovery of 83.60%, and manganese concentrate with a manganese grade of 54.04% and manganese recovery of 94.82% were obtained under the following optimal conditions: roasting temperature of 1273 K, roasting time of 60 min, calcium chloride dosage of 10%, calcium hypochlorite dosage of 5%, coke dosage of 10%, coke size of −1 mm, grinding fineness of −0.06 mm occupying 90%, low-intensity magnetic field intensity of 0.14 T, and high-intensity magnetic field intensity of 0.65 T. Most minerals in the iron concentrate were Fe, Fe3O4, and a small amount of SiO2 and CaSiO3; the main minerals in the manganese were MnO, and a small amount of Fe3O4, SiO2, and CaSiO3. The thermodynamic calculation results are in good agreement with the test results.

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Study on Process Concentrating of a Certain Low Grade Hematite Ore in Hebei

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.295-298.3080 ◽

2013 ◽

Vol 295-298 ◽

pp. 3080-3084

Author(s):

Su Juan Yuan ◽

Zhi Yong Shen ◽

Da Yong Zhang

Keyword(s):

Magnetic Separation ◽

High Intensity ◽

Low Grade ◽

Reverse Flotation ◽

Test Results ◽

Iron Concentrate ◽

Low Intensity ◽

Hematite Ore

It was determined through a large amount of beneficiation test to adopt stage grinding-low intensity magnetic separation-high intensity magnetic separation-reverse flotation as the principle beneficiation flowsheet for a certain hematite in Hebei. The test results indicate that we can get iron concentrate with a grade of iron 65.19% and a recovery of iron 63.17% respectively at iron concentrate 21.90%, the primary grinding of 67.54%-200 mesh and secondary grinding of 97.70%-200 mesh.

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Experimental Research on Mineral Processing Technique of a Brazilian Specularite

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.535-537.742 ◽

2012 ◽

Vol 535-537 ◽

pp. 742-745

Author(s):

Wei Zhi Wang ◽

Qing Mei Jia ◽

Chun Guang Yang

Keyword(s):

Magnetic Field ◽

Magnetic Separation ◽

Processing Technique ◽

Mineral Processing ◽

Gravity Separation ◽

Laboratory Research ◽

High Grade ◽

Iron Concentrate ◽

Low Intensity ◽

The Magnetic Field

Laboratory research on the mineral processing technique of a specularite ore from Baxi was performed, while the processes including gravity separation, low intensity magnetic separation(LIMS) -high intensity magnetic separation(HIMS)-gravity separation was adopted. The run-of-mine ore was milled till the -0.074 mm range accounts for 50% and treated through a LIMS – HIMS process, with the magnetic field strength of LIMS being 95.52 kA/m and HIMS,1.2T. As a result, an iron concentrate grading about 67.58% at a recovery of 96.21% can be obtained, which are rather good metallurgical performances. The iron concentrate with high grade also could be beneficiated by table separation, but its recovery is lower than it obtained from intensive LIMS – HIMS dressing.

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Experimental Research on Beneficiation Process for a Specularite Ore

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.304.387 ◽

2011 ◽

Vol 304 ◽

pp. 387-390 ◽

Cited By ~ 1

Author(s):

Wei Zhi Wang ◽

Jin Rui Zhang ◽

Chun Guang Yang

Keyword(s):

Magnetic Separation ◽

Experimental Research ◽

High Intensity ◽

Iron Ore ◽

Separation Process ◽

Gravity Separation ◽

Clay Material ◽

Reverse Flotation ◽

Test Results ◽

Iron Concentrate

An iron ore contains specularite and hematite which are its main iron minerals. And its main gangue minerals are specularite, part of the clay material and a small amount of quartz.Tests are made on the ore by adopting processes including gravity separation, high intensity magnetic separation, high intensity magnetic-gravity separation and high intensity magnetic - reverse flotation. The test results show that the separation process of high intensity magnetic-reverse flotation can obtain an iron concentrate grading about 66.62% at a recovery of 58.38％ from an iron ore assaying around 35.00% iron, rather good metallurgical performances.

