The Oxidizing Roasting and Reducing Melting of Titaniferous and Conversion Iron Ores

2017 ◽  
Vol 371 ◽  
pp. 117-120 ◽  
Author(s):  
Andrey N. Dmitriev ◽  
G.Yu. Vitkina ◽  
R.V. Petukhov ◽  
L.A. Ovchinnikova
Keyword(s):  
Chemical Composition ◽  
Phase Analysis ◽  
Iron Ore ◽  
Raw Materials ◽  
Pig Iron ◽  
Iron Ores ◽  
X Ray Diffraction ◽  
X Ray ◽  
Melting Temperatures ◽  
Conversion Iron

The chemical composition of pellets of various basicity from pig iron ore materials is described. The metallurgical characteristics (reducibility, strength, softening and melting temperatures) is analyzed. The micro X-ray diffraction phase analysis is made. Also the sinter of various basicity from titaniferous raw materials is investigated.

Occurrences of kaolin in Koutaba (west Cameroon): Mineralogical and physicochemical characterization for use in ceramic products

Clay Minerals ◽  
2015 ◽  
Vol 50 (5) ◽  
pp. 593-606 ◽  
Author(s):  
A. Nkalih Mefire ◽  
A. Njoya ◽  
R. Yongue Fouateu ◽  
J.R. Mache ◽  
N.A. Tapon ◽  
...  
Keyword(s):  
Particle Size ◽  
Chemical Composition ◽  
Thermogravimetric Analysis ◽  
Raw Materials ◽  
Physicochemical Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ball Clays ◽  
Potential Use ◽  
Representative Samples

AbstractThirty clay samples collected from three hills in Koutaba (west Cameroon) were characterized in order to evaluate their potential use as raw materials for ceramics. After preliminary mineralogical identification by X-ray diffraction, three representative samples from the three different hills, referred to hereafter as K1M, K2M and K3M, were selected for further investigation by X-ray fluorescence, plasticity, granularity and thermogravimetric analysis. The main clay minerals are kaolinite (32–51%) and illite (up to 12%). Additional major phases are quartz (32–52%), goethite (6–7%) and feldspars (0–4%). The chemical composition showed variable amounts of SiO2(60–72%), Al2O3(15–20%) and Fe2O3(1–9%), in accordance with the quartz abundance in all of the samples studied. The particle-size distribution showed a large proportion of silty fraction (64–88%) with moderate sandy (9–19%) and clayey fractions ( < 5% for K2M, 12% for K1M and 20% for K3M). All of the clays showed moderate plasticity-index values (8–11%). Because of these characteristics, K1M and K3M may be suitable for use in common bricks and hollow ceramic products. Sieving or the addition of ball clays is recommended to increase the plasticity of sample K2M for use in common bricks.

Fabrication of Baking-free Bricks from Iron Ore Tailings

2020 ◽  
Vol 13 ◽  
Author(s):  
H. J. Chen ◽  
Zi Wang ◽  
Lizhai Pei ◽  
Z. Y. Xue ◽  
C. H. Yu ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Iron Ore ◽  
Raw Materials ◽  
X Ray Diffraction ◽  
Safety Hazard ◽  
Xrd Pattern ◽  
X Ray ◽  
Iron Ore Tailings ◽  
Brick Powder ◽  
Micro Morphology

Aims: The aim is to prepare baking-free bricks using iron ore tailings as the main raw materials. Objective: Iron ore tailings have increased dramatically in recent decades. The storage of the iron ore tailings has potential environmental and safety hazard. Therefore, it is urgent to use the tailings to produce valuable products. Objective: The objective of the research is to treat the tailings by preparing the baking-free bricks. Method: The phases and micro-morphology of the baking-free bricks have been investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The optimal components and preparation parameters of the baking-free bricks were determined by controlling the ratio of the raw materials and forming pressure. The physical properties of the baking-free bricks including compressive strength and density have been analyzed by controlling the forming pressure and curing time. Result: The optimal components of the baking-free bricks is 65wt.% tailings, 5wt.% titanium gypsum, 17wt.% slag, 5wt. Conclusion: Baking-free bricks have been successfully prepared from the iron ore tailings adding a small amount of cementing materials including titanium gypsum, slag, acetylene sludge and waste brick powder. Other: The XRD pattern and SEM observation show that 28 d tailing bricks are mainly composed of irregular particles and a large number of ettringite (Aft) nanorods. The analyzed results revealed that the formed irregular particles and Aft nanorods contribute to the improvement of compressive strength and compactness of the tailing bricks.

scholarly journals Biomass as a Source of Energy in Iron Ore Agglomerate Production Process

2014 ◽  
Vol 59 (2) ◽  
pp. 815-820 ◽  
Author(s):  
M. Fröhlichová ◽  
J. Legemza ◽  
R. Findorák ◽  
A. Mašlejová
Keyword(s):  
Chemical Composition ◽  
Chemical Analysis ◽  
Production Process ◽  
Phase Analysis ◽  
Iron Ore ◽  
Microscopic Analysis ◽  
Alternative Fuel ◽  
Coke Breeze ◽  
X Ray

