Sulfur Content Reduction and Iron Grade Improvement of V-Ti Magnetite Concentrate by Combining Reverse Flotation and Magnetic Separation

2012 ◽  
Vol 524-527 ◽  
pp. 1115-1123 ◽  
Author(s):  
Jiu Shuai Deng ◽  
Shu Ming Wen ◽  
Shao Jun Bai ◽  
Mei Fang Xie ◽  
Hai Ying Shen
Keyword(s):  
Magnetic Separation ◽  
Sulfur Content ◽  
Ph Value ◽  
Mineral Resources ◽  
Open Circuit ◽  
Low Grade ◽  
Reverse Flotation ◽  
Magnetic Intensity ◽  
Magnetite Concentrate ◽  
Iron Grade

For low-grade iron ore, smelting costs and resource wastage will be increased. Product quality of such ore is affected adversely by an excessive amount of sulfur. This also causes environmental pollution. In accordance with the vanadium-titanium (V-Ti) magnetite concentrate properties with low iron grade and high sulfur content, the joint process of magnetic separation and flotation was carried out. Magnetic separation was conducted to increase the iron grade, while reverse flotation was used to reduce sulfur content. Results show that the feeding mainly contains titanomagnetite, hematite, and pyrite. The sulfur was primarily found in pyrite. The separation effect was influenced by the grinding fineness, magnetic intensity, collector type and dosage, and pH value. At a grinding fineness of −45 μm accounting for 87%, most of the iron minerals exhibited monomer dissociation. An open-circuit experiment was carried out under the best conditions of magnetic intensity, as well as collector and modifier dosage. Good experimental results were obtained as follows: the iron grade increased to 57.17%, iron recovery was 89.94%, sulfur content decreased from 0.66% to 0.26%, reverse flotation of sulfur foam concentrate contained almost 15.68% sulfur, the upgrade ratio was about 23, and the cobalt in the sulfur concentrate was enriched 20-fold. A method for improving the comprehensive utilization level and effect of mineral resources is provided in this study.

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.

scholarly journals Characterization of Band-E Narges magnetite iron ore for mineral processing

2018 ◽  
Vol 22 (2) ◽  
pp. 145-148
Author(s):  
Amir Pazoki ◽  
Reza Rashidi-Khabir ◽  
Reza Jahanian ◽  
Ali Pourbahaadini
Keyword(s):  
Magnetic Separation ◽  
Sulfur Content ◽  
Iron Ore ◽  
Iron Recovery ◽  
Experimental Conditions ◽  
Isfahan Province ◽  
Initial Content ◽  
Iron Grade ◽  
The City

The Band-e Narges deposit is located about 70 km northeast of the city of Badrud, northern Isfahan province. Band-E Narges ore deposit is mining for magnetite. To release valuable minerals, crushing and grinding implemented for separation ore from the gangue. Magnetic separation and flotation methods for upgrading magnetite iron ore were carried out in different experimental conditions with varied parameters. The particle size of the initial content was 74 microns for flotation, and 150 microns for magnetic separation. The initial samples, with the iron grade of 43.4% and sulfur of 1.9%, are individually subjected to upgrading by floatation and magnetic separation during which the affecting parameters for each method were optimized. The improvement in the optimal condition for magnetic separation culminated in 60.85% for the iron grade, 85.21% iron for recovery and 1.08% for sulfur content. The upgrading by floatation in the optimal mode produced 60.02% iron grade, 80.41% iron recovery and 0.95% sulfur content. To determine the best method for the pre-concentration stage of ore, the content gained from each technique passed reclining for grad improvement. The final content obtained from the magnetic separation of was undergone the floatation test yielded to a content with 64.3% iron grade, 77.15% iron recovery and 0.7% sulfur content. The use of magnetic separation as a pre-concentration stage for floatation method is proposed as an economical method for improving the grade of the iron and reduce the sulfur content and to avoid the high cost of grinding, which is costly part of processing procedures.

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.

Flotation and Purification Research on Low Grade Magnesite in Kuandian of Liaoning

2010 ◽  
Vol 92 ◽  
pp. 97-102 ◽  
Author(s):  
Qiang Li ◽  
Wan Zhong Yin ◽  
De Shan Zhu ◽  
Zhen Fu Lv
Keyword(s):  
Open Circuit ◽  
Low Grade ◽  
Reverse Flotation ◽  
Optimum Conditions ◽  
Silicate Minerals ◽  
Systematic Process ◽  
Mineralogical Investigation

Low grade magnesite coexisting with dolomite was purified by flotation. A process of reverse flotation to remove silicate minerals- positive flotation to concentrate magnesite was explored after the systematic process mineralogical investigation. Influence of different conditions such as grinding fineness experiment, collector experiment and combined modifiers experiment was also investigated. Open-circuit flotation test was carried out under the optimum conditions. It was showed in the result that the MgO content in concentrate was increased from 32.36% to 42.25%, the CaO and SiO2 contents in concentrate were decreased from1.08% and 17.70% to 6.73% and 0.19% respectively, but the recovery of MgO was not satisfactory.

