Synergistic Sintering of Multi-Source Petrochemical Wastes for High-Strength Ceramsite: Process Optimization and Environmental Safety
Yang Liu, Teng Wang, Jiayan Dang, Siwei Liu, Jiawei Hu, Yongjie Xue
TL;DR
This paper presents a new method to convert petrochemical waste into strong, eco-friendly building materials using optimized sintering.
Contribution
A novel synergistic sintering process is introduced to transform multi-source petrochemical wastes into high-strength ceramsite.
Findings
Optimal sintering conditions yielded ceramsite with 23.12 MPa compressive strength and low water absorption.
The product met Chinese structural material standards and immobilized heavy metals effectively.
Microstructural analysis revealed quartz, anorthite solid solution, hematite, and albite in the final product.
Abstract
The sustainable management of typical petrochemical hazardous wastes, such as oil sludge (OS), spent fluid catalytic cracking catalysts (SFCCs), and petrochemical-contaminated soil (PCS), poses a significant challenge. This study developed a synergistic sintering strategy that utilizes the complementary properties of these materials, with OS serving as an organic source, SFCCs and PCS providing an aluminosilicate framework, and waste glass powder (GP) acting as a fluxing agent to produce an environmentally friendly, high-strength ceramsite (OSPG-Opt). Single-factor experiments were first conducted to investigate the effects of OS content, sintering temperature, and duration. Subsequently, the Box–Behnken design was employed to optimize the process for maximizing aggregate strength. The optimal conditions were determined to be 30.5% OS content, a sintering temperature of 1142 °C, and a…
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Taxonomy
TopicsRecycling and utilization of industrial and municipal waste in materials production · Clay minerals and soil interactions · Concrete and Cement Materials Research