News
2002 Archive
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2002
SME Annual Meeting
& Exhibit
Phoenix,
February 28 - March 1
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http://www.smenet.org/meetings/02recap.cfm
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Mike
Battersby presented a paper on the commissioning of IMF 30s at K
&
S Sigmundshall.
ABSTRACT
Pneumatic flotation is
rapidly becoming accepted in the main
stream of flotation techniques. Imhoflot is a pneumatic flotation
process that in recent years has undergone progressive development. It
combines short flotation times with excellent selectivity by employing
intense pre-aeration and dispersion. K+S GmbH (K+S), Germany, has
installed a complete Imhoflot flotation plant at its Sigmundshall
plant. The plant treats hard salt consisting of sylvine, halite,
anhydrite and kieserite. The reason for selection was that Imhoflot
achieves the required grades of plus 60 weight percent K2O whilst
offering lower operating costs than conventional flotation
installations.
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New
Technology
PSS
Filtration Developments
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MMS
are entering the broad process market for filtration
equipment with the latest PSS development. The Steel Belt Filter (SBF)
is an innovative use of steel mesh weaves, obviating the need for
polymer cloths.
In
addition to the high capacity, long life benefits of
stainless steel media the SBF has a range of unique design features to
beat the competiton in particulates and sludge filtration.Compressed
air driven, self induced vacuum, and optional overband press sections
provide versatility while keeping costs low despite high performance.
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Applications
SBF
designs have been tested at pilot scale for industrial minerals (gypsum
etc), iron ores, coal, mineral concentrates and tailings. Full scale
units with 9m2 active area are currently in operation for municipal
sewage sludge. Performance and cost objectives have been surpassed.
Installations
for fine coal production are currently in the making.
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Installation
and Commissioning of Rotaspiral
Fine Screens for Berzelius
Berzelius
Stollberg placed an order for two RS12 Rotaspirals
in November 2001. The units were recently commissioned for
classification of granulated slag from the QSL lead furnace. The
Rotaspirals remove fines below 300 microns, and also dewater the
oversize.
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RESULTS
FROM OPERATION
The Rotaspirals receive a slurry feed from a quench sump using a
vertical centrifugal pump and an automated mobile gantry. More than 80%
screening efficiency is achieved. Discharge of oversize to a conveyor
belt is managed by use of a drain section and compressed air for screen
drying.
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Rotaspirals
were developed to provide economic fine screening using precision
stainless steel mesh cloths, with a unique tension system. The rotating
drum frame ensures that fresh cloth is presented to the feed slurry. An
internal spiral and high pressure sprays provide fluidisation of the
screen bed. Sprays and air jets are also used for reverse cleaning.
Maintenance and power costs are extremely low.
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Rotaspirals
were
designed by PSS in
South Africa to address high capacity problematic fine screening
applications. Typically, mixed gravity particulates challenge hydraulic
classifiers because of the misplacement of heavy fine particles, and
light coarse particles leading to poor efficiency. High frequency
vibrating screens can be more accurate, but tend to be noisy, require
high maintenance and power, and performance deteriorates with wear.
PSS
have installed the Rotaspiral in South Africa for removing fine
chromite from platinum mill circuits.
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John
Griffiths AM presented the awards.
Hydrodynamic
test model of G Cell at Cardiff University.
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MMS
receive Smart Wales awards for
G-Cell R&D
Smart
Wales awards were presented at Llangoed Hall, Powys, Wales on March 11
2002 by John Griffiths AM, Deputy Economic Development Minister. The
occasion was hosted by Lucy Cohen of HTV.
MMS
received the award and funding to pursue R&D at Cardiff
University
to commercialise the G Cell. The pneumatic flotation concept is being
tested by construction of a working model, and is intended to increase
speed of separation compared with conventional technologies. The design
is an advanced development of MMS Imhoflot flotation equipment.
Further
information on G
Cell technology.
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Links
Further
information on Smart Wales awards can be found at
www.wales.gov.uk
(
http://www.wales.gov.uk/subitradeindustry/content/grantsforbusiness/innovation-e.htm)
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Delivery
and Construction of IMF 45s in Chile
(General
Information Release May 2002) |
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Maelgwyn
MS and joint venture partners Ingenieria de Minerales (IDM) of
Antofogasta are well advanced in the supply and installation of
Imhoflot equipment for the CMH iron ore concentrator in Huasco, Chile.
The twin stream flotation plant incorporating six IMF 45 cells will
treat 600 t/h of magnetic separator concentrates for removal of
silicates.
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Test
work indicated that Imhoflot technology was the most successful option
to achieve final SiO2 levels of less than 1,5%.Commissioning is
scheduled for July 2002. Compania Minera Huasco (CMH) is a company
owned by Compania Minera del Pacifico SA (CMP a 100% subsidiary of CAP
SA) and MC Inversiones (a Mitsubishi group subsidiary).
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Link
:http://www.cap.cl
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Construction
update. IMF 45s in Chile
(General
Information Release June 2002) |
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Ingenieria
de Minerales (IDM) of Antofogasta have almost completed
installation of Imhoflot equipment for the CMH iron ore concentrator in
Huasco, Chile. The twin stream flotation plant incorporating six IMF 45
cells will treat 600 t/h of magnetic separator concentrates for removal
of silicates.
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Test
work indicated that Imhoflot technology was the most successful option
to achieve final SiO2 levels of less than 1,5%.Commissioning is
scheduled for July 2002. Compania Minera Huasco (CMH) is a company
owned by Compania Minera del Pacifico SA (CMP a 100% subsidiary of CAP
SA) and MC Inversiones (a Mitsubishi group subsidiary).
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Link
:http://www.cap.cl
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Construction
of G-Cell in South Africa
(General
Information Release July 2002) |
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MMS
have constructed a 2.2m diameter stainless steel G-Cell with feed
capacity of 300m3/h. Initial process commissioning and testing will
take place at an Ingwe Coal Corporation site near Koornfontein, South
Africa.
G-Cell
technology has the potential to provide efficient mineral separation
with minimal process residence times. Operating and capital costs of
flotation will be considerably reduced.
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