The effects of the installation position of a multi-radial swirling air-curtain generator on dust diffusion and pollution rules in a fully-mechanized excavation face: A case study

Liu, Qiang; Nie, Wen; Hua, Yun; Peng, Huitian; Liu, Zhiqiang

doi:10.1016/j.powtec.2018.01.064

Cited by 127 publications

(29 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, dust dispersion has a strong tendency to cause accidents. Specifically, at certain coal yards of thermal power plants, dispersed coal dust may accumulate at steam pipelines and electric cables and eventually catches fire spontaneously, which severely affects the normal operation and reduces the service time of the mechanical and electrical equipment as well as pipelines . Therefore, coal dust pollution constitutes a major issue for the modern society, and there exists an urgent need to develop effective techniques to mitigate the dust dispersion pollution at open‐pit coal mines …”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of a novel environmentally friendly coal dust suppressant

Nie

Zhang

et al. 2018

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

To mitigate the dust dispersion pollution in the open-pit coal mines, this study experimentally develops a novel environmentally friendly coal dust suppressant. The experiment uses naturally biodegradable soybean protein isolate (SPI) as the main material and utilizes anion surfactant sodium dodecyl sulfate (SDS) to modify SPI. In the carboxymethylcellulose sodium and sodium silicate and other auxiliary agents, this process produces gives rise to the SDS-SPI coal dust suppressant. Experimental characterization of the developed dust suppressant reveals that the viscosity of the 5% dust suppressant solution can reach 24.6 mPa s. Correspondingly, the compressive strength reaches 0.48 MPa, and the dust suppression efficiency can reach 93.47% with the presence of force 9 wind. Furthermore, this study uses Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM) to analyze the dust suppression mechanism of the developed dust suppressant. It is observed that a layer of compact hardened shell is formed at the surface of the coal powder treated with the newly developed dust suppressant. Also, there exists a strong cementing effect among dust particles, yielding a decent cementing performance. Therefore, the present dust suppressant can effectively suppress dust dispersion in the open-pit coal mines, allowing a mitigation of the environmental pollution.

show abstract

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of a novel environmentally friendly coal dust suppressant

Nie

Zhang

et al. 2018

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

show abstract

“…Through this mechanism, starch is initiated to generate free radicals; this, in turn, initiates acrylic acid monomers to form starch–acrylic acid free radicals. These radicals continue to react with acrylic acid; this makes the chain undergo growth and polymerization until chain termination occurs . The entire reaction process is outlined in Figure : Chain initiation: the decomposition of the initiator gives rise to primary free radicals, which in turn react with starch and acrylic acid monomers to form starch–acrylic acid free radicals. Chain growth: the produced starch–acrylic acid free radicals continue to react with alkene monomers to form free‐radical chains. Chain termination: the chain termination is triggered by the removal of hydrogen from the hydroxyl‐carrying carbon atoms. …”

Section: Methodsmentioning

confidence: 99%

Preparation and characterization of a binary‐graft‐based, water‐absorbing dust suppressant for coal transportation

Qiu

Nie

Liu

et al. 2018

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

During coal transportation, a large amount of coal dust is generated; this not only leads to a massive loss of coal but also causes severe environmental pollution. In this research, we used a chemical modification approach to prepare a highly water-absorbing dust suppressant. Corn starch, as the main ingredient, was copolymerized with acrylic acid and acrylamide, and acrylic acid and acrylamide were used to form a starch graft copolymer. Subsequently, in this research, we designed a suite of single-factor experiments using the viscosity as the metric to determine the optimal reaction conditions, which were as follows: mass ratio of acrylic acid to acrylamide = 3:2, neutrality = 50%, reaction time = 3 h, and reaction temperature = 50 C. Tests were carried out to assess the viscosity, water retention, and anti-evaporation performance of the dust suppressant. The results indicate that when the dust-suppressant concentration was 6%, the performance was optimized. Also, the anti-evaporation behavior of the suppressant improved with the dust-suppressant concentration. The use of this dust suppressant during coal transportation could greatly reduce dust dispersion and lead to improved environmental protection.

show abstract

“…Greater air quantity reduces the dust concentration and methane [43]. The proportion between air flow streamlines and respirable dust trace lines show that respirable dust is largely affected by the air drag force [44].…”

Section: Environmental Monitoring Of Underground Coal Minesmentioning

confidence: 99%

Dust Generation and Respiratory Impact of Underground Coal-Producing mines in Pakistan

Ijaz

Akram

Ahmad

et al. 2020

Pol. J. Environ. Stud.

View full text Add to dashboard Cite

Coal is a major source of energy in developing countries. Its underground mining exposes workers to respirable dust containing silica, causing respiratory illness. The objectives of this study include measuring this dust and the percentage of its silica content and evaluating the prevalence of respiratory diseases among coal cutters. A walkthrough survey performa, SKC Airchek 52 (SKC Inc., eighty four, PA, USA) air sampling pumps, an anemometer, hygrometer, multi-gas detector, a thermometer and modified International Union Against Tuberculosis and Lung Disease (IUATLD) respiratory questionnaire were used to collect data from 64 workers working in 5 different mines of Chakwal District in Punjab, Pakistan. Mine E, with the lowest ventilation volumetric flow rate (18m 3 /s), has the highest dust concentration (6.10 mg/m 3 , silica content 2.699%). Conversely, mine A, with the highest ventilation volumetric flow rate (45 m 3 /s), has the lowest dust concentration (2.58 mg/m 3 , 1.33 % silica content). Survey results show that 71% of workers inherited this occupation, 94% did not smoke, 99% did not use any dust mask, 47% have diagnosed tuberculosis and 8% asthma. About 57, 48, 44 and 42 workers reported cough, phlegm, chest tightness and shortness of breath, respectively. The 89% workers were told by their physicians that dust exposure was the reason for their respiratory ailment.

show abstract

The effects of the installation position of a multi-radial swirling air-curtain generator on dust diffusion and pollution rules in a fully-mechanized excavation face: A case study

Cited by 127 publications

References 25 publications

Preparation and characterization of a novel environmentally friendly coal dust suppressant

Preparation and characterization of a novel environmentally friendly coal dust suppressant

Preparation and characterization of a binary‐graft‐based, water‐absorbing dust suppressant for coal transportation

Dust Generation and Respiratory Impact of Underground Coal-Producing mines in Pakistan

Contact Info

Product

Resources

About