HIGH PROFILE
Chuquicamata. Other deliveries have included
two CSM600 VSMs for a Russian gold mine. “A
high proportion of new base metals resources
are relatively fine grained which ultimately
requires grinding below 45 microns. As
grinding gets finer the surface area increases
exponentially as does the power requirement.
The traditional tumbling mills are inefficient
when compared with stirred media mills which
have become the preferred option for regrind
and fine grinding applications. There are only a
few manufacturers producing stirred media
mills in either vertical or horizontal designs.”
Above the CSM1200, CITIC also offers the huge
CSM1500 (1,500 kW) and CSM2500 (2,500 kW) and
even has a CSM4000 design under development.
Through a historical co-operation with KHD for
the manufacture of High Pressure Grinding Rolls
(HPGR) CITIC HIC now designs and manufactures
its own full range of HPGRs to suit the cement and
mineral processing industries. With over 170 units
sold CITIC HIC says it has much experience in
supplying world class HPGR’s to the industry. CITIC
HIC has delivered as an example HPGRs of model
GM 55-20 to Fortescue Metals Group which
operate at the Solomon Hub in Western Australia.
The listed offering of HPGRs includes models up to
the GM 240-180 (2 x 3,150 kW) with up to 2,900 t/h
capacity.
The Auto Jaw crusher range
The company also produces the CITIC-HIC AJ (Auto
Jaw) Range of single toggle jaw crushers. These
incorporate the use of a hybrid cylinder (patent
pending) toggle system. “The new design of toggle
system has made the operation and maintenance
of the jaw crusher is simpler and safer than other
jaw crushers currently available in the market. The
traditional tension rod system has been eliminated
and replaced by a hybrid cylinder, the toggle
arrangement not only allows for the equipment to
be easily adjusted. This design also provides tramp
relief for the equipment which adds another level
of protection to the machine and minimises
potential damage to the crusher when tramp
material enters the crushing chamber. An added
advantage of this system, the crusher is able to be
adjusted while the machine is running reducing
which improves the availability and productivity of
the crusher. The toggle system has also been
designed with maintenance in mind, the toggle
system pivots outward to create easy access to the
toggle area for maintenance purposes.”
Primary gyratories
CITIC-HIC’s PXZ Series II Primary Gyratory Crushers
offer a range of crusher sizes to suit the most
demanding of applications in some of the world’s
largest mining project with feed sizes up to 1,300
mm and capacities of up to 8,000 t/h. Combined
with high speed (600 rpm) and a range of eccentric
CITIC HIC has developed a range of special
robots which also have some potential in the
mining market
strokes, high reduction ratios are possible resulting
in higher mill production rates. The PXZ series
utilises the industry standard of hydraulically
controlled setting adjustment & crusher protection
which can be integrated to the customer system or
supplied with a standalone automation package,
ensuring maximum performance & productivity.
The PZX series Primary Gyratory Crusher is
equipped with a heavy duty spider assembly along
with one piece main shaft/head assembly to
accommodate the toughest of applications and
easy maintenance procedures resulting in less
downtime. “Every component of the PXZ Primary
Gyratory Crusher is manufactured within our own
factory ensuring control over product design,
quality, manufacture and assembly. All crushers are
fully assembled in our works and test run prior to
delivery resulting in quicker installation and
commissioning times.” Installations include a
PXZ1200 primary gyratory crusher at the
Luanchuang Molybdenum Project in China and a
PXZ1500 for Vale in Brazil.
Mining hoists
CITIC HIC is also the leading manufacturer for
designing and manufacturing mining hoists in
China. Since 1958 it has supplied well over 7,000 of
various hoist types in which its single-rope mine
drum hoist accounts for 70% share of the domestic
market and its multi-rope 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;
1.6-6 m single/double-shell single-rope mine drum
hoists; 1.6-3.5 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.”
CITIC has exported single-rope mine drum
hoists and multi-rope friction hoists for many
years. In the 1970s, there were 31 foreign
projects (North Korea, Vietnam, Albania and the
DRC) with exported hoist types J-2.0 to JK-3.5
and JKM-2.25×4. In the 1990s, 21hoists were
exported (Bangladesh, Iran, Turkey, Pakistan,
Venezuela, Zambia and Poland) which were of
types JKMD-3.5×4, JKMD-3.25×4, JKMD-2.8×4,
JKM-4×4, 2JK-3.5, JK-3.0, JK-2.0, and JK-1.6.
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-
4.5×6(III)E (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-4.5×4P(III) (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-5×4(III)E (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-
5.7×4(IV)E (max static tension 1,500 kN; max static
tension difference 440 kN; max hoisting speed 14
m/s; motor power: 3,000 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.”
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 volume containers
over 5 m 3 .” CITIC has supplied model JK-
4×3.5/15.5 for the sinking hoist project for China
Coal No 3 Construction Corporation which has been
successfully operating in the 1.5 km deep shaft. IM
MARCH 2020 | International Mining 71