Method for reducing crushing difficulty of high-carbon ferrochrome

The invention relates to the technical field of high-carbon ferro-chrome smelting, in particular to a method for reducing high-carbon ferro-chrome crushing difficulty, high-carbon ferro-chrome in-furnace raw material granularity is adjusted, rich slag with high purity is matched, and reduction effic...

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Bibliographische Detailangaben
Hauptverfasser: GAO XIHU, HAO RONGLU, FENG XUANJIE, WANG YANWEN, WANG GUANGSHENG, LIU BAOHUA, WANG XIANWU, ZENG RENFU
Format: Patent
Sprache:chi ; eng
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Zusammenfassung:The invention relates to the technical field of high-carbon ferro-chrome smelting, in particular to a method for reducing high-carbon ferro-chrome crushing difficulty, high-carbon ferro-chrome in-furnace raw material granularity is adjusted, rich slag with high purity is matched, and reduction efficiency is improved while the contact area in the ore reduction process is increased; in addition, the secondary voltage can be increased by 5v in the smelting period, and parameter changes in the front stage, the middle stage and the later stage of the smelting process are reasonably operated and controlled, so that the silicon content in the alloy components reaches 3.5% +/-0.5%, and the carbon content reaches 6.8%-7.5%; finally, a multi-layer pouring mode is matched in the pouring process, the pouring thickness each time is not larger than 60 mm, water is pumped 2-3 times after pouring is finished, primary crushing is conducted till the temperature is lower than 110-240 DEG C, and the primary coarse crushing granu