拱(gong)角(jiao)(jiao)磚(zhuan)的(de)(de)生(sheng)產與(yu)使(shi)用(yong)是為了方便(bian)在(zai)砌筑窯爐(lu)過程中,遇到有(you)夾角(jiao)(jiao)或平角(jiao)(jiao)時候需(xu)要砌筑拱(gong)形(xing)頂的(de)(de)要用(yong)來當襯磚(zhuan)使(shi)用(yong),所以拱(gong)角(jiao)(jiao)磚(zhuan)的(de)(de)形(xing)狀從(cong)T-46到T-63的(de)(de)型號都近(jin)似于(yu)梯形(xing)磚(zhuan),任何一個拱(gong)角(jiao)(jiao)磚(zhuan)事實上都包括一個直角(jiao)(jiao)三角(jiao)(jiao)形(xing),即拱(gong)角(jiao)(jiao)磚(zhuan)有(you)兩個互為余角(jiao)(jiao)的(de)(de)傾斜角(jiao)(jiao)。