MINEXPO PREVIEW II
avoid cracking issues often observed on cast pieces and the design allows the combination with cast parts in the same crawler track. Guy Baron, Product Manager for Tool and Die steels explains:“ Industeel’ s crawler shoes are 100 % machined from forged quenched and tempered steel blocks made of Mecasteel 145 grade. Mecasteel 145 is a 3.5 % Ni steel providing high mechanical properties superior to 1,100 MPa tensile strength, homogeneous throughout the thickness, combined with a very good toughness greater than 20 J at-40 ° C and a perfect soundness. Forged parts have a better internal metallurgical quality than castings, just because of the hot reduction ratio applied to forgings, and all our forged blocks are 100 % UT controlled.”
A Bucyrus 495 HD shovel, equipped with a full set of Industeel’ s forged crawler shoes has worked in a large iron ore mine in Canada. The environment is severe because of the low temperatures in winter(-40 ° C) and because of the hard-rock ground surface. The machine worked throughout the last winter period without recording a single cracking issue. Lifetime is expected to be 35,000 + hours.
Products on display by ESCO will include what the company describes as“ an industry altering tooth changing technology” and the latest cast lip series added to the Nemisys ® family. There is also to be a new Nemisys cast lip offering for cable shovel buckets.
ProSeries Dragline chain and rigging will also be displayed from ESCO’ s field-proven range of blades, crusher wear parts, lip systems, ground engaging tools, attachments, and wear management.
New, powerful pump drive solutions are needed to meet the continuously growing challenges in the field of mobile hydraulics and cope with the harsh operating conditions to which equipment is subjected. To address this need, Stiebel-Getriebebau has developed advanced pump drives which combine an improved energy balance, greater flexibility for the most varied applications, and impressive performance. They will be displayed at MINExpo. For mid-size mining excavators and above( from around 300 t), the Stiebel Type 4462 pump drive provides the driving force. It is connected to the engine( 800 kW) via an SAE bell housing adapter. The available range of transmission ratios varies between i = 0.9 and 2. The integrated oil pump and the oil distribution system used by Stiebel ensure optimum lubrication and cooling of the pump drive. This means that sloping positions – of up to 30 ° in all directions – are possible during operation. Overall, a maximum of six pumps can be fitted on both sides which actuate the swivel and reach operation together with the other hydraulic functions. Furthermore, the hydraulic pump attachments also provide a separate oil chamber to ensure operating reliability for the hydraulic unit system.
With the Type 4382 single-stage pump drive from the P2000 range, Stiebel-Getriebebau has created a special solution for a wide range of mobile hydraulic applications. The robust, torsionally stiff drive employs the proven modular system to offer a comprehensive range of attachment variants. The unit is connected using an SAE bell housing or cardan flange. Three pump connections at the take-off with freely selectable SAE connector are available. The maximum torque per take-off is 1,500 Nm and a maximum speed of up to 3,000 rpm is possible. At an engine power of 530 kW the pump drive is available with a transmission ratio of i = 0.6572 to 1.5217. The design – with a weight of 200 kg and block casing – is particularly compact, allowing space-saving integration. Thanks to a special lubrication system, which uses customised internal ribbing and oil pockets, the lubrication of all necessary components is ensured.
A high degree of adaptability means the Stiebel Type 4652 pump drive can be an ideal drive solution – in particular for mobile tracked drill rigs. This is because its particularly compact design allows easy underfloor installation. The geometric offset of the drive / take-off, the large oil volume and solid ribbing of the casing result in an outstanding energy balance for the pump drive. This means that an additional oil cooler is not usually necessary. The drive therefore ensures economical and sustainable operation with Pmax = 700 kW, T2max = 3,300 Nm and a maximum speed of 2,500 rpm.
Thompson Pump, a full-service manufacturer and provider of high quality, diesel-driven pumps, pumping equipment and engineering expertise, will showcase two of its most popular mine dewatering pumps. Thompson’ s JSC series is ideal for high head and high volume applications
The Stiebel Type 4652 pump drive, with its very good energy balance and power transmission, is in demand for drilling rigs in particular
where solids handling is often a concern and automatic priming is preferred. The company says“ the JSC family of pumps is the industry leading dry prime pump series as it uses its Enviroprime System ® to provide automatic priming, prevent blow-by and reduce maintenance costs.” These pumps are ideal for wash-down operations, tailings, pit dewatering, dust control and other temporary applications. The durable construction and highly efficient pump ends provide longer life and economical operations resulting in lower fuel costs.
Because of the corrosive and abrasive nature of many pump applications in mining, Thompson offers its JSC series with different alloys and levels of hardness. On display, the model 8JSCE will feature a CD4MCu stainless steel pump end and all stainless steel priming system.
Another factor affecting equipment selection and availability in today’ s market is government regulated emissions standards for diesel engines. It is important to be able to adapt to different regulations and engine preferences depending on the market and customer. Thompson’ s 6JSCL will be powered by a final Tier- 4 engine made by MTU. Both are high head pumps, capable of pumping a 76 mm solid and use Thompson’ s Enviroprime System.
With its heavy-duty cast-iron construction, ability to dry-prime and re-prime automatically and reliably, the 8JSCE is an end-suction centrifugal pump designed for high flows and high heads to 90 m, giving it a wide range of operation for multi-purpose use. Solids handling to 76 mm is among the best in its class.
The portable 6JSCL pump delivers 127 litres / s, high heads up to 145 m with automatic initial
60 International Mining | SEPTEMBER 2016