A combined recovery method of dressing and metallurgy in zinc oxide ore

Abstract

The invention discloses a dressing and smelting combined recovery method for zinc in zinc oxide ore, and belongs to the technical field of wet metallurgy. Ore slime is obtained by means of the technology that reverse flotation is conducted after ore grinding by combining the characteristics that the ore has the high slime content and the high oxidation rate for the defects of a current zinc oxide ore treatment technology, zinc oxide flotation is conducted on tailings obtained after reverse flotation to obtain zinc concentrate, and the ore slime with the high zinc content and the zinc concentrate are subjected to wet leaching together to obtain metal zinc. According to the method, a flotation and leaching combined recovery technology is adopted, and therefore compared with direct leaching of raw ore, a large quantity of gangue minerals are reduced, and the cost is reduced; reverse flotation desliming is adopted, therefore, the adverse effects of the ore slime on subsequent flotation are reduced, the selectivity of a subsequent flotation operation reagent is improved, the zinc concentrate grade and recovery rate can be increased, and meanwhile the flotation reagent dosage is decreased; in addition, the ore slime with a certain amount of zinc and the flotation concentrate are leached together, therefore, the comprehensive recovery rate of zinc is increased, and the recovery utilization degree of ore resources is improved.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, in particular to a combined recovery method of zinc in zinc oxide ore. Background technique [0002] With the development of the national economy, my country's demand for zinc and other non-ferrous metals has further increased. It is predicted that the demand for zinc resources will be about 5 million tons by 2020. However, due to the continuous mining and utilization of zinc sulfide ore, its mineral resources are increasingly "poor, fine, and miscellaneous". Therefore, the recycling of other zinc-containing ores is becoming more and more important. my country's zinc oxide ore reserves are very rich, the largest of which is the Lanping zinc oxide mine in Yunnan, with a zinc metal content of about 4 million tons. [0003] At present, the recovery of zinc oxide ore mainly adopts the sulfide-amine flotation method, but amine is sensitive to ore slime and mica, especially the ore slime, beca...

AI Technical Summary

Problems solved by technology

However, the method of direct leaching will consume a large amount of leaching reagents and increase production costs; and desliming flotation refers to continuing to use sulfide-amine flotation after removing the fine sludge, but the conventional desliming process even uses treatment Large capacity, strong production buffer capacity, stable and reliable rake thickener for operation (Huang Huaibei. Desliming Flotation Process. Coal Processing and Comprehensive Utilization. 2003 (5): 14-17.), there are still relatively high production costs high and cannot completely remove and recycle the fine mud; however, under normal circumstances, the zinc metal content in the fine mud can be as high as 10%-20% of the total zinc metal content, when the zinc metal content in the fine mud is more When large, the loss is more serious