Study on Parameters of a New Gas–Water Spray in Ore Pass Dedusting Based on Experiment and Numerical Simulation

Abstract

To solve the problem of ore unloading dust in ore pass crosscuts, the atomization characteristics of a new gas–water spray and the effect of the ore discharge airflow on the spray effect were studied by experiments, and the installation position of the spray nozzle in the crosscut was determined by numerical simulation. The results show that when the gas–water flow ratio is 100–150, the atomization effect is the best. In this situation, the droplet size can be less than 28 μm. The impact airflow induced by ore unloading has a great influence on the size of the spray droplets, and the dust-collecting ability of the spray is negatively correlated with the impinging airflow. The best location for the spray is 5 m away from the wellhead. At this position, the impact airflow is less than 1.5 m/s, which can ensure that the total dustfall rate of the gas–water spray is 67% and that of the respiratory dust is 34%.

Spatial and temporal evolution of mine dust research: visual knowledge mapping analysis in Web of Science from 2001 to 2021

“…Therefore, researchers have deeply explored the multi-stage dust control and emission reduction linkage control technology. As of now, an integrated dust control system is being developed in mining, such as ventilation and dust discharge (Jiang et al 2021a ; Yu et al 2017 ; Zhou et al 2022 ), wet dust reduction (Peng et al 2020 ; Wang et al 2020d ; Xu et al 2018 ; Zhang et al 2021c ), airtight dust extraction (Chen et al 2022b ; Nie et al 2016 ), purified wind flow (Wang et al 2014 ), and dust suppressant (Li et al 2021 ; Wang et al 2014 ; Zeng et al 2023 ; Zhou et al 2020b ; Zhu et al 2021 ). Cai et al studied the influence of exhaust air volume and forced ventilation height on dust suppression performance of mixed ventilation system (Cai et al 2019 , 2021 ).…”

Study on the control of high ore pass dust pollution by pre-injection foam dedusting technology in the ore bin

“…Under the action of shear air ow, the ne dust in the ore and oating dust in the structure of the ore pass are raised quickly, and a large amount of dust enters the middle section of the lower part of the unloading port along with the air ow (Wang et al 2017c), leading to the problem of dust pollution in the mine (Chen et al 2016, Wang et al 2020b. At the same time, with the increase of mining depth, the ore unloading gap gradually increases, dust pollution problem is also gradually intensi ed (Wang et al 2020c). Therefore, it is very important to put forward an e cient dust removal measure to suppress dust pollution in the ore pass unloading process.…”