Evaluation of the prospects of comprehensive development of mineral resources in Belozersky iron-ore region

2014 ◽  
pp. 497-502
Keyword(s):  
Iron Ore ◽  
Mineral Resources ◽  
Comprehensive Development

scholarly journals Conceptual basis of mining intensification by the geomechanical factor

2019 ◽  
Vol 109 ◽  
pp. 00089
Author(s):  
Serhii Skipochka
Keyword(s):  
Experimental Research ◽  
Iron Ore ◽  
Mineral Resources ◽  
Fixed Costs ◽  
Conceptual Basis ◽  
Mining Operations ◽  
Materials Analysis ◽  
Analysis And Synthesis ◽  
Protective Structures ◽  
Negative Phenomena

The goal of the work was to develop a concept of intensification of mining operations, taking into account geomechanical processes occurring in the “rock massif – mining workings – support and protective structures” system. The article is the result of theoretical and experimental research materials analysis and synthesis, carried out for the conditions of coal, non-metallic and iron-ore mines. Positive and negative geomechanical processes and phenomena, occurring during intensification of mining operations, have been substantiated. A set of technical and technological solutions to eliminate the negative phenomena associated with high mining rates development of mineral resources has been proposed. Recommendations, presented in this article, will significantly reduce the conditionally fixed costs of mining production and improve miner’s safety.

scholarly journals Influence of iron ore concentrate on the characteristics of sintering and reduction of sinter

2020 ◽  
pp. 24-24
Author(s):  
H. Guo ◽  
F.-M. Shen ◽  
X. Jiang ◽  
D.-W. Xiang ◽  
H.-Y. Zheng
Keyword(s):  
Liquid Phase ◽  
Calcium Silicate ◽  
Iron Ore ◽  
Raw Materials ◽  
Mineral Resources ◽  
Integral Form ◽  
Sio2 Content ◽  
Calcium Ferrite ◽  
Iron Ore Sintering ◽  
Bonding Phase

As the main iron ore importing country for China, the abundant mineral resources of Australian are the primary raw materials for the sintering production. To better understand the properties of different iron ore from Australia and then guide the sintering production, this study selected four types ore from Australian and one type ore from domestic, and their properties were investigated under different condition. The experiment of single iron ore sintering was studied to examine the influence of different iron ore on metallurgical properties of sinter. From this study, the following results were obtained: GG showed poor fluidity and higher assimilability temperature, but the bonding phase strength was the highest; YD showed better fluidity and lower assimilability temperature, whereas SJY (domestic ore) showed better fluidity and higher bonding phase strength, lower assimilability temperature. The influence mechanism of iron ore on the fluidity was further analyzed by using SEM and ion theory of slag. With the increase SiO2 content of iron ore, the fluidity index increased, the main reason was that the amount of liquid phase increased and melting point decreased during sintering. However, an excessive amount of SiO2 caused the decrease of fluidity index of iron ore, the main reason was that the fluidity of the liquid phase itself decreased and secondary hematite appeared. In the case of the SiO2 content of iron ore was higher, the main bonding phase was calcium silicate. With the decrease of SiO2 content, the calcium silicate transformed into calcium ferrite. This main reason was that the Gibbs free energy of calcium ferrite and dicalcium ferrite (2CaO?SiO2) was higher than that of calcium silicate in the temperature ranges of 400-1600 K. The reduction degree of YD was the highest in all the cases and that of GG was the lowest. Activation energies of 5.39, 3.14, 3.51, 4.47 and 2.92 kJ/mol were obtained for the reduction of GG, PB, BH, SJY, and YD, respectively. In all the cases, the reaction corresponded to the model function of F1(?), and the integral form was -ln(1-?)=kt. Through this investigation, it could be concluded that the most appropriate ore category for sinter pot was YD.

Application of Grey Correlation Analysis in the Priority Sequence of Mineral Resources Development

2014 ◽  
Vol 1010-1012 ◽  
pp. 1391-1398
Author(s):  
Bo Lv ◽  
Guang Qi Wang
Keyword(s):  
Correlation Analysis ◽  
Evaluation System ◽  
Iron Ore ◽  
Mineral Resources ◽  
Economic Conditions ◽  
Grey Correlation ◽  
Mineral Development ◽  
Grey Correlation Analysis ◽  
The Empirical Analysis ◽  
Resources Development

Firstly, the evaluation system of the priority sequence of mineral resources development was constructed from five aspects as mineral resources endowment, market conditions, technical conditions, social and economic conditions and environmental protection conditions. Then, the priority sequence model of mineral resources development based on grey correlation analysis was proposed. Further, taken the mineral resources in Hebei province as an example, the empirical analysis of the above model was made. Results show that the suitability of the province's mineral development from big to small is, in order, molybdenum ore, cement-used limestone, iron ore, gold ore, silver ore, coal, and etc. The algorithm is not only simple and intuitive, but also improves the efficiency and accuracy of the prioritize division of mineral resource development.

scholarly journals Art. XXV.—Mineral Resources of Southern India. No. 7. Corundum, Ruby, and Garnet Localities

1843 ◽  
Vol 7 (14) ◽  
pp. 219-225
Author(s):  
Newbold
Keyword(s):  
Iron Ore ◽  
Mineral Resources ◽  
Detailed Account ◽  
Southern India ◽  
Component Part ◽  
Peninsular India ◽  
The Matrix

