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.
Daily maintenance of excavator hydraulic cylinders
Big arm cylinder kit, middle arm cylinder kit, small arm cylinder kit Safe Seal Technology Co., Ltd. , https://www.aprseal.com
The hydraulic cylinder of an excavator is one of the important hydraulic components responsible for driving and controlling mechanical movements. In order to ensure the normal use of hydraulic cylinders and extend their service life, daily maintenance is necessary.
1. Regularly clean the hydraulic cylinder: During use, the hydraulic cylinder will be attacked by various pollutants, such as dust, sediment, oil stains, etc. These pollutants can affect the working efficiency and lifespan of the hydraulic cylinder. Therefore, it is necessary to regularly clean the hydraulic cylinder.
2. Regular inspection of seals: The seals of hydraulic cylinders are key components to ensure their normal operation. If the seals are damaged or worn, it can lead to oil leakage or unstable operation of the hydraulic cylinder. Therefore, it is necessary to regularly inspect the sealing components of the hydraulic cylinder and replace them in a timely manner if there is any damage or wear.
3. Regular inspection of hydraulic oil: The operation of hydraulic cylinders requires the support of hydraulic oil, so the quality of hydraulic oil has an important impact on the working effect of hydraulic cylinders. Regularly check the quality of hydraulic oil, and replace it promptly if there is contamination or deterioration.
4. Regularly check the hydraulic pipeline: The hydraulic pipeline is the blood vessel of the hydraulic cylinder. If there is oil leakage or damage to the pipeline, it can cause the hydraulic cylinder to not work properly. Therefore, it is necessary to regularly inspect the hydraulic pipelines and promptly repair or replace them if there is any oil leakage or damage.
5. Regularly lubricate the hydraulic cylinder: The piston rod and piston ring of the hydraulic cylinder need to be lubricated to reduce wear and friction. Therefore, it is necessary to regularly apply lubricating oil to ensure the normal operation of the hydraulic cylinder.
In short, the daily maintenance of excavator hydraulic cylinders is very important, which can extend their service life and improve work efficiency. Regular cleaning of hydraulic cylinders, inspection of seals, hydraulic oil, hydraulic pipelines, and lubrication of hydraulic cylinders are required.