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拱(gong)角(jiao)(jiao)(jiao)(jiao)(jiao)磚的生產與(yu)使(shi)用(yong)(yong)是(shi)為了(le)方便在砌筑窯(yao)爐過程中(zhong)，遇到有(you)夾角(jiao)(jiao)(jiao)(jiao)(jiao)或平角(jiao)(jiao)(jiao)(jiao)(jiao)時(shi)候(hou)需要砌筑拱(gong)形頂的要用(yong)(yong)來當襯磚使(shi)用(yong)(yong)，所以拱(gong)角(jiao)(jiao)(jiao)(jiao)(jiao)磚的形狀從T-46到T-63的型(xing)號都近似于梯形磚，任何一(yi)(yi)個(ge)拱(gong)角(jiao)(jiao)(jiao)(jiao)(jiao)磚事實上都包括一(yi)(yi)個(ge)直角(jiao)(jiao)(jiao)(jiao)(jiao)三角(jiao)(jiao)(jiao)(jiao)(jiao)形，即(ji)拱(gong)角(jiao)(jiao)(jiao)(jiao)(jiao)磚有(you)兩(liang)個(ge)互為余(yu)角(jiao)(jiao)(jiao)(jiao)(jiao)的傾(qing)斜角(jiao)(jiao)(jiao)(jiao)(jiao)。