Single-stage mineral carbonation is undertaken at relatively high pressures (up to 18 MPa) and high temperatures (up to 185 °C), where in contrast, two-stage mineral carbonation operates at low pressures (<1 MPa) and mild temperatures (<100 °C). This article describes the development of concurrent grinding for application during the initial dissolution stage of the two-stage aqueous mineral carbonation, using heat activated lizardite as feed ore. Various grinding media sizes and concentrations were studied, with 60 wt% grinding media being determined as optimum and engendering 65 % of the Mg in the feed ore being extracted in 2 h compared to 38 % in reference experiments. Mg extraction using a 30 wt% grinding media and in reference experiments were essentially identical, indicating that the use of 30 wt% media is ineffective. Silica-rich layers were observed to be present in the product produced in experiments using 30 wt% media, explaining why the extent of Mg extraction was similar in both experiments.

Multi-stage grinding was investigated in an effort to obtain a higher level of Mg extraction. However, it was observed that the average particle size of the ground product increased during the second stage of multi-stage grinding. It is suggested this increase in the average particle size limited the extent of extraction during the second phase of grinding. The particle size increase was determined to be due to the agglomeration of fines and subsequently polyacrylic acid, a commercially available grinding media aid was applied in order to reduce the extent of agglomeration.

单级矿物碳酸化是在相对较高的压力（最高18 MPa）和高温（最高185°C）下进行的，相比之下，两级矿物碳酸化是在低压（<1 MPa）和温和的温度（ <100°C）。本文介绍了使用热活化的蜥蜴石作为进料矿石在两阶段含水矿物碳酸化的初始溶解阶段中同时研磨的应用开发。研究了各种研磨介质的尺寸和浓度，确定最佳研磨介质为60 wt％，并在2小时内提取了进料矿石中65％的Mg，而参考实验中为38％。使用30 wt％的研磨介质进行的镁提取与参考实验基本相同，这表明使用30 wt％的介质无效。

为了获得更高水平的Mg提取，研究了多阶段研磨。但是，观察到在多阶段研磨的第二阶段中，研磨产物的平均粒径增加。建议平均粒度的增加限制了研磨第二阶段的提取程度。确定粒度增加是由于细粒和随后的聚丙烯酸的团聚引起的，为了降低团聚程度，使用了可商购的研磨介质助剂。