MINE HOISTS
to the customer's construction site within the next
two years, followed by assembly and
commissioning work, which is scheduled for
completion in 2023.
Within the framework of order processing
SIEMAG TECBERG has already placed orders with
long lead times (motors, frequency inverters,
shafts, etc) and is currently completing the work
to prepare the technical documentation.
In order to expand its service activities and local
presence in Russia, SIEMAG TECBERG also
opened its own branch in Berezniki, Perm Region
in 2019. In addition to the existing branch in
Norilsk, SIEMAG TECBERG's main objective with
this new base is to also efficiently support its
customers in the Urals region – in the form of
future operative deliveries of necessary spare
parts from the Berezniki warehouse as well as
personnel support in the maintenance of the
supplied equipment by qualified SIEMAG
TECBERG personnel.
The company has announced a number of other
important projects recently. In the Polish coal
industry SIEMAG TECBERG Polska is responsible
for the delivery and commissioning of the mine
shaft hoist for the Janina shaft VI of Tauron
Wydobycie SA. The most important part of this
hoisting system is one of the most modern
winders in Poland, equipped with a low speed
synchronous AC motor powered by an
intermediate frequency converter.
CITIC HIC remains China market leader
Luoyang-based CITIC HIC is the leading
manufacturer for designing and manufacturing
mining hoists in China. Since 1958 it has supplied
well over 8,000 of various hoist types. Its singlerope
mine drum hoist accounts for 70% share of
the domestic market and its multirope hoist 80%.
One of the original coal mine hoists supplied in
1958 operated until 2007.
The CITIC range in diameter includes 1.3-7 m
floor-mounted and tower multi-rope friction
hoists; 1.6-7.6 m single/double-shell single-rope
mine drum hoists; 1.6-4 m electric anti-explosion
hoists (winch); 1.6-4 m hydraulic anti-explosion
hoists (winch); and 2.8-5 m sinking
hoists. CITIC told IM it has manufactured over 150
large hoists since 1994, including friction gear or
reel of diameter 4.5 m and above. “CITIC has
accumulated knowledge over many years
experience in designing and manufacturing hoists,
keeping abreast of the latest technology
developments for the international markets and
contributing to several national scientific research
and development projects, such as on large hoist
localisation research, as well as leading technical
advancements of hoist design.”
In the 2000s and 2010s, 100s of hoists have
been supplied in China and for export, including
the largest single rope winding mine hoist inside
China, a 2JK-6×2.5. Others have included a JKM-
4.5×6PIII (max static tension 1,131kN; max static
tension difference 303 kN; max hoisting speed 12
m/s; motor power 4,400kW) for the main shaft of
Nonferrous Donggua Mountain in Tongling
(copper); a JKM-4.5×4PIII (max static tension 990
kN; max static tension difference 210 kN; max
hoisting speed 9.9 m/s; motor power 1,800 kW)
for the Huize lead-zinc mine in Yunnan; and for the
main shaft of Huainan Mining Bureau’s Guqiao
coal mine, a JKMD-5×4PIII (max static tension
1,200 kN; max static tension difference 440 kN;
max hoisting speed 16 m/s; and motor power
5,300 kW). For the main shaft of Zhangji Coal Mine
of Huainan Mining Bureau CITIC supplied a JKMD-
5.7×4PIV (max static tension 1,500 kN; max static
tension difference 440 kN; max hoisting speed 14
m/s; motor power: 3,000 kW×2). For the auxiliary
shaft of Ganshu Hetaoyu coal mine CITIC supplied
a JKMD-6.2x4PIII (max static tension 1,700 kN;
max static tension difference 340 kN; max hoisting
speed 11.3 m/s; and motor power 3,000 kW). For
the main shaft of Zambia Chambishi copper mine,
a JKMD-5.7×4PIII (max static tension 1,530 kN;
max static tension difference 420 kN; max hoisting
speed 13 m/s; motor power: 6,300 kW). For the
main shaft of Shougang Luannan Macheng mine, a
JKM-5.5×6PIV (max static tension 1,824.8 kN; max
static tension difference 575 kN; max hoisting
speed 16.36 m/s; motor power: 5,600 kW×2).
