COMMINUTION AND CRUSHING capacity of 200 t per day . Eliminating the original two ball mills that had a high rate of energy consumption has resulted in an energy saving of 30 %,” says Zhang Jiankang , Grinding Plant Technician at the Miaogou Iron Mine .
The Vertimill VTM1500 also has a significantly lower grinding media consumption . The media consumption for processing the raw ore dropped from 0.8 kg / t to 0.3 kg / t , equivalent to a 60 % reduction . With an annual output of 800,000 t of iron concentrate , the savings in grinding media alone can amount to RMB2.4 million per year .
After more than seven months in operation , Metso ’ s field service engineers along with the customer carried out an inspection of the Vertimill . The wear pattern of the end liner was good and allowed for at least three more months of use . Thanks to the extremely long wear life of Metso ’ s screw liners , the mill ’ s availability reaches 98 % and everyday maintenance costs are reduced .
“ Metso possesses a high-efficiency automation system , and the mill can be managed by a single operator now . In addition , unlike the noisy ball mills , the VTM1500 operates much quieter ,” says Zhang Jiankang . “ Metso ’ s VTM1500 has demonstrated very obvious advantages in terms of energy consumption reduction , labor saving and working environment improvement .”
Elsewhere , thyssenkrupp and EIRICH have joined forces in an ore processing partnership and believe that joint development of the proven EIRICH TowerMills will permit significantly higher throughput rates for fine and ultrafine grinding . The partnership will see a product line expansion and additional mills with an increase of installed power up to 6,000 hp .
“ thyssenkrupp Industrial Solutions , a leading engineering , construction and service provider for industrial plants and systems , and Maschinenfabrik Gustav Eirich , have agreed to cooperate on the further development of the EIRICH TowerMill , a highly energy-efficient agitated media mill for the wet grinding of ores and minerals . The aim of the partnership is to build high-capacity , powerful TowerMills capable of delivering high throughputs even for fine and superfine grinding .”
Uwe Schuh , head of Grinding Technology at thyssenkrupp Industrial Solutions states : “ We need to keep pace with the complex requirements of our mining industry customers so that we can continue to offer them high-efficiency ore processing solutions in the future . That ’ s why we are combining the expertise of Maschinenfabrik Gustav Eirich as the patent holder with our long-standing experience in the development , construction , logistics , installation and service of such large-scale machines .”
Technological requirements in mines are growing ever more complex . Mineral deposits around the world contain ever-decreasing ore grades combined with increasingly fine-grained ore bodies . The partnership is thyssenkrupp and EIRICH ’ s response to the rising demand for grinding equipment capable of achieving a high degree of mineral liberation at ever higher throughput rates .
Stephan Eirich , Managing Director of Maschinenfabrik Gustav Eirich : “ We have always developed and improved our mills . Utilising the significant plant engineering experience of thyssenkrupp will now enable us to expand our portfolio to include large machines with significantly higher throughputs to meet changing market demands .”
EIRICH acquired the license to market TowerMills from the Japanese Kubota Corporation in 1999 . Today the company supplies TowerMills of various sizes up to a power rating of 1,500 hp . Worldwide over 40 mills with a combined power rating of 26 MW have been installed . Together with thyssenkrupp , the expanded product line will include units of up to 6,000 hp to guarantee the processing of fine and ultrafine grained minerals of < 20 µ m at high throughput rates . EIRICH TowerMills are an important addition to thyssenkrupp ’ s existing product portfolio , which ranges from primary crushers to ultrafine grinding mills . thyssenkrupp and EIRICH have joined forces in an ore processing partnership and believe that joint development of the proven EIRICH TowerMills will permit significantly higher throughput rates for fine and ultrafine grinding
Weir continues comminution investment
Weir Minerals describes itself as “ a leader in delivering cutting-edge , wear resistant engineered products and materials technology .” The company has long developed and manufactured leading equipment for the mining industry , with prominent global brands such as Warman ® , Cavex ® and Linatex ® but in recent years , Weir Minerals has invested heavily , through acquisition , research and product development , to become a competitive player in the comminution market .
The Weir Minerals team in South Africa , with established large mining duty sizing and dewatering screens , was the starting point for Weir Minerals ’ new comminution direction . The Weir Group ’ s 2014 acquisition of the Trio group of companies provided the platform for developing new primary and secondary crushers . This acquisition , combined with new product developments , has enabled Weir Minerals to offer a highly advanced and efficient comminution solution for hard rock mining and construction aggregates .
The latest development from Weir Minerals is the Trio ® TG60113 primary gyratory crusher , which it says is designed for ease of maintenance , high productivity and high mechanical availability .
“ The key features of our Trio TG60113 primary
MARCH 2017 | International Mining