Abstract This article contains characteristics of selected types of biomass, which can be considered as an alternative fuel in the production of iron ore agglomerate. Selected types of biomass were evaluated by chemical analysis, X-ray phase analysis and microscopic analysis using the camera on microscope Olympus BX 51. Biomass was characterized according to its structure, chemical composition and chemical composition of ash. The obtained data were confronted with the data for coke breeze and based on the results, conclusions were made about the possible use of selected types of biomass as an alternative fuel in the process of iron ore agglomerate production.

scholarly journals Modeling of Bohemian and Moravian glass recipes from Gothic to Baroque periods

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Karolína Pánová ◽  
Dana Rohanová ◽  
Simona Randáková
Keyword(s):  
Chemical Composition ◽  
Western Europe ◽  
18Th Century ◽  
Raw Materials ◽  
Glass Batch ◽  
X Ray Diffraction ◽  
X Ray ◽  
Dispersive System ◽  
Gradual Development ◽  
Written Sources

AbstractThe Bohemian historical glasses have been neglected and have not been in focus of Archaeometric studies so far. Potassium-calcium wood ash glasses, produced in Bohemia and Moravia, from the beginning of the 14th century to the first half of the 18th century, are chemically different from the glasses produced in the same period in Western Europe. There are no written sources for glass batch recipes for Gothic (14th–1st half of 16th c.) and Renaissance (16th–17th c.) glass, while there are only few for the Baroque (end of 17th–18th c.) glass recipes. Systematically investigating the chemical composition and typology of archaeological glasses, we have chosen to reconstruct the glass recipes of potassium-calcium glasses from the three periods. In this study, the glass recipes (the ratio of the raw materials) were calculated based on the chemical composition of the historical glasses studied by X-Ray Fluorescence (XRF) and Scanning Electron Microscopy/Energy Dispersive System (SEM/EDS). The composition of the authentic natural raw materials was studied by XRF and X-Ray Diffraction (XRD): sand or quartz pebbles, beech ash and potash, limestone, NaCl, and As2O3. Model glasses confirmed our presumption of gradual development in the Bohemian glass batch recipes, which used very simple raw materials ratios.

Characterization and Assessment of Iron Ore Tailings as Raw Materials for Construction Industries

2019 ◽  
pp. 1-16
Keyword(s):  
Thermal Stability ◽  
Chemical Composition ◽  
Iron Ore ◽  
Raw Materials ◽  
Experimental Program ◽  
X Ray Diffraction ◽  
Mineralogical Characterization ◽  
Iron Ore Tailings ◽  
Five Elements ◽  
Leaching Behaviour

This chapter deals with the characterization and assessment of iron ore tailings (IOT) as raw materials for the construction industry. This chapter specifies the production process of iron ore and generation of waste material followed by listing the nature and prospective issues of IOT. Methods of IOT characterization are explained through five elements, which are chemical composition, leaching behavior, thermal stability, mineralogical characterization, and morphology. The experimental program and research results of this study are explained in six subtitles, namely chemical composition, leaching behaviour, thermal stability, x-ray diffraction pattern, Fourier transform infrared spectroscopy (FTIR), and field emission scanning electron microscopy (FESEM/EDX). Results revealed that the IOT materials are suitable for use in construction and building industries due to their substantial silica and alumina contents and could possibly be used to fabricate paving blocks, sand-crete blocks, mud blocks, geopolymer bricks, and ceramic floor tiles.

Characterisation of Reduction of Iron Ore with Carbonaceous Materials

2018 ◽  
Vol 280 ◽  
pp. 433-439 ◽  
Author(s):  
N.H. Najmi ◽  
Nur Farhana Diyana Mohd Yunos ◽  
Norinsan Kamil Othman ◽  
Muhammad Asri Idris
Keyword(s):  
Metallic Iron ◽  
Iron Ore ◽  
Raw Materials ◽  
Carbonaceous Material ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
X Ray ◽  
Palm Shell ◽  
Reduction Of Iron ◽  
Stepwise Reduction

An investigation on the reduction of iron ore with carbonaceous material as a reductant was carried out at 1550°C. Iron ore was mixed with biochar from palm shell and coke as a reference at C/O molar ratio of 1.0. Characterisation of raw materials was performed using X-ray Fluorescence (XRF), Brunauer–Emmett–Teller (BET), Fourier Transmittance Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD) and Scanning Electron Microscope (SEM-EDX). The samples after reduction were characterised to study the phase transformation and structural properties. The XRD results revealed the iron ore contained hematite as its main composition. After reduction at high temperature, the hematite has been successfully reduced to metallic iron using biochar as a reductant. It was found that the reaction proceeded in a stepwise reduction of iron oxide. The SEM micrographs proved the formation of metallic iron in the sample after reduction at 1550°C. Through characterisation, the biochar from palm shell has physical properties suitable to be an alternative carbon reductant to replace coke.

