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首页> 外文期刊>Journal of industrial and engineering chemistry >Preparation of CaCO3 using mega-crystalline calcite in electrical furnace and batch type microwave kiln
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Preparation of CaCO3 using mega-crystalline calcite in electrical furnace and batch type microwave kiln

机译：电炉和间歇式微波窑中用大晶体方解石制备CaCO3

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Mega-crystalline calcite (m-CC) breaks apart easily during calcination, and cannot be easily converted to CaO due to its characteristic that requires massive heat consumption. To solve this problem, the calcination characteristics were compared using electrical furnace (EF) and batch type microwave kiln (BM). After hydrating the manufactured CaO, Ca(OH)2 was produced, and through the carbonation process, CaCO3 was synthesized. The results of the XRD pattern of CaO that was formed through calcinations indicated that decarbonation reaction occurred as 98.2 wt.% by EF for 240 min, and 97.8 wt.% by BM for 30 min at the same temperature of 950 °C. Hydration results revealed that CaO by EF was high-reactive whereas CaO by BM was medium-reactive. CaCO3 was synthesized through the carbonation process. At 25 °C, in both cases, colloidal-shaped CaCO3 was found, and the more spindle-shaped CaCO3 by cubic-shaped self assembly was synthesized at higher temperatures. However, in case of EF, Ca(OH)2 existed in products. KMega-crystalline calcite;; Calcinations;; Hydration;; Carbonation;; Microwave;; Microwave kiln
机译：巨晶方解石（m-CC）在煅烧过程中容易破裂，并且由于其特性需要消耗大量热量，因此不易转化为CaO。为了解决该问题，使用电炉（EF）和间歇式微波窑（BM）比较了煅烧特性。水合制得的CaO后，生成Ca（OH）2，并通过碳酸化过程合成了CaCO3。通过煅烧形成的CaO的XRD图谱的结果表明，在950℃的相同温度下，脱碳反应以EF发生98.2wt。％发生240分钟，以BM发生97.8wt。％发生30分钟。水合结果表明，EF的CaO具有高反应性，而BM的CaO具有中等反应性。通过碳酸化过程合成了碳酸钙。在两种情况下，都在25°C下发现胶体形的CaCO3，并且在更高的温度下通过立方形自组装合成了更多纺锤形的CaCO3。但是，在EF的情况下，产物中存在Ca（OH）2。钾方解石;煅烧;水化;碳化;微波;;微波窑

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