Landfill mining waste generally has the characteristics of complex material components, wet and sticky agglomeration, and low dispersion. According to the characteristics of landfill mining waste, targeted improvements, optimization and innovative designs of screening equipment are carried out to improve screening performance and reduce the number of single passes sorting load through multi-stage sorting., improving sorting efficiency, solving the problems of material agglomeration and poor separation accuracy, improving the purity of light materials and humus soil, and reducing the slag content are the keys to realizing resource utilization of screening products.
Landfill Mining Waste recycling Project
Multi-Dimensional Fine and Efficient Separation Technology
First, the excavated landfill mining waste is transported to the screening equipment, and then enters the pre-screening machine through the leveler for pre-screening. The pre-screened waste enters the conveyor belt for manual sorting, and some of the garbage is sorted out. The garbage after manual sorting is then separated through six levels of high-efficiency comprehensive separation including magnetic separator, rotary drum screen, and wind sifter system to obtain humus soil, aggregates, metals, light substances, etc.
Landfill Mining Waste Screening Process Flow Chart
Landfill Mining Waste Recycling in Multiple Ways
landfill mining waste generally contains humus, aggregates, metals, light substances and other components. Multi-channel resource utilization converts various screened substances into valuable resources, achieving both waste reduction and resource utilization target.
- Humus soil is the main component of landfill mining waste, accounting for more than 50% of the total garbage. Humus soil is rich in organic matter and nutrients such as nitrogen, phosphorus, and potassium, which can provide nutrients to the soil and enhance the stress resistance of plants. It is a good plant growth substrate. Develop green, low-cost humus soil harmless improvement agents and technical processes, and explore its matrix utilization technology in landscaping, mountain restoration, lawn planting, etc., to achieve the replacement of other natural resources such as peat, soil is an important direction for the recycling of humus soil resources.
- After the aggregates in the garbage are effectively separated, they can be used as municipal fills, road subgrades, construction materials, etc. Metal can be recycled for secondary processing.
- Through screening tests, it was found that especially in middle-aged landfills, because the degree of degradation of the landfill is not high, the content of light combustible waste is relatively high. How to deal with this part also determines the comprehensive recycling quality of the landfill. The calorific value of light combustibles is higher than that of domestic waste. Light combustibles can also be made into waste-derived fuel(RDF) through processes such as crushing, drying and pelleting.
Landfill mining screening technology not only solves the environmental pollution problem that has plagued us for a long time, but also provides strong support for sustainable urban development by freeing up available land and realizing resource recycling. The application of technology not only has significant environmental benefits, but also brings considerable economic benefits, truly achieving a win-win situation between economic and environmental benefits.
