Roll compaction is an efficient pressure agglomeration technique for producing mechanically stable briquettes from fine particulate materials. Municipal sewage sludge represents one of the most challenging feedstocks for this process because of its high moisture content, heterogeneous composition and cohesive particle structure. In this study, composite briquettes consisting of municipal sewage sludge, waste quicklime and fine-grained hard coal were produced using an LPW 450 laboratory roller press in order to quantify the effects of feed composition and roll rotational speed on agglomerate quality. Three feed formulations were investigated over a range of roll operating speeds. Prior to briquetting, the raw materials were characterised by thermogravimetric (TG/DTA) and X-ray diffraction (XRD) analyses, while feed mixtures were evaluated using laboratory compression tests. Briquette quality was assessed in terms of density, drop resistance and compressive strength. The experimental results were further analysed using regression analysis, analysis of variance (ANOVA), Pearson correlation analysis, principal component analysis (PCA) and hierarchical clustering. Feed composition was identified as the dominant factor governing densification and mechanical performance, whereas roll rotational speed exerted a secondary but statistically significant influence associated with reduced residence time in the compaction zone. Increasing the proportion of coal fines improved particle packing but reduced the mechanical strength of the briquettes owing to dilution of the lime-sludge binding matrix. The results provide quantitative relationships between formulation, processing conditions and briquette properties that may support optimisation and industrial scale-up of roll compaction processes for composite waste-derived fuels.