Resource mine repairing method
A restoration method and resource utilization technology, applied in the restoration of polluted soil, etc., can solve problems such as unreasonable utilization of mineral resources, resource waste, ecological environment hazards, etc., to eliminate heavy metal and chemical pollution, maximize land value, The effect of eliminating potential safety hazards
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Embodiment 1
[0028] An abandoned gold mine, including industrial sites, dumps, and tailings ponds, needs ecological restoration.
[0029] (1) According to laboratory analysis, the gold content of the tailings resources in the tailings pond is 0.78g / t, which can be used for extraction of valuable elements, and the gold content of the ore resources in the dump site is 0.08g / t, which cannot be used for extraction of valuable elements.
[0030] (2) Extraction of valuable elements from tailings resources
[0031] The tailings resources in the tailings pond are recovered through the water mining process, and then the valuable elements in the tailings resources are extracted by using the spiral chute enrichment-fine grinding-flotation process to obtain gold concentrate with a gold grade of 25.03g / t ;
[0032] (2) The abandoned mine covers a large area, has many residents around, and has convenient transportation. There is a large reservoir 800 meters away from the mine. The mine will be restored...
Embodiment 2
[0047] An abandoned mine includes goafs and tailings ponds, which need ecological restoration.
[0048] (1) According to laboratory analysis, the gold grade of tailings resources in the tailings pool is 0.6g / t, which can be used for extraction of valuable elements.
[0049] (2) Extraction of valuable elements from tailings resources
[0050] The tailings resources in the tailings pool are mined through the water mining process to make 25% to 30% ore slurry, and then the valuable elements in the tailings resources are extracted and recovered by using the spiral chute enrichment-fine grinding-leaching adsorption process The rate is 95.22%.
[0051] (3) The analysis of the tailings after the extraction of valuable elements shows that the content of heavy metals in the tailings meets the standard, but due to the use of cyanide in the process of extracting valuable elements, the cyanide content is 235.18 mg / L, seriously exceeding the standard. Therefore, it is necessary to carry ...
Embodiment 3
[0061] An abandoned mine includes goafs and dry-stacked molybdenum tailings ponds, which need ecological restoration.
[0062] (1) It can be known from laboratory analysis that the tailings resource K in the dry pile molybdenum tailings pond 2 O grade 6.72%, Na 2 O grade is 1.61%. The potassium feldspar in the molybdenum tailings can be recovered, and the molybdenum tailings can also be directly used to prepare mineral fertilizers. According to economic analysis and post-filling requirements, it is determined that 80% of the molybdenum tailings will be used for the extraction of valuable elements, and 20% of the molybdenum tailings will be used for the preparation of mineral fertilizers.
[0063] (2) Extraction of valuable elements
[0064] The tailings resource of molybdenum tailings adopts desliming-feldspar flotation-magnetic separation to remove impurities and fluorine-free process to recover feldspar. K in feldspar concentrate 2 O grade 11.64%, Na 2 O grade is 2.11%...
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