How High Grade Iron Ores And Agglomerates Will Affect Coke Rates

JOM ◽  
1956 ◽  
Vol 8 (4) ◽  
pp. 439-442
Author(s):  
John Griffen
Keyword(s):  
High Grade ◽  
Iron Ores

The Gongchangling BIFs from the Anshan–Benxi area, NE China: Petrological–geochemical characteristics and genesis of high-grade iron ores

2014 ◽  
Vol 60 ◽  
pp. 112-125 ◽  
Author(s):  
Xiao-Hui Sun ◽  
Xiao-Qing Zhu ◽  
Hao-Shu Tang ◽  
Qian Zhang ◽  
Tai-Yi Luo
Keyword(s):  
Geochemical Characteristics ◽  
High Grade ◽  
Iron Ores ◽  
Ne China

scholarly journals Högbomite from the Aldan Shield, Eastern Siberia, USSR

1989 ◽  
Vol 53 (371) ◽  
pp. 376-379 ◽  
Author(s):  
Edward S. Grew ◽  
Galina M. Drugova ◽  
N.V. Leskova
Keyword(s):  
Thin Section ◽  
Aldan Shield ◽  
Complex Oxide ◽  
Chemical Data ◽  
High Grade ◽  
Iron Ores ◽  
Eastern Siberia ◽  
Recent Increase ◽  
New Localities

Högbomite, a complex oxide of A1, Fe, Mg, and Ti, is an important constitutent of some iron ores and emery deposits as well as an infrequent accessory in aluminous high-grade rocks (e.g. Grew et al., 1987). The recent increase in reports of new localities (e.g. Rammlmair et al., 1988) suggests that högbomite may be more widespread than is generally perceived. We report here högbomite from the Aldan Shield, Eastern Siberia. This högbomite is remarkable for the wide variation in composition measured in a single thin section. Our report is only the second from the USSR of högbomite for which chemical data are given.

scholarly journals Application of Nano High-Entropy Alloys to Reduce Energy Consumption and Wear of Copper Oxide and High-Grade Iron Ores in Heavy Mining Industries—A Case Study

Minerals ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 16
Author(s):  
Mohammadreza Heydartaemeh ◽  
Mohammad Karamoozian ◽  
Herman Potgieter
Keyword(s):  
Copper Oxide ◽  
Alloy Steel ◽  
Base Alloy ◽  
International Markets ◽  
Work Piece ◽  
High Entropy Alloy ◽  
High Entropy Alloys ◽  
High Grade ◽  
Iron Ores ◽  
High Entropy

Problems relating to the abrasion of equipment is one of the most important issues in mining and associated industries. Hardening is a method of protecting metal equipment, metal tools, or important components against erosion, corrosion, and abrasion. This can be achieved by welding a thin layer of abrasion-resistant metal onto the surface of the work piece. The useful life of a piece of equipment or parts can be significantly increased by applying abrasion-resistant coatings, thereby reducing repair or replacement costs associated with damaged parts. This process is inexpensive in the production of parts and is often economically justifiable. This study focuses on measuring the abrasion resistance of a nano high-entropy alloy against copper oxide and high-grade iron ores. When a base alloy was coated with the nano high-entropy alloy, the abrasion indexes of iron and copper ores decreased from 0.0001647 kg to 0.0000908 kg and from 0.0001472 kg to 0.0000803 kg, respectively. The standard deviation, repeatability, and reproducibility were calculated for the alloy steel blade covered with nano high entropy alloy (N-HEA), producing values of 0.00016, 0.00047, and 0.00040, respectively, while a standard alloy steel blade exhibited values of 0.0003, 0.00047, and 0.00042, respectively. High-entropy alloys and high-entropy nano-alloys have not been used as practical coatings in the mineral industry in any form to date. Utilizing high-entropy nano-alloys in this industry would introduce innovative alternatives for customers, thereby increasing competitive advantages and providing international markets and customers = with the most efficient choices of operational materials.

scholarly journals Geological Controls on High-Grade Iron Ores from Kiriburu-Meghahatuburu Iron Ore Deposit, Singhbhum-Orissa Craton, Eastern India

