Tag Archives: Gauteng

TLT-Turbo customised ventilation solution hits the spot at South Africa mine

TLT-Turbo Africa says its customised and proactive approach to ventilation solutions, combined with a new range of auxiliary and booster fans, have provided substantial electrical cost savings to a major global gold and platinum producer.

The latest installation comes just three months after installing a customised pair of TLT-Turbo Africa’s fans at one of the miner’s South Africa sites.

TLT-Turbo Africa was approached by the ultra-deep mining operation, in Gauteng, requiring a recommendation for a suitable fan solution to be installed in a section of its mine.

“Following numerous engagements, our engineering and research and development teams set out to develop a customised solution utilising our high efficiency A&B fan range,” Vusi Madlopha, TLT-Turbo Africa Head of Sales & Business Development, said.

TLT-Turbo Africa’s solution was purpose-designed to meet the requirements of the mining operation. At the time, the operation was using multiple installations of auxiliary fans to deliver the required volume and pressure (these auxiliary fans were consuming circa-630 kWe). The mine was also operating three main surface fans, each consuming around 2 MW of power.

“The client’s main objective was to ensure that a sufficient volume of ventilating air was provided to the underground operations while reducing power consumption,” Madlopha explained. “To meet their needs, TLT-Turbo Africa was required to supply two fans, each capable of moving 71 cu.m/s of ventilating air at a pressure loss of 3,000 Pa.”

These requirements fell comfortably within the design ranges of TLT-Turbo Africa’s A&B fan offering, the company said.

Based on an assessment of the mine’s needs, the final recommendation made by TLT-Turbo Africa was for two MC1600AP-160 kW dual-stage fans from the newly launched A&B fan range (specifically 1,600 mm diameter, dual-stage fans, each fan driven by two 160 kW high-efficiency motors).

There was another challenge TLT-Turbo’s team was required to resolve; the selected fans (as per standard, off-the-shelf design) would be too large to pass freely through the shaft and horizontal infrastructure to reach their installation site.

To overcome this obstacle, TLT-Turbo Africa’s R&D team custom designed the fans to be modular thus allowing transport of the fan components through the shafts and access tunnels of the mine. Once on site, the fans were easily assembled, according to Madlopha.

The complete product offering also included broadband silencers, self-closing doors and other fan ancillaries. For this project, TLT-Turbo Africa also provided locally manufactured Direct On-line starter panels.

“TLT-Turbo Africa offered the mine a solution well suited to the tough underground mining environment,” Madlopha said. “This solution would ensure a reliable supply of ventilation within the section of the mine in which the fans were to be installed.”

Three months after the installation and commissioning of the supplied fans, conditions underground at the shaft have improved noticeably, according to Madlopha. This is particularly the case in the previously warmer upper levels.

The installation and commissioning of the TLT-Turbo Africa fans described above has allowed the mine to permanently stop and remove 14 other auxiliary fans (with a total rated power of 630 kW). In addition, the mine has also been able to permanently stop one of the main surface fans, resulting in a direct energy saving of more than 2 MW of power, providing an annual electrical cost saving of more than ZAR14 million ($921,504). The capital payback period on this project has been less than three months, according to TLT-Turbo Africa.

“With the lifespan of this project exceeding 10 years, the implied electrical cost savings of this solution are massive,” the company said.

According to Madlopha, the success of the ventilation equipment at this mine can be attributed to the innovative design of the company’s A&B fan range, and the ability of TLT-Turbo’s experts to customise these fans even further to meet client and site-specific requirements.

“The system supplied was customised and optimised for that particular operation,” Madlopha said. “The design point, layout and robust structure provided an overall fan system which is not only efficient, but also reliable.”

Multotec Manufacturing tools up Spartan facility on screening demand

Continued growth in demand for Multotec Manufacturing’s screen panels has led the company to expand and upgrade the dedicated toolroom at its manufacturing facilities in Spartan, Gauteng, in South Africa.

