CAJ | 학술논문

在对铁尾矿、黏土、煤矸石等原料性质进行分析的基础上，按照一定配比制备烧结砖，考察了铁尾矿掺加量及烧成制度对烧结砖性能的影响。结果表明，铁尾矿掺加量、烧成温度、保温时间均对烧结砖性能有较大影响。随着铁尾矿掺加量从20%增加到55%，烧结砖体积密度变化不大，吸水率和抗压强度逐渐减小；随着烧成温度的升高，烧结砖试样体积密度、吸水率逐渐减小，抗压强度逐渐增大；随着保温时间的延长，烧结砖试样抗压强度逐渐增大，体积密度和吸水率变化不大。烧结砖试样有轻微泛霜现象和一定的石灰爆裂现象，当烧成温度低于900℃时，石灰爆裂现象更严重。制备烧结砖的最优条件为：铁尾矿掺加量45%、烧成温度1000℃、保温时间120 min；烧结砖强度达到GB5101-2003强度等级MU20要求。
재대철미광、점토、매안석등원료성질진행분석적기출상，안조일정배비제비소결전，고찰료철미광참가량급소성제도대소결전성능적영향。결과표명，철미광참가량、소성온도、보온시간균대소결전성능유교대영향。수착철미광참가량종20%증가도55%，소결전체적밀도변화불대，흡수솔화항압강도축점감소；수착소성온도적승고，소결전시양체적밀도、흡수솔축점감소，항압강도축점증대；수착보온시간적연장，소결전시양항압강도축점증대，체적밀도화흡수솔변화불대。소결전시양유경미범상현상화일정적석회폭렬현상，당소성온도저우900℃시，석회폭렬현상경엄중。제비소결전적최우조건위：철미광참가량45%、소성온도1000℃、보온시간120 min；소결전강도체도GB5101-2003강도등급MU20요구。
Fired bricks were prepared with iron tailings, clay and coal gangue based on analysis of the basic characterizations. The test investigated the inlfuence of iron tailings content and ifring system on the performance of ifred bricks. The results showed that the content of iron tailings and temperature had important inlfuence on the performance of ifred bricks. The water absorption and compressive strength were reduced when the content of iron tailings increased from 20%to 55%, while the volume density had a little change. The volume density and water absorption were decreased;the compressive strength was increased with the rise of ifring temperature. When the holding time was prolonged, the compressive strength was gradually increased and the volume density and water absorption had a little change. When the ifring temperature was below 900℃, the ifred bricks produced many fractures and it is known as“lime blowing”. The optimal condition of ifred brick preparation was:the content of iron tailings 45%, ifring temperature 1000℃, the holding time 120 min. The compressive strength of ifred brick reached the requirements of GB5101-2003 strength grade MU20.