Effects of Compound Silicate Gangue on Formation of …
When the content of K 2 O and Na 2 O was higher in samples, a part of K 2 O and Na 2 O entered into complex calcium ferrite, which caused the fine grains of SFCA …
Investigation on the effects of chemical pretreatment on the iron ore
The particle size distribution of the tailings sample was determined using the laser particle size analyzer (Fraunhofer Hydro 2000S). It was found that the D 80 of the sample was around 41 µm (10% lower than 1.52 µm and 90% higher than 86.78 µm). The surface area of the particles was measured to be 1.55 m 2 /g by laser particle size …
The Recent Increase in Iron Ore Prices and Implications for …
In recent months, shorter-term supply disruptions to Australian iron ore exports have also affected the global iron ore market. The most notable of these disruptions was Tropical Cyclone Veronica in late March, which reduced large firms' iron ore exports from Western Australian ports by close to 25 million tonnes (around 3 per cent of Australia's annual …
Effects of Na2O on calcium silicate hydrates at elevated temperatures
Pectolite is a stable phase in large areas of the system N C S H at 180 to 325°C; it may coexist, depending on Na 2 O concentration and temperature, with tobermorite, xonotlite or foshagite. Sodium carbonate and N S reacted with Ca 2+ in Al 2 O 3 substituted tobermorite to form slightly soluble C C and C S N S H and NaOH. The …
Effect of Na2O on phosphorus distribution between liquid iron …
Given the accelerating depletion of iron ore resources, there is growing concern within the steel industry regarding the availability of high-phosphorus iron ore. ... Desulfurization and simultaneous desulfurization and dephosphorization of molten iron were made by the use of Na2O–SiO2 and Na2O–CaO–SiO2 fluxes at 1 600°C.The degree of ...
Effects of surfactants combination on iron ore flotation
Fig. 1 shows the X-ray diffractograms (XRD) for the iron ore sample, which identified the presence of the mineral phases hematite, quartz and goethite. Download: Download high-res image (103KB) Download: Download full-size image; Fig. 1. X-ray diffractogram of the iron ore sample.
A Study on the Effect of Na2O on the Viscosity for
In this study, molecular dynamics simulation was used to analyze the main effects of Na2O, CaF2, and B2O3 respectively on the melt structure of the traditional …
Effects of Na2O and B2O3 Addition on Viscosity and …
DOI: 10.2355/ISIJINTERNATIONAL.ISIJINT-2018-212 Corpus ID: 104829190; Effects of Na2O and B2O3 Addition on Viscosity and Electrical Conductivity of CaO–Al2O3–MgO–SiO2 System @article{Wanli2018EffectsON, title={Effects of Na2O and B2O3 Addition on Viscosity and Electrical Conductivity of CaO–Al2O3–MgO–SiO2 …
Effect of Coordination Structure of Iron Ions on Iron
Activities of FeO and FeO1.5 in Na2O–SiO2–FeO–Fe2O3 melts have been investigated in terms of the coordination structure of iron ions. The melts were placed in Pt containers at 1573 K and ...
Flow and penetration behaviours of liquid phase on iron ore …
ABSTRACT. The flow and penetration behaviours of the liquid phase on nuclei ore play crucial roles in the bonding of the sinter. In this study, the flow and penetration tests of the liquid phase and simulation tests were conducted to study the effects of SiO 2 and Al 2 O 3 contents of the adhering fines on the flow area (FA) and …
Effects of reductant type on coal-based direct reduction of iron ore …
The results show that the most ideal coal reductant for the direct reduction of iron ore tailings should be rich in fixed carbon and poor in volatile matters; with anthracite as reductant and CaO as flux, the tailing samples roasted and magnetically separated for 180min at 1,300 oC yielded high iron content (90.12%) and iron recovery rate (72.21%).
Effects of Na2O additions to copper slag on iron recovery …
We investigated the effect of flux (lime) addition on the reduction behavior of iron oxide in copper slag by solid carbon at 1773 K (1500 °C). In particular, we …
Discrete Element Modelling of Iron Ore Fines to Include the Effects …
A comprehensive study on the effect of cohesion arising from the addition of moisture on the behaviour of two types of LKAB iron ore fines (KPBO and KPRS) has been carried out. The addition of moisture to the sample has been …
Effects of Basicity and Al2O3 Content on the Chemistry of
The effects of basicity and Al2O3 content on the chemistry of phases in iron ore sinter containing ZnO were investigated by Rietveld analysis of the X-ray diffraction (XRD) patterns. Bulk composition analysis was carried out using inductively coupled plasma-atomic emission spectroscopy (ICP-AES) and wet-chemical analysis. The …
Effects of Na2SO on iron and nickel reduction in a high …
Abstract: This study investigates the reactions of Na2SO4 and its effects on iron and nickel reduction in the roasting of a high-iron and low-nickel laterite ore through gas …
Determination of major and minor elements in iron ore by …
The content of 19 components in iron ore were determined by X-ray fluorescence spectrometry (XRF), including total iron, silicon dioxide, aluminum oxide, calcium oxide, magnesium oxide, manganese ...
