不同水煤浆添加剂与煤之间的相互作用规律研究——分散剂用量对水煤浆流变特性的影响(Ⅳ)

Study of Interaction Features Between Different CWS Dispersants and Coals——Effect of Dispersant Dosage on CWS Rheological Behavior(Ⅳ)

用6种分散剂和6种不同变质程度的煤进行了成浆实验以研究分散剂的用量对水煤浆(CWS)流变特性的影响.结果表明,分散剂的种类和用量不仅影响CWS的表观黏度而且还影响其流变特性.分散剂用量过多或过少都会增加CWS的表观黏度,但不同分散剂的最佳用量范围不同,这主要取决于分散剂的结构、性质及其与煤粒间的相互作用特征.分散剂用量主要关系到煤粒表面改性的程度;分散剂的种类主要影响到改性煤粒表面的结构特征.

Influence of dispersant dosage on CWS rheological behavior was studied using 6 Chinese coals and 6 dispersants. The results show that the dispersant and its dosage not only influence the apparent viscosity but also the rheological behavior of CWS. Surplus or scanty dispersant dosage will increase the apparent viscosity of CWS. But the optimal dosage is different for different dispersants mainly because their structures, properties, and interaction characteristic between coal particles and dispersants are different. The usage of dispersant has much to do with the extent of dispersant-modified property of coal particles. The type of dispersant mainly influence the surface structure characteristic of coal particle.