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Use of Semi-Dipole Magnetic Field for Spacecraft Radiation Protection

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.190.713 ◽

2012 ◽

Vol 190 ◽

pp. 713-716

Author(s):

Tara Ahmadi

Keyword(s):

Magnetic Field ◽

Radiation Protection ◽

Human Body ◽

High Intensity ◽

Cosmic Radiation ◽

Radiation Effects ◽

Permanent Magnets ◽

Low Intensity ◽

Dipole Magnetic Field ◽

Intensity Magnetic Field

There are various methods to shield spacecraft from energetic particles, like one based on the usage of the permanent magnets. At the same time this method is not perfect; it only suggests low intensity magnetic field because of neglecting galactic cosmic radiation effects on human body. In this paper, hyper thin rings as a shield for spacecraft are suggested. Although these rings are lighter than permanent magnets, their ability to protect spaceship with a safe and high intensity magnetic field is higher than the magnets.

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Recovery a Refractory Oolitic Hematite by Magnetization Roasting and Magnetic Separation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.361-363.305 ◽

2011 ◽

Vol 361-363 ◽

pp. 305-310 ◽

Cited By ~ 1

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.

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Upgrading iron and removing phosphorus of high phosphorus oolitic iron ore by segregation roasting with calcium chloride and calcium hypochlorite

Journal of Mining and Metallurgy Section B Metallurgy ◽

10.2298/jmmb180722032x ◽

2019 ◽

Vol 55 (3) ◽

pp. 305-314 ◽

Cited By ~ 5

Author(s):

J. Xiao ◽

W. Ding ◽

Y. Peng ◽

Qi. Wu ◽

Z. Chen ◽

...

Keyword(s):

Magnetic Separation ◽

Calcium Chloride ◽

Phosphorus Content ◽

Magnetic Minerals ◽

Calcium Hypochlorite ◽

Iron Concentrate ◽

Low Intensity ◽

High Phosphorus ◽

Oolitic Iron Ore ◽

Western Hubei

The iron-bearing ore, existing in the form of oolite, was mainly composed of hematite, limonite, daphnite, and collophane. The harmful element phosphorus content was 1.56%, belonging to high phosphorus ooliticiron ore in western Hubei. In this study, segregation roasting and low intensity magnetic separation techniques were applied for upgrading iron and removing phosphorus. The ores, the chlorinating agent, and the reducing agent were mixed into the roasting furnace for segregation roasting. After being transferred from the weak magnetic minerals to the strong ones, the iron was recovered by low intensity magnetic separation. During segregation roasting, new ore phases, metallic iron (Fe), a small amount of ferroferric oxide (Fe3O4), and ferrous oxide (FeO) could be observed. The results showed that the iron concentrate with the Fe content of 90.3%, the phosphorus content of 0.15%, and the iron recovery of 92.9% were obtained under the segregation roasting temperature of 1273 K, and the roasting time of 90 min, CaCl2 (calcium chloride) 20%, Ca (ClO)2 (calcium hypochlorite) 3%, the dosage of coke 20%, and low intensity magnetic separation field intensity 0.12 T.

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Experimental Study on the Mineral Processing of a High-Clay and Lean Hematite

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.550-553.2831 ◽

2012 ◽

Vol 550-553 ◽

pp. 2831-2834

Author(s):

Wei Zhi Wang ◽

Qing Mei Jia ◽

Chun Guang Yang

Keyword(s):

Experimental Study ◽

Magnetic Separation ◽

Experimental Research ◽

High Intensity ◽

Mineral Processing ◽

Shaking Table ◽

Iron Recovery ◽

Iron Concentrate ◽

Second Stage ◽

Low Intensity

The mineral processing experimental research was carried out on a high mud content lean hematite. The results showed that using the technological flowsheet of “stage grinding- low intensity magnetic separation for obtaining concentrate - high-intensity magnetic separation for discarding tailings-gravity separation(shaking table)”,a final iron concentrate with TFe grade of 65.89% ,yield of 19.35% and iron recovery of 52.32% from the raw ores with TFe grade of 24.07％ was obtained, with the first stage grinding size being 50% -200 mesh and the second stage,95% -200 mesh.

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