According to Ian Chapman, Engineering Manager at Multotec Manufacturing, these technology investments have accelerated the tool manufacturing process and delivered better tool finishes. This translates into enhanced product quality, greater speed to market and more cost effectiveness for the end customer.

The tools required are mainly for rubber and polyurethane injection moulding, rubber compression moulding and cast polyurethane products. The wide variety of tooling produced includes ‘mother moulds’ and components such as frame bars, cores and inserts, Multotec says.

“By 2015, our success in growing markets had placed considerable demand on our toolroom,” Chapman said. “This led to the replacement of two CNC milling machines and adding two new wire electric discharge machines (EDM) in recent years.”

The new milling machines use specialised Heidenhain controllers, which strengthen Multotec’s jobbing capability for customised tooling, it says. Based on the specification from the sales team, drawings are created for the company’s tool and dye makers. They, in turn, convert these drawings using computer-aided manufacturing software to create the tool path for the CNC machine.

“Our experts’ familiarity with the Heidenhain language speeds up our work and avoids human error,” he noted.

Wire EDM machines are another key resource in the toolroom, using electrical erosion technology to cut relatively long tool pieces accurately and finely.

“Unlike a milling machine – where there is contact between a tool and a work piece – on the EDM, there is no engagement with the wire and hence no forces to accommodate and few residual stresses,” Chapman said. “This allows us to cut pre-hardened steel without distorting its shape, creating very fine tolerances in our finished tooling.”

To augment the existing two EDMs, a third was acquired in 2018, with even larger wire spools than the previous models.

This allows longer production runs of up to 90 hours, improving cutting strategies and productivity, Multotec says. So successful was this investment that a fourth wire EDM was purchased and installed in 2019.

Cummins launches ‘Power Hub’ in Gauteng, South Africa

Cummins has officially launched its new “Power Hub” in the Waterfall Logistics Precinct in Waterfall City, Gauteng, South Africa.

The new premises strategically consolidates and solidifies various business premises in support of the company’s position as Africa’s preferred power solutions provider, Cummins said.

The 15,355 m² facility, a ZAR350 million ($24 million) investment, houses the Cummins Southern Africa Regional Headquarters, the Master Rebuild Centre (MRC), Africa Learning Centre and Gauteng Operations.

The launch, this week, heralds the completion of a three-year project that culminated in the creation of a world-class sales and service facility, Cummins said.

“The new premises are geared to ensure ease of business dealings for customers and support of the Cummins vision of exceeding customer expectations whilst improving operational efficiencies in a collaborative manner,” the company said.

Racheal Njoroge, Managing Director of Southern Africa for Cummins, said: “We are extremely excited to officially launch our new state-of-the-art facilities. The architectural layout has been optimally and uniquely designed, adopting the Cummins Smart Office Concept (CSO) to create a space that enhances internal collaboration, encourages engagement and thereby accelerates a solution-orientated approach.”

The company has relocated from the Kelvin and Longmeadow offices to the Waterfall Logistics Precinct, positioning it “at the epicentre of Gauteng’s most dynamic and strategically located business hub”, Cummins said.

The central hub, providing power solutions for customers across the Southern Africa region, brings together a host of Cummins technically advanced expertise from mining, power systems, automotive and technical training.

Additionally, the facility provides the latest cutting-edge technology to meet industry needs: a 3,500 hp AVL Dyno Test Cell that will trial some of Cummins largest engines to full power; a precision-driven spray booth large enough to accommodate the most powerful Cummins engines’ paint applications and an environmentally advanced water purification plant, an efficient waste water treatment system which recycles 80% of water used in the MRC.

The Power Hub also launches new progressive build processes that substantially reduce the overall build time while improving quality output, Cummins said. The facility, being a part of the Cummins Distribution Business Unit, also focuses on sales and aftermarket servicing.

“The MRC continues to be a focal point of Cummins support to the mining industry, providing rebuilt engines to ensure customers can enjoy a reliable and consistent supply of engines for uninterrupted operations,” Cummins said.