Gold-rich beneficiation method for gold ores and gold waste ores

Abstract

The invention provides a gold-rich beneficiation method for gold ores and gold waste ores. The gold-rich beneficiation method comprises the following steps that 1, coarsely crushing the waste ores until the maximum particle size is less than 120 mm, so that the coarse crushed ores are obtained; 2, the coarse crushed ores are screened to obtain first gold-rich ores in the particle size below 30 mmand to be sorted ores with the particle size more than 30 mm; 3, the to be sorted ores enables a X-ray sorting machine, the qualitative and quantitative analysis are carried out on the elements in theores to be sorted according to the wavelength and intensity of X rays, and the waste ores and second gold-rich ores are obtained after separating ; 4, the first gold-rich ores and the second gold-rich ores are finely crushed until the particle sizes are smaller than 12 mm, and ore grinding and grading is carried out on the obtained fine products; and 5, the flotation recovery ores are carried outon the obtained ore grinding grading products, and gold concentrate products and tailings are obtained by flotation. The method disclosed by the invention can be used for effectively improving the gold grade of the ores to be grinded in the plant, the ore grinding grading amount is reduced, the ore quantity of the sorting operation is reduced, and the discharge of the tailings is reduced.

Description

technical field [0001] The invention belongs to the technical field of gold ore and gold waste rock, and in particular relates to a gold-rich beneficiation method for gold ore and gold waste rock. Background technique [0002] With the large-scale industrial mining of gold ore resources, high-grade gold ore resources are decreasing day by day, and low-grade lean ore resources (hereinafter referred to as gold ore (waste) rocks) are piled up in large quantities. The grade of gold ore (waste) rock is 0.30~0.50g / t, the grade of silver is 1.00~5.00g / t, the grade of sulfur is 1.00~4.00%, the grade of iron is 3.00~6.00%, the grade of copper is 0.10~0.20%, the grade of silicon dioxide 50.00~60.00%. The main metal minerals in gold ore (waste) rock are a small amount of gold-bearing argentite and pyrrhotite, as well as trace amounts of chalcopyrite and sphalerite. The grades of gold, silver, and sulfur in gold ore (waste) rocks are low, and the cost of direct separation is too high....

AI Technical Summary

Problems solved by technology

[0003] Aiming at the technical problem that waste ore cannot be effectively utilized in the prior art, the present invention provides a gold-rich beneficiation method for gold ore and gold waste rock, which uses coarse crushing to carry out X-ray sorting, and combines screening particle size and reasonable separation The standard design can effectively improve the gold grade of the ore entering the grinding plant, reduce the amount of grinding and classification, reduce the amount of ore in the separation operation, and reduce the discharge of tailings