The Reduction Processes of the Titanium Containing Iron Ores Treatment

2016 ◽  
Vol 369 ◽  
pp. 6-11 ◽  
Author(s):  
Andrey N. Dmitriev ◽  
R.V. Petukhov ◽  
G.Yu. Vitkina ◽  
Yu.A. Chesnokov ◽  
S.V. Kornilkov ◽  
...  
Keyword(s):  
Iron Ore ◽  
Raw Materials ◽  
Electric Melting ◽  
Iron Ores ◽  
X Ray ◽  
Reduction Processes ◽  
Furnace Melting ◽  
Metallurgical Processing ◽  
Converter Melting

The questions of metallurgical processing of titanium-containing ores are considered. The ores and concentrates of the Kachkanarsky deposit of low-titanous and high-titanous are studied. The reducibility, durability, temperatures of a softening and melting of metallurgical iron ore raw materials are studied in vitro. Via X-ray the structural analysis are carried out. The calculations by means of mathematical models of pyrometallurgical processes are executed. Possibility of the processing of these ores according to schemes is shown: «blast furnace melting − converter melting» and «metallization – electric melting».

Preparation Process of Antioxidation Coating of Prebaked Carbon Anode Steel Claw

2012 ◽  
Vol 164 ◽  
pp. 132-136
Author(s):  
Zhi Xiang Liu ◽  
Zhe Sheng Qiu ◽  
Ji Kang Yan ◽  
Guo You Gan ◽  
Rui Jiao Jia ◽  
...  
Keyword(s):  
High Temperature ◽  
Chemical Composition ◽  
Phase Analysis ◽  
Antioxidant Properties ◽  
Carbon Anode ◽  
Preparation Process ◽  
X Ray Diffraction ◽  
Optimal Thickness ◽  
X Ray ◽  
Aluminium Anode

In this paper, the preparation and antioxidant properties of SnO2coating of steel claw of prebaked carbon used as electrolytic aluminium anode was investigated. A denser SnO2coating on steel claw was prepared by high temperature glaze method . Phase Analysis , microstructure and chemical composition of the steel claw antioxidant coating were by Japan Rigaku D/Max2200 type X-ray diffraction, the Philip XL30 ESEM and EDS. the Oxidation resistance experiments results showed that the better anti-oxidation coating has a optimal thickness size of about 0.4mm.

scholarly journals Optimal Parameters for Obtaining Diammonium Phosphate from off-balance Phosphate Raw Materials of the Karatau Basin

2021 ◽  
Vol 71 (12) ◽  
pp. 85-96
Author(s):  
Guldana Shaimerdenova ◽  
Kurmanbek Zhantasov ◽  
Tynlybek Bazhirov ◽  
Almagul Kadirbayeva ◽  
Gulzat Jussupbekova ◽  
...  
Keyword(s):  
Production Process ◽  
Phase Analysis ◽  
Raw Materials ◽  
Diammonium Phosphate ◽  
Petrographic Analysis ◽  
Optimal Parameters ◽  
X Ray Diffraction ◽  
X Ray ◽  
Material Resources ◽  
The Republic

The article contains information about substandard material resources of phosphorite raw materials of the Republic of Kazakhstan. Samples of phosphate-siliceous raw materials of the Zhanatas Deposit were studied for the content of P2O5. To obtain diammonium phosphate (DAP), off-balance phosphorite from the Zhanatas Deposit was used, containing P2O5-16.18%. Technological solutions for the enrichment of substandard phosphate raw materials `Zhanatas` and the production of DAP from evaporated and non-evaporated WPA are proposed. Information on mineral petrographic analysis and the chemistry of the DAP production process based on the results of X-Ray Diffraction, X-Ray Phase Analysis, and SEM is provided.

scholarly journals Quantitative phase analysis of iron ore concentrates

2002 ◽  
Vol 55 (4) ◽  
pp. 263-266 ◽  
Author(s):  
Geraldo Magela da Costa ◽  
Valdirene Gonzaga de Resende ◽  
Norberto Magno Toríbio
Keyword(s):  
Chemical Analysis ◽  
Iron Ore ◽  
Quantitative Phase Analysis ◽  
Iron Ores ◽  
Sample Holder ◽  
X Ray Diffraction ◽  
X Ray ◽  
Integral Width ◽  
Linear Behavior ◽  
Wet Chemical

The quantification of goethite, magnetite, martite and specularite in iron ores was successfully achieved by a combination of wet chemical analysis and x-ray diffraction. It was found that the intensity of the goethite (111) peak is constant for a certain sample provided that the same sample holder is used. Calibration curves with a linear behavior have been derived using the areas of the above mentioned peak and the amounts of goethite obtained by Mössbauer spectroscopy and optical microscopy. In addition, the integral width of the hematite (012) line broadens linearly as the amount of martite increases, thus allowing an estimation of the amounts of martite and specularite.

Sign in / Sign up

Export Citation Format

Share Document