推荐回答(1个)
耐火砖是高温工业窑炉内衬的核心材料,在施工砌筑时特别注重施工的技术要求,在砌筑工业炉前,应根据砌体设计,通过试验确定泥浆的稠度和液体加入量,同时检查泥浆的砌筑性能(粘结时间)是否满足砌筑要求。泥浆的粘结时间是耐火制品的材质,外形尺寸的大小而定,宜为1~1.5min。不同的耐火砖砌体,应选择不同的耐火泥浆砌筑。
在砌筑耐火砖之前要做好 砌筑人员的安全防范培训 、施工器具的到位、水电通畅工作,并按照以下的要求进行施工。
(1)砌筑耐火砖钱,应根据设计要求由测量准确放出炉子中心和标高核查砌体的各部位尺寸和相关标高。
(2)耐火砖砌体应错缝砌筑,砌体砖缝内泥浆应饱满,表面应勾缝。干砌时,除按设计规定外,一般应以干耐火粉填满。
(3)不得在耐火砖砌体上砍凿砖,砌砖时,应用木锤和橡胶锤找正。泥浆干凅后,不得敲打砌体。
(4)砖的加工面不宜朝向炉膛和炉子通道内表面或膨胀缝。
(5)砌砖中断或返工拆砖时,应作成阶梯形的斜槎。
(6)耐火砖砌体的加工砖,不得使用加工成宽度小于1/2的砖或厚度小于2/3的砖。
(7)组合砖应按其组装的内径、尺寸和标高进行“对号入座”砌筑。
(8)烟道与烟囱或其他建筑物间4设有沉降缝时,才允许砌筑烟道。沉降缝应防止透气和渗水。
(9)地下烟道的拱顶,只有在墙外回填土后,才可打入锁砖。
(10)耐火砌体和隔热砌体,从施工到投入生产的过程中,应预防受湿。
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