A method of stacking tailings for reclamation purposes

Abstract

The invention discloses a method for stacking tailings for reclamation. According to the method, the tailings are stacked in a plant waste and tailing interbedded stacking mode, the thickness of each layer is controlled to be 5 to 50cm, a top layer of a stack body is a tailing layer with 20 to 50 percent of micro particles, and plant wastes are one or a combination of two of straw, wheat stalks, wheat husks, sweet potato stems, tobacco leaves and stalks, cassava stems and leaves, cassava residues, rice husks, bean stalks, bean husks, distillers' grains, farmyard manure, wormwood, reeds, couch grass, barnyard grass, marsilea quadrifolia, morning glory stems, setaria glauca, eleusine indica and unused shrub or arbor and branches and leaves thereof. By the method, the activity of heavy metal ions in the tailings can be effectively reduced, and heavy metal pollution is reduced; and the tailings stacked by the method can be used as soil for plant growth, replace the conventional mellow soil and are used for the fields of stony desertification control, mine recovery, urban greening and the like.

Description

technical field

[0001] The invention relates to the technical field of comprehensive utilization of tailings, in particular to a method for stacking tailings for the purpose of reclamation. Background technique

[0002] Mine tailings refer to the solid "waste" discharged by mining enterprises after sorting ore under certain technical and economic conditions. In order to provide 1 ton of concentrate, more than 1 ton, or even thousands of tons of tailings are often produced. According to statistics, in 2010, the amount of tailings produced in my country reached 1.23 billion tons, and only 172 million tons were comprehensively utilized. At present, tailings have become the bulk solid waste with the largest industrial output. Because tailings usually contain a certain amount of sulfide, when exposed to the air, it is easy to oxidize the sulfide and cause heavy metals to enter the water body in the form of ions, resulting in Heavy metal pollution; in addition, the tailings have...