환원 조건에서 석탄 슬래그의 Tcv 예측Prediction of Tcv for Coal Slags under Reducing Condition
- Other Titles
- Prediction of Tcv for Coal Slags under Reducing Condition
- Authors
- 오명숙; 박윤경
- Issue Date
- 2006
- Publisher
- 한국화학공학회
- Keywords
- Slag; Viscosity; Tcv; Prediction; FactSage1. . .... ... ..; .....; .....; ... .. ... .... .. .... H2. CO. ..... .... .... [1]. ..... ..... .... .......(integrated gasification combined cycle; IGCC). ... ..... .. .. ... ... 21... ..... .... ......
- Citation
- Korean Chemical Engineering Research(HWAHAK KONGHAK), v.44, no.6, pp.623 - 630
- Journal Title
- Korean Chemical Engineering Research(HWAHAK KONGHAK)
- Volume
- 44
- Number
- 6
- Start Page
- 623
- End Page
- 630
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/24637
- ISSN
- 0304-128X
- Abstract
- slag viscosity is an important factor determining the operation temperature of entrained flow type ofgasifiers. The temperature of critical viscosity, Tcv, for 5 crystalline slags was predicted by empirical models and Fact-Sage equilibrium calculations, and the validity of each method was tested. Two empirical models were employed: oneusing Th from the ash fusion test, and the other using the concentrations of 5 major components. The first model usingTh over-predicted Tcv by 20~100oC, while the model based on the slag composition under-predicted Tcv by 80~120oC.In the equlibrium calculations, Tcv was obtained from the liquidus temperature. When the 4-major component concen-trations were used in the calculation, the predicted temperatures were higher than the observed. The liquidus tempera-ture was very sensitive to the concentrations of minor components, and the addition of MgO and Na2liquidus temperature. The results with 4 major and 3 minor components most closely described experimentally observedTcv. In the case that a chromia refractory was used, it was shown that Cr2O3 concentration in the slag also needs to beincluded for more acurate prediction of Tcv.
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