Present Status of China's Hematite Processing Technology Study

2013 ◽  
Vol 734-737 ◽  
pp. 958-961
Author(s):  
Feng Jiu Li ◽  
Yun Long Qu ◽  
Fu Ping Li ◽  
Jin Rui Zhang
Keyword(s):  
Magnetic Separation ◽  
Present Status ◽  
Recovery Rate ◽  
Separation Process ◽  
Processing Technology ◽  
Reverse Flotation ◽  
Technology Study ◽  
Flotation Process ◽  
Iron Grade ◽  
Selective Aggregation

This paper describes the hematite beneficiation technology progress and equipment,the current research has through biological flotation, flotation and selective aggregation separation process for separating iron minerals.Can reach a maximum of iron grade of 67.50%, metal recovery rate of 75% of the final concentrate of current hematite beneficiation process for gravity separation magnetic separation reverse flotation process.

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.

Process Mineralogy and Concentrating of Hematite-Limonite Ore in Southern China

2011 ◽  
Vol 201-203 ◽  
pp. 2749-2752
Author(s):  
Shu Xian Liu ◽  
Li Li Shen ◽  
Jin Xia Zhang
Keyword(s):  
Southern China ◽  
Close Association ◽  
Separation Process ◽  
Reverse Flotation ◽  
Iron Recovery ◽  
Flotation Process ◽  
Iron Concentrate ◽  
Process Mineralogy ◽  
Concentrate Grade ◽  
Reverse Floatation

The grade of the crude hematite-limonite ore is 39.79%. The main metallic minerals are hematite-limonite. Hematite has disseminated structure distributed in the gangue. Limonite was inlayed as stars in hematite. Due to their fine dissemination and close association with gangue minerals, the hematite and limonite particles are hard to be fully liberated, bringing difficulty in their separation. Staged grinding-separation process consisting of high intensity magnetic separation and reverse floatation wag adopted in the beneficiation test on the regionally representative hematite—limonite ore resource. At a grind of 70.0% -200 mesh for the primary grinding and 98.7% -200 mesh for the secondary grinding, the final iron concentrate grade 58.26% and having an iron recovery of 8.33% can be achieved after reverse flotation process test on magnetic concentrate.

Experimental Research on Beneficiation Process for a Specularite Ore

2011 ◽  
Vol 304 ◽  
pp. 387-390 ◽  
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.

Research on the Middlings from Dong Anshan Iron Ore by Roasting-Magnetic Dressing

2013 ◽  
Vol 826 ◽  
pp. 102-105
Author(s):  
Ji Wei Lu ◽  
Nai Ling Wang ◽  
Wan Zhong Yin ◽  
Rui Chao Zhao ◽  
Chuang Yuan
Keyword(s):  
Magnetic Separation ◽  
Iron Ore ◽  
Reduction Roasting ◽  
Iron Recovery ◽  
Flotation Process ◽  
Iron Concentrate ◽  
Iron Grade

For the middlings (containing siderite) separated from Dong Anshan carbonaceous iron ore which was dressed by a two-step flotation process, using roasting-magnetic and regrinding-magnetic separation, the iron concentrate with iron grade and iron recovery of 60.31%, 87.49% was obtained. Mechanism of reduction-roasting was studied by means of XRD in the end.

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.

The Anionic Reverse Flotation Orthogonal Experiment for XuanLong Oolitic Hematite after Magnetic Roasting-Magnetic Separation

2013 ◽  
Vol 826 ◽  
pp. 130-135
Author(s):  
Ye Gao ◽  
Ya Hui Zhang ◽  
Guang Zun Ouyang
Keyword(s):  
Magnetic Separation ◽  
Orthogonal Experiment ◽  
Reverse Flotation ◽  
Flotation Process ◽  
Orthogonal Experiments ◽  
Concentrate Grade

The concentrate of XuanLong oolitic hematite after magnetic roasting-magnetic separation are further refined. The anionic reverse flotation process is used. The three factors and three levels orthogonal experiments are designed to find appropriate reagent regime and shorten the time. The results demonstrate that the appropriate reagent regime and the effect of the various factors to flotation can be found through nine experiments. Final reagent regime is that the dosage of starch is 1000g/t, the dosage of lime is 3000g/t, the dosage of collector is 500g/t. The final concentrate grade is 63.83%.The recovery is 84.59%.