Experimental Research of Low-Grade Tin-Iron Ore Separation

2013 ◽  
Vol 641-642 ◽  
pp. 377-380
Author(s):  
Yi Miao Nie ◽  
Qi Hui Dai ◽  
Xiao Long Lu
Keyword(s):  
Magnetic Separation ◽  
Concentration Ratio ◽  
Iron Ore ◽  
Shaking Table ◽  
Low Grade ◽  
Gravity Concentration ◽  
Iron Concentrate ◽  
Stage Separation ◽  
Concentrate Grade ◽  
Iron Grade

Iron ore and tin mineral are the mainly recovered minerals of the low-grade ore, which could be effectively separated by a strong magnetic separation-gravity concentration process, with ore iron grade of 20.3%, tin grade 0.18%. Stage grinding and stage separation was used, getting the grade of iron concentrate and the recovery rate of tin separation index, the feeder of tin was magnetic separation tailing, by shaking table re-election, obtained tin concentrate grade was 10%, production was 0.34% (compared to the original ore, tin dressing) .Tin concentration ratio reached more than 330.

The Study on Microwave Magnetic Roasting Plus Magnetic Seperation and Acid Pickling to Enrich Nb of Low-Grade Niobium Minerals

2012 ◽  
Vol 182-183 ◽  
pp. 17-22 ◽  
Author(s):  
Jie Li ◽  
Jun Wang ◽  
Bao Wei Li ◽  
Lei Wang
Keyword(s):  
Particle Size ◽  
Magnetic Separation ◽  
Separation Process ◽  
Low Grade ◽  
Iron Recovery ◽  
Separation Effect ◽  
Acid Pickling ◽  
Low Intensity ◽  
Separation Result ◽  
Iron Grade

In present article, the low intensity magnetic separation process was studied for the low-grade niobium minerals by microwave magnetic roasting. The influence of magnetic density, particle size of grinding and dispersant addition on the magnetic separation effect of sinter ore with the best magnetisability was investigated emphatically. The results show that the iron recovery was decreased and the iron grade increased gradually with decreasing the magnetic density and particle size of grinding. The magnetic separation result of sinter ore was optimal under the magnetic density of 80KA / m and the grinding grain-size of 33 μm. Fine grinding can effectively make Fe separated from Nb, especially when the dispersant(industrial alcohol) was used in the process of magnetic separation , resulting in the improvement of the grade of iron from 57.2% to 60.5% and enrichment of Nb in the tailing ore(the grade of Nb was 5.01%). After the acid pickling of tailing ore containing Nb, the grade of Nb in the extract was improved to 12.36%, which was enriched four times more than that of low-grade niobium ore before microwave magnetic roasting.

An Investigation for Recovering Zinc and Iron from Gossan

2013 ◽  
Vol 826 ◽  
pp. 10-13
Author(s):  
Jin Lin Yang ◽  
Hong Mei Zhang ◽  
Jin Peng Feng ◽  
Shao Jian Ma ◽  
Xiu Juan Su
Keyword(s):  
Zinc Oxide ◽  
Magnetic Separation ◽  
Gravity Separation ◽  
Low Grade ◽  
Magnetic Intensity ◽  
Physical Separation

In recent years, recovering zinc from low grade oxidized zinc ore has been a matter of discussion. In this paper, the investigation for recovering zinc and iron from gossan ores was carried out. In generally, the conventional physical separation methods, such as flotation, gravity separation and magnetic separation, were used to treat the low grade ore, and flotation is the most commonly used method for beneficiation and pretreatment of oxidized zinc minerals. However, gravity separation and magnetic separation are used to deal with the gossan ores because of the special zinc oxide ore bearing iron 40.2% in this study. The effects of grinding fineness and magnetic intensity were investigated, respectively. The results show that the grade of zinc and iron increase slightly, and the best result is that the grade of zinc and iron are 13.35% and 40.25%, the recovery of zinc and iron are 53.45% and 52.19%.

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

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.

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.

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