Generally, large-scale modern heap leaching fields, especially for heap leaching and granulation heap leaching of broken ores, are mostly built by this method. The characteristic of this method is that the heap is built from the farthest distance of the ore supply and gradually approaches the supply point. As shown in Figure 1. Figure 1 Schematic diagram of the back-up method The stacking steps are as follows: (1) The ore is mechanically transported from the ore supply point to the farthest end of the yard, and the conveying machinery used may be a rear unloading car, a front end loader, a belt conveyor, a curved piler, Even small two-wheeled trolleys can be used; 2 the ore that is removed is gradually piled up to the height specified by the design, and the equipment used for the mining is some transportation machinery, such as front-end loaders and rear-loading vehicles. Some are special pile-up equipment combined with conveyor machinery, such as curved pile-up machines, and some use bulldozers alone. 3 When a part of the yard is piled up to the specified height of the design, the conveying machinery retreats and continues to unload the mine immediately adjacent to the ore pile, thus retreating and unloading the ore and mining in turn, so that the ore pile is continuously extended and expanded, and gradually builds close to the mining point. One end of the yard until the end of the entire stacking process. The advantages of receding piles are: 1 to avoid or reduce compaction caused by repeated walking of the pile by machinery or people; 2 to reduce the segregation of ore; 3 to maintain the natural formation characteristics of the ore pile, especially permeability . The height of the ore piled by this method is often limited by the height of the unloading end of the pile-up equipment. Wet Foam,Wet Foam For Flowers,Florists Foam,Wet Foam Brick SHANGHAI WELLONG IMPORT AND EXPORT CO., LTD , https://www.chinafloralfoam.com
Receding pile method and equipment