Minerals ◽  
2017 ◽  
Vol 7 (10) ◽  
pp. 197 ◽  
Author(s):  
Jitendra Prasad ◽  
Akella Venkatesh ◽  
Prabodha Sahoo ◽  
Sahendra Singh ◽  
Nguo Sylvestre Kanouo
Keyword(s):  
Iron Ore ◽  
High Grade ◽  
Iron Ores ◽  
Eastern India ◽  
Ore Deposit ◽  
Iron Ore Deposit

scholarly journals Ultramafic Varėna Suite in the Precambrian crystalline basement of the Southern Lithuania – implications for the origin

Baltica ◽  
2016 ◽  
Vol 29 (2) ◽  
pp. 93-106
Author(s):  
Gediminas Motuza ◽  
Vaida Kirkliauskaitė
Keyword(s):  
Layered Intrusion ◽  
Crystalline Basement ◽  
Ultramafic Rocks ◽  
High Grade ◽  
Iron Ores ◽  
Metasomatic Alteration ◽  
Geochemical Characteristic ◽  
Form Complex ◽  
Igneous Origin ◽  
Mineral Commodities

The Varėna Suite comprises a set of ultramafic rocks: olivinic, pyroxenic, magnetitic, dolomitic, and apatite bearing rocks, which form complex bodies of few sq. km in the Precambrian crystalline basement near the Varėna town in Southern Lithuania. Occurrences of few mineral commodities are related to the Varėna Suite. Magnetitic rocks contain essential resources of high grade iron ores. Phlogopite, apatite, REE and Th mineralization is related to the Varėna Suite. The assessment of the potential for these commodities is primarily dependent on the origin of Varėna Suite, which is still disputed. The models of metasomatic (skarn), and igneous (layered intrusion) origin are proposed earlier. The article presents an overview and reinterpretation of the recent data on the Varėna Suite, its petrographic and geochemical characteristic, as well as the arguments for igneous origin of the Varėna Suite, as the polyphase intrusion with subsequent metasomatic alteration, with alkaline trend.

scholarly journals Improvement of sub-level caving mining methods during high-grade iron ore mining

2021 ◽  
pp. 19-25
Author(s):  
A.V. Kosenko
Keyword(s):  
Mechanical Properties ◽  
Ultimate Strength ◽  
Uniaxial Compression ◽  
Physical Simulation ◽  
Physical And Mechanical Properties ◽  
High Grade ◽  
Iron Ores ◽  
Qualitative And Quantitative ◽  
Mining Methods ◽  
Quantitative Recovery

Purpose. To improve of the sub-level caving mining methods during mining of deposits of high-grade iron ores by applying a rational mode and intensifying the ore drawing. Methodology. It included an analysis of scientific literature, design documentation and the practice of mining of deposits of high-grade iron-ores in complex geomechanical conditions of deep horizons of mines, to establish the formation of fundamentally new foundations of scientific-and-design solutions for the rational extraction of minerals; numerical (application a special computer software package PFC 3D) and physical (based on the application of volumetric physical models and equivalent materials) modeling of ore drawing, aimed at identifying regularities of recovery process depending on the mining-geological and mining conditions of the mining of deposits, and also the physical- and-mechanical properties of the loosened ore mass. Findings. Regularities of changes in the qualitative and quantitative recovery percentages depending on the intensity of the ore drawing and physical-and-mechanical properties of the ore have been established using numerical and physical simulation. The obtained regularities made it possible to substantiate the rational parameters of the structural elements of the technological scheme for drawing and delivery of ore. A linear-alternating condition of ore drawing was developed, which will ensure an increase in the extraction of pure ore up to 10% and, as a result, up to 4.6% of quantitative and up to 5.2% of qualitative indicators of ore percentages, as well as up to 1.5% of absolute quality of mined ore mass. Originality. Power-law dependencies of the change in the angle of ore tapping on the intensity of the ore drawing and the ultimate strength of the ore for uniaxial compression have been established as well as dependencies of the increase in the volume of the tapping figure, when a linear-alternating condition of ore drawing is applied, on the intensity of the ore drawing, the height of the collapsed ore layer and the ultimate strength of the ore for uniaxial compression. Practical value. A linear-alternating condition of ore drawing has been developed, the implementation of which in practice makes it possible to increase the qualitative and quantitative recovery percentages and eliminate the human factor while observing the ore drawing planograms.

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