acid digestion of iron ore
Rapid high-performance sample digestion of base metal
2016年3月1日 Digestion temperatures are controlled essentially by the boiling points of the acid (s) used, which can vary significantly between approximately 110 °C in the case of nitric acid, to 340 °C in the case of sulfuric acid. 2. Experimental 2.1. Design of the 6
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(PDF) Sample Digestion Methods for the Determination of
2002年8月1日 As Ir may be present in SRM 2556 as a metallic impurity that is resistant to attack by all acids, including aqua regia, sample
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Iron ores — Recommended procedures for iron ore
Recommends procedures for iron ore dissolution using either acid digestion or alkali fusion. Deals with the assessment of the advantages and disadvantages of the two
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(PDF) Sample digestion methods - ResearchGate
2014年1月1日 PDF On Jan 1, 2014, Z. Hu published Sample digestion methods Find, read and cite all the research you need on ResearchGate
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A Novel Approach to Fast Digestion of Rare Earth Element
2020年9月29日 These two acids, along with nitric and hydrochloric acids, constitute the basis of the mixture that is typically used for “total” or 4-acid digestions. Moreover, some fusions require reactive fluxes, such as
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Ultra-Trace Analysis of Metals in Mineral Reference
sulfuric/nitric acid digestion. All samples were made up to the volume of 25 mL following digestion. Table 3. Description of samples and CRMs. Sample/ CRM Name ... GIOP-33
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CN101839828B - Digestion method and detection
2010年5月19日 The digestion procedure of iron ore according to a further aspect of the invention, hydrofluorite and nitric acid dosage can be according to the SiO that contains
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Ore Grade Assay (Multi-Acid Digestion) - Eastern Analytical Ltd.
Ore grade analysis provides a higher dissolution for samples with a higher metal concentration. This is a more precise method than the trace geochemistry. Before
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A novel methodology for rapid digestion of rare earth
2016年11月1日 The digestion method developed was able to tackle high iron-oxide and silicate matrices using only phosphoric acid in a time frame of only 8min, and did not
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Rapid high-performance sample digestion of base metal ores
2016年3月1日 For example, in a 1999 application note, CEM describes a two-step application for the digestion of chromite ore; the first step uses a mixture of sulfuric, phosphoric, and nitric acids, and the second step uses nitric acid, with a total digestion times of 2 h, ignoring the time needed for cool down, opening the digestion apparatus,
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A Novel Approach to Fast Digestion of Rare Earth
2020年9月29日 These two acids, along with nitric and hydrochloric acids, constitute the basis of the mixture that is typically used for “total” or 4-acid digestions. Moreover, some fusions require reactive fluxes, such as
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ISO/TR 11422:1996 - Iron ores — Recommended procedures for iron ore
1996年2月21日 Iron ores -- Recommended procedures for iron ore dissolution using either acid digestion. or alkali fusion Minerais de fer -- Méthodes recommandées de dissolution des minerais de fer par digestion acide ou fusion alcaline Ta slovenski standard je istoveten z: ISO/TR 11422:1996 ICS: SIST ISO/TR 11422:2002 en. 2003-01.Slovenski
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A novel methodology for rapid digestion of rare earth element
2016年11月1日 The digestion method developed was able to tackle high iron-oxide and silicate matrices using only phosphoric acid in a time frame of only 8min, and did not require perchloric or hydrofluoric acid. Additionally, excellent recoveries and reproducibilities of the rare earth elements, as well as uranium and thorium, were achieved.
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EPA Method 3050B (SW-846): Acid Digestion of Sediments,
Calcium Silver Iron Chromium Sodium Lead Cobalt Thallium Molybdenum Copper Vanadium Selenium Iron Zinc Thallium Lead Vanadium . 1.2 This method is not a total digestion technique for most samples. It is a very strong acid digestion that will dissolve almost all elements that could become “environmentally available.” By design, elements ...
