Biologically induced iron ore at Gunma iron mine, Japan

1999 ◽  
Vol 84 (1-2) ◽  
pp. 171-182 ◽  
Author(s):  
Junji Akai ◽  
Kurumi Akai ◽  
Makoto Ito ◽  
Satoshi Nakano ◽  
Yonosuke Maki ◽  
...  
Keyword(s):  
Iron Ore ◽  
Iron Mine

Production of Free Radicals Arising from the Surface Activity of Minerals and Oxygen. Part I. Iron Mine Ores

1985 ◽  
Vol 5 (6) ◽  
pp. 1061-1078 ◽  
Author(s):  
Dominique Costa ◽  
Joelle Guignard ◽  
Roger Zalma ◽  
Henri Pezerat
Keyword(s):  
Surface Activity ◽  
Iron Ore ◽  
Particle Surface ◽  
Radical Oxygen Species ◽  
Lung Cancers ◽  
Surface Sites ◽  
Iron Mine ◽  
Mineral Dusts ◽  
Trapping Agent ◽  
Excess Incidence

The excess incidence of lung cancers observed in many metal mines probably is not only correlated with radioactivity but also with the inhaled dusts. In an attempt to determine a possible mechanism of carcinogenicity related to the surface activity of dusts, using the spin-trapping agent and ESR spectroscopy, one can demonstrate that some mineral dusts from iron ore mines are very active in an oxidative process in aqueous medium, implying the formation of radical oxygen species on reducing surface sites of the solid. This reducing surface activity of the dusts depends on the presence of Fe2+ ion in the lattice and on the process of activation and passivation of the surface sites. The more simple process of activation is the dissolution of the oxidized coating on the particle surface. Among the oxides, oxyhydroxides, carbonates, and silicates, the magnesium-iron phyllosilicates (chlorite, biotite, berthierine) appear the most active. The siderite FeCO3 is also active, but the iron oxides and oxyhydroxides are generally nonactive.

Smelting Copper Ore from Rudna Glava, Yugoslavia

1982 ◽  
Vol 48 (1) ◽  
pp. 459-465 ◽  
Author(s):  
R. F. Tylecote ◽  
P. T. Craddock
Keyword(s):  
Bronze Age ◽  
Iron Ore ◽  
Copper Deposit ◽  
British Museum ◽  
Mining Area ◽  
Copper Ore ◽  
Copper Mine ◽  
Iron Mine ◽  
Chalcolithic Period ◽  
Copper Ores

Jovanovič has recently drawn attention to the early copper mine at Rudna Glava in the copper mining area of Maidanpek-Bor in Eastern Serbia (Jovanovič 1979, 103). This copper deposit has iron associated with it. In some respects this occurrence of iron and copper together compares with the deposit at Phalabora in South Africa where copper and other minerals are mined today. Rudna Glava has been a copper mine in the Chalcolithic period and an iron mine in the Turkish period. Today it is worked out, but the working of the iron ore has left exposed some of the shafts and galleries used by Chalcolithic and Bronze Age copper miners. It has been possible to obtain a sample of the copper ores used in the early periods and integrate them into a smelting programme (Tylecote et al. 1977, 305), the main purpose of which has been to determine the partitioning of the three elements between the ore, the slag and the metal. The object of this exercise was to try and relate the artefacts, the slag, and metal to the ore source. So far, ores from the British Isles, Spain, and Africa have been examined and reported (Tylecote 1977). The sample from Yugoslavia came rather too late for the first report but the work is continuing.The smelting work described in this report was carried out by Ali Ghaznavi and the analyses were kindly made by R. Hetherington formerly of Newcastle University and Dr P. T. Craddock of the British Museum Research Laboratory. I have to thank Dr B. Jovanovič of the Archaeological Institute, Belgrade, for supplying the material and inspiring the work.

KAJIAN PENAMBANGAN BIJIH BESI DI SUNGAI RIAM, PEMALONGAN DAN SUMBER MULIA KECAMATAN PELAIHARI KABUPATEN TANAH LAUT KALIMANTAN SELATAN

2012 ◽  
Vol 11 (2) ◽  
Author(s):  
Hidir Tresnadi
Keyword(s):  
Quality Management ◽  
Steel Industry ◽  
Iron Ore ◽  
Small Scale ◽  
Iron Ore Mine ◽  
Environment Quality ◽  
Iron Mine ◽  
Owned Company ◽  
Mining Work

