芯科技，芯創(chuàng)新；火花電極棒，BR80LL185an，74337137
冶煉工藝高碳鉻鐵的冶煉方法有高爐法、電爐法、等離子爐法等。使用高爐只能制得含鉻在3％左右得特種生鐵。目前，含鉻高的高碳鉻鐵大都采用熔劑法在礦熱爐內(nèi)冶煉。電爐法冶煉高碳鉻鐵的基本原理是用碳還原鉻礦中鉻和鐵的氧化物。碳還原氧化鉻生成Cr2C2的開(kāi)始溫度為1373K，生成Cr7C3的反應(yīng)開(kāi)始溫度143K，而還原生成鉻的反應(yīng)開(kāi)始溫度為1523K，因而在碳還原鉻礦時(shí)得到的是鉻的碳化物，而不是金屬鉻。鉻鐵中含碳量的高低取決于反應(yīng)溫度。
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2014年上半年重點(diǎn)鋼鐵企業(yè)燒結(jié)工序能耗為56kgce/t,球團(tuán)工序能耗為29kgce/t。用一噸球團(tuán)礦代替一噸燒結(jié)礦，煉鐵系統(tǒng)工序能耗可降低26kgce/t,有較好的節(jié)能效果。4）科學(xué)評(píng)價(jià)高爐使用球團(tuán)礦效果瑞典高爐煉鐵入爐鐵品位67%，100%球團(tuán)礦，噸礦比1300kg，渣鐵比低于160kg，燃料比450kg；我國(guó)噸鐵用礦1680kg/t,與瑞典相比，就相差380kg，相當(dāng)于噸鐵用礦相差350元左右。
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