## 6 Research Conclusions  
Through experimental investigation, this study examined the influence of surface tension (ranging from 33.60 mN\(\cdot\)m\({}^{-1}\) to 71.97 mN\(\cdot\)m\({}^{-1}\)) and viscosity (ranging from \(0.89\times 10^{-3}\) to 1.46 \(\times\) 10\({}^{-3}\) Pa\(\cdot\)s) on the atomization effect of solid cone nozzles, and adjusted the atomization effect based on the observed influence. Field dust suppression experiments were then conducted, leading to the following conclusions:  
1. It is crucial to ensure that the dust-fog coupling is situated in the core area of the fog field, where alterations in surface tension and viscosity significantly affect droplet size and velocity, facilitating better merging with dust particles for sedimentation. Along the axial direction of the fog field, modifying surface tension is more effective than modifying viscosity in achieving droplet size and velocity matching with dust particles. In the radial direction, reducing surface tension and increasing viscosity will cause uneven distribution of droplet size and velocity in the radial section.
2. To achieve a uniform fog field for effective dust suppression, reducing surface tension is necessary to promote the expansion of the fog field area closer to the nozzle, while increasing viscosity is necessary to ensure the stability of the fog field in the stable region.
3. It has been indicated by the experimental results that the dust reduction efficiency of respirable dust compared to total dust can be significantly enhanced by altering the surface tension and viscosity of the solution in the solid cone nozzle. Therefore, it is necessary to optimize the surface tension and viscosity of the dust reduction solution in the respiratory dust collection zone to improve the working environment during actual production operations.  
Conceptualization, G.L.; Writing--original draft, H.Y.; Writing--review & editing, J.W. and J.T.; Supervision, M.L.; Funding acquisition, G.L. All authors have read and agreed to the published version of the manuscript.  
\begin{table}
\begin{tabular}{p{42.7 pt} p{42.7 pt} p{42.7 pt} p{42.7 pt} p{42.7 pt} p{42.7 pt} p{42.7 pt} p{42.7 pt}} \hline \hline \multirow{2}{*}{\begin{tabular}{} \end{tabular} } & \multirow{2}{*}{\begin{tabular}{} \end{tabular} } & \multirow{2}{*}{\begin{tabular}{} \end{tabular} } & \multirow{2}{*}{\begin{tabular}{} \end{tabular} } & \multirow{2}{*}{\begin{tabular}{} \end{tabular} } & \multirow{2}{*}{\begin{tabular}{} \end{tabular} } & \multirow{2}{*}{\
\begin{tabular}{} \end{tabular} } & \multirow{2}{*}{
\begin{tabular}{} \end{tabular} } \\ \cline{4-4} \cline{6-6}  & & & & & & & \\ \hline Pure water & 71.97 & 0.89 & 19.45 & 4.70 & 6.50 & 1.53 & 66.52 & 67.44 \\
2\% dodecyl solution & 33.60 & 1.12 & 19.45 & 4.70 & 3.70 & 0.70 & 80.10 & 85.11 \\
5\% dodecyl solution & 53.70 & 1.46 & 19.45 & 4.70 & 4.80 & 1.00 & 75.32 & 78.72 \\ \hline \hline \end{tabular}
\end{table}
Table 1: Dust fall rate of test solution.  
**Funding:** This research was funded by Postgraduate Innovative Project of Central South University (Project No. 2021 XQLH004).  
**Informed Consent Statement:** Informed consent was obtained from all subjects involved in the study.  
**Data Availability Statement:** The data presented in this paper.  
**Conflicts of Interest:** The authors declare no conflict of interest.