Fluorine-free acid-free flotation process

With the strengthening of environmental protection, the fluorine-free flotation process has been successfully researched and has been promoted in some mines. The fluorine-free flotation process is not complicated. Compared with the fluorine flotation, it is only necessary to add a certain amount of alkali stirring scrub in the slurry of the flotation feldspar . Its role is to clean the shale adhering to the surface of quartz and feldspar particles, and more importantly, the added alkali causes the surface of quartz and feldspar to dissolve, which increases the difference in physicochemical properties of quartz and feldspar surface, which is beneficial to quartz. The suppression and the floating of the feldspar.

In the mid-1980s, China's research succeeded in the fluorine-free and acid-free flotation process, that is, under the natural pH value of the near-neutral pulp, the use of anionic and cationic mixed collectors was achieved by appropriate control of slurrying and flotation. Quartz and feldspar are separated. As shown in Fig. 4, the beneficiation process of the non-fluorine and acid-free flotation process is adopted in the selection workshop of the Inner Mongolia Dalin Sand Plant. At the same time, the process not only effectively eliminates the pollution of the fluoride ion and acid waste water caused by the previous flotation process, but also reduces the types of equipment and medicaments, and simplifies the process.

Dalin sand plant selection workshop flotation process

The pretreatment process of ore before the weathering of alluvial feldspar-quartz sand flotation is shown in Figure 5. The results are shown in Table 1.

Alkali scrub-de-sludge-flotation results

Alkali scrub-de-sludge-flotation process

MBS Resin

MBS resin is a terpolymer of methyl methacrylate (M), butadiene (B), and styrene (S). It is mainly used in PVC processing and molding to improve the impact of PVC resin without damaging its inherent characteristics. strength.