Abstract

The chlorination titanium blast furnace slag belongs to industrial waste, but after grinding, they can be used to prepare cementing fluids to realize the secondary utilization of solid waste resources. As a common additive, fluid loss additives are mostly used in oil well cement systems, and there is still a lot of room for development when applied to chlorination titanium blast furnace slag systems. In this paper, the AMPS/DN-1/DMC/AA tetramer fluid loss additive was synthesized by free radical polymerization and named as ADDA. After testing its adsorption, hydration and plugging experiments, the TOC results showed that with the increase of ADDA, the organic carbon absorption increased from 5.68 mg/L to 34.59 mg/L; the BET results showed that, with the increase of ADDA, the specific surface area decreased from 15.3976 m³/g to 8.4157 m³/g. Combined with the microscopic morphology and other tests, it is shown that ADDA can effectively adsorb slag particles due to the electrostatic interaction of the sulfonic and carboxyl group in its molecular structure and the steric effect of the quaternary amine group. In addition, ADDA can promote the hydration reaction of the slag and entangle with the hydration products to form a complex network structure, thereby changing the filter cake structure to produce a dense and uniform filter cake; Polymer macromolecules can also effectively block the "gap" and "holes" in the structure, greatly reducing the flow path of free water, thereby realizing the control of water loss.

摘要

氯化钛高炉渣属于工业废弃物，但经磨细后可用于配制固井液，实现固废资源的二次利用。降滤失剂作为一种常用的添加剂，多用于油井水泥体系，应用于氯化钛高炉渣体系还有很大的发展空间。本文采用自由基聚合法合成了AMPS/DN-1/DMC/AA四聚体降滤失剂，命名为ADDA。经过对其吸附、水化和封堵实验的测试，TOC结果表明，随着ADDA的增加，有机碳吸附量从5.68 mg/L增加到34.59 mg/L；BET结果表明，随着ADDA的增加，比表面积从15.3976 m ³/g 至 8.4157 m ³ /g。结合显微形貌等试验表明，由于ADDA分子结构中磺酸基和羧基的静电相互作用以及季胺基团的空间位阻作用，ADDA能有效吸附渣粒。此外，ADDA能促进炉渣的水化反应并与水化产物缠结形成复杂的网络结构，从而改变滤饼结构，产生致密均匀的滤饼；高分子大分子还可以有效堵住结构中的“缝隙”和“孔洞”，大大减少自由水的流动路径，从而实现对失水的控制。