執(zhí)行器IC20-15W3T芯科技，芯創(chuàng)新；74328683
為了提高渣中FeO的含量來脫Si，所以在精煉過程中加鐵礦石，在其過程中可能會伴隨有S的，但不需再進(jìn)行造渣去硫，而是在精煉結(jié)束出鎳鐵水的時候會洗渣降硫，使得精煉后的鎳鐵水硫含量降到了0.05%。KR脫硫精煉工藝KR脫硫攪拌法是鐵水脫硫工藝中常用的一種，與噴吹法脫硫相比，具有動力學(xué)條件好、脫硫效率高、脫硫劑的使用量少、可控制性強(qiáng)等優(yōu)點(diǎn)，目前成為鐵水爐外脫硫方法中技術(shù)優(yōu)越，工藝成熟，成本較低的脫硫工藝，現(xiàn)已在各鋼廠中廣泛使用。
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在瓦斯灰粒度-2目占4%、還原劑為瓦斯灰本身帶有含碳物質(zhì)的條件下，其試驗(yàn)結(jié)果根據(jù)定義，還原度=FeO含量/TFe含量×1%，在理想焙燒情況下，F(xiàn)e2O3全部還原成Fe3O4時理論上焙燒礦的還原度為42.8%。從圖8可看出，當(dāng)溫度在7～85℃之間時，隨著磁化焙燒溫度的升高，鐵礦物的還原度也隨著提高。焙燒溫度在7～75℃，瓦斯灰的鐵礦物還原度提高得不多，還原度分別為39.1%和4.2%。
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