前者一般用于涛造合金材料，后者用于精炼钢材多，可以做到几十吨的电渣炉，中频熔化炉一般没有那么大，很少超过十吨的中频熔化炉。中频熔化炉与电渣重熔炉它们使用的频率不一样，中频熔化炉的频率比工频炉的频率要高。 中频熔化炉利用此热量使金属加热熔化，从而达到熔化的目的。 其主要特点如下: 1、熔化金属受到电磁力作用熔化金属受到电磁力作用产生强烈搅拌，这是中频熔化炉的一个主要特点，液态金属运动（搅拌）从熔池的中央开始，向线圈两端移动，由于金属受炉底和炉壁的约束，因而最终的运动总是向上，在炉池的顶部形成一个驼峰。 2、中频熔化炉重熔属间断熔炼 熔炼开始阶段，整个待熔金属料是由小块炉料组成，由于加料方式等问题，加料密度仅为炉子容量的1/3左右，这时，炉料是一个非常差的电负载，向炉子输入功率时，单块炉料之间会起弧并且焊在一起，一旦焊一起，整炉炉料就会形成很大的一块，因而炉子效率提高。 中频熔化炉出来的比精炼炉的便宜800-1000不等。主要是中频熔化炉的设备实在太便宜了，一般几万块即可，有些转让的更便宜，如果能在电价上享受到优惠则炼钢的成本更低。但随着规模经济效应的体现和政府的控制，相信，在不久的将来，中频熔化炉会退出历史的舞台。所以，用中频熔化炉炼钢对原料要求高，而且成分不易控制，首先体现在含碳量的控制上，因为不能形成AOD似的真空状况，即便原料能控制到极致，中频熔化炉的含碳量也很难控制在0.03%以下，另外，没有脱硫除磷的工艺，一般也不能将原料中的硫磷等有害元素清除。所以，当选择304L、316L时，中频熔化炉是排除在外的，特别是在做出口产品时， 中频熔化炉出来的扁钢、圆钢都会存在一些P、S超标的问题，只是有的地方明显，有的地方不那么明显。在做下一步加工的时候，中频熔化炉的这一缺陷显得更为明显，同一炉钢水出来的钢锭经过锻打、酸洗后经常会发现有些地方的材质会有细微的区别，这也难怪，因为中频熔化炉不具备除渣的功能，所以出来的东西做一些表面加工时会进一步的暴露问题：沙眼、裂痕、起皮等。
How to improve the melting speed of the intermediate frequency melting furnace ?
The former is generally used for Tao alloy materials, the latter is used for refining steel, and can achieve dozens of tons of electroslag furnaces. Medium frequency melting furnaces are generally not so large, rarely exceeding ten tons of intermediate frequency melting furnaces . The frequency of the intermediate frequency melting furnace and the electroslag remelting furnace are different, and the frequency of the intermediate frequency melting furnace is higher than the frequency of the power frequency furnace. The intermediate frequency melting furnace uses this heat to heat and melt the metal to achieve the purpose of melting. The main features are as follows: 1. The molten metal is subjected to electromagnetic force. The molten metal is strongly stirred by the electromagnetic force. This is a main feature of the intermediate frequency melting furnace . The liquid metal movement (stirring) starts from the center of the molten pool and reaches the ends of the coil. Movement, because the metal is constrained by the bottom of the furnace and the wall of the furnace, the final movement is always upward, forming a hump at the top of the furnace. 2. The remelting of theintermediate frequency melting furnace is the beginning stage of intermittent smelting and melting. The whole metal to be melted is composed of small pieces of furnace materials. Due to the feeding method and other problems, the feeding density is only about 1/3 of the capacity of the furnace. At this time, the charging material is a Very poor electrical load, when inputting power to the furnace, the individual pieces of material will arc and be welded together. Once welded together, the whole furnace charge will form a large piece, and the furnace efficiency will be improved. The intermediate frequency melting furnace is cheaper than the refining furnace 800-1000. Mainly the equipment of theintermediate frequency melting furnace is too cheap, usually tens of thousands of pieces, some of which are cheaper to transfer, if the price can be enjoyed on the electricity price, the cost of steel making is lower. However, with the embodiment of economies of scale and government control, it is believed that in the near future, the intermediate frequency melting furnace will withdraw from the historical stage. Therefore, the medium-frequency melting furnace steelmaking requires high raw materials and the composition is difficult to control. Firstly, it is reflected in the control of carbon content, because the AOD-like vacuum condition cannot be formed, even if the raw materials can be controlled to the extreme, the carbon content of the intermediate frequency melting furnace The amount is also difficult to control below 0.03%. In addition, there is no process for desulfurization and dephosphorization, and it is generally impossible to remove harmful elements such as sulfur and phosphorus in the raw materials. Therefore, when 304L and 316L are selected, the intermediate frequency melting furnace is excluded. Especially when exporting products, the flat steel and round steel from the intermediate frequency melting furnace will have some problems of P and S exceeding the standard, but some places are obvious. Some places are not so obvious. In the next step of processing, this defect of the intermediate frequency melting furnace is more obvious. After forging and pickling, the ingots from the same furnace steel often find that there are subtle differences in the materials in some places. It is no wonder that Because the intermediate frequency melting furnace does not have the function of removing the slag, the exposed things will be further exposed when doing some surface processing: trachoma, cracks, peeling, and the like.
When the power is constant, increase the surface area of the raw material, make the material thinner, and then, if the furnace is reheated, it can be faster.