中频感应电炉具有占地面积小，加热速度快，氧化脱碳少，节能环保等优点。中频感应电炉在重熔碳铬粉时要求炉衬材料应具有良好的耐火度，物化稳定性好，耐急冷急热，具有较好高温强度，良好的导热性。炉衬材料性能的好坏是炉衬寿命长短的关键。镁砂粗粒度越多，炉衬气孔率越小，耐压强度愈高，稳定性愈好。实践中发现:粗粒度比例过大，炉衬烧结性能差;粗粒度比例过小，气孔率大，易产生裂纹，从而导致炉衬寿命缩短，故粗细镁砂应搭配合适。要提高中频感应电炉炉衬的使用寿命要主要中频感应电炉安全操作。 Medium frequency induction furnace with cover an area of an area small, heating speed, less oxidation decarburization, energy conservation, environmental protection, etc. Medium frequency induction furnace during remelting carbon chromium powder for lining material should possess good refractoriness and physical and chemical stability, resistance to thermal shock, has good high temperature strength, good thermal conductivity. Properties of lining materials and quality is the key to the length of the lining life. Magnesia coarse granularity, the furnace lining, the smaller the porosity, the higher the compressive strength and better stability. Practice indicate that the proportions of the coarse granularity is too large, lining sintering performance is poor; Coarse-grained scale is too small, porosity is big, easy to crack, resulting in lining life shortened, so the thickness of magnesia should fit. To improve the service life of the intermediate frequency induction furnace lining to main intermediate frequency induction furnace safety operation. 　　安全操作 Safe operation 　　1、开炉前要检查好电气设备、水冷却系统、感应器铜管等是否完好否则禁止开炉。 1, check things out before blowing in electrical equipment, water cooling system, sensor brass etc are in good condition  otherwise prohibited furnace. 　　2、炉膛熔损超过规定应及时修补。严禁在熔损过深坩埚内进行熔炼。 2, furnace melting in excess of the prescribed shall promptly repair. It is strictly prohibited in melting too deep inside the crucible for melting. 　　3、送电和开炉应有专人负责送电后严禁接触感应器和电缆。当班者不得擅自离开岗位，要注意感应器和坩埚外部情况。 3, sending and furnace should have someone who's in charge of  electric transmission is strictly prohibited contact sensors and cables. On duty shall not leave post, pay attention to the sensor and external circumstance of crucible. 　　4、装料时，应检查炉料内有无易燃易爆等有害物品混入，如有应及时除去，严禁冷料和湿料直接加入钢液中，熔化液充满至上部后严禁大块料加入，以防结盖。 4, loading, should check harmful items such as burden in presence of flammable and explosive mixed with, if you have to remove timely, it is forbidden to cold and wet material directly add to the liquid steel, melted liquid filled with first division after it is forbidden to chunk is expected to join in case cover. 　　5、补炉和捣制坩埚时严禁铁屑、氧化铁混杂，捣制坩埚必须密实。 5, and tamped crucible, scrap iron, iron oxide are forbidden to mix, rammed crucible must be compact. 　　6、浇注场地及炉前地坑应无障碍物，无积水以防钢水落地爆炸。 6, pouring fields and official pit furnace should have no obstacle, no water to prevent steel landing explode. 　　7、钢水不允许盛装得过满，手抬包浇注时，二人应配合一致，走路应平稳，不准急走急停，浇注后余钢要倒入指定地点，严禁乱倒。 7, molten steel are not allowed to dress too full, hand carry bags when pouring, two of them should be conformed to walk should be smooth, not allowed to walk fast abrupt stop, after pouring yu gang in a designated place, it is forbidden to dump. 　　8、中频发电机房内应保持清洁，严禁易燃易爆物品和其它杂物带进室内，室内禁止吸烟 8, intermediate frequency generator room should be kept clean, it is strictly prohibited flammable and explosive goods and other debris into indoor, indoor smoking ban