CAJ | 학술논문

模拟砖厂现行的烧结工艺,在800℃下,通过对石灰石细度为>-1Φ、>0Φ、>1Φ、>2Φ、>3Φ和>4Φ等6种系列的紫色砂页岩砖坯小样的室内烧结实验,获得了以下认识:1)石灰石细度是影响紫色砂页岩烧结砖质量的一个至关重要的因素.在不同细度下,烧结砖发生石灰爆裂的石灰石临界含量不同,并且其临界含量随着石灰石细度的增大而降低;2)石灰石细度不同,对烧结砖质量影响的方式也不同.粒度越粗,由游离CaO吸湿消解产生的膨胀应力越集中,越容易产生石灰爆裂现象;粒度越细,产生的膨胀应力越容易被分散,越有助于减弱或消除石灰爆裂的发生.另外,建立了石灰石细度与烧结砖发生石灰爆裂的石灰石临界含量之间的关系曲线,可为砖厂的现实生产提供指导.
모의전엄현행적소결공예,재800℃하,통과대석회석세도위>-1Φ、>0Φ、>1Φ、>2Φ、>3Φ화>4Φ등6충계렬적자색사혈암전배소양적실내소결실험,획득료이하인식:1)석회석세도시영향자색사혈암소결전질량적일개지관중요적인소.재불동세도하,소결전발생석회폭렬적석회석림계함량불동,병차기림계함량수착석회석세도적증대이강저;2)석회석세도불동,대소결전질량영향적방식야불동.립도월조,유유리CaO흡습소해산생적팽창응력월집중,월용역산생석회폭렬현상;립도월세,산생적팽창응력월용역피분산,월유조우감약혹소제석회폭렬적발생.령외,건립료석회석세도여소결전발생석회폭렬적석회석림계함량지간적관계곡선,가위전엄적현실생산제공지도.
At 800℃,simulating active sintering process of local brickards,through indoor sintering experiment on pint-sized adobes of purple sandy shale in which granularities of limestone are >-1Φ,>0Φ,>1Φ,>2Φ,>3Φ and >4Φ,respectively,this paper draws conclusions as follows:1) the fineness of limestone is a vital factor impacting on the quality of sintering bricks of purple sandy shale.In condition of different finenesses,the critical contents of limestone which causes lime burst in sintering bricks are distinct,and lower along with augment of the fineness of limestone;2) when the finenesses of limestone are variant,their influencing modes on the quality of sintering bricks are different too.The more coarse is the grain-size of limestone,the more concentrative is the swelling stress derived from reaction between free-CaO and H2O,the more serious is the lime burst of sintering bricks,and vice versa.In addition,relation curve between the fineness of limestone and the critical contents of limestone is established,and it may guide production of local brickards.