Determination of nine components in manganese ore by X
The determination method of 14 components (including TFe, CaO, SiO2, MgO, Al2O3, MnO, TiO2, K2O, Na2O, Ni, Cu, Co, P and S) in iron ore by X-ray fluorescence spectrometry (XRF) with fusion sample ...
Crystallization behavior of iron- and boron-containing nepheline (Na2O
@article{osti_1484678, title = {Crystallization behavior of iron- and boron-containing nepheline (Na2O·Al2O3·2SiO2) based model high-level nuclear waste glasses}, author = {Deshkar, Ambar and Ahmadzadeh, Mostafa and Scrimshire, Alex and Han, Edmund and Bingham, Paul A. and Guillen, Donna and McCloy, John and Goel, …
The effects of MgO and Al
ABSTRACT. Because the behaviours of MgO and Al 2 O 3 during slag formation of high basicity sinter are not clearly understood, the effects of MgO and Al 2 O 3 on softening-melting properties are always arguable. In this paper, four kinds of sinter containing different MgO and Al 2 O 3 content are investigated. Some observations are …
Effects of Iron Ore Tailing on Performance of Hot-Mix Asphalt
AbstractIn Brazil, large quantities of iron ore tailings (IOT) are produced as a result of iron mining, which may affect the environment negatively. This work evaluated the use of IOT in hot mix asphalt type C (HMA-C). For this purpose, IOT was ...
Effects of Iron Ore Tailing on Performance of Hot-Mix Asphalt
PDF | On Jan 1, 2022, Juan Gabriel Bastidas-Martínez and others published Effects of Iron Ore Tailing on Performance of Hot-Mix Asphalt | Find, read and cite all the research you need on ResearchGate
The Effect of Na2O and Al2O3 on Dephosphorization of …
Highly basic CaO based slags saturated with MgO have been studied with respect to the phosphate capacity by measuring the phosphorous distribution ratio between slag and metal under controlled oxygen partial pressure at 1823 K and 1873 K. The effect of Na2O and Al2O3 addition and the activity of FeO and FeO1.5 were also determined. …
A Study on High-Grade Iron ore Beneficiation to Reduce
Iron ore pellets are largely characterized by inherent physical and chemical properties of the ore. Alumina and silica play important roles in determining the productivity of a Blast Furnace. On average, one percent increase in iron content improves productivity by 2% and reduces coke consumption by 1%. Therefore higher iron ore feed content to …
Metals | Free Full-Text | Effects of Al2O3/TiO2/Na2O on Lime …
Here, the effects of Al2O3/TiO2/Na2O additives on the dissolution rate of lime and the composition of molten slag were investigated using a rotating cylinder …
Behavior of phosphorus during the carbothermic
Recently, additives such as Na 2 SO 4 and Na 2 CO 3 have been proven to be capable of enhancing the reduction of phosphorus-rich oolitic hematite ore and the recovery of dephosphorized iron by magnetic separation. In this study, the behavior of phosphorus during the carbothermic reduction of a phosphorus-rich oolitic hematite ore …
Effect of high Na2O addition on distribution of phosphorus …
In order to improve the dephosphorization efficiency of low-basicity converter slag and decrease the consumption of solid CaO, the effect of high Na2O addition (0–15 mass%) on the distribution of P2O5 between solid solution and matrix phase was investigated. The thermodynamic properties of slag samples were calculated by …
Effects of Circulated Flue Gas Components on Iron Ore …
Sulfur dioxide is one of the precursors of acid rain and desulfurization of the exhaust gases in iron ore sintering plants is essential. For the purpose of reducing SO 2 emissions of iron ore sintering, flue gas circulation sintering (FGCS) process was employed to enrich SO 2 content in off-gas in this work. Effects
The effects of iron ore dust on mangroves in Western
Anecdotal evidence suggests that iron ore dust derived from industrialshiploading activities in north-western Australia may be more injurious tomangroves than is naturally-derived dust, because of its more angularstructure and presumed ability to damage stomatal cells. Abaxial hairs onthe most common mangrove, Avicennia marina (Forfk). Vierh., …
Properties of mixed Na2O and K2O iron phosphate glasses
DOI: 10.1016/S0022-3093(99)00641-9 Corpus ID: 92147092; Properties of mixed Na2O and K2O iron phosphate glasses @article{Fang2000PropertiesOM, title={Properties of mixed Na2O and K2O iron phosphate glasses}, author={Xiangyu Fang and Chandra S. Ray and Gaya Kanishka Marasinghe and Delbert E. Day}, journal={Journal of Non-crystalline …
Effect of Na2O Addition on Phosphorus Dissolution from
The reserves of high-phosphorus (P) iron ores are large all over the world. For instance, more than 80% of Western Australian iron ore contains an average of 0.15 mass% P [].To cover the shortage of high-grade iron ores, high-P iron ores will have to be mined and used in future [].When high-P iron ores are used, hot metal with high P …