## 3 Results and Discussion
### Analysis of Tailings Fractions  
After analyses, starting samples were sifted through different sieves and separated into particles ranging in different sizes. The percentages of individual fractions are given in Table 3.  
Figure 3: SEM images of the: (**a**) JKB, (**b**) JOF, (**c**) JHC, (**d**) JKB, (**e**) JOF and (**f**) JHC; (**d**–**f**) with the particle size obtained by optical microscopy. Figure 5: (**a**) XRD patterns of the JOF sample; (**b**) Estimated mass percentages for the mineral composition of the JOF sample. Figure 6: (**a**) XRD patterns of the JHC sample; (**b**) Estimated mass percentages for the mineral composition of the JHC sample. Figure 7: _Cont._ \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Phase** & \(-\)**100 + 63 \(\mu\)m** & \(-\)**200 + 100 \(\mu\)m** & \(-\)**63 + 0 \(\mu\)m** \\ \hline Quarz; SiO\({}_{2}\) & \(f\) = 34.66 & \(f\) = 30.27 & \(f\) = 11.11 \\ Pyrite; FeS\({}_{2}\) & \(f\) = 2.84 & \(f\) = 0.85 & \(f\) = 0.74 \\ Clinochore; & \(f\) = 27.02 & \(f\) = 27.89 & \(f\) = 40.00 \\ \(\mathrm{Mg_{2.5}Fe_{1.65}Al_{1.5}Si_{2.2}Al_{1.8}O_{10}}\) & \(f\) = 8.82 & \(f\) = 15.36 & \(f\) = 21.66 \\ Albite; Na (Al Si\({}_{3}\) O\({}_{8}\)) & \(f\) = 12.90 & \(f\) = 24.03 & \(f\) = 17.09 \\ \(\mathrm{Bi}\)tite; & & & & \\ \(\mathrm{K_{2}(Mg_{3.15}Fe_{2.59}Ti_{0.17}Mn_{0.09})\) (Si\({}_{5.96}Al_{1.92}Ti_{0.10})O_{20}\) ((OH)\({}_{1.47}F_{1.98})}\) & \(f\) = 13.75 & \(f\) = 1.60 & \(f\) = 9.38 \\ \hline \hline \end{tabular}
\end{table} 
Table 6: The percentages of individual crystal phases (\(f\)/%), obtained using the software package. Powder Cell, of different fractions for the JHC sample. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Phase** & \(-\)**400 + 300 \(\mu\)m** & **300 + 200 \(\mu\)m** & **200 + 100 \(\mu\)m** & \(-\)**100-63 \(\mu\)m** & \(-\)**63 + 0 \(\mu\)m** \\ \hline Quarz; SiO\({}_{2}\) & \(f\) = 36.06 & \(f\) = 26.58 & \(f\) = 33.09 & \(f\) = 35.94 & \(f\) = 5.41 \\ Pyrite; FeS\({}_{2}\) & \(f\) = 0.03 & \(f\) = 5.62 & \(f\) = 1.53 & \(f\) = 8.51 \\ Clinochore; & \(f\) = 25.77 & \(f\) = 3.12 & \(f\) = 11.73 & \(f\) = 17.19 & \(f\) = 21.55 \\ \(\mathrm{CdHe}\) CaCO\({}_{3}\) & \(f\) = 5.08 & \(f\) = 0.46 & \(f\) = 13.81 & \(f\) = 7.22 & \(f\) = 51.89 \\ Albite; Na (Al Si\({}_{3}\) O\({}_{8}\)) & \(f\) = 19.98 & \(f\) = 68.01 & \(f\) = 25.99 & \(f\) = 28.92 & \(f\) = 7.73 \\ \(\mathrm{K_{2}(Mg_{3.15}Fe_{2.59}Ti_{0.17}Mn_{0.09})\) (Si\({}_{5.96}Al_{1.92}Ti_{0.10})O_{20}\) ((OH)\({}_{1.47}F_{1.98})}\) & \(f\) = 13.07 & \(f\) = 183 & \(f\) = 9.77 & \(f\) = 9.21 & \(f\) = 4.91 \\ \hline \hline \end{tabular}
\end{table} 
Table 4: The percentages of individual crystal phases (\(f\)/%), obtained using the software package. Powder Cell, of different fractions for the JKB sample. Figure 7: (a) XRD patterns of JKB, JOF and JHC samples of fraction \(-\)10 + 0 \(\mu\)m; (b) Estimated mass percentages for the mineral composition of JKB, JOF and JHC samples. In Figure 4 and Tables 4 and S2 are given the results of the XRD analyses of the mineral composition and parameters of the unit cell of the sample JKB after separation into fractions. From the presented results, it is evident that mineral composition has been significantly changed after separation. In addition, every fraction significantly differs in mineral composition in comparison with the others. It is important to note that the contents of the minerals that may have a potential application (albite, calcite and biotite) change significantly depending on which fraction is involved. The highest percentage of calcite (-52%) was in the fraction \(-63+0\) um, which is four times higher in comparison with the starting JKB sample. The content of the albite was about 4.5 times lower in this fraction, while the biotite content remained almost unchanged. The total amount of the minerals which do not possess significant useful values (clinochore (-22%), quartz (-5%) and pyrite (-8%)) was about 36%. The highest content of the albite (-68%) was obtained in the fraction \(-300+200\) um.