CONVEYING TECHNOLOGY
mine ore production of 100,000 t / d . The project is also producing over 6,000 t / y of molybdenum . The second phase of the new project to 300,000 t / y will achieve an annual output value of 20 billion yuan , accounting for about 2 % of Tibet ’ s GDP . At the same time , plans are being made for a third phase to 600,000 t / y . In the context of the global new energy revolution wave of copper demand for further growth , Zijin says the project will play a positive role in ensuring China ’ s selfsufficiency in copper .
Siemens supplied the power solution for a 9 km , mainly downhill long distance thyssenkrupp Industrial Solutions 10,000 t / h conveyor at the mine ( consisting of two conveyor flights – CV04 and CV05 ) having 2 x 6,000 kW gearless drives generating 1,023 kNm of torque and giving a nominal speed of 7.5 metres per second at 56 rpm . Severstal iron ore mining division Karelsky Okatysh said on December 27 , 2021 that it is well advanced in implementing the largest project in the history of the operation – it is applying cyclical-flow technology in the mining complex – specifically an IPCC system referred to as the CPT for which the total investment amounts to 11 billion rubles . The expected economic effect in cost savings is two billion rubles a year . In parallel with this , the environmental footprint of the mine will decrease : carbon dioxide emissions will decrease by 9,500 t per year . Also , the project will create 127 new jobs .
PHYSICAL SEPARATION ‘ 22
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INTEGRATION , OPTIMISATION & DESIGN OF MINERAL PROCESSING CIRCUITS ( INTEGRATEDMINPRO ) ‘ 22
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SUSTAINABLE MINERALS ‘ 22
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PROCESS MINERALOGY ‘ 22
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Some 70 Mt of rock mass per year will be the throughput of the IPCC system . Of this , 20 Mt are ore and 50 Mt are overburden . The launch of the complex is scheduled for 2023 . The CPT includes two main crushing and conveying transport complexes for ore and waste overburden , as well as a dry magnetic separation ( SMS ) unit . The rock mass will be transported by dump trucks along optimally short intra-pit routes . Crushed ore and overburden will be lifted to the surface by inclined belt conveyors . From the pit perimeter the ore will go to the transfer and storage warehouse , and the overburden – to the dump . The use of conveyors instead of dump trucks will reduce the cost of transporting the rock mass , as well as reduce emissions of exhaust gases from heavy equipment into the atmosphere .
The CPT equipment is largely being supplied by thyssenkrupp which told IM that the project includes three IPCC crushers – notably one of these is an innovative ERC ® eccentric roll crusher which has a low-wear design and durable components to enhance efficiency . The Karelsky Okatysh ERC has a capacity of 1,000 t / h and will be used for crushing of low grade ore . The high grade ore line comprises a gyratory KB 63-75 semi-mobile plant with related conveyor and stockyard equipment with a capacity of 4000 t / h . Finally , a gyratory KB 63-130 is handling the inpit waste crushing at a capacity of 8,000 t / h ; along with associated conveyor and spreader .
The main equipment arrived at Karelsky Okatysh in 2021 . Components were supplied from Turkey , China and Germany . Due to the transportation of bulky spare parts , the federal highway had to be blocked . The mining company says construction of the complex is proceeding according to the schedule . St Petersburgheadquartered Lenmontag is the general construction contractor for the CPT . “ I would like to note the high professionalism of my colleagues . This year , we have completed a large amount of work : we have completed the construction of an ore warehouse , assembled a conveyor , a stacker , and now it is being commissioned . We also
built the main step-down substation , started the installation of the spreader and preparatory work for the construction of crushing complexes ,” comments Anton Vlasov , the Project Manager of the CPT .
Karelsky Okatysh is one of the leading and modern iron ore mining complexes in Russia . It produces 20 % of Russian iron ore pellets and is located in Karelia in the northwest of Russia . Mining operations have been carried out since 1982 on the basis of the Kostomuksha deposit , which includes ferruginous quartzites , crystalline shales of various compositions and felsites . In March 2007 , mining and processing of iron ore from the Korpangskoye deposit began then in 2008 , the company received a license for exploration and processing of ore reserves at the Yuzhno-Korpangsky block . The main consumer in the domestic market is the Cherepovets Steel Mill , also part of Severstal . The products of Karelsky Okatysh are also exported .
Doppelmayr sees three new projects up and running
Looking at ropeway conveying , Austriaheadquartered Doppelmayr Transport Technology in the past year has seen three of its RopeCon ® system get up and running . In early 2020 , IM reported on how a Doppelmayr RopeCon ® system was to help Aggregate Industries with an innovative backfill solution at its Bardon Hill quarry , in Leicestershire , England , which is one of the largest in the UK , producing over 4 Mt / y of granite aggregate . The high angle conveyor is now complete , and is transporting approximately 1,000 t / h of overburden over a distance of 500 m . Aggregate Industries has developed a quarry extension at this strategically important site , one of the UK ’ s oldest continuously operated quarries , extending mineral production for a further 27 years . During the initial 14 years of production , over 12 Mm 3 of overburden must be progressively extracted . This will be processed and conveyed for emplacement within the existing exhausted quarry to a depth of 125 m . A road haulage solution was not permitted due to the generation of considerable CO2 emissions , while a conventional conveyor system would have been very costly due to the length and number of transfer points required to navigate the existing quarry haul roads .
The proven RopeCon system , a combination of ropeway technology and conventional conveying technology , spans 850 m across the entire pit with track ropes . The belt , which transports the overburden , moves on these steel wire track ropes and the material can be transferred onto a second belt directly in the rope span . This creates a second discharge point at a distance of approximately 100 m from the first discharge point . Depending on where the material is
56 International Mining | FEBRUARY 2022