170 research outputs found
Studies in the Amenability of Kolhapur Bauxite to Bayer's Process-Parts I and 11
DETERMINATION of the digestibility pattern of the bauxite samples is the most important step towards the design of an integrated alumina plant principally based on Bayer's process. Of all the aluminous minerals, the trihydrate gibbsite is the most amenable to Caustic digestion, and diaspore the hardest to treat. Altekar and Mathadt proceeded to determine the mineralogical set-up of the Kolhapur bauxite. The samples were obtained by the senior
author from seventeen different pits dug to an average
depth of 17' in a 30-acre plateau on top of a 3,000' high hill near Udgcri. The deposit has been since estimated at 3'5 million tons of bauxite. The findings of the author were that the principal and predominant mineral of alum-inium is gibbsite and it was therefore predicted that its response to caustic treatment would be quite favourable. Thic paper records the results of detailed investigations concerning the digestion of the bauxit
Beneficiation of Garnets
GARNETS are found in the mica-bearing pegmatites of Nellore district in AndhraPradesh and similar pegmatites of Bihar-Rajasthan.Beach sands also contain some apprec-iable amounts of garnet. Garnets are used as abrasives and as decoration stones. When the garnet becomes completely transparent it is used as precious stone
D.T.A. Studies
ORES and minerals are wasting assets which occur in
nature and their use as raw materials in different mineral based industries needs very systematic and scientific approach in rationalising these resources
for the development of the country's economy so that
they can be utilized for as long a period as possible
to the best of their advantage in terms of quality
and quantity with minimum or no wastage whatsoever.
This rational utilization of the mineral resources
can very well be achieved by adopting the latest ore-beneficiation methods. These methods are well developed
in recent times and can be very much applicable if the beneficiation problems of the low grade ores and minerals are properly understood. A proper understanding of these problems related to them can be achieved by knowing
fully well their basic and most important characteristics
like physical properties, chemical analysis and mineral-ogical nature which would actually reflect the nature of formation of these ores and mineral deposits in a broad manner
Beneficiation of Barytes
BARYTES is an important industrial mineral required by
the paint and pigment manufacture, paper, plastic, linoleum, oil cloth manufacture etc., and also in the
oil well drillings; large deposits of barytes are being mined in Cudapah Dist. of Andhra Pradesh. Recently some more deposits are located in Madhya Pradesh
Non-Ferrous Base-Metals Group Minerals
INDIA is far behind to some of the advanced countries in respect of the production and consumption of base metals which are the true indicators of the industrial activity of any country. In fact no mineable reserves of some base metals like tin etc. are present. The chief base metal
minerals in India where some mining and metallurgical
activity is seen and being developed are confined to copper, lead, zinc and aluminium.The production of copper in India hardly meets internal demand. The same is the case with lead and zinc metals. It is only in recent years
that concerted efforts are continued for exploration
and exploitation of new copper, lead and zinc deposits in the country and setting up new copper and zinc smelters for smelting of the indigenous as well as imported concen-trates. But in the case of aluminium industry, it can be considered self-sufficient in respect of the bauxite rese-rves for meeting the requirements of expanding indigenous
industry as well as for export market
Strategic and Fertilizer Minerals Group
STRATEGIC minerals may be defined as those which are highly essential for the defence of a country and in
which the indigenous resources are presently insuffi-
cient to meet the domestic demands. With the present knowledge of resources and reserves position, more
than two dozen minerals have been included as strate-
gic for India. Of these tungsten ores, and molybdenite
are dealt with in detail
Benefication Studies on Iron Ores of Bihar
A mixed sample of flue dust mostly of -20 mesh size and weighing 50 kgs, from the blast furnaces of TISCO was received to study whether its impurities can be reduced
to a reasonable level by simple ore-dressing methods, so that it can be used in their sinter mix along with the
iron ore fine
Beneficiation of Beach Sands
THE beach sands from Tainil Nadu, Kerala and Maharastra coasts contain a variety of minerals used for different industries. Monazite is the most important radio-active mineral that is recovered from the beach sands. Other minerals are rutile,garnet, sillimanite, ilmenite, quartz etc
Pyrite and Pyrrhotite
Pyrite and pyrrhotite are the only minerals other than native sulphur used in the manufacture of sulphuric
acid. Pyrite is known to occur separately in Amjhore
area of Bihar and as associated mineral in the complex base metal sulphides of copper, lead and zinc and also
in the Kolar gold deposits. Pyrrhotite is known to occur in association with pyrite in Saladipura area, Rajasthan and also in the other sulphide deposits.
Both pyrite and pyrrhotite were usually beneficiated by gravity methods when they are liberated at a coarse size, or by flotation when the grain size was fine. Depending upon the size of liberation either heavy media separation alone or followed by Jigging/Tabling were employed for the lumpy and coarse grained sulphides.
Pyrite samples from Amjhore and Kolar areas were tested
in NML. Amjhore Pyrites were lumpy in nature and hence heavy media separation and jigging were employed while tabling was employed to recover the sulphides from the fines. Pyrite samples from kolar and Nilgiris were beneficiated by Tabling and flotation methods. Pyrite Pyrrhotites from Saladipura were beneficiated by flotation only
Beneficiation of Copper and Nickel Ores
COPPER ores in India are of low grade like any other deposits elsewhere in the other parts of the world. Chalcopyrite is the most common and usual copper mineral; the other minerals have been chalcocite, covellite, bornite, which are all copper and copper-iron sulphides
while enargite, tetrahedride and tenantite are copper, antimony/arsenic sulphides. Apart from these, oxide and carbonate ores of copper such as cuprite, tenorite, mala-chite and azurite also occur in minor quantities. The copper minerals are concentrated by flotation process usually employing xanthates as collectors and pine oil
as frother. Most of the deposits are of complex nature
and needed complicated processes for their beneficiation
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