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Keywords: manganese
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Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, April 30–May 3, 2012
Paper Number: OTC-22938-MS
... Paper On 13 March 1874 the crew of the British research vessel HMS Challenger, on thefirst great oceanographic expedition of modern times, hauled in from a depth of15,600 feet in the Pacific Ocean a trawl containing the first known deposits ofseafloor manganese nodules. We can but imagine...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 4–7, 1998
Paper Number: OTC-8899-MS
... asset and portfolio management recovery application operation waste material experiment disposal byproduct scenario mining operation manganese dioxide manganese crust tonnage cost structure project valuation manganese byproduct wiltshire filler manganese ocean mining operation...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 3–6, 1993
Paper Number: OTC-7103-MS
... could eventually be exploited. They show good to very good metal assays: up to 30% manganese, 10% iron, 1.5% nickel, 1.2% copper, 0.2% cobalt and varying amounts of other elements. The potato-shaped nodules cover large parts of the deep sea floor. Abun- dance ranges between 5 and 25 kg/m2, and occasion...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 3–6, 1993
Paper Number: OTC-7101-MS
... contribution metals & mining metal market nodule deposit manganese market economy country nickel otc 7101 producer world production cis scenario operation consumption ore deep sea mining cobalt OTC 7101 New Scenarios of the World Metal Markets and Contribution From Deep...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 7–10, 1990
Paper Number: OTC-6216-MS
... chemistry, changes to the electrode chemis- try that would promote acicular ferrite can be made. A carbon monoxide reaction was found by Ibara et al. (3) to control the weld metal manganese, silicon, carbon and oxygen in wet welds made with E60l3 proprietary electrodes down to a depth of 160 feet...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, April 27–30, 1987
Paper Number: OTC-5388-MS
... reactions. Christensen et. al (7-10) have shown that with increasing pressure or depth that weld metal manganese and silicon substantially decreased. The weld metal manganese experienced a 0.3 wt. pct. decrease from the surface composition at 30 bars (1000 ft Weld metal silicon decreased 0.10 wt. pct...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 2–5, 1983
Paper Number: OTC-4599-MS
... CONSUMABLES FOR THE CONSTRUCTION OF OFFSHORE PRODUCTION PLATFORMS OTC 4599 The Systematic Development of a new range of SMA electrodes for Critical Applications RECENT DEVELOPMENTS IN WELDING CONSUMABLES FOR THE OFFSHORE SECTOR 3 (i) The effects of manganese additions on toughness have previously been...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, April 30–May 3, 1979
Paper Number: OTC-3509-MS
... inhibition ksi ssc resistance requirement oilfield chemistry h2s management steel survival stress resistance manganese experimental steel quench system strength strength level OTC 3509 THE DEVELOPMENT OF HIGH STRENGTH CASING STEELS WITH IMPROVED HYDROGEN SULFIDE CRACKING RESISTANCE FOR SOUR...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, April 30–May 3, 1979
Paper Number: OTC-3454-MS
... a computer model for cost estimation and investment analysis of a "typical" first-generation manganese nodule ocean mining operation. The final report on this program was published in April 1978. Since then, the model has been used to evaluate various financial proposals (i.e. revenue sharing arrangements...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 2–5, 1976
Paper Number: OTC-2666-MS
... content, balanced by an increase in manganese. The properties of these two steel types may be combined in one steel which needs no preheating and is resistant against lamellar tearing. High strength steels with yield points between 400 and 690 N/mm 2 can be used in sections where static stresses...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 4–7, 1975
Paper Number: OTC-2238-MS
... presently attempting to properly organize and to have professionally developed a raw material potential which could become beneficial to them. INTRODUCTION: AN OCEAN MINING SITE? At first glance, an ocean ore body should be rather easily defined, especially in the case of manganese nodules which abound...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, April 28–May 1, 1973
Paper Number: OTC-1757-MS
..., perhaps, 50 m of water, has hardly got its knees wet. However, plans for the winning of manganese nodules from oceanic depths are now well advanced and large capital sums have been committed. The scale of manganese nodule mining and its possible impact on the traditional sources of the metals concerned...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, April 28–May 1, 1973
Paper Number: OTC-1758-MS
... ocean billions of dollars' of profit in a short while. There were others who claimed that land mining was a thing of the past and the future of all nickel, copper, and manganese mining was in the sea (1) (2) (3) (4). None of these extremes are true (5). Today there are very few who adhere to anyone...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, April 21–23, 1970
Paper Number: OTC-1143-MS
... deposit exploitable mineral resource pellet washington island metals & mining south end manganese reservoir characterization manganese-rich pellet sturgeon bay canal wisconsin upstream oil & gas laboratory lake michigan great lake green bay diameter mineral resource...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, April 21–23, 1970
Paper Number: OTC-1195-MS
... oil & gas toughness welding notch toughness thickness special application construction strength grade marine transportation impact test manganese metals & mining steel strake strength steel columbium grade dh requirement application heat treatment electrode...