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Som R.,NMDC Ltd
Journal of Mines, Metals and Fuels | Year: 2011

The turnover NMDC has surpassed the Rs.10,000 crore mark and profit after tax has crossed Rs.6,000 crore mark, the highest ever in its history. Due to improved production and availability of iron ore from its mines, the company has been able to meet the demand of its long-term customers both in domestic market and export market. The company has procured two new generation drills capable of drilling up to maximum of 800 m even in hard rock formations. NMDC as part of its diversification plan through value addition to its core activity of iron ore mining, is setting up a 3 mtpa green field integrated steel plant at Nagamar of district Bastar in Chattisgarh state. The company has formed its international global investment division, NMDC Global in order to focus expanding its geographical footprint around the world and augmenting its resource base. NMDC has signed a memorandum of understanding with OJSC Severstal, Russia to jointly set up an integrated steel plant with an initial capacity of 2 million tpa in Karnataka.

Singh R.,Wildlife Institute of India | Krausman P.R.,University of Montana | Pandey P.,Wildlife Institute of India | Qureshi Q.,Wildlife Institute of India | And 3 more authors.
European Journal of Wildlife Research | Year: 2014

Long-term data of large felids is important to understand their reproductive biology and behavior for effective conservation planning. We used camera trap data and direct sightings from 2005 to 2013 to estimate the age of the first parturition of Bengal tigers (Panthera tigris) in a semi-arid habitat in India. We monitored 11 females in the Ranthambhore Tiger Reserve (RTR) from when they were 2-6 months old. The mean age at first reproduction (impregnation leading to cubs) was 51.3 ± (SE) 4.5 months. The tiger population in RTR is an important source population and genetic pool in the western most distribution of tiger. Thus, continuous monitoring of tiger populations is important to develop an understanding of reproductive biology. © 2013 Springer-Verlag Berlin Heidelberg.

Nanda N.K.,NMDC Ltd | Gopalakrishna S.J.,University
Journal of Mines, Metals and Fuels | Year: 2014

The export of acceptable grade iron ore over the last decade and ever increasing demand of good quality iron ore for steel making is contributing for depletion of high grade ore reserves. The national steel policy also projects for raw material requirement (iron ore) in excess of 200 million tonnes beyond 2015. The reduction in threshold value of iron in combination with other factors, drive the iron ore mining industry to explore all possible options for utilization of low/lean grade resources. In this context, an investigation is made to develop suitable process utilize the low grade resources of Sandur area, Karnataka. The sample subjected to study was processed using two alternate flowsheets. The first one aimed to produce concentrates in the form of sinter fines and pellet feed concentrate where the second on for producing exclusively pellet feed concentrate. The feed sample analyzes about 55.5% Fe, 9.5% SiO 2 and about 6.3% Al2O3. The first process produced concentrate in the form of sinter fines with 64.4% Fe and 33.7% yield and the pellet fred concentrate analyze 63.54% Fe with 22.47% yield. The combine concentrate analyze 64.04% Fe, 3.85% SiO2 and 2.14% Al 2O3. The yield of concentrate is 56.17% and Iron recovery of 64.71%. The second process adopted to produce pellet feed grade concentrate resulted in concentrate assaying 65.05% Fe with 63.95% yield and 74.4% Fe recovery. It is evident that these low grade resources are amenable for beneficiation and the resulting concentrates are with the acceptable quality for iron and steel making.

Tripathi P.R.,NMDC Ltd
Journal of Mines, Metals and Fuels | Year: 2010

The iron minerals including magnetite, hematite and goethite market has emerged significantly across the world. The large magnetite deposits of around 3 billion tones which are available in Western Ghats cannot be considered for exploitation by the traditional opencast mining method since the environmental issues cannot be mitigated by adopting opencast mining. Global steel production grew rapidly between 2003-2008 at a CAGR of 6.6% due to the strong demand from China and other countries. It has been expected that steel production may continue to drop in the year 2010 also and may stabilize only after 2011 onwards when world wide economic recovery may stabilize. It is required to examine the steel making process routes for arriving at proper conclusion with regard to requirement of iron ore raw material. The route of blast furnace, basic oxygen furnace (BF-BOF), is producing around 65% of the total crude steel, while 35% of the total production is obtained through EAF and other routes which utilize scrap and other metallics such as DRI and HBI.

Rao G.V.,NMDC Ltd | Sharma S.K.,NMDC Ltd
Transactions of the Indian Institute of Metals | Year: 2016

The National Steel Policy 2005 estimated domestic steel production of 110 MTPA by the year 2019–2020, which was revised by the National Steel Policy 2008, envisaging domestic steel production of the country to be 180 MTPA by 2019–2020. About 2.5 tonnes of ROM iron ore or 1.7–2.0 tonnes of processed iron ore is required for one tonne of steel production. To meet the projected steel production of 180 MTPA by 2019–2020, the iron ore requirement have to be in the order of 500 MTPA which includes long term projected export contracts of around 100 MT. Raw materials are crucial in determining the competitive growth of steel industry as this is an input-intensive extractive industry. Situation calls for proportionate development expansion in adequate raw material supply to meet the demand of Indian steel Industry. India is almost completely self sufficient with regard to iron ore but with future steel production envisaged, an adverse impact on the reserves, position is rather imminent. The existing reserves of hematite (averaging around 63 % Fe) are the only source of iron ore and as such, these reserves may not last beyond 25–30 years at the present rate of consumption. Hence, to meet the future and projected requirement, additional domestic resources have to be created. The ores and minerals are site specific, non-renewable and finite. It is a challenging task for iron ore producers to meet the demand as per the national steel policy. In order to meet the demand, the iron ore producers has to face challenges like increasing the resource base, increasing production and productivity, utilisation of low grade iron ores, beneficiation of low grade fines and slimes, overcoming the infrastructure bottlenecks like roads, railways, ports, power, capital and water, human resource, handling, storage and utilisation of slimes/tails, encouragement for R&D activities, adopting environmental friendly measures and land acquisition for setting up new plants. In this paper all the above aspects are discussed thoroughly. © 2015, The Indian Institute of Metals - IIM.

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