“七五”期间国家经委组织有关研究所和电炉厂,成功地设计出SX_2、SG_2系列节能型电炉,并规定相应的SX、SR、及SG、SRJG系列老产品均淘汰。目前有些企业单位和科研机构因资金来源困难,仍使用着淘汰产品。为此,351厂采用了新的节能材料,改造这些老设备。经改造后,不但达到 During the “Seventh Five-Year” period, the State Economic Commission organized relevant research institutes and electric furnace factories to successfully design SX_2 and SG_2 energy-saving electric furnaces and stipulated that the corresponding SX, SR, SG and SRJG series of old products were eliminated. At present, some enterprises and research institutes still use obsolete products because of the difficulty of funding sources. To this end, 351 uses a new energy-saving materials, transformation of these old equipment. After the transformation, not only reached