The need of iron ore as material for steel industry in 2006 increased, so the are many iron ore mine activity in Kabupaten Tanah Laut, South Kalimantan. There are 25 cooperation contract between Pememerintah Daerah owned Company, PT Baratala Tuntung Pandang, as owner of contract of work for Iron Ore Mine, five companies have contracts of Mining Work and three companies have contracts of expolration work. The iron ore production increased from 115,658.484 MT in 2006 to 445,286 MT. The objectives of study is to delineate the iron mine activities in Kabupaten Tanah Laut, Kalimantan Selatan Province. The small scale mine of Iron ore involved the local people and semi mechanic equipment such back hoe, Bull Dozer, shovel and rock breaker for breake the source rock. Meanwhile there some grizllies to seperate the iron ore based on the size. The size of iron ore are lump ore to fine ore to stockpile. The survey iron ore mine are in Pemalongan, Sumber Mulia (three cooperationcontract) and Sungai Riam (three cooperation contract). The production iron ore of local mine people in the three mine ore location are prized from Rp. 4000,- per pack to Rp. 8000,- per pack. The iron ore quality of a pack id about 40 Kg to 50 Kg, and the quality based on the visual only. The Mine Iron environment quality management should be increased to keep the environment quality under control for the easier reclamation in the closure mine in post mine time.

Authigenic halloysite from El-Gideda iron ore, Bahria Oasis, Egypt: characterization and origin

Clay Minerals ◽  
2004 ◽  
Vol 39 (2) ◽  
pp. 207-217 ◽  
Author(s):  
H. M. Baioumy ◽  
M. S. Hassan
Keyword(s):  
Iron Ore ◽  
Clay Fraction ◽  
Late Eocene ◽  
Exothermic Peak ◽  
Endothermic Peak ◽  
Basal Spacing ◽  
Dimethyl Formamide ◽  
Interlayer Water ◽  
Iron Mine ◽  
Iron Forms

AbstractHalloysite in El-Gideda iron mine occurs as very soft, light and white-to-pinkish white pockets and lenses ranging in diameter from 50 cm to 1 m within the iron ore. Highly hydrated halloysite is the main constituent of these pockets beside some kaolinite and alunite. The diffraction pattern of the clay fraction (<2 mm) shows a rather broad and diffuse 001 reflection spread between 10.3 and 13.6°2θ. Upon treatment, the 001 reflection of halloysite expands up to 10.94 Å and 11.9 Å corresponding to ethylene glycol and dimethyl formamide treatment, respectively. After these treatments, kaolinite appeared with its characteristic basal spacing (~7 Å). The percentage of halloysite in halloysite-intercalated kaolinite ranged between 80 and 90%. Heating to 350°C, produces a kaolinite-like structure (~7.1 Å) that developed to a metakaolinite-structure when heated to 550°C. Morphologically, halloysite appears as well developed tubes composed entirely of SiO2 and Al2O3, while kaolinite is characterized by very fine platelets arranged in book-like or rosette-like shapes. A differential thermal analysis curve of the studied halloysite showed an endothermic peak at ~138°C due to the dehydration of interlayer water of halloysite. The small shoulder at ~540°C and the endothermic peak at ~593°C is attributed to the dehydroxylation of halloysite, kaolinite and alunite. On the other hand the exothermic peak that appeared at 995°C is due to the formation of new phases such as mullite and/or spinel. The infrared vibrational spectrum is typical of highly disordered halloysite and kaolinite.Halloysite was formed as a result of alteration of the overlying glauconite suggesting intensive chemical alteration during a humid wet period that prevailed in the Bahria Oasis during the late Eocene. Glauconite alteration releases K, Fe, silica and alumina. Iron forms at least part of the iron ore in the El-Gideda mine while alumina forms halloysite as well as alunite when interacted with silica in an acidic environment.

scholarly journals The Laboratory-Based HySpex Features of Chlorite as the Exploration Tool for High-Grade Iron Ore in Anshan-Benxi Area, Liaoning Province, Northeast China

2020 ◽  
Vol 10 (21) ◽  
pp. 7444
Author(s):  
Dahai Hao ◽  
Yuzeng Yao ◽  
Jianfei Fu ◽  
Joseph R. Michalski ◽  
Kun Song
Keyword(s):  
Hyperspectral Imaging ◽  
Iron Ore ◽  
Wall Rock ◽  
Liaoning Province ◽  
Mining District ◽  
High Grade ◽  
Banded Iron Formations ◽  
Iron Mine ◽  
Exploration Tool ◽  
Resources Evaluation

