CAJ | 학술논문

由于青海地区海拔高，气压低于常压为0．77 atm，文章基于该气压条件下对粉煤灰碳热氯化提铝工艺的热力学进行分析，运用热力学软件 Factsage 针对工艺所涉及到的区域优势图、多元复杂体系平衡组分、氯化物间相图等方面进行计算模拟。结果显示，在适宜条件下，碳热氯化可以将原本不能直接与氯气反应的 Al2 O3和 SiO2完全转变成氯化物，证实了碳热氯化工艺的热力学可行性。Fe2 O3的碳热氯化产物 FeCl3（Fe2 Cl6）和 FeCl2的比例随着氯量和碳量的变化而变化。催化剂 Na2 CO3、CaCO3、B2 O3在反应中具有耗碳、耗氯的热力学副作用。氯化产物会对 AlCl3（Al2 Cl6）的挥发造成影响。相比常压地区，低于常压条件下的碳热氯化反应有优势也有劣势。通过研究与计算，为粉煤灰碳热氯化提铝工艺提供了热力学依据。
유우청해지구해발고，기압저우상압위0．77 atm，문장기우해기압조건하대분매회탄열록화제려공예적열역학진행분석，운용열역학연건 Factsage 침대공예소섭급도적구역우세도、다원복잡체계평형조분、록화물간상도등방면진행계산모의。결과현시，재괄의조건하，탄열록화가이장원본불능직접여록기반응적 Al2 O3화 SiO2완전전변성록화물，증실료탄열록화공예적열역학가행성。Fe2 O3적탄열록화산물 FeCl3（Fe2 Cl6）화 FeCl2적비례수착록량화탄량적변화이변화。최화제 Na2 CO3、CaCO3、B2 O3재반응중구유모탄、모록적열역학부작용。록화산물회대 AlCl3（Al2 Cl6）적휘발조성영향。상비상압지구，저우상압조건하적탄열록화반응유우세야유열세。통과연구여계산，위분매회탄열록화제려공예제공료열역학의거。
Because of the high altitude of Qinghai,its air pressure is 0.77 atm which is lower than the atmospheric pressure.Therefore,an analysis is done for carbochlorination reaction of flyash for the extraction of aluminum in such an environment.The phase diagrams and predominance area diagram on chlorides are calculated and drawn and the equilibrium compositions of complex system composed of multi‐components are simulated by Factsage software.Results show that,carbochlorination reaction converts Al2 O3 and SiO2 which can not directly react with chlorine gas originally to chloride completely,and this demonstrates the thermodynamics feasibility of carbochlorination process.The ratio of FeCl3 (Fe2 Cl6 )to FeCl2 changes with the amount of carbon and chlorine gas.The catalysts like Na2 CO3 ,CaCO3 and B2 O3 have some side effects in the aspect of thermodynamics such as consuming chlorine gas and carbon.The volatility of AlCl3 (Al2 Cl6 )is affected by other chlorides.Compared with the normal pressure region,there are advantages and disadvantages to carbochlorination reaction under the pressure below the normal.The work provides thermodynamic data for the process.