Abstract This study is focused on the conversion of harmful materials (calcium carbide slag [CCS] and flue gas) into CaCO3 particles through an accelerated mineral carbonation process. The influences of reaction temperature, amount of Na-oleate, solid-to-liquid ratio, and stirring speed on the properties of CaCO3 particles were determined using XRF, XRD, SEM, FTIR, TG, and contact angle measurements. Experiments were designed based on an orthogonal array L9 (34) of the Taguchi approach. The gas mixture of CO2/N2 (16.3% of CO2 cons.) gas was used to represent the flue gas for each experiment. The formation of CaCO3 particles from CCS depending on time was monitored via SEM. Experiments showed that the presence of Na-oleate in the slurry played a curial role in the carbonation process, and the conversion ratio of CO2 into a solid carbonate phase was higher than that in the experiments conducted without Na-oleate. The crystallite size of CaCO3 particles varied between 11.55 and 38.11 nm depending on the production conditions. Each obtained CaCO3 particles were identified as calcite (cubic-like rhombohedral), which is in high demand in many industrial applications.

中文翻译：

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使用田口方法从电石渣合成方解石颗粒，通过加速矿物碳化固定 CO 2

摘要 本研究的重点是通过加速矿物碳化过程将有害物质（电石渣 [CCS] 和烟道气）转化为 CaCO3 颗粒。使用XRF、XRD、SEM、FTIR、TG和接触角测量方法确定了反应温度、油酸钠用量、固液比和搅拌速度对CaCO3颗粒性质的影响。实验是基于田口方法的正交阵列 L9 (34) 设计的。CO2/N2 的气体混合物（CO2 排放量的 16.3%）用于代表每个实验的烟道气。通过 SEM 监测从 CCS 形成的 CaCO3 颗粒随时间的变化。实验表明，浆液中油酸钠的存在在碳酸化过程中起到了重要的作用，CO2 转化为固体碳酸盐相的转化率高于没有油酸钠的实验。根据生产条件，CaCO3 颗粒的微晶尺寸在 11.55 和 38.11 nm 之间变化。每个获得的 CaCO3 颗粒都被鉴定为方解石（类立方菱形），这在许多工业应用中都有很高的需求。