융제 첨가 비산회의 융융성 연구

양현수; 이규철; 박주식; 손응권

Journal of the Korean Industrial and Engineering Chemistry, Vol.8, No.6, 985-993, December, 1997

Export Citation

융제 첨가 비산회의 융융성 연구

Studies on the Fusibility of Fly Ash-Flux Mixtures

양현수, 이규철, 박주식, 손응권

초록

구성분이 상이한 2종의 비산회를 대상으로 CaO와 MgO융제의 첨가시 용융온도변화에 대하여 고찰하였다. 용융온도측정을 위하여 ASTM 용융온도측정법과 시차열분석법이 사용되었다. CaO융제의 첨가시 시료에 따라 111∼294℃의 융점(IDT)강하효과를 얻을 수 있었으며 MgO첨가시에는 80∼224℃의 융점강하효과를 보였다. Base/Acid Ratio와의 비교에서 CaO flux는 0.7∼0.8, MgO flux는 0.3∼0.4의 범위에서 가장 낮은 용융온도로 측정되었다. 따라서 적은 첨가량으로도 MgO는 CaO보다 더 효과적인 융제로 작용하였다. 이러한 융제첨가시의 용융온도 변화는 용융성 분석에 보편적으로 사용되어지는 Base/Acid ratio와는 상관성이 없음을 알 수 있었고 XO-SiO₂-Al₂O₃ [X=Ca, Mg]삼성분계의 liquidus 온도와도 일치하지 않음을 알 수 있었다. 시차열분석결과와 ASTM용융온도와의 비교에서 용융성과 흐름성(점성)등의 물성이 복합적으로 반영되어 있는 ASTM측정법 보다는 시차열분석이 비산회의 순수한 용융온도를 분석할 수 있는 측정법임을 확인할 수 있었다.

The effects of CaO and MgO fluxes on the fusibility of fly-ashes were investigated for two different fly-ashes. A fusion temperature of mixtures of selected fly-ashes and fluxes were measured by the ASTM test method(D1857) and the differential thermal analysis. IDT of these samples added CaO and MgO as a fluxing agent dropped in the range of 114 to 294℃ and 80 to 224℃, respectively. Compared with ash fusion temperature to Base/Acid ratio, the lowest ash fusion temperature were measured in the range of 0.7 to 0.8 for CaO-fly ash mixtures and 0.3 to 0.4 for MgO-fly ash mixtures. As a result, MgO in small addition acted as a more effective flux than CaO. A conventional Base/Acid ratio and liquidus point of ternary diagram did not show a good correlation with ash fusion temperature for these samples. In pure fusion temperature of fly ash-mixtures, DTA was better method than ASTM test method.

[References]

Josch MG, Mater. Res. Soc. Symp. Proceed., 65 (1986)
남호기, "일본의 석탄회 재활용관련 조사보고서," 한국전력공사, H-1-9-82 (1993)
손재익, "청정석탄활용기술개발," KIER-941129, 481 (1994)
Manz OE, Cement Concrete Res., 14, 513 (1984)
Ashizawa M, "Establishiment of Gasifier Operation Index for Slag Discharging Performance," Yokosuka Research Laboratory Rep. No. EW91010 (1991)
Singer J, "Combustion Fossile Power Systems," Combustion Engineering Inc. (1981)
Barreff EP, "Chemistry of Coal Utilization," VOL. I (ed. H.H. Lowry), J. Wiley and Sons, New York, Chap. 15, 496 (1945)
Gray VR, Fuel, 66, 1230 (1987)
Winegartner EC, Rhodes BT, J. Eng. Power, 365 (1975)
Winegartner EC, Rhodes BT, J. Eng. Power, 395 (1975)
Bryers RW, Taylor TE, J. Eng. Power, 98, 1 (1976)
Park CS, Lee SH, Choi SI, Yang HS, J. Korean Ind. Eng. Chem., 8(2), 179 (1997)
Huggins FE, Huffman GP, Fuel, 60, 577 (1981)
Lee SH, Park JS, Energy Eng. J., 4, 42 (1995)
Huggins FE, Huffman GP, Dun-myre GR, Fuel, 60, 585 (1981)
Unuma H, Sayama S, Fuel, 65, 1505 (1986)
Hirato M, Ninomiya Y, World Congress Chem. Eng., 513 (1986)
Benson SA, "Inorganic Transformation and Ash Deposition during Combustion," ASME, 3 (1991)
Vorres KS, J. Eng. Power, 101, 497 (1979)
김병훈, "세라믹스 총론 下," 반도출판사, 203 (1995)

[Referenced By]

[1] Josch MG, Mater. Res. Soc. Symp. Proceed., 65 (1986)

[2] 남호기, "일본의 석탄회 재활용관련 조사보고서," 한국전력공사, H-1-9-82 (1993)

[3] 손재익, "청정석탄활용기술개발," KIER-941129, 481 (1994)

[4] Manz OE, Cement Concrete Res., 14, 513 (1984)

[5] Ashizawa M, "Establishiment of Gasifier Operation Index for Slag Discharging Performance," Yokosuka Research Laboratory Rep. No. EW91010 (1991)

[6] Singer J, "Combustion Fossile Power Systems," Combustion Engineering Inc. (1981)

[7] Barreff EP, "Chemistry of Coal Utilization," VOL. I (ed. H.H. Lowry), J. Wiley and Sons, New York, Chap. 15, 496 (1945)

[8] Gray VR, Fuel, 66, 1230 (1987)

[9] Winegartner EC, Rhodes BT, J. Eng. Power, 365 (1975)

[10] Winegartner EC, Rhodes BT, J. Eng. Power, 395 (1975)

[11] Bryers RW, Taylor TE, J. Eng. Power, 98, 1 (1976)

[12] Park CS, Lee SH, Choi SI, Yang HS, J. Korean Ind. Eng. Chem., 8(2), 179 (1997)

[13] Huggins FE, Huffman GP, Fuel, 60, 577 (1981)

[14] Lee SH, Park JS, Energy Eng. J., 4, 42 (1995)

[15] Huggins FE, Huffman GP, Dun-myre GR, Fuel, 60, 585 (1981)

[16] Unuma H, Sayama S, Fuel, 65, 1505 (1986)

[17] Hirato M, Ninomiya Y, World Congress Chem. Eng., 513 (1986)

[18] Benson SA, "Inorganic Transformation and Ash Deposition during Combustion," ASME, 3 (1991)

[19] Vorres KS, J. Eng. Power, 101, 497 (1979)

[20] 김병훈, "세라믹스 총론 下," 반도출판사, 203 (1995)