The chemical binder is one of the critical factors affecting ore agglomeration behavior and leaching efficiency. In this study, we investigated the effect of the type of binder and mass fraction of the H₂SO₄ solution used on the curing, soaking, and leaching behavior of agglomerations. The results revealed that Portland cement (3CaO·SiO₂, 2CaO·SiO₂, and 3CaO·Al₂O₃) was the optimal binder for obtaining a well-shaped, stable agglomeration structure. A higher extraction rate was achieved when using Portland cement than that obtained using sodium silicate, gypsum, or acid-proof cement. An excessive geometric mean size is not conducive to obtaining well-shaped agglomerations and desirable porosity. Using computed tomography (CT) and MATLAB, the porosity of two-dimensional CT images in sample concentrations L1–L3 was observed to increase at least 4.5vol% after acid leaching. Ore agglomerations began to be heavily destroyed and even to disintegrate when the sulfuric acid solution concentration was higher than 30 g/L, which was caused by the excessive accumulation of reaction products and residuals.

化学结合剂是影响矿石团聚行为和浸出效率的关键因素之一。在本研究中，我们研究了粘合剂类型和所用 H ₂ SO ₄溶液的质量分数对团聚体的固化、浸泡和浸出行为的影响。结果表明，硅酸盐水泥（3CaO·SiO ₂、2CaO·SiO ₂和3CaO·Al ₂ O ₃) 是获得形状良好、稳定的团聚结构的最佳粘合剂。与使用硅酸钠、石膏或耐酸水泥相比，使用波特兰水泥可获得更高的萃取率。过大的几何平均尺寸不利于获得形状良好的团聚体和理想的孔隙率。使用计算机断层扫描 (CT) 和 MATLAB，观察到样品浓度 L1-L3 中二维 CT 图像的孔隙率在酸浸后增加至少 4.5vol%。当硫酸溶液浓度高于 30 g/L 时，矿石团块开始被严重破坏甚至崩解，这是由于反应产物和残留物的过度积累造成的。