Beneficiation process for recovering fluorite from tailings

Abstract

The invention discloses a beneficiation process for recovering fluorite from tailings, which comprises the following steps: carrying out weak magnetic-strong magnetic operation on raw ore to obtain anon-magnetic product; concentrating the non-magnetic product by using a first concentration box to obtain a first concentrated underflow, adding clear water to dilute the first concentrated underflow,and further concentrating the mixture in a second concentration box to obtain a second concentrated underflow; performing fluorite roughing and scavenging on the second concentrated underflow to obtain rough concentrate, performing concentration I, concentration II, concentration III and concentration IV on the rough concentrate, wherein the concentrate of the concentration IV is final concentrate. Waste is thrown through magnetic separation, so that pre-enrichment of fluorite is achieved, and the flotation operation handling capacity is reduced; through two-stage concentration operation, slime and ore pulp agents are removed, and equipment and agent investment is reduced; an efficient organic inhibitor is adopted for deeply inhibiting floating of calcite and quartz, the dosage of the efficient organic inhibitor is far smaller than that of conventional acidified sodium silicate, the number of concentration operation sections is reduced, and finally high-quality fluorite concentrate with the CaF2 grade larger than 97% is obtained.

Description

technical field [0001] The object of the present invention is to provide a kind of beneficiation process of reclaiming fluorite from tailings, the process flow is short, easy to operate, and the obtained fluorite concentrate CaF 2 Grade>97%. Background technique [0002] The content of valuable elements in the tailings is low. Generally, in the early stage of beneficiation, after grinding and chemical action, the degree of mudification is high and the chemical pollution is serious, so the follow-up treatment is very difficult. The flotation tailings of polymetallic fluorite associated ores generally contain more calcite and fluorite. In the early flotation process, fluorite was strongly suppressed as gangue. When the fluorite content was low (CaF 2 content < 20%), many mines do not consider recycling it, and discard it directly as tailings. The main reasons are: (1) high processing costs, and steps such as desliming, drug removal, concentration, and activation are req...

AI Technical Summary

Problems solved by technology

The current problems are as follows: the fluorite flotation of tailings is seriously affected by the upstream flotation operation, generally requires steps such as drug removal, desliming, concentration, activation, etc., with large processing capacity and high cost; the grade of fluorite in tailings is low, The beneficiation operation often needs 7-10 times, the process is long, the operation is complicated, and the recovery rate is low; the types of minerals in the tailings are complex, the quality of the concentrate is difficult to improve, and the final CaF2 grade of the concentrate is difficult to reach 97 %

Images