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Sample Preparation Guides - Inorganic Ventures
Metal – Iron metal dissolves in HCl and dilute H 2 SO 4, forming Fe +2 and liberation of H 2 See following equation: °Fe + H 2 SO 4 = FeSO 4 + H 2 Concentrated cold sulfuric acid had no action, but if hot, SO2 is evolved and Fe+3 formed as per the following equation: 2 °Fe + 6 H 2 SO 4 = Fe 2 (SO 4) 3 + 3 SO 2 + 6 H 2 O
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Method 3005A: Acid Digestion of Waters for Total
Iron Zinc Lead * ICP only **May be analyzed by ICP, FLAA, or GFAA 1.2 When analyzing for total dissolved metals filter the sample, at the time of collection, prior to acidification with nitric acid. 2.0 SUMMARY OF METHOD 2.1 Total recoverable metals - The entire sample is acidified at the tim e of collection with nitric acid.
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Iron Ore, Sample Preparation and Analysis of - ResearchGate
2006年9月15日 Indian iron ore resources consist of both hematitic (10 052 MT) and magnetite (3408 MT) varieties. Major ore types are hard, flaky/friable, lateritic and blue dust or powdery ores.
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Rapid sample preparation for determination of iron in tissue
We developed a rapid acid-digestion method for preparing tissue samples for iron determination. Specimens were digested in nitric acid and hydrogen peroxide under high temperature and pressure in closed Teflon vessels, with microwave energy.
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Ferrozine Assay for Simple and Cheap Iron Analysis of Silica
mesoporous or solid silica shell. This new digestion protocol avoids the need for hydrofluoric acid to digest the surrounding silica shell and provides an accessible alternative to inductively coupled plasma methods. With the updated digestion protocol, the quantitative range of the Ferrozine assay is 1 – 14 ppm. INTRODUCTION:
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2020年2月18日 Wet digestion by nitric and perchloric acid has been recommended for the determination of elements such as Mg, Cu, Fe, Mn, and Zn. [ 11] The aim of this paper is to examine a new method to determine the iron grade of sulfide-containing ores (or concentrates) by using a mixture of perchloric and nitric acid. Materials and Experimental
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ACIDIC DISSOLUTION OF MAGNETITE: EXPERIMENTAL STUDY
2011年4月1日 The objective of this study was to improve understanding of magnetite dissolution mechanisms leading to thermodynamic equilibrium by comparing the dissolution of two solid samples, one synthetic and one industrial, using oxalic, sulfuric, and nitric acids at varying concentrations and temperatures.
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Strengthening Granulating and Sintering Performance of Refractory Iron
2023年3月30日 Iron ore is one of the most critical metal resources in the world [].However, high-quality iron ore resources are being depleted, so poor-quality iron ores have become a focus of world research [2,3,4].Some refractory iron concentrate, with fine particle size, high content of harmful impurities and poor granulating performance, is one of them [5,6].
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Atomic absorption methods for analysis of some elements in
Iron 10 . Lead 10 Nickel 11 Tellurium 11 . Zinc 12 . ... Published methods for rock and ore analysis by atomic absorption are fairly extensive, but scattered. This publication is a compilation of some general and specific ... fusion mass to the filtrate from acid digestion, adding more acid if necessary to dissolve the fusion mass; then follow .
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Rapid high-performance sample digestion of base metal ores
2016年3月1日 Digestion temperatures are controlled essentially by the boiling points of the acid (s) used, which can vary significantly between approximately 110 °C in the case of nitric acid, to 340 °C in the case of sulfuric acid. 2. Experimental 2.1. Design of the 6-channel infrared digestion system
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2016年2月1日 GIOP-33 Fe, Ti Titano-magnetite iron ore. ... such as open-vessel acid digestion, closed digestions, microwave digestion, alkali fusion, use of NH4F for both open and closed digestions, sintering ...
