Study on the physicochemical characteristics and dust suppression performance of new type chemical dust suppressant for copper mine pavement

Abstract

Mine road dust is an important source of dust in mine operations. The dust produced on the road surface is a great hazard to the workers. Aiming at the road dust of an open-pit mine, this paper conducts physical and chemical analysis of a dust suppressant prepared by using sodium polyacrylate as a binder, sodium carbonate as a moisture absorbent, polyethylene glycol as a water-retaining agent, and alkyl glycoside as a surfactant. Characterization of characteristics and dust suppression performance. The results show that the dust suppressant has a pH of 11.03, a viscosity of 18.5 mPa•s, and a surface tension of 28.1 mN/m. The content of heavy metal ions contained is less than the maximum concentration de ned by the national standard. Under the same temperature condition, the greater the humidity, the stronger the hygroscopicity, especially when the humidity is 30%, where the better hygroscopic effect than water is obvious. The dust suppressant also has good anti-evaporation properties and it keeps at 4-5% moisture content after 10 days at a normal temperature. Compared with water, the dust suppressant has better resistance to wind erosion and compression. Under the same conditions, the loss rate of water is 2 times that of the dust suppressant and the pressure of the dust suppressant sample is about 3 times that of water. The dust suppressant has a much higher dust removal e ciency for all dust and respirable dust than water under the same conditions. Finally, the test results and mechanism of the dust suppression effect of the dust suppressant are described and analyzed, which shows that the dust suppressant studied in this paper has good performance and is suitable for road dust prevention.

Formulation Development and Performance Characterization of Ecological Dust Suppressant for Road Surfaces in Cities

“…Ding [25] magnetized the surfactants in moist dust suppressants, thus enhancing the moisturizing capacity toward coal dust and improving the dust suppression performance. Huang [26] prepared a dust suppressant by using sodium polyacrylate as a binder, sodium carbonate as a moisture absorbent, polyethylene glycol as a water-retaining agent, and alkyl glycoside as a surfactant. Xiao [27] synthesized a polymer dust suppressant with raw materials of polyvinyl alcohol, carboxymethyl cellulose, and acrylamide.…”

Study on Multi-Factor Optimization and Application for Water Mist of a Wetting Dust Suppressant

“…Huang et al analyzed the changes of dust samples after spraying a dust suppressant by simulating a high-temperature environment. In this way, the water retention performance of the dust suppressant can be measured. , The experimental photos are shown in Figure ; place 20 g of the dust sample on the surface of a 90 mm culture dish and spray 5 g of the dust suppressant evenly. After the dust sample is completely wetted, put it into a 60 °C constant temperature drying oven drying to constant weight .…”

“…Water Retention Test. Huang et al 26 analyzed the changes of dust samples after spraying a dust suppressant by simulating a high-temperature environment. In this way, the water retention performance of the dust suppressant can be measured.…”

Apparent Deterioration Law and Shear Failure Mode of Rock–Mortar Interface Based on Topography-Sensing Technology

“…The relationship between normal displacement and shear displacement is described in Figure 9 . Due to the existence of irregular rough interfaces between rock and mortar, the normal displacement increases with the increase of shear displacement, while it fluctuates before the peak shear stress [ 61 , 62 ]. After that, a linear relationship is shown.…”