At the forthcoming Expomin 2012 show from April 9-13 in Santiago, Chile, Putzmeister’s Underground Division is set to present its latest series of SPM 4210 WETKRET shotcrete equipment along with a new low-profile concrete mixer as a “complete system” for shotcreting in mining. With the SPM 4210 WETKRET series, Putzmeister claims to have reached a new stage in the development of shotcrete equipment for mining. The reinforced spraying arm, designed and manufactured by Putzmeister, provides a vertical spraying reach of 10 m; while the maximum concrete output of the double-piston pump mounted on the equipment is 20m3/h.
The proportional remote control, which can be operated by cable or wirelessly, allows for easy operation of the spraying arm as well as the regulation of the concrete output and the adjustment of the pre-defined additive dosage. With state-of-the-art axles and a reinforced turning system, the SPM 4210 WEKTRET series can also cope with rough working conditions. To facilitate its use in every working environment, the SPM 4210 WETKRET series includes three different versions which are designed in accordance with different jobsite requirements. The standard version SPM 4210 WETKRET is electrically operated and includes an on-board, electrically or diesel driven air compressor. If required, the machine is also available without air compressor. The version SPM 4210 WETKRET DUAL DRIVE has a dual operating system, so that all the components can be both operated by diesel or electrically. The equipment is available with an on-board, electrically or diesel driven air compressor. The version 4210 WETKRET ROTOR works with a rotor pump, so that the equipment can be used for both the wet and dry spraying process. This version also includes an on-board air compressor.
The new low-profile concrete mixer truck Putzmeister, known as the MIXKRET 4, has been designed to complement and improve the shotcreting process in mining. It provides a concrete transport capacity of 4 m3 and includes an additive tank for transporting and transferring additives to the shotcrete equipment. The machine is equipped with a 6-cyliner, 130 kW engine, which provides it good climbing and moving power as well as the possibility to work at high altitudes. The cabin, mounted in machine direction, and the night-vision camera at the rear, facilitate its manoeuvering and ensure good visibility conditions at all times. Compact design and state-of-the-art axles, both used for steering and driving, provide “excellent mobility and manoeuverability” in narrow galleries and tunnels. The machine has hydrostatic transmission with a stepless variable gear motor, which ensures an ideal torque to speed ratio. It also features an automatic speed control system for moving downward slopes.
