Leading mine ventilation fan manufacturers and suppliers ACTOM Mechanical Equipment has been awarded two main mine vent fan contracts worth a total of R56-million for two new collieries that are currently being developed as part of Sasol Mining’s mine replacement programme to extend the life of its coal operations in Secunda.
The two new mines are Shondoni and Impumelelo, which are being established to replace Middelbult and Brandspruit collieries respectively.
The award of the two contracts at the end of 2012 followed ACTOM Mechanical Equipment’s successful completion of a R15-million contract – its first ever contract for Sasol Mining – for the main vent fan system for Thubelisha, which will eventually replace Twistdraai Colliery.
In addition to its efficient execution of the Thubelisha contract, major technical factors that counted in the company’s favour in being awarded the latest contracts were the cutting edge axial flow fan system it offers in conjunction with its reputable international technology principal FläktWoods of Sweden and their willingness to customise equipment in accordance with Sasol Mining’s requirements. “In addition to these, having the fan systems for all three mines provided by one supplier offers the customer logistical and cost-saving advantages,” said Dane Martin, ACTOM Mechanical Equipment’s Mining Fan Specialist.
The two contracts, scheduled for completion in the first quarter of 2014, include use of spheroidal graphite (SG) iron impellers in place of the standard aluminium alloy impellers normally used for axial flow fans in mine vent applications.
“The conditions at Shondoni and Impumelelo necessitate the use of SG iron impellers, which have been specially custom-designed by FläktWoods, including redesign of the hub to cope with the extra weight, due to the increased density of SG iron,” Martin explained.
Don Thompson, Sasol Mining’s Principal Mechanical Engineer, said: “Experience has taught us that SG iron has much greater abrasive resistance than aluminium alloy and is therefore the best material for vent fan impellers in our view.”
The three impellers for Shondoni and two for Impumelelo – as with the two at Thubelisha – are all 3750 mm in diameter, which are the largest supplied by ACTOM Mechanical Equipment to date.
The installation at Shondoni will comprise a trifurcated system with its three fans operating in unison, while Impumelelo’s and Thubelisha’s are bifurcated systems – each individual section in all cases having an air moving capacity of 350 m3/sec. In the case of Shondoni this equates to a tonne of air being extracted from the mine per second.
ACTOM (Pty) Ltd is the largest manufacturer, solution provider, repairer and distributor of electro-mechanical equipment in Africa, offering a winning and balanced combination of manufacturing, service, repairs, projects and distribution through its 37 distribution outlets throughout Southern Africa.
ACTOM is also a major local supplier of electrical equipment, services and balance of plant to the renewable energy projects.
It also holds numerous technology, distribution and value added reseller agreements with various partners, both locally and internationally.
For further information contact Craig Johnston, ACTOM Mechanical Equipment
PO Box 1300, Germiston 1400
Tel (011) 878-3029 Fax (011) 878-3002
Press release compiled by Julian Kraft, J Kraft Public Relations
PO Box 2826 Wilropark 1731
Tel (011) 472-6686 Fax 086-613-9657
Date: February 27, 2014
Caption: A bird’s eye view of the shop floor in ACTOM Mechanical Equipment’s factory during fabrication of the ventilation channels for the trifurcated main vent system for Sasol Mining’s new Shondoni colliery.