拱(gong)角(jiao)(jiao)磚的(de)生產與使(shi)用(yong)是為(wei)了方便在砌筑(zhu)窯爐過(guo)程中,遇到有夾角(jiao)(jiao)或平角(jiao)(jiao)時(shi)候需要(yao)(yao)砌筑(zhu)拱(gong)形頂的(de)要(yao)(yao)用(yong)來當襯磚使(shi)用(yong),所(suo)以(yi)拱(gong)角(jiao)(jiao)磚的(de)形狀從T-46到T-63的(de)型(xing)號都(dou)近似于(yu)梯形磚,任何一(yi)個拱(gong)角(jiao)(jiao)磚事(shi)實上都(dou)包括一(yi)個直角(jiao)(jiao)三角(jiao)(jiao)形,即拱(gong)角(jiao)(jiao)磚有兩個互為(wei)余(yu)角(jiao)(jiao)的(de)傾(qing)斜角(jiao)(jiao)。