CAJ | 학술논문

使用分析纯试剂配料,在1350℃保温1 h的条件下合成了A/S=5(Al2O3与SiO2质量比)的铝酸钙熟料.研究了钙铝比C/A(除去与SiO2结合的CaO后CaO与Al2 O3的摩尔比)对熟料中12CaO·7Al2 O3晶体结构及其氧化铝浸出性能的影响,并通过X射线衍射和X射线荧光等分析手段对其作用机理进行了探讨.结果表明：由于12CaO·7Al2 O3量的增加,C/A=1.0~1.4时,石灰烧结法熟料溶出率随着C/A的提高而提高；在C/A=1.4时,熟料溶出率最高可达93.30%,此时CaO的缺失形成了有缺陷的12CaO·7Al2 O3,且其中CaO的物质的量小于11.3 mol；钙铝比提高到1.7时熟料溶出率又出现了下降趋势,这是由于CaO的饱和导致12CaO·7Al2 O3晶体择优生长取向发生变化,由(211)面开始向(420)晶面转变.
사용분석순시제배료,재1350℃보온1 h적조건하합성료A/S=5(Al2O3여SiO2질량비)적려산개숙료.연구료개려비C/A(제거여SiO2결합적CaO후CaO여Al2 O3적마이비)대숙료중12CaO·7Al2 O3정체결구급기양화려침출성능적영향,병통과X사선연사화X사선형광등분석수단대기작용궤리진행료탐토.결과표명：유우12CaO·7Al2 O3량적증가,C/A=1.0~1.4시,석회소결법숙료용출솔수착C/A적제고이제고；재C/A=1.4시,숙료용출솔최고가체93.30%,차시CaO적결실형성료유결함적12CaO·7Al2 O3,차기중CaO적물질적량소우11.3 mol；개려비제고도1.7시숙료용출솔우출현료하강추세,저시유우CaO적포화도치12CaO·7Al2 O3정체택우생장취향발생변화,유(211)면개시향(420)정면전변.
Calcium aluminate clinkers, in which the mass ratio of Al2O3 to SiO2(A/S) is 5, were prepared at 1500℃ for 1 h by proportioning pure reagents. The alumina leaching properties and crystal structure of 12CaO·7Al2 O3 in the clinkers with different molar ratios of CaO unbonded with SiO2 to Al2 O3 ( C/A) were studied. The effect mechanism of C/A on the clinkers was also discussed by X-ray diffraction and X-ray fluorescence analysis. When C/A is 1. 0 to 1. 4, the alumina-leaching ratio improves because the amount of 12CaO·7Al2O3 increases with increasing C/A. When C/A is 1. 4, the alumina-leaching ratio reaches the maximum value of 93. 30%. In this case, 12CaO·7Al2 O3 with defects forms, and the amount of substance of CaO is less than 11. 3 mol. With the further increase of C/A, the alumina-leaching ratio decreases, which is because the preferred orientation of 12CaO·7Al2 O3 changes from the (211) crystal plane into the (420) crystal plane.