These defects result from VAR process, which relates to the size of titanium sponge and alloying elements before melting.
这些缺陷都是真空电弧重熔过程的产物，与海绵钛和添加元素的粒度有关。
Using sponge iron reduced by iron ore concentrate powder as raw material, the smelting process of pure iron is investigated through non vacuum induction furnace and vacuum induction furnace.
以由铁精矿粉直接还原出来的海绵铁为原料，以非真空感应炉和真空感应炉为冶炼设备，对纯铁的冶炼工艺进行了研究与试验。
The basic principle and process to produce the sponge iron in our corporation are introduced.
对海绵铁生产的基本原理及公司的海绵铁生产工艺进行了介绍。
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