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 关于电阻炉的简单介绍

关于电阻炉的简单介绍:
A brief introduction about resistance furnace:
以电流通过导体所产生的焦耳热为热源的电炉。按电热产生方式,电阻炉分为直接加热和间接加热两种。在直接加热电阻炉中,电流直接通过物料,因电热功率集中在物料本身,所以物料加热很快,适用于要求快速加热的工艺,例如锻造坯料的加热。山东电炉
In current through a conductor joule heat generated by the electric furnace for the heat source. According to the electric heating way, resistance furnace is divided into two directly heating and indirectly heating. In direct heating resistance furnace, current directly through the material, because of electric power concentrated in the material itself, so the material heat quickly, is suitable for the requirements of rapid heating process, such as forging billet heating.
这种电阻炉可以把物料加热到很高的温度,例如碳素材料石墨化电炉,能把物料加热到超过2500℃。直接加热电阻炉可作成真空电阻加热炉或通保护气体电阻加热炉,在粉末冶金中,常用于烧结钨、钽、铌等制品。采用这种炉子加热时应注意:
The resistance furnace can be heated to very high temperatures, the supplies graphitizing furnace carbon materials, for example, can put the material to the heated above 2500 ℃. Directly is made vacuum resistance furnace heat resistance or protective gas resistance furnace, heating furnace in powder metallurgy, commonly used in sintering tungsten, tantalum, niobium and other products. Using this stove heating should be paid attention to:
①为使物料加热均匀,要求物料各部位的导电截面和电导率一致;
(1) to make the material is heated evenly to each part of the material of conductive section and conductivity is consistent;
②由于物料自身电阻相当小,为达到所需的电热功率,工作电流相当大,因此送电电极和物料接触要好,以免起电弧烧损物料,而且送电母线的电阻要小,以减少电路损失;
(2) due to the resistance material itself is fairly small, to achieve the required heating power, working current is quite big, therefore power electrode and material contact is better, so as to avoid the arc burning material, and the resistance of the power bus, to reduce the circuit loss;
大部分电阻炉是间接加热电阻炉,其中装有专门用来实现电-热转变的电阻体,称为电热体,由它把热能传给炉中物料。
Most of the resistance furnace is indirect heating resistance furnace, which is equipped with dedicated to the realization of electrical and thermal transition resistance, called the electric heating body, by its pass in the furnace the heat materials.
这种电炉炉壳用钢板制成,炉膛砌衬耐火材料如陶瓷纤维,内放物料。
This kind of electric furnace shell made of steel plate, build by laying bricks or stones of the chamber of a stove or furnace lining refractory materials such as ceramic fiber, put inside the material.
最常用的电热体是铁铬铝电热体、镍铬电热体、碳化硅棒和二硅化钼棒,硅碳棒、二硼化锆陶瓷复合发热体。根据需要,炉内气氛可以是普通气氛、保护气氛或真空。
The most commonly used electric heating body is iron chromium aluminum electric heating body, nickel chromium, silicon carbide rods and molybdenum disi1icide electric heating body, silicon carbide, zirconium boride ceramic composite heating element. According to need, furnace atmosphere, protective atmosphere or vacuum can be a normal atmosphere.
一般电源电压220伏或380伏,必要时配置可调节电压的中间变压器。小型炉(<10千瓦)单相供电,大型炉三相供电。对于品种单一、批料量大的物料,宜采用连续式炉加热。
The general power supply voltage 220 v or 380 v, the middle of the configuration of adjustable voltage transformer when necessary. Small furnace (< 10 kw) single-phase power supply, three-phase power supply large furnace. For varieties of a single, large batch of shoes materials, appropriate USES continuous heating furnace.
炉温低于700□的电阻炉,多数装置鼓风机,以强化炉内传热,保证均匀加热。
Temperature is below 700 - resistance furnace, most device blower, with enhancing heat transfer in furnace, ensure uniform heating.
用于熔化易熔金属(铅、铅铋合金、铝和镁及其合金等)的电阻炉,可做成坩埚炉;或做成有熔池的反射炉,在炉顶上装设电热体。电渣炉是由溶渣实现电热转变的电阻炉(见电渣重熔)。
Used to melt fusible metal (lead, lead, bismuth alloys, aluminum and magnesium and its alloys, etc.) of the resistance furnace, can make a crucible furnace; Or make it have a reverberatory furnace of molten pool, installing electric heating body on top. Electroslag furnace is made of slag change electric resistance furnace (esr).

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