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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E Q U I P M E N T G A L L E RY unit is based on the Sentro 8 integrated monitoring station and features eight monitoring modules for five gases. The self-contained unit has an integral carrying handle and a stainless steel skid-panel base plate. www.trolex.com Screen Provides Improved Capacity, Reliability and Safety models accommodate a variety of personnel (executive, manager, worker), and multiple bathroom configuration options are available, including individual or shared EnSuite bathrooms or communal bathroom layouts. www.aks.com Monitor Conditions Inside/ Outside Refuge Chambers U.K.-based Trolex Ltd. has developed an intrinsically safe monitoring system designed specifically for underground miner refuge chambers. According to the company, these systems allow miners to check conditions both inside and outside the chamber while awaiting rescue, providing the capability to decide whether it is safer to stay put or begin their escape. In a fixed refuge chamber system, Trolex employs its Sentro 8 and Sentro 1 integrated monitoring station with intelligent, interchangeable sensing modules. A master Sentro 8 system www.e-mj.com is located in the main safety chamber to monitor five gases plus temperature, humidity and pressure, and the secondary Sentro 8 system is located outside the chamber to measure four to seven gases plus relative pressure. Within the air lock or transition space before entering the main chamber, two gas detectors measure the levels of oxygen and carbon monoxide. All equipment uses universal data communications with standard Modbus protocol. There are large LCD read-out displays and programmable visual and audible alarms and the entire system is capable of 106 hours operation from a UPS power supply. Trolex also offers the Sentry transportable chamber monitoring system. This stand-alone Metso's latest high-energy elliptical motion horizontal screen, the model ES, is claimed to provide increased uptime and safer maintenance, while delivering up to 25% more screening capacity compared with a conventional screen of the same size. The two unbalanced shaft lines in the Metso ES rotate in opposite directions, generating a high-energy elliptical motion with a selfsynchronization design. The ES also features a robust deck frame design, with no welding along the cross-member sections. The weld-free side plates ensure optimal durability and a high stress tolerance, and the huck-bolted design guarantees accurate assembling conditions. There are no mechanical timing devices, gears, belts or oil leakage, which together with the reliable grease lubrication system, keeps downtime and maintenance to a minimum. The unit also offers up to 50% more space between the decks compared with similar flat screens, for easier, safer and more comfortable access for maintenance. The Metso ES is equipped with coil spring covers, rubber stabilizers, high-safety belt guards and one centralized, conveniently located JULY 2013 • E&MJ; 83