基于多重光散射原理的水煤浆稳定性分析研究

利用Turbiscan Lab稳定性分析仪的多重光散射技术研究了萘系与木质素系分散剂对水煤浆中煤颗粒的沉降及浆体稳定性的影响。结果表明，煤颗粒间的聚结是引起差异沉降的直接因素，进而影响水煤浆的稳定性，各浆体在7 d内背散射光通量BS的变化均低于0.9%，未产生硬沉淀，浆体中煤颗粒团聚体的平均粒径随着静置时间的延长而逐渐增加，静置初期与分散剂配比之间的变化规律不明显，1 d后随木质素系分散剂添加量的增加而减小，TSI值呈梯度递减趋势，稳定性逐渐增加，进一步证实了煤颗粒间的聚结是水煤浆稳定性的主要影响因素。Turbiscan Lab稳定性分析仪可以实现对水煤浆稳定性及沉降过程的实时分析，为分散剂的种类及用量的选择提供可靠的数据支撑。

Research on the stability of CWS based on the multiple light scattering principle

Effect of naphthalene series and lignin series dispersants on the sedimentation of coal particles and the stability of coal water slurry (CWS) were investigated using the multiple light scattering technique of Turbiscan Lab stability analyzer.The results show that coalescence between coal particles is the direct factor which causes differential sedimentation，and influences the stability of CWS.The variation of backscattering luminous flux is lower than 0.9%，and the CWS does not produce hard sedimentation in seven days.The average size of coal particle increases gradually along with the extension of standing time.The change rule is not obvious between average size and the ratio of compounded dispersants in the early standing time，but the average size decreases with the increase of additional amount of lignin series dispersants，TSI value shows a decreasing trend，and the stability of CWS increases gradually，which further confirmed the coalescence between coal particles is the main factor that influence the stability of CWS.Turbiscan Lab stability analyzer can realize real-time analysis on the stability and sedimentation process of CWS，and provide reliable data support for the selection of appropriate dispersant and its dosage.