Largest furnace transformers in the world for smelter application destined
for S.A.
Specialist Electrical Engineering Consulting Company Redwing Technologies
(Pty) Ltd, acting on behalf of Tamini Trasformatori of Italy, has achieved
a remarkable result in special transformer orders and sales in Southern
Africa during 2000 and 2001.
Included in these sales is an order from Anglo Platinum for four 56MVA
single-phase transformer units for the new Pietersburg smelter. Delivery of
the transformer units is planned for October 2002, and it is believed that
these will then be the largest single-phase furnace transformers for
smelter application in the world, each unit weighing in the order of 130
ton, with a total order value in excess of 3,5 million Euro.
Other furnace transformers recently already supplied by, or ordered to,
Tamini include four 18MVA and three 22MVA units for Feralloys; 138MVA unit
for Saldanha Steel; three 11MVA for ASA Metals; one 25MVA unit for Dow
Chemicals; four 10MVA units for Zimasco and an additional four 10MVA units
for Anglo Platinum. Further orders are also anticipated during 2002.
This represents a significant regional market share in this business area
for furnace applications.
In most cases Redwing Technologies is also responsible for clearing/
transport to site/full erection of the transformer units and assistance
with commissioning.
The upsurge in orders for the Tamini units, which are designed and
manufactured in Italy, can be attributable to an increased awareness of the
local market situation and requirements coupled with the extensive
technical design, flexibility and cost effectiveness of the Tamini
Trasformatori organisation for Southern African conditions.
Such qualities ensure that these special transformers can be manufactured
and supplied up to the largest power ratings required.
The supply of furnace transformers complements other activities of Redwing
Technologies, which include AC and DC arc-furnace technologies
(representing Concast Standard of Switzerland) and specialised power system
investigations and analyses.
Mimosa Phase III expansion (Zimbabwe)
Redwing Technologies were appointed in November 2001 by SSP Mining
Consultants as project consultants, for the complete underground electrical
reticulation for the new Phase III expansion to the Mimosa Platinum Mine.
Scope of this project includes the initial feasibility design and costing
for budget purposes, detailed design, specification and full project
management through to final commissioning of the underground electrical
supply reticulation (including nine 11kV/550V skid substations), surface
compressor house and vent fans, and electrical supply to the main conveyor
and primary crusher.
Project completion is planned for 3rd quarter 2002.
Konkola Copper Mines (Zambia)
Redwing Technologies have been appointed by KCM to conduct a comprehensive
fault and protection relay coordination study for the complete Nchanga,
Konkola and Nampundwe Mines, together with the Smelter Company.
Scope of this study includes relay coordination for over 1000 circuit
breakers and associated protection relays, with over 30 11 kV incomers to
KCM from the supply authority.
BCL Mine (Botswana)
Redwing Technologies have been appointed to conduct a comprehensive system
study for the complete BCL Plant and Selebi Mine electrical supply.
Scope of this study includes detailed on-site measurements of the power and
harmonic conditions through the 11 kV network, and an analysis of the
capability of the existing BCL 11 kV reticulation to provide adequate
capacity for both existing and predicted future load scenarios, for both
normal and contingency supply operation, and to make recommendations to
improve the security of supply throughout the plant and mine.
A comprehensive fault study and protection relay coordination exercise will
also be conducted for the complete plant and mine recticulation.
The capability of the existing Botswana Power Corporation 220/66/11 kV
supply arrangement to provide an adequate capacity for existing and
predicted future plant and mine loading will also be analysed.
Furnace transformers for Zimasco
(Zimbabwe)
Tamini Trasformatori of Italy, in cooperation with Redwing Technologies,
have received an order for the supply, transport to site, full erection and
commissioning of 4 x 10 MVA single-phase furnace transformers.
Project completion is planned for 2nd quarter 2002.
Anglo Platinum - Waterval Slag
Cleaning furnace transformers
Tamini Trasformatori of Italy, in cooperation with Redwing Technologies,
have received an order for the supply, transport to site, full erection and
commissioning of 4 x 10 MVA single-phase furnace transformers.
Project completion is planned for 3rd quarter 2002.
Sladanha Steel furnace transformer
Tamini Trasformatori of Italy, in cooperation with Redwing Technologies,
have received an order for the supply, transport to site, full erection and
commissioning of a 136 MVA three-phase furnace transformer.
Project completion is planned for 3rd quarter 2002.
Sentrachem furnace transformer
(Newcastle)
Tamini Trasformatori of Italy, in cooperation with Redwing Technologies,
have received an order for the supply, transport to site, full erection and
commissioning of a 25 MVA three-phase furnace transformer.
Project completion is planned for 4th quarter 2002.
Driefontein Consolidated(Gold Fields)
Redwing Technologies have been appointed to conduct a comprehensive system
study incorporating eight shaft main intake substations for the Driefontein
Gold Mine.
The scope of this study includes detailed on-site measurements of the power
and harmonic conditions at each substation supply, an analysis of the
effectiveness of existing power factor correction and harmonic filters
installed, together with recommendations to improve the optimisation of
this equipment and implementation of the proposals.
Project completion is planned for 2nd quarter 2002.