Anshan-Benxi area in Liaoning province is an important banded iron formations (BIFs) ore-mining district in China. Chlorite is widely distributed in this area, which is related to BIFs and high-grade iron ore, respectively. A fast and convenient method to identify the type and spatial distribution of different chlorites is crucial to the evaluation of high-grade iron ore in this area. Qidashan iron mine is a typical BIFs deposit, and its BIFs-related high-grade iron ore reserves are the second largest in the area. In this paper, the laboratory-based HySpex-320m hyperspectral imaging was used to study the wall rock in Qidashan iron mine. A hyperspectral imaging processing model was established for mineral identification, mineralogy mapping, and chlorite spectral features extraction. The results show that the wavelength positions of OH, Fe-OH, and Mg-OH absorptions of chlorite in the altered wall rock of high-grade iron ore are between 1400 and 1410, 2260 and 2265, and 2360 and 2370 nm, respectively, which are longer than those around BIFs. The relationship between cations in the octahedral layer of chlorite and the wavelengths of OH, Fe-OH, and Mg-OH indicates that Mg and Mg/(Mg + Fe) are inversely related to these wavelengths, whereas Fe is positively related. The wavelengths appear to be weakly influenced by AlVI. Since the bandpass of hyperspectral imaging systems is usually less than 10 nm, these chlorite wavelength differences can be used as a favorable tool for the high-grade iron ore exploration and the iron resources evaluation in the Anshan-Benxi area.

scholarly journals Biogenic Iron Ore : TEM Observation of Iron Ore Mineral(Goethite) from Gumma Iron Mine

1996 ◽  
Vol 26 (2) ◽  
pp. 93-97
Author(s):  
Junji AKAI ◽  
Kohki KAWAMOTO ◽  
Kurumi AKAI
Keyword(s):  
Iron Ore ◽  
Iron Mine ◽  
Biogenic Iron

scholarly journals Treatment and Recycling of the Process Water in Iron Ore Flotation of Yuanjiacun Iron Mine

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Wen-li Jiang ◽  
Hai-feng Xu
Keyword(s):  
Sodium Hypochlorite ◽  
Iron Ore ◽  
Process Water ◽  
Iron Recovery ◽  
Oxidation Treatment ◽  
Flotation Recovery ◽  
Diallyldimethylammonium Chloride ◽  
Iron Mine ◽  
Settling Performance ◽  
Better Than

Coagulating sedimentation and oxidation treatment of process water in iron ore flotation of Yuanjiacun iron mine had been studied. The process water of this mine carried residual polyacrylamide (PAM), poly(diallyldimethylammonium chloride) (PDADMAC), and Ca2+ from the flotation and caused decrease of the iron flotation recovery or grade of the concentrate. The studies on high-intensity magnetic separation (HIMS) tailings for coagulating sedimentation showed that the settling performance of coagulant (named CYH) was better than that of PDADMAC. The analyses of FTIR spectra and zeta potential demonstrated that CYH is adsorbed mainly through electrostatic attraction onto HIMS tailings. Sodium hypochlorite was adopted to oxidize the residual organics in tailings wastewater. When sodium hypochlorite is at the dosage of 1.0 g/L, reaction temperature is of 20°C, and reaction time is of 30 minutes, the removal rates of PAM, COD, and Ca2+ were 90.48%, 83.97%, and 85.00%, respectively. Bench-scale flotation studies on the treated tailings wastewater indicated that the iron recovery and grade of concentrate were close to those of freshwater.

scholarly journals Mineralogical characterization and comparative study of two processing methods of iron ore from the Anini deposit (NE Algeria)

2019 ◽  
Vol 28 (1) ◽  
pp. 11-18
Author(s):  
R. Chaabia ◽  
A. Benselhoub ◽  
M. Bounouala ◽  
A. Makhlouf ◽  
Á. G. Rodrigo ◽  
...  
Keyword(s):  
Comparative Study ◽  
Iron Content ◽  
Iron Ore ◽  
Mineral Resources ◽  
The Other ◽  
Mineralogical Characterization ◽  
Iron Mine ◽  
The One ◽  
Representative Samples ◽  
Wet Sieving

The objective of this article is to study the possibilities of enrichment of the iron ore from Jebel Anini and to develop these mineral resources in order to use them in the metallurgical complex of Annaba. Representative samples were taken from Anini iron mine located in the northwest of the Wilaya of Setif. After sampling, mineralogical, chemical and size particles’ characterization was carried out. However, the analyzes performed by (XRD, SEM and FX) show that the ore is iron type hematite clay and siliceous gangue. The average contents of Fe2O3, SiO2 and Al2O3 are respectively 55%, 26.20% and 12%. The data collected after several preliminary tests of enrichment by washing (wet sieving) of the ore reveal significant results in iron content is 62% Fe2O3, 2 to 3% of quartz and 2 to 3% of clay. The tests conducted by wet magnetic separation show, on the one hand, remarkable results in iron content of 65.11% against 2.46% SiO2 and1.73% Al2O3 and , on the other hand, that the enriched product meets the standards required by metallurgy, releases from processes can be used as an addition in the preparation of cement.

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