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By M. Schwartz

Hosting copper, gold, oil and liquefied natural gas, the country is an interesting target for miners. However, remote locations in inhospitable, unusual and difficult terrain cause problems. The government has worked to create a Sovereign Wealth Fund to manage government surpluses from minerals and energy but PNG scores very low among many criteria, including land dispute resolution, as revealed by the 2014 Canadian Fraser Institute in its survey of senior mining personnel.

May 1, 2015

By G. Richards

Mines are facing fresh challenges over how they deal with the huge quantities of water consumed. industry analyst Frost and Sullivan, demand for treatment equipment and services alone is expected to be worth US$3.6bn by 2016, while a report by consultancy Bluefield Research estimates that the total mine water market - which includes water infrastructure such as reservoirs, pipelines and dewatering systems as well as the equipment and services - will be worth US$17bn by the end of 2019. Methods of water decontamination are described.

May 1, 2015

By C Selcuk

This item considers the work of the CleanMine consortium on the removal of hard scale from valves via the combined use of controlled acoustic cavitation with guided wave propagation.

Jun 1, 2015

By T. Bennett

Geothermal energy has the potential to provide 20% of the UK's annual average electricity generation capacity requirement. This article discusses the costs and potential benefits.

Jun 1, 2015

By Schwartz M.

Madagascar's democratic election has led to a return to its position as a preferred trade partner with the USA and a priority market with Canada. Michael Schwartz takes a look at two key mining projects in this recently reinvigorated country

Feb 1, 2015

By P. J. O'Connor, V. Gallagher

The addendum, to the paper published in Trans. IMM B, vol.103, 1994, p.B175-B187, acknowledges data from Celtic Gold plc at Navan and apologises for the omission

Jun 18, 1905

By P. J. O'Connor, V. Gallagher

examined analytically in relation to the ratio of the

Dec 1, 1994

By M. Schwartz

Mining in Argentina is diverse in terms of the number of minerals extracted from the country, but also in terms of the varied approaches and attitudes of mining investors and their trust in the country's individual provinces. Laws are discussed, investment attractiveness and taxation.

Jun 1, 2015

By Asfa-Wossen L.

Davy saw science to be the ultimate truth. He loved the utility and permanence of it and the feeling of progression. He was a bold chemist and an inventor, but he thought like a writer

Feb 1, 2015

By Blatchford A. S.

Discussion at the North of England Institute of Mining and Mechanical Engineers' general meeting held in Newcastle-upon-Tyne, 3rd June 1916, on the paper published in Trans. I.Min.E., vol.LI, 1916, p.361-377, comprised written comments by Ashworth J. on the practicality of applying quenching materials to a dust cloud ahead of the explosion flame

Dec 1, 1916

By P. Danson, D. A. White, S. Bashir

Composite ion exchange materials made of SnO2, TiO2 and MnO2 can be used to remove radioactive contaminants from nuclear waste streams. In several cases their selectivity and capacity are enhanced by mixing hydrous silica into the matrix. MnO2-SiO2 materials are especially useful for a number of reasons, such as their selection of heavy elements over caesium. Distribution constants and determinations of exchange capacities show that in many instances the properties of the composites are better than those of the oxides alone, while the presence of a chelating agent has been found to reduce the uptake of nuclides considerably. Methods are being developed for the bulk manufacture of the materials. Further work on sorption mechanisms is required to explain anomalous results, particularly the variation in exchange capacity for different elements and the ability of the oxides to sorb colloidal material in alkaline solution.

Jan 8, 1992

For the convenience of those who are unfamilar with thermodynamics, the following brief description and explanation is given of the thermodynamical terms and methods used in this book. It must, however, be strongly emphasized that the account given below is not an introduction to chemical thermodynamics; its sole purpose is to give the reader a rough understanding of the methods used in the earlier chapters. For further information, reference must be made to the standard textbooks on chemical thermodynamics by Glasstone.

