Engineering & Mining Journal

JUN 2019

Engineering and Mining Journal - Whether the market is copper, gold, nickel, iron ore, lead/zinc, PGM, diamonds or other commodities, E&MJ takes the lead in projecting trends, following development and reporting on the most efficient operating pr

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Page 55 of 115

FANS AND VENTILATION 54 E&MJ • JUNE 2019 we are continually running the system in an optimal way." Digital Optimization ABB has been using digital twins — dig- ital replicas of physical assets such as fans — in its ventilation systems for a decade now, but has taken the concept to a new level with Ventilation Optimizer. "As part of level 3, we apply a more model-based algorithm to control all the fans underground, using a patented op- timizer method. This creates a digital model of the ventilation system that is then able to control all fans in an opti- mized way," Nyqvist said. "In the future, we hope to develop low-cost IoT sensors for fire scenarios or toxic source detection that will make the system even smarter." In ventilation, digital twins take the form of a model that replicates (if calibrat- ed properly) the ventilation operating pa- rameters underground. These models also have the ability to input real-time data from sensors underground to provide an updated ventilation model of the underground mine. "Mines have used ventilation model- ling software for decades, but the new twist is to tie the model with live sensors and find ways to optimize the ventila- tion," Gribbons said. "The challenge to this thinking is around the mine being a dynamic model. There is a continuous trade-off for seeking optimal ventilation versus optimal production rates, and there is a constant effort required to maintain and advance a ventilation control system in an underground mine," he add- ed. "This remains one of the challenges in advancing digital twins or VOD." Enter Electrification CO 2 , dust, humidity and toxic gases such as methane all constitute air-quality con- cerns for mining companies, but it is still chiefly nitrogen dioxide emissions from diesel vehicles that drives the need for ventilation systems in underground mines. However, increased electrification could change that. COMPANY PROFILE-PAID ADVERTISEMENT An integrated CFT wet scrubber on a continuous miner. (Photo: CFT) Paus - Robust underground Emsbüren, June 2019 - Always delivering the best solution for customers, no matter how demanding or individual the requirements may be, that is the core of "...the people who care". Founded by Hermann Paus in 1968 as a family business for special vehicles, Hermann Paus Maschinenfabrik is today under the management of Franz-Josef and Wolfgang Paus. In Emsland (Northern Germany), the company produces customized quality vehicle and machine solutions for elevator technology, construction machinery, industri- al vehicles and especially for mining and tunnelling. Active dialogue is cultivated with industry experts and customers. This is the only way to achieve successful solutions for customers with professionalism, experience and innovative strength that meet the requirements of quality, environmental friendliness, compressive strength, safety and effi- ciency. Many national and international well-known customers and dealers belong to the customer base. In order to remain true to the claim "the people who care...", Paus works every day anew on fulfilling the most different customer requirements. The mining industry requires machines and vehicles with their many extreme conditions to meet particularly high requirements in terms of reliability and safety. With the "Made in Germany" quality promise, Paus builds individual and tailor-made mining and tunnelling machines. With industrial pro- duction processes, on the one hand the production of the basic assemblies is ensured in consistently high quality, on the other hand, suitable vehicle solutions for customer-defined tasks can be supplied from these basic modules. This means that consistent, high quality is already part of the production process. The Universa 40/50 series and the MinCa series are designed as vehicle platforms. The quick-change system on Universa vehicles allows easy, safe con- figuration of various bodies on the base platform. Depending on the tasks required, whether concrete mixer, maintenance vehicle with workshop, scissor lift table or tyre changer, the Universa multi-purpose utility vehicles from Paus meet underground mining requirements flexibly, efficiently and reliably. The MinCa 18A is also a multi-purpose utility vehicle offered by Paus with a range of different "superstructures". The range extends from config- uration as a transporter for personnel or material, as a fire brigade emergency vehicle to ambulance equipment and combinations of superstructures. But that's not all, more options are available on request! The smaller MinCa 5.1 is very well adapted to the narrow conditions not only for applications in nar- row underground mining/tunnelling (e.g. Narrow Vein Mining). It can be configured for five miners as an equipment variant "passenger transporter" and still has room for the equipment. With its all-wheel drive it is perfect for use on difficult roads. The MinCa 5.1 offers more stability, has a small turning circle with various wheel steering systems and low maintenance safety with oil-immersed multi-disc brakes. An agile vehicle that is also available in a hybrid version. Brand new: At Bauma 2019 PAUS presented, after intensive tests, the latest generation of the electrically driven MinCa 5.1 E with improved bat- tery technology and proven NMC technology. In the factory-made delivery, the battery capacity amounts to 50 kW/h and is sufficient for up to 8 hours. The battery pack finds its place in the rear. The capacity "under the hood" can optionally be extended with a further 50 kW/h. Explosion-protected vehicles, such as those used in coal mining, represent the top class when it comes to the design requirements of underground mining vehicles. They must ensure reliable protection for the operator and are naturally part of the product portfolio of Hermann Paus Maschinenfabrik GmbH. Some guidelines demand that the engine tem- peratures of explosion-protected vehicles must not exceed 150°C. Optionally, an extended cooling system is available, which, depending on the ver- sion, cools the exhaust gases to only 70°C. The cooling system can also be used as a cooling sys- tem. Additional flame arresters on the exhaust and air intake lines as well as encapsulated electrical components (display, battery, headlights, switches, etc.) also ensure greater safety. Paus integrates gas sensors into its vehicles to give a warning signal if defined gas concentrations are exceeded. Furthermore, all Paus underground vehicles are explicitly designed and built for underground mining / tunnel work - they are not adapted road vehicles - advantage: considerably less mainte- nance than vehicles with conventional drives, longer durability and higher efficiency. The Paus vehicle portfolio also includes LHD, dumper, scaler, grader and rock crusher solutions. Other special vehicles are available on request. All complemented by a worldwide, permanently professionally trained dealer and service network. Further information on the Paus product range can be found at

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