Stepped-Flotation of Mixed Magnetic Concentrate Carbonates-Containing in Donganshan

2012 ◽  
Vol 454 ◽  
pp. 292-298
Author(s):  
An Lin Shao
Keyword(s):  
Negative Influence ◽  
Total Iron ◽  
Closed Circuit ◽  
Reverse Flotation ◽  
Iron Recovery ◽  
High Quality ◽  
Iron Concentrate ◽  
Iron Grade ◽  
Hematite Concentrate

There are nearly 500 million tons of hematite ores carbonate-containing in Donganshang, China. However, the flotation flowsheet previously of in that area was seriously affected by the siderite. Therefore, many ores could not be processed by ordinary methods. In this study, mixed magnetic concentrate in scene was beneficiated by stepped-flotation, in which siderite was separated in first direct flotation step to eliminate its negative influence on hematite flotation, and then the high quality hematite concentrate could be obtained by second reverse flotation step. When the feed was mixed magnetic concentrate in scene with total iron grade of 42.84% and siderite content of 4.04%, an iron concentrate with iron grade of 67.84% and iron recovery of 69.47% was obtained in closed circuit of stepped-flotation.

scholarly journals Selective Separation of Hematite by a Synthesized Depressant in Various Scales of Anionic Reverse Flotation

Minerals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 124 ◽  
Author(s):  
Arash Tohry ◽  
Reza Dehghan ◽  
Saeed Chehreh Chelgani ◽  
Jan Rosenkranz ◽  
Omid Rahmani
Keyword(s):  
Iron Oxide ◽  
Iron Ore ◽  
Selective Separation ◽  
Reverse Flotation ◽  
High Quality ◽  
Main Hypothesis ◽  
Iron Concentrate ◽  
Ore Processing ◽  
The World ◽  
Apatite Group

Demand for high-quality iron concentrate is significantly increasing around the world. Thus, the development of the techniques for a selective separation and rejection of typical associated minerals in the iron oxide ores, such as phosphorous minerals (mainly apatite group), is a high priority. Reverse anionic flotation by using sodium silicate (SS) as an iron oxide depressant is one of the techniques for iron ore processing. This investigation is going to present a synthesized reagent “sodium co-silicate (SCS)” for hematite depression through a reverse anionic flotation. The main hypothesis is the selective depression of hematite and, simultaneously, modification of the pulp pH by SCS. Various flotation experiments, including micro-flotation, and batch flotation of laboratory and industrial scales, were conducted in order to compare the depression selectivity of SS versus SCS. Outcomes of flotation tests at the different flotation scales demonstrated that hematite depression by SCS is around 3.3% higher than by SS. Based on flotation experiment outcomes, it was concluded that SCS can modify the pH of the process at ~9.5, and the plant reagents (including NaOH, Na2CO3, and SS gel) can be replaced by just SCS, which can also lead to a higher efficiency in the plant.

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.

Floatation Separation Research on Siderite-Containing Iron Concentrate

2010 ◽  
Vol 92 ◽  
pp. 103-109
Author(s):  
Wan Zhong Yin ◽  
Yue Xin Han ◽  
Feng Xie
Keyword(s):  
Iron Ore ◽  
Mining Operation ◽  
Second Step ◽  
High Quality ◽  
Iron Carbonate ◽  
Flotation Process ◽  
Iron Concentrate ◽  
Iron Grade

With the development of mining operation, the content of iron carbonate typically siderite increases evidently in the iron ore produced in Dong Anshan floatation plant, China. The presence of siderite significantly decreases the iron grade in the concentrate produced by the current reverse anionic flotation process. The study shows that the floatability of hematite, siderite and quartz differs with an increase of pH by using the combination of starch and CaCl2 as depressant. A two-step flotation process has been developed to treat Dong Anshan iron ore by which siderite was removed in the first step floatation and in the second step, reverse anionic flotation was used to produce high quality iron concentrate.

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.

scholarly journals Extraction of Cobalt and Iron from Refractory Co-Bearing Sulfur Concentrate

Processes ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 200 ◽  
Author(s):  
Junhui Xiao ◽  
Yushu Zhang
Keyword(s):  
Solid Solution ◽  
Iron Content ◽  
Cobalt Content ◽  
Iron Recovery ◽  
Mineral Phase ◽  
Iron Mineral ◽  
Iron Concentrate ◽  
Cobalt Recovery ◽  
Panxi Area ◽  
Iron Grade

In this study, oxidizing roasting, segregation roasting, and magnetic separation are used to extract cobalt and iron from refractory Co-bearing sulfur concentrate. The Co-bearing sulfur concentrate containing 0.68% Co, 33.26% Fe, and 36.58% S was obtained from V-Ti magnetite in the Panxi area of China by flotation. Cobalt pyrite and linneite were the Co-bearing minerals, and the gangue minerals were mica, chlorite, feldspar, and calcite in Co-bearing sulfur concentrate. The results show that cobalt is transformed from Co-pyrite and linneite to a Co2FeO4-dominated new cobalt mineral phase, and iron is transformed from pyrite to Fe2O3 and an Fe3O4-dominated new iron mineral phase after oxidizing roasting. Cobalt changed from CoFe2O4 to a new cobalt mineral phase dominated by [Co] Fe solid solution, and iron changed from Fe2O3 to a new iron mineral phase dominated by metal Fe and Fe3O4 after segregation roasting. Cobalt concentrate with a cobalt grade of 15.15%, iron content of 71.22%, and cobalt recovery of 90.81% as well as iron concentrate with iron grade of 60.06%, cobalt content of 0.11%, and iron recovery of 76.23% are obtained. The main minerals in the cobalt concentrate are Fe, [Co]Fe, Fe3O4, and SiO2, and the main minerals in the iron concentrate are Fe3O4, FeO, Ca2Si2O4, and Ca2Al2O4.