Jan 1, 1953

By J. R. Budden, P. A. Spencer, J. Barrett

The initially produced arsenic (III) is very toxic to the unconditioned culture but the mixed culture has the capacity to oxidise it to arsenic (V) in the presence of iron (III). It was possible to build up the resistance of the culture through progressive sub-culturing on arseno-pyrite until it could tolerate steady-state concentrations of 30 mM arsenic (III) and 200 mM arsenic (V). With some samples tested in the continuous systems the final arsenic concentrations reached 330 mM. It proved possible to use the laboratory batch data to establish the optimum operating conditions for continuous test systems with capacities of up to 32 m3. Data on the residence time, oxygen uptake rates and gold extraction from the bio-oxidised residues could then be confirmed by continuous testing without the need first to use empirical means to determine optimum conditions for continuous bio-oxidation. The data on residence time, oxygen uptake rate, solids density and neutralisation could be used to estimate the capital and operating costs of treating any given tonnage of the concentrate of interest. It was established that the arsenopyrite concentrates can be suitably bio-oxidised to cause the liberation of at least 90% of the gold content. The method is simple to operate and is flexible over a wide range of external conditions

Apr 1, 1991

By G. R. Doughty

It is shown that sodium can be removed very readily from molten aluminium by the use of a beta"-alumina, the more highly conducting form of beta-alumina, provided that the surface of the tube is wetted by a layer of salt. From current/time plots the theoretical amount of sodium removed has been calculated and excellent agreement obtained. The beta"-alumina tubes can be immersed directly in the Al without fracturing if they are pre-heated for a few minutes prior to immersion. According to its stability beta"-alumina should be attacked by molten Al at low Na contents, but in these experiments the salt acted as a protective layer. Magnesium chloride is a relatively cheap salt, whose Mg product can be used within a foundry. The only other product is NaCl, which can be used in-house as a flux or sent for disposal. No polluting gases are used or produced and no drosses created. The time for removal of sodium was quite short, comparable to that for chlorination

Jun 21, 1905

By M. Thompson, B. Coles, M. Hale

The use in regional geochemical reconnaissance of replicate analysis of natural coatings of iron and manganese oxides on the surface of pebbles in stream sediment is described. Pebble coatings were selectively analysed for their relative contents of absorbed trace elements by ablating a small quantity of the coating with a laser beam and sweeping the aerosol obtained into an inductively coupled plasma atomic emission spectrometer. Using this procedure, a geochemical survey in northwest Wales revealed anomalous concentrations of Cu, Mo, As, Zn, Cd, Pb and Co in the pebble coatings of streams draining the mineralised Coed-y-Brenin diorite and the Dolgellau gold belt.

Jan 4, 1992

By G. R. Chaudhury

Many base metals, such as copper, lead and zinc, are commercially extracted by thermal processing of sulphide concentrates. However, owing to the depletion of high grade sulphide ore reserves and to environmental legislation, efforts have been in progress for some years to develop methods for the extraction of metals from lower-grade oxide ores and secondary resources, and there are now examples of commercial-scale operations.

Dec 1, 1995

Further discussion at the North of England Institute of Mining and Mechanical Engineers' general meeting held in Newcastle-upon-Tyne, 3rd June 1916, on the paper published in Trans. I.Min.E., vol.L, 1915, p.179, consisted of the author's written response to Mr. Hare's comments at the April meeting

Dec 1, 1916

Discussion at the The Midland Counties Institution of Engineers' general meeting, held in Nottingham on 6th May 1916, included contributions by Bramall E., Bragge G.S. and Watkins W.G. regarding possible measures for reducing energy consumption in coal-winding and pumping by centralising engines, using exhaust steam, improving coal quality and size uniformity, or mechanical stoking

Dec 1, 1916

By T. D. Jones

Describes the facilities in South Wales for routine control and research work on all the various aspects of the dust problem. Considers mining and medical research, inspection and control, education, and plans for the future.

Jan 1, 1947

By Black J.

Further discussion at the Mining Institute of Scotland's general meeting held in Edinburgh, 12 February 1916, with D.W. Mowat, president, in the chair, of a paper published in Trans. Inst. Min. Engrs., 1915, vol. L, p.449 included written contributions by Dron R.W., Riddell W., Hamilton J. and Mowat D.W.

Dec 1, 1916