高溫電熱管

,它包括電熱絲、填充料及護套管,特點是電熱絲采用鐵鉻鋁Cr23Al6或鐵鉻鋁0Cr21Al6Nb高溫級電熱合金材料,填充料采用復合電熔結晶氧化鎂粉,護套管采用耐熱鋼1Cr25Ni20Si2金屬材料;填充材料的配方為:菱苦土或鎂石80～99.8%、氮化硼(BN)0.1～10%、氧化鋰(LiO)0.1～10%;工藝為:將上述配方料投入單相電弧爐熔煉或投入三相電弧爐三爐熔煉,得到粉狀物質–復合電熔結晶氧化鎂粉。本發明通過對電熱管三種材料的改變,使得電熱管最高工作溫度可達到1100℃,既擴大了使用范圍,又延長了使用壽命。

High temperature electric heating?tube,?which comprises aheating wire,?filling and?casing,?is characterized byheating wire?made of Fe Cr al?Cr23Al6 or?Fe Cr al0Cr21Al6Nb?high temperature?electric heating alloy material,?the filling material is made of?composite electric melting?crystalline?magnesium oxide powder,?sheathing ofheat-resistant steel?1Cr25Ni20Si2 metal?material;?fillingmaterial:?magnesite?or magnesium?stone 80?~ 99.8%,boron nitride?(BN)?0.1?~ 10%,?0.1?~ 10%?lithium hydroxide?(LiO);?process is as follows:?the formulamaterials into a?single-phase electric arc furnace?smelting or?input?three-phase arc furnace?three?furnace smelting,powdery?substance —?composite electric meltingcrystalline?oxide?powder?obtained.?The invention of?theelectric heating tube?of three kinds of material?change,makes the?electric heating tube?maximum working temperature?can reach 1100 ℃,?which?enlarges the range of use,?and?prolong the service life.