Experimental Research on High Intensity Magnetic Separation - Reverse Flotation of a Low-Grade Specularite Ore

2011 ◽  
Vol 304 ◽  
pp. 391-394
Author(s):  
Wei Zhi Wang ◽  
Jin Rui Zhang ◽  
Chun Guang Yang
Keyword(s):  
Experimental Research ◽  
High Intensity ◽  
Iron Ore ◽  
Low Grade ◽  
Grinding Process ◽  
Reverse Flotation ◽  
Magnetic Separator ◽  
Total Recovery ◽  
Iron Concentrate ◽  
Iron Grade

An iron ore contains specularite and hematite which are its main iron minerals and carbonates such as calcite which are its main gangue minerals. The ore is very apt to produce slime in the grinding process，leading to a deteriorated beneficiability. The rough iron concentrate can be obtained by using high gradient magnetic separator to discard tailings with the grinding fineness of 95% -0.074mm. Then the rough concentrate is treated by reverse flotation to produce a final concentrate with the operation recovery of 66.49% and the iron grade of 66.12%,and the total recovery of iron could reach58.70%.

Research on Efficient Utilization of Sulphur Concentrate with Deep Flotation Method

2012 ◽  
Vol 588-589 ◽  
pp. 27-33
Author(s):  
Dan Liu ◽  
Shu Ming Wen ◽  
Qin Bo Cao ◽  
Hai Ying Shen ◽  
Jiu Shuai Deng ◽  
...  
Keyword(s):  
Steel Industry ◽  
Raw Material ◽  
Test Scheme ◽  
Efficient Utilization ◽  
High Quality ◽  
Iron Concentrate ◽  
Flotation Method ◽  
Iron Grade ◽  
Chinese Steel Industry ◽  
Iron Bearing

A technology of “depth cleaning- sulfuric and acid producing- residuals for ironmaking” is proposed for efficient utilization of sulphur concentration with high quality. The effect of the main factors involving grinding fineness, activators, collector type and dosage was investigated. On this regard, a close-circuit flotation test scheme was proceeded, by which a high quality sulphur concentrate was obtained with 52.39% of iron grade, 86.44% of iron recovery, 39.46% of sulphur grade and 91.52% of recovery sulphur. This concentrate can be directly used in the production of sulfuric acid and preparation of iron concentrate. This technology can be used to fully utilize sulphur and produce high quality concentrate as iron-bearing feed for steel industry, which will help to extend raw material sourcing for Chinese steel industry.

Research on Cationic Reverse Flotation of Magnetic Concentrate Using a Flotation Column

2014 ◽  
Vol 522-524 ◽  
pp. 1497-1500 ◽  
Author(s):  
Wei Zhi Wang ◽  
Fu Ping Li ◽  
Qing Lei Meng
Keyword(s):  
Experimental Research ◽  
Operating Parameters ◽  
Flow Sheet ◽  
Reverse Flotation ◽  
Optimal Conditions ◽  
Iron Recovery ◽  
Iron Concentrate ◽  
Flotation Column ◽  
Conditional Tests ◽  
Reverse Floatation

An experimental research to improve the grade of a magnetic concentrate from a concentrator using the cationic reverse floatation technology in the countercurrent bubble contact flotation column was conducted. The conditional tests of the pharmaceutical system and the flotation column operating parameters were done. The results show that the iron concentrate with the grade of 70.06% and iron recovery of 93.18% can be achieved according to the flow sheet o f one roughing and two scavengings under the optimal conditions. And the tailing grade is 12.08%.

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.

scholarly journals Analysis on the Conformity between the Closed-Circuit Embroidery Elements of Different Widths and the Digitally Designed Elements

2019 ◽  
Vol 19 (3) ◽  
pp. 250-256
Author(s):  
Žaneta Juchnevičienė ◽  
Milda Jucienė ◽  
Vaida Dobilaitė ◽  
Virginija Sacevičienė ◽  
Svetlana Radavičienė
Keyword(s):  
Closed Circuit ◽  
Dynamic Loads ◽  
Geometrical Parameters ◽  
High Quality ◽  
Quality Requirements ◽  
Textile Materials ◽  
The Creation

Abstract The embroidery process is one of the means of joining textile materials into a system, which is widely applied in the creation of products of special destinations. The development of the functionality of embroidery systems is indissoluble from high-quality requirements for the accuracy of the form of the element. In the embroidery process, the system of textile materials experiences various dynamic loads, multiple stretching, and crushing; therefore, the geometrical parameters of the embroidery element change. The objective of this paper was to analyze the widths of the different square-form closed-circuit embroidery elements and also to perform their analysis with the purpose to evaluate the embroidery accuracy of the embroidered elements. Test samples were prepared in the form of square-form closed-circuit embroidery elements of five different contour widths: 6 mm, 10 mm, 14 mm, 18 mm, and 22 mm. During the investigation, it has been determined that in most cases the contour widths of the five closed-circuit square-form embroidery elements were obtained, smaller than the size of the digitally designed element.

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