【摘要】：為了從不銹鋼粉塵中回收利用Fe,Cr和Ni等,對不銹鋼粉塵熱壓塊制備及其自還原過程進(jìn)行了研究.在熱壓溫度為200℃,熱壓壓力為35 MPa條件下,抗壓強(qiáng)度達(dá)到900 N/個以上.高溫條件下,煤熱解產(chǎn)生的揮發(fā)分可參與不銹鋼粉塵還原反應(yīng),當(dāng)還原溫度為1 400,1 450℃時,揮發(fā)分還原作用率達(dá)到0.4.據(jù)XRD分析和熱力學(xué)計算,自還原過程中含鉻物質(zhì)的物相轉(zhuǎn)變順序為Fe Cr2O4,Cr2O3,Cr7C3,[Cr]Fe-Cr-Ni-C.當(dāng)還原溫度為1 450℃,煙煤中固定碳與粉塵中可去除氧的物質(zhì)量的比(xc/xo)為0.72時,不銹鋼粉塵熱壓塊不能完全還原;當(dāng)xc/xo大于0.8,還原20 min時,不銹鋼粉塵熱壓塊能完全還原.
[Abstract]:In order to recover Fe Cr and Ni from stainless steel dust, the preparation and self reduction process of hot pressing blocks of stainless steel dust were studied. When the hot pressing temperature is 200 鈩，

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