A complex and refractory sulfide ore flotation process with associated silicon/aluminum

Abstract

The invention discloses a flotation process for complex and refractory sulfide ores associated with silicon / aluminum, sedimentary pyrite, and silicon / aluminum resources such as bauxite, pyrophyllite, and chlorite for comprehensive utilization. The method comprises the following steps: (1) raw ore grinding (2) pyrite flotation (3) thickening and desliming (4) pyrophyllite flotation (5) chlorite flotation. By adopting the flotation process of the present invention, high-quality pyrite, bauxite, pyrophyllite, and chlorite can be obtained from such complex and refractory sulfide ores associated with silicon / aluminum, so as to achieve tail-free recovery of such resources. production and maximum comprehensive utilization.

Description

technical field [0001] The invention belongs to the technical field of beneficiation of complex and refractory sulfide ores, and in particular relates to a flotation process of sedimentary pyrite with accompanying silicon / aluminum. Background technique [0002] Complex and refractory sulfide ores with associated silicon / aluminum, as the name suggests, have poor ore endowment, low grade, many mineral types, complex and difficult to select, and it is difficult to obtain a single qualified concentrate product. It is the research direction and wish of ore dressing workers to maximize the use of such complex and refractory sulfide ores associated with silicon / aluminum resources, and it is also a research hotspot. The proven sedimentary pyrite resources in Guangxi, my country in recent years have reached 250 million tons, and the average sulfur grade of the ore is about 16%. The main available minerals in the ore are pyrite, accompanied by pyrophyllite and monohydric Si / aluminum m...

AI Technical Summary

Problems solved by technology

[0004] Studies have shown that the S element of this complex and refractory sulfide ore associated with silicon / aluminum resources mainly occurs in pyrite, and the primary particle size of pyrite is statistically less than 0.074mm accounting for 60%, and less than 0.01mm accounting for about 24%. It is very fine, and it is difficult to recycle at full size; the industrial aluminum minerals in the ore are mainly diaspore, followed by gibbsite and gibbsite, the total mineral content is about 19%, the effective aluminum mineral content is low, and the particle size is fine , and mixed with aluminum-silicon minerals such as pyrophyllite, chlorite, kaolinite, and montmorillonite, it is difficult to recycle (and for bauxite mineral processing with an aluminum-silicon ratio of 1.5 or lower, there are still There is no relevant research report, which is very difficult); the mineral content of pyrophyllite is about 30%, and pyrophyllite is mostly in the form of microscopic scales, and often aggregates into laminated, fan-shaped, and bundle-like aggregates

The particle size (long diameter) of pyrophyllite is mostly between 0.01mm and 0.1mm, but it is easy to muddy, deteriorates the flotation environment, and makes flotation separation difficult; in addition, chlorite, sepiolite, halloysite, silk Minerals such as mica are mostly aphanitic, and a small amount of them are very fine microscopic scales, and the particle size is basically less than 0.005mm. The crystalline kaolinite is also indistinguishable, which shows the difficulty of recycling

All of the above lead to extremely difficult classification and recovery of various minerals in the ore, and the overall level of resource utilization is low

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