اObtener precioISO/TR 11422:1996 - Iron ores — Recommended procedures for iron ore
1996年2月21日 Iron ores -- Recommended procedures for iron ore dissolution using either acid digestion. or alkali fusion Minerais de fer -- Méthodes recommandées de dissolution des minerais de fer par digestion acide ou fusion alcaline Ta slovenski standard je istoveten z: ISO/TR 11422:1996 ICS: SIST ISO/TR 11422:2002 en. 2003-01.Slovenski
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Metal – Iron metal dissolves in HCl and dilute H 2 SO 4, forming Fe +2 and liberation of H 2 See following equation: °Fe + H 2 SO 4 = FeSO 4 + H 2 Concentrated cold sulfuric acid had no action, but if hot, SO2 is evolved and Fe+3 formed as per the following equation: 2 °Fe + 6 H 2 SO 4 = Fe 2 (SO 4) 3 + 3 SO 2 + 6 H 2 O
اObtener precioAtomic absorption methods for analysis of some elements in
Iron 10 . Lead 10 Nickel 11 Tellurium 11 . Zinc 12 . ... Published methods for rock and ore analysis by atomic absorption are fairly extensive, but scattered. This publication is a compilation of some general and specific ... fusion mass to the filtrate from acid digestion, adding more acid if necessary to dissolve the fusion mass; then follow .
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A novel methodology for rapid digestion of rare earth element
2016年11月1日 A novel methodology for rapid digestion of rare earth element ores and determination by microwave plasma-atomic emission spectrometry and dynamic reaction cell-inductively coupled plasma-mass spectrometry Talanta. 2016 Nov 1;160:521-527. doi: 10.1016/j.talanta.2016.07.067. Epub 2016 Aug 1. Authors Erick Helmeczi 1 , Yong Wang
اObtener precioACIDIC DISSOLUTION OF MAGNETITE: EXPERIMENTAL STUDY
2011年4月1日 The objective of this study was to improve understanding of magnetite dissolution mechanisms leading to thermodynamic equilibrium by comparing the dissolution of two solid samples, one synthetic and one industrial, using oxalic, sulfuric, and nitric acids at varying concentrations and temperatures.
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Method 3005A: Acid Digestion of Waters for Total
1.1 Method 3005 is an acid digestion procedure used to prepare surface and ground water samples for analysis by flame atomic absorption spectroscopy (FLAA) or by inductively coupled argon plasma spectroscopy (ICP).
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Acid Digestion of Ferrochrome Metal - Metallurgist Mineral
2017年10月18日 Acid digestion methods are slow, but require little in the way of attention. Two alternative methods are described here. The A method is the basic method to use for most ferrochrome samples. The B method is for very stubborn samples. Method A Equipment Materials 250-mL beaker and cover. 400-mL beaker and cover. Hotplate.
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mesoporous or solid silica shell. This new digestion protocol avoids the need for hydrofluoric acid to digest the surrounding silica shell and provides an accessible alternative to inductively coupled plasma methods. With the updated digestion protocol, the quantitative range of the Ferrozine assay is 1 – 14 ppm. INTRODUCTION:
اObtener precioIron Ore, Sample Preparation and Analysis of - ResearchGate
2006年9月15日 Indian iron ore resources consist of both hematitic (10 052 MT) and magnetite (3408 MT) varieties. Major ore types are hard, flaky/friable, lateritic and blue dust or powdery ores.
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Iron Removal as Goethite from Synthetic Laterite Leach Solutions
2023年3月26日 Nickel laterite processing through high-pressure acid leaching (HPAL) is a standard technology where most of the iron from the ore is dissolved and rejected in situ, often as hematite and jarosite. Compared to HPAL, atmospheric acid leaching (AL) and heap leaching (HL) of laterites only dissolve the ore, giving much higher levels of solution
اObtener precioStrengthening Granulating and Sintering Performance of Refractory Iron
2023年3月30日 Iron ore is one of the most critical metal resources in the world [].However, high-quality iron ore resources are being depleted, so poor-quality iron ores have become a focus of world research [2,3,4].Some refractory iron concentrate, with fine particle size, high content of harmful impurities and poor granulating performance, is one of them [5,6].
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Determination of silica in iron ore - ScienceDirect
SUMMARY A rapid and reliable routine method for determination of silica in iron ore has been developed and tested. The silica is converted to potassium fluosilicate by digestion with hydrofluoric acid, hydrochloric acid and potassium chloride and
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