Process for reducing non-ferrous metal solid waste source based on hydraulic flotation technology

Abstract

The invention relates to a process for reducing a non-ferrous metal solid waste source based on a hydraulic flotation technology, belonging to the field of comprehensive treatment for non-ferrous metal solid waste. The process comprises the steps that crushed raw ore is fed into a high-pressure grinding roller for coarse grinding while over-crushing is reduced, the raw ore with a particle size of-5 mm, -4 mm, -3 mm, -2 mm or -1 mm is screened out preferentially and allowed to enter a hydraulic flotation section, and coarse-particle tailings obtained after hydraulic flotation serve as buildingsand and do not enter a tailing pond; and a rough concentrate having undergone hydraulic flotation enters a ball mill for fine grinding, a fine ground product is graded by a grading machine and overflows to an existing flotation stage for preparation of a qualified concentrate, and fine-grain tailings are discharged into a tailing dam. Compared with conventional non-ferrous metal ore beneficiation processes, the process of the invention has the following advantages: coarse tailings are generated, so conversion into various building materials is facilitated, and large-scale reduction of the non-ferrous metal solid waste source is achieved; and rough grinding and tailing pre-discarding are carried out, so the total energy consumption of ore grinding is reduced, treatment capacity is increased, the grade of fed materials entering the subsequent flotation section is increased, and a subsequent flotation process is expected to be shortened.

Description

technical field [0001] The invention relates to the field of nonferrous metal beneficiation, in particular to a source reduction process for bulk nonferrous metal solid waste based on hydraulic flotation technology. Background technique [0002] Non-ferrous metal mineral resources occupy an important position in my country's national economy and are widely used in various fields such as steel, electronic products and chemicals. The rapid development of social economy has led to a sharp increase in the demand for non-ferrous metal mineral resources; at the same time, due to the depletion of high-quality mineral resources, the proportion of low-grade non-ferrous metal mineral resources with low grade, fine grain size and complex mineral composition in the field of mineral processing increasing day by day. For example, at present, the raw ore grade of molybdenum ore in my country is mostly lower than 0.1%, and the extremely low grade of raw ore results in a large amount of tai...

AI Technical Summary

Problems solved by technology

Fine grinding leads to high grinding energy consumption and severe mill wear; in addition, the content of fine particles in the tailings is too high, which not only makes it difficult to dehydrate the tailings, but also cannot be comprehensively utilized due to the fine particle size of the tailings, and all the tailings enter the tailings pond Storage results in higher costs and greater pressure on environmental protection

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