作为在高温、减压操作条件下ＲＨ真空室下部所使用的内衬耐火材料而言 ,一般都是采用超高温烧成的直接结合镁铬砖 ,因而 ,要想大幅度提高其使用寿命确有困难。日本川崎炉衬耐火材料公司从节能、环保和提高ＲＨ脱气槽下部内衬使用寿命的目的出发 ,决定以ＭｇＯ -Ｃ砖取代原来所? As the lining refractory used in the lower part of the RH vacuum chamber under the conditions of high temperature and reduced pressure, it is generally the direct combination of magnesia-chrome bricks fired by ultra-high temperature. Therefore, in order to greatly improve the service life of the vacuum chamber, difficult. Kawasaki furnace lining refractory company from the energy saving, environmental protection and improve the lower part of the RH degassing tank liner purpose of life, decided to replace the original MgO-C brick?