Comparative Remarks on the Geognostic Position of the Corundum in Europe and India.—As I am not aware of any detailed account having been published regarding the geognostic position of the corundum in Peninsular India, and since the rocks with which it is associated in the particular locality which I first visited differ from those in which it has been stated to occur in Europe and Southern India, I am induced to preface this paper with the following remarks. Professor Thomson (Outlines of Mineralogy, vol. i., p. 213) informs us that “the corundum occurs in imbedded crystals in a rock which consists, according to Count Bournon, of indianite, and contains felspar, fibrolite, several varieties of augite, and also octohedral iron ore; the hair-brown or reddish-brown varieties are called adamantine spar. They occur with fibrolite and octohedral iron ore in a sort of granite containing no quartz.” And again (p. 256) he states, that “fibrolite is a mineral found accompanying crystals of corundum in the Carnatic, and that it is a component part of the granite, which is the matrix of the corundum of China.” Professor Jameson, in his geognosy of Peninsular India,(Ed.Cab.Lib., No.VIII., p.349–50,) gives a summary of what is known regarding the corundum of Southern India, and states that it occurs embedded in granite and sienite in the district of Salem, in the Madras Presidency, among the mountains of the Carnatic, and in other parts of the Peninsula, associated with cleavelandite, indianite, and fibrolite. Now in the locality I am about to describe, it was found to occur in decomposed beds of a talcose slate, to which gneiss is subordinate, associated with nodules of indurated talc, and of a poor quartzy iron ore: asbestus, chlorite, actinolite, and schorl were found embedded in the talcose slate.

Single-Pour/Single Pass Loading: An Innovative Concept for a New Generation of Ore Carriers

2011 ◽  
Author(s):  
Ricardo B. Portella ◽  
Luiza F. Andrade ◽  
Tomazo Garzia Neto ◽  
Nelson Coelho
Keyword(s):  
Iron Ore ◽  
Initial Point ◽  
Mineral Resources ◽  
Specific Class ◽  
Single Pass ◽  
Bulk Carriers ◽  
The World ◽  
Main Class ◽  
Port Congestion ◽  
New Generation

Bulk Carriers have been developed since 1950 to carry large quantities of non-packed commodities such as grains, coal and iron ore. Nowadays, there are some 5,000 bulk carriers around the world and this number points to some concerns that affect owners of these types of ship and ports. One of these problems is the big waiting time at the ports that reaches 12% of the global fleet around the world at any given moment. At Brazilian iron ore ports the time waiting average was of 6–8 days during 2006–2008. A concrete example is the VALE operation that responds from mineral resources exploration to mineral resources delivery, passing through mines, railroads, seaport terminals and shipping business, forming a logistic chain that can not be interrupted by the expected growth in trade and consequent port congestion. In view of this, PROJEMAR and VALE faced the challenge of designing ore carriers in such a way that it would not interfere with the logistics chain by delaying other ships at the loading or discharge terminal. As the cargo operation is taken as the initial point of the design conception, the expected final product is a ship able to safely take loading rates as high as 16,000 tons of ore per hour, with each hold loaded in one pour and the ship fully loaded in one pass, resulting in fewer pours into the holds of the ore carrier, faster loading operations and, consequently, a significant economy for the ship owner and for the port. The amount of extra steel needed over conventional designs: less than one percent. The fundamental idea of this new concept, which PROJEMAR calls “single-pour, single-pass” design, is a method of ballast control that is synchronized with the cargo loading, scientifically deballasting the ship during loading in a way that balances the forces induced by the incoming cargo. Potential hull loading stress problems can occur due to the manner in which ore cargoes are loaded and due to the amount of cargo which is loaded in an individual hold. To avoid the creation of any unacceptable stresses in the ship’s structure, loading studies considering the planning of cargo loading and discharging operations, maximum allowable and minimum required mass of cargo for each hold and for adjacent holds as a function of the draught at mid-hold position in form of hold mass curves, calculations of still water shear forces and still water bending moments for each port loading condition and structural analysis are required to be developed on the early design stages. This ship loading concept is creating a new generation of ore carriers in such a way that the main class societies are nowadays developing new specific class notation dedicated to these ships. The purpose of this paper is to present the “single-pour, single pass” concept development and how it has been applied to the design of the new 400,000 DWT ore carriers that are being built for VALE in Chinese and Korean shipyards, and to the 80,100 DWT Bauxite Carrier that are being built for LOG-IN in Brazil. The “single-pour, single pass” concept was also partially considered on the design of 12 VLCCs that are being converted to VLOCs for VALE in China with PROJEMAR’s design.

I.—Recent Iron-ore Developments in the United Kingdom

1919 ◽  
Vol 6 (9) ◽  
pp. 387-397 ◽  
Author(s):  
F. H. Hatch
Keyword(s):  
United Kingdom ◽  
Iron Ore ◽  
Raw Materials ◽  
Mineral Resources ◽  
Industrial Growth ◽  
The United Kingdom

Whilst the basis of the prosperity of a country is admittedly agriculture, its industrial growth is founded on mineral resources, and its participation in the world's markets is chiefly dependent on the extent to which these raw materials can be applied to home manufactures.

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