Materials and minerals processing technology provider IMS Engineer-ing is making a breakthrough in the local coal industry with its MinPro range of feeder breakers.
“When we launched the Hazemag MinPro range two years ago, we believed it would be of particular interest to the local underground and opencast coal mining industry, which has proven to be the case,” says IMS Engineering marketing man- ager Shannon McEwan.
The company recently installed a MinPro FB-type feeder breaker in the Witbank coalfield, where it is used to crush run-of-mine (ROM) coal at between 600 t/h and 700 t/h. IMS proposed the use of the MinPro FB machine for the primary crushing station to help simplify the project installation and operation.
“Few to no civil structures are required. We employ low truck ramps and the trucks tip directly onto the crusher’s chain feeder. There is no need for expensive feed hoppers or complex concrete or steel structures, as the tipping action creates a natural bunker,” says McEwan.
The MinPro FB machine, which accepts feed sizes of up to 2 000 mm in edge length and crushes the material down to 95%, or 150 mm, was custom-scoped for the project by IMS and manufactured by parent company Hazemag & EPR’s facilities in Dülmen, Germany.
The completed and test-run machine was containerised and shipped to South Africa and assembled, installed and commissioned by Hazemag and IMS technicians.
The MinPro FB-type feeder breakers can be employed in a range of applications, including, but not limited to, ROM coal (with limited rock inclusions), lignite, gypsum, potash, rock salt, bentonite, petroleum coke, clay and many other soft to medium-hard ores. MinPro FB-type models cover capacities of up to 2 500 t/h.
Meanwhile, the MinPro SB-type feeder breaker is unique in its ability to deal with a much harder type of rock. “It is ideal for ROM hard coal, with a high percentage of hard rock inclusions,” says McEwan, adding that these units are being used on a significant scale in various coal mines in China, where several large feeder breakers process material directly from the pit wall benches, while also crushing overburden in the same operations.
These feeder breakers also operate in many other openpit and underground mining and quarrying applications, including primary crushing of medium-hard to hard limestone and dolomite. “There are many successful operations in limestone quarries in Europe, the US and India, besides others,” says McEwan.
“We have even crushed hard and abrasive granite around 400 MPa, in tunnel development operations in the mountains of Europe,” he adds.
MinPro SB-type models cover capacities of up to 4 000 t/h, accepting very large feed of up to 3 000 mm in edge length.
MinPro installations feature a relatively light, compact design, horizontal material flow and a programmable logic controller, which enables overload protec- tion and remote-controlled operation.
“The units are designed for stationary, semimobile or mobile applications. We have feeder breakers on skids or without skids for fixed or semi- permanent installation and feeder breakers on tracks which are powered or unpowered and free-running and can be coupled to a front-end loader and pulled into position,” says McEwan.
IMS Engineering markets all Hazemag’s products and technology developments to the African market.