前言 七十年代我国在发展转炉耐火材料方面取得很大成绩,新产品不断出现,炉令显著提高。和转炉相比平炉相形见拙。从五十年代后期到现在,平炉未发展任何耐火材料新产品。但从七十年代开始,国内大型平炉普遍采用重油燃料和大量用氧,冶炼条件比五十年代后期要苛刻得多。因此,和六十年代比较国内大型平炉炉令都程度不同的有所下降。就 Foreword Seventies China has made great achievements in the development of refractory converter, new products continue to appear, the furnace ordered a significant increase. Compared with the converter and flat furnace see clumsy. From the late fifties to the present, Flat Furnace did not develop any new refractory products. However, since the 1970s, heavy oil fuels and large amounts of oxygen have been widely used in domestic large hearth furnaces, and the smelting conditions are much harsher than those in the late 1950s. As a result, the levels of domestic large-scale flat ovens have been somewhat lower than in the 1960s. on