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

Xiao, Junhui; Zhou, Lingli

doi:10.3390/pr7060388

Cited by 16 publications

(8 citation statements)

References 26 publications

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“…The valuable metallic lead and zinc mainly exist in the mineral phases of lead sulfate, lead oxide, zinc oxide, zinc sulfate and zinc ferrite. At the same time, there are also corresponding chemical reactions for calcium, magnesium, aluminum compounds and sulfuric acid [21][22][23][24][25].…”

Section: Lead and Zinc Phase Transformation Mechanism In Sulphuric Acmentioning

confidence: 99%

Extraction of Lead and Zinc from a Rotary Kiln Oxidizing Roasting Cinder

Xiao

Zou

Ding

et al. 2020

Metals

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In this study, sulfuric acid leaching and gravity shaking-table separation by shaking a table are used to extract lead and zinc from a Pb-Zn oxidizing roasting cinder. The oxidizing roasting cinder—containing 16.9% Pb, 30.5% Zn, 10.3% Fe and 25.1% S—was obtained from a Pb-Zn sulfide ore in the Hanyuan area of China by a flotation-rotary kiln oxidizing roasting process. Anglesite and lead oxide were the main Pb-bearing minerals, while zinc sulfate, zinc oxide and zinc ferrite were the main Zn-bearing minerals. The results show that a part of lead contained in lead oxide is transformed to anglesite, and a 3PbO·PbSO4·H2O-dominated new lead mineral phase after acid leaching. A zinc leaching efficiency of 96.7% was obtained under the leaching conditions used: a leaching temperature of 55 °C; a leaching time of 90 min; a sulfuric acid dosage of 20%; a sulfurous acid dosage of 4%; a cinder particle size of <0.3 mm; and a solid-liquid ratio of R = 1:4. After the gravity shaking-table separation, a lead concentrate with 50.2% Pb, 2.33% Zn and lead recovery of 86.0% was produced. The main chemical compounds in leaching residue are anglesite, 3PbO·PbSO4·H2O, SiO2 and ZnFe2O4, while the main chemical compounds in lead concentrate are anglesite, 3PbO·PbSO4·H2O and SiO2.

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Section: Lead and Zinc Phase Transformation Mechanism In Sulphuric Acmentioning

confidence: 99%

Extraction of Lead and Zinc from a Rotary Kiln Oxidizing Roasting Cinder

Xiao

Zou

Ding

et al. 2020

Metals

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show abstract

“…During the segregation roasting process, the calcium chloride reacted with the acidic oxides in the ore (e.g., quartz and aluminosilicate ) and H 2 O, forming hydrogen chloride, as shown in Eq. 3 and Eq.4 [26].…”

Section: Effect Of Calcium Chloridementioning

confidence: 99%

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

Xiao

Ding

Yang

et al. 2019

J min metall B Metall

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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 (Fe 3 O 4), 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, CaCl 2 (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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“…Nickel and iron are the main components of stainless steel. Therefore, the production of ferro-nickel in the form of nickel and iron has no impact on the stainless-steel industry [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Extraction of Nickel from Garnierite Laterite Ore Using Roasting and Magnetic Separation with Calcium Chloride and Iron Concentrate

et al. 2020

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In this study, segregation roasting and magnetic separation are used to extract nickel from a garnierite laterite ore. The garnierite laterite ore containing 0.72% Ni, 0.029% Co, 8.65% Fe, 29.66% MgO, and 37.86% SiO 2 was collected in the Mojiang area of China. Garnierite was the Ni-bearing mineral; the other main minerals were potash feldspar, forsterite, tremolite, halloysite, quartz, and kaolinite in the garnierite laterite ore. The iron phase transformations show that nickel is transformed from (Ni,Mg)O·SiO 2 ·nH 2 O to a new nickel mineral phase dominated by [Ni]Fe solid solution; and iron changed from Fe 2 O 3 and FeOOH to a new iron mineral phase dominated by metal Fe and Fe 3 O 4 after segregation roasting. Ferronickel concentrate with Ni of 16.16%, Fe of 73.67%, and nickel recovery of 90.33% was obtained under the comprehensive conditions used: A roasting temperature of 1100 • C, a roasting time of 90 min, a calcium chloride dosage of 15%, an iron concentrate dosage of 30%, a coke dosage of 15%, a coke size of −1 + 0.5 mm, a magnetic separation grinding fineness of <45 µm occupying 90%, and a magnetic separation magnetic field intensity of H = 0.10 T. The main minerals in ferronickel concentrate are Fe, [Ni]Fe, Fe 3 O 4 , and a small amount of gangue minerals, such as CaO·SiO 2 and CaO·Al 2 O 3 ·SiO 2 .

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

Cited by 16 publications

References 26 publications

Extraction of Lead and Zinc from a Rotary Kiln Oxidizing Roasting Cinder

Extraction of Lead and Zinc from a Rotary Kiln Oxidizing Roasting Cinder

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

Extraction of Nickel from Garnierite Laterite Ore Using Roasting and Magnetic Separation with Calcium Chloride and Iron Concentrate

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