The shortage of contact shoe in ore smelting electric arc furnace is analysed from its performance.

从矿热炉对铜瓦的性能要求方面分析了铸造铜瓦的缺陷。

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General method and other new technologies of ore smelting electric arc furnace starting-up are introduced.

介绍了矿热炉开炉的一般方法和两种开炉新工艺。

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An ore smelting electric are furnace with low-frequency electric power could save electric energy and electrode, and raising their production furthermore.

低频电源应用于矿热炉中，能提高产量，节约电能与电极。

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The government has also decided to impose a 20% levy on raw ore exports and requires companies to start smelting all ore locally by 2014.

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They want to provide a series of incentives to mine owners and firms which make gold as a by-product of smelting copper ore.

BBC: Golden opportunity for old Indian mines

He read about something called direct-reduced iron, a technique for smelting without melting--removing the oxygen from iron ore while it's still solid, that is.

FORBES: Carnegie would be jealous