CaC2 Production from Pulverized Coke and CaO at Low Temperatures—Influence of Minerals in Coal-Derived Coke
CaC2 Production from Pulverized Coke and CaO at Low Temperatures—Influence of Minerals in Coal-Derived Coke
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DOI：
10.1021/ie3006726
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发表时间：
2012-08
影响因子：
4.2
通讯作者：
Guodong Li;Qingya Liu;Zhenyu Liu
中科院分区：
文献类型：
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作者：
Guodong Li;Qingya Liu;Zhenyu Liu
与传统的电弧法从焦炭和CaO中生产CaC2相比，自热法需要更少的能量。然而，由于焦炭中存在矿物质（或灰分），用于就地产热的焦炭会在反应器中产生更多的矿物质。本文研究了煤焦中常见的矿物（Fe2O3、MgO、SiO2和Al2O3）对CaC2形成的影响。还评价了在某些电弧工艺中使用的添加剂CaF2对CaC2生产的影响。结果表明，Fe2O3和MgO对CaC2的形成影响不大。在低于1460℃的温度下，SiO2和Al2O3不与焦炭反应，但它们与CaO反应，分别形成Ca3SiO5和Ca2Al2O5，或在两者存在的情况下形成铝硅酸盐钙。所有这些含钙化合物都能与C反应生成CaC2，但反应速率低于CaO，并且消耗更多的C（生成CO）。CaF2对CaC2形成的影响较小。
Compared to the traditional electric arc process for the production of CaC2 from coke and CaO, the autothermal process requires less energy. However, the coke used for in situ heat generation results in more minerals in the reactor, because of the presence of minerals (or ash) in coke. This paper studies the influence of minerals (Fe2O3, MgO, SiO2, and Al2O3) commonly found in coal-derived coke on the formation of CaC2. The effect of CaF2, which is an additive used in some of the electric arc processes, on CaC2 production is also evaluated. The results show that Fe2O3 and MgO have little influence on CaC2 formation. SiO2 and Al2O3 do not react with coke at temperatures lower than 1460 °C, but they do react with CaO to form Ca3SiO5 and Ca2Al2O5, respectively, or calcium aluminosilicates in the presence of the both. All these Ca-containing compounds are able to react with C to form CaC2 but at rates lower than that of CaO and consume more C (to form CO). CaF2 has little influence on CaC2 formation in terms ...