Resource utilization and harmless treatment method for gold tailings

Abstract

The invention discloses a resource utilization and harmless treatment method for gold tailings. Underflow obtained after ore dressing plant tailing slurry desliming enters a settling machine to be graded, the graded underflow of the settling machine is sieved and subjected to coarse sand removal to obtain a coarse sand product, and undersize tailing slurry is subjected to magnetic separation to obtain a non-magnetic product and a magnetic product; wherein non-magnetic products are graded by adopting a cyclone, graded overflow enters a thickener to be concentrated, underflow of the cyclone and underflow of the thickener are mixed and then dehydrated, and feldspar concentrate is obtained; wherein magnetic products are classified through a cyclone and then conveyed to a high-frequency vibrating screen for dehydration, and magnetic separation minerals are obtained; mixing tailing slurry under the high-frequency vibrating screen with the desliming overflow and the graded overflow, concentrating, and performing filter pressing to obtain a fine silt tailing filter cake, and enabling return water to enter a sedimentation tank for recycling. A gold tailing disposal mode is provided for the gold mine, the problem of unbalanced mining and filling of the gold mine is solved, and economic benefits and environmental benefits are remarkable.

Description

technical field [0001] The invention relates to the field of comprehensive utilization of tailings resources, in particular to a gold tailings resource utilization and harmless disposal method. [0002] technical background [0003] Tailings are the inevitable product of mining and dressing. At present, most small and medium-sized mines still use the traditional wet discharge method to discharge tailings to tailings ponds for stockpiling. This tailings disposal method not only has potential safety hazards of dam failure, but also has a certain impact on the surrounding environment. In recent years, with the continuous improvement of the country's environmental protection requirements for mines, the use of tailings to fill underground goafs has gradually become the mainstream of harmless disposal of tailings. But for gold mines, due to the extremely low grade of ore at present, the output rate of its tailings is as high as 99%, and due to the difference in bulk density betwee...

AI Technical Summary

Problems solved by technology

However, for gold mines, due to the extremely low grade of ore at present, the output rate of its tailings is as high as 99%, and due to the difference in bulk density between the raw ore and tailings (about 1.5 times), it is impossible to completely use all tailings. Filling in the goaf underground, it is difficult for the mine to achieve a balance between mining and filling

[0004] Although some tailings disposal methods have been reported in recent years, such as solidification stockpiling, land reclamation, etc., but these methods are difficult to obtain economic benefits and have little promotion value for mines

Therefore, there is an urgent need for a tailings disposal method with simple process, stable operation, low operating cost and better treatment effect to solve the problem of redundant tailings disposal currently faced by gold mines