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.

scholarly journals Semi-Smelting Reduction and Magnetic Separation for the Recovery of Iron and Alumina Slag from Iron Rich Bauxite

Minerals ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 223 ◽  
Author(s):  
Yingyi Zhang ◽  
Qiangjian Gao ◽  
Jie Zhao ◽  
Mingyang Li ◽  
Yuanhong Qi
Keyword(s):  
Particle Size ◽  
Magnetic Separation ◽  
Recovery Rate ◽  
Separation Process ◽  
Al2o3 Content ◽  
Smelting Reduction ◽  
Maximum Particle Size ◽  
Maximum Particle ◽  
Α Al2o3 ◽  
Iron Nugget

This work presents a semi-smelting reduction and magnetic separation process for the recovery of iron and alumina slag from iron rich bauxite ore. The effect of the process parameters on the recovery rate of iron, maximum particle size of the iron nugget, and the Al2O3 content of the alumina slag was investigated and optimized. The results show that the iron nuggets and alumina slag can be obtained in a short time through a semi-smelting reduction and magnetic separation process. The maximum particle size of iron nugget is about 15 mm, and the recovery rate of the iron and Al2O3 grade of the alumina slag are 96.84 wt % and 43.98 wt %, respectively. The alumina slag consisted mainly of alumina (α-Al2O3), calcium hexaluminate (CaAl12O19), gehlenite (Ca2Al2SiO7), and small amounts of hercynite (FeAl4O7), and metallic iron (M.Fe).

Application Study of Flotation Column in Reverse Flotation of Magnetic and Hematite Mixed Iron Ore

2013 ◽  
Vol 457-458 ◽  
pp. 164-167
Author(s):  
Wei Zhi Wang ◽  
Li Ping Chen ◽  
Liu Bei Zhao
Keyword(s):  
Magnetic Separation ◽  
Recovery Rate ◽  
Iron Ore ◽  
Operating Conditions ◽  
Reverse Flotation ◽  
Application Study ◽  
Flotation Column ◽  
System Experiment ◽  
Ore Grade

This test used countercurrent bubble contact flotation column in reverse flotation to improve the grade of magnetic concentrate. By the tests of operating conditions and reagent system experiment, when the ore grade of concentrate after magnetic separation is 42.15%, after one roughing ,we can obtain the grade is 65.82% and recovery rate is 62.79% of the concentrate.

scholarly journals Recovery of γ-Fe2O3 from copper ore tailings by magnetization roasting and magnetic separation

2021 ◽  
Vol 19 (1) ◽  
pp. 128-137
Author(s):  
Bing Luo ◽  
Tongjiang Peng ◽  
Hongjuan Sun
Keyword(s):  
Magnetic Separation ◽  
Magnetic Field Intensity ◽  
Sodium Dodecyl ◽  
Separation Process ◽  
Sodium Dodecyl Sulfonate ◽  
Copper Ore ◽  
Yield Rate ◽  
Optimum Parameters ◽  
Roasting Temperature ◽  
Mineralogical Phase

Abstract To comprehensively reuse copper ore tailings, the recovery of γ-Fe2O3 from magnetic roasted slag after sulfur release from copper ore tailings followed by magnetic separation is performed. In this work, after analysis of chemical composition and mineralogical phase composition, the effects of parameters in both magnetization roasting and magnetic separation process with respect to roasting temperature, residence time, airflow, particle size distribution, magnetic field intensity, and the ratio of sodium dodecyl sulfonate to roasted slag were investigated. Under optimum parameters, a great number of γ-Fe2O3 is recycled with a grade of 66.86% and a yield rate of 67.21%. Meanwhile, the microstructure, phase transformation and magnetic property of copper ore tailings, roasted slag, and magnetic concentrate are carried out.

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