The company adds: “Maintaining the goal of
meeting or exceeding international standards,
CITIC is continuously improving the mechanical,
hydraulic and electric control system, innovating
designs at the same pace as developed countries.
Motors are sourced from domestic and
international suppliers. Hydraulic braking systems
can be sourced from ABB in Sweden and
SIEMAG/SIBRE from Germany as per client's
request. Hoist system ancillary components are
sourced from domestic and international
suppliers, such as for steel wire rope, hoist
containers, loading and uploading devices, steel
wire rope failure detectors, and steel wire rope
changers.”
CITIC’s AC-AC VVVF Electronic Control System
deliveries include a complete JKMD-3.5×4 (III)
1,900 kW AC-AC frequency conversion electronic
control system for the main shaft of ZhengCun
coal mine in cooperation with LuoYangYiAn Ltd
commissioned in 2006. CITIC also supplied a
complete 3,400 kW AC-AC frequency-conversion
electronic control system for the BABAO main
shaft hoist in cooperation with TongHua Mining
(Group) Ltd company and commissioned in 2009.
In 2007, CITIC coordinated with Beijing
Shougang Xingshan Mining Company for the
4,000 kW medium voltage frequency-conversion
electronic control system. The same year it
coordinated with Anhui MaGang LuoHe Mining Co
Ltd for its main shaft’s 4,000 kW medium voltage
frequency conversion technology. Then in
December 2008, CITIC coordinated with Shenhua
Ningxia Coal Industry Group for a JKMD-5.5X4
complete hoist system 2,500kW medium voltage
frequency-conversion used for the secondary
vertical shaft for the coal mine on Maiduo
Mountain.
Finally, CITIC adds: “With increasing energy
demands and coal resources found in deep shafts,
advanced technology is becoming more important.
To meet these requirements for future
mines, CITIC has developed large sinking hoist
technology for >1 km shafts to handle large
Twiflex brakes for US coal mine project
A leading mine hoist and elevator manufacturer located in the Eastern US
required a custom braking solution for a new combination emergency
escape hoist and ventilation package. The escape hoist, positioned above
the mine’s ventilation shaft, is driven by a 200 HP motor, reaches a depth
of 571 m, has a max payload capacity of 680 kg and travels at a speed of
2.413 m/s. In an emergency, when the mine’s large primary hoist is not
accessible, the escape hoist can bring personnel to the surface quickly
utilising the mine’s ventilation shaft. To meet the hoist’s 1.5 second
emergency stopping and parking application requirements, Twiflex
supplied a pair of Model VKSD spring-applied, hydraulically released,
dual-spring caliper brakes acting on a pair of discs shaft-mounted to
either side of the hoist’s cable reel. The braking system was packaged
with a pair of SOBO iQ hydraulic power units and a SOBO iQ control
provided by sister company, Svendborg Brakes. The Twiflex VKSD disc
brake caliper range is available in a standard configuration comprising
dual-spring modules acting on each side of the disc or as a mono-spring
(floating) brake. The minimum disc thickness is 20 mm and the minimum
disc diameter is 1,000 mm. Rated braking force extends from 28 kN to 119
kN. Svendborg Brakes’ industry-leading SOBO iQ braking controller
combines cutting-edge technologies to provide significant flexibility,
safety and durability on mine hoists and conveyors. The controller
features three-state digital modulation and a revolutionary dual-loop PI
control (pressure/speed). The pressure control is based not only on speed
but also on deceleration. Advanced functions such as independent
overspeed monitoring, rollback, gearbox and out-of-band monitoring are
included. The solution was applied at a coal mine in West Virginia and
more installations have since been made at other mining sites.
82 International Mining | JULY/AUGUST 2020