Liu Yanghao, Nie Wen, Mu Yubing, Zhang Haihan, Wang Hongkun, Jin Hu, Liu Zhiqiang
College of Mining and Safety Engineering, Shandong University of Science and Technology Qingdao 266590 Shandong Province China
State Key Laboratory of Mining Disaster Prevention and Control Co-found by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology Qingdao 266590 China.
RSC Adv. 2018 Mar 22;8(21):11498-11508. doi: 10.1039/c7ra12556a. eCollection 2018 Mar 21.
In this paper, a highly efficient and environmentally-friendly dust depressor was developed based on the sodium lignosulfonate-acrylic acid graft copolymer. Using the grafting ratio as an index, a three-factor and four-level orthogonal experiment was conducted to optimize the fabrication conditions of the graft copolymer. At a reaction temperature of 60 °C, feed ratio of 1 : 3, and FeSO·7HO content of 2.5%, the prototype produced the highest grafting ratio. The microstructure of the graft copolymer was measured using Fourier transform infrared spectrometry (FTIR) and nuclear magnetic resonance (H-NMR). Furthermore, the influence of glycerol and the JFC penetrant on the contact angle between the compound solution and coal powder was investigated. Finally, four formulas of dust depressor were selected based on the experimental results. The dust-control performance of the four dust depressors was then tested on a large-scale spray dust suppression simulation platform. The results show that after applying formula 1 at various distances from the spray field, the average dust reduction rates of the total dust (respirable dust) at each point increased. Compared to the water-spraying dust suppression technique, the dust concentration is significantly reduced after the graft copolymer dust depressor is applied.
本文基于木质素磺酸钠-丙烯酸接枝共聚物研制了一种高效环保的抑尘剂。以接枝率为指标，进行了三因素四水平正交试验以优化接枝共聚物的制备条件。在反应温度为60℃、进料比为1∶3、FeSO·7HO含量为2.5%时，制得的样品接枝率最高。采用傅里叶变换红外光谱（FTIR）和核磁共振（H-NMR）对接枝共聚物的微观结构进行了测定。此外，研究了甘油和JFC渗透剂对复合溶液与煤粉之间接触角的影响。最后，根据实验结果筛选出4种抑尘剂配方。然后在大型喷雾降尘模拟平台上测试了这4种抑尘剂的抑尘性能。结果表明，在喷雾场不同距离处喷施配方1后，各点的全尘（可吸入粉尘）平均降尘率均有所提高。与喷水降尘技术相比，应用接枝共聚物抑尘剂后粉尘浓度显著降低。
