本文選題：梯度配鋁　切入點(diǎn)：FeV合金　出處：《稀有金屬》2017年11期 　論文類型：期刊論文

【摘要】：分析了Al,Si,C熱還原制備FeV50合金的熱力學(xué)可行性及鋁熱還原過(guò)程渣金釩鋁平衡,采用分期梯度配鋁的方式,考察了原料配比、反應(yīng)溫度、加料制度和多期配鋁系數(shù)對(duì)渣中TV含量及合金成分的影響。通過(guò)不同還原劑熱還原的熱力學(xué)分析表明:1500 K時(shí),常壓條件下碳熱還原過(guò)程優(yōu)先生成VC,只有當(dāng)體系真空度高于76.8 Pa才能得到穩(wěn)定釩基合金產(chǎn)品;硅熱反應(yīng)僅適用于高價(jià)釩氧化物的還原,配加CaO有利于反應(yīng)的進(jìn)行以及釩氧化物的還原效率;鋁熱還原V_2O_5和V_2O_3的單位反應(yīng)熱分別為368.4和221.0 k J·mol~(-1),基本能夠滿足密閉系統(tǒng)維持自發(fā)反應(yīng)的熱量需求。鋁熱還原渣金熱力學(xué)平衡分析結(jié)果表明FeV50渣中TV含量隨合金Al含量的升高而降低,當(dāng)合金Al含量為2.0%時(shí),渣中理論TV含量為0.27%;若要使渣中理論TV含量降低到0.15%,合金Al含量需達(dá)18.8%以上�；诖�,采用"梯度配鋁"工藝試驗(yàn),在三期加料制度4-3-1,配鋁系數(shù)1.30-1.00-0.30,原料配比3∶1,體系溫度1850℃的條件下,渣中平均TV含量由均勻配鋁的1.85%降低到0.69%,合金Al含量從1.6%降低到0.4%。
[Abstract]:Analysis of the Al, Si, the reduction process of vanadium aluminum slag metal equilibrium C thermal reduction thermodynamics feasibility and aluminum hot preparation of FeV50 alloy, the gradient aluminum staging method, effects of raw material ratio, reaction temperature, feeding system and multi period aluminum coefficient on the content of TV and alloy slag components in thermodynamic effects. The reducing agent through different heat reduction analysis shows that: 1500 K, first generation of VC carbon thermal reduction process under atmospheric conditions, only when the vacuum system is higher than 76.8 Pa to get the stable vanadium alloy products; silicon thermal reduction reaction is only applicable to the vanadium oxide, adding CaO to the reaction and reduction efficiency vanadium oxide; unit reaction heat V_2O_5 and V_2O_3 aluminum thermal reduction were 368.4 and 221 K J mol~ (-1), can basically meet the closed system to maintain the spontaneous reaction heat demand. Metal slag thermodynamic equilibrium analysis results of aluminum thermal reduction Increase the content of TV FeV50 in the slag with Al alloy decreased, when the content of Al alloy is 2%, the theory of the TV content in slag is 0.27%; if the theory of TV content in the slag is reduced to 0.15%, the content of Al alloy should be above 18.8%. Based on this, the technology of gradient aluminum test in 4-3-1 three stage charging system, aluminum coefficient 1.30-1.00-0.30, material ratio 3: 1, the system temperature is 1850 DEG C under the condition of reducing the average content of TV in slag by the uniform distribution of aluminum 1.85% to 0.69%, the content of alloy Al is reduced from 1.6% to 0.4%.

【作者單位】： 攀鋼集團(tuán)研究院有限公司釩鈦資源綜合利用國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展(973)計(jì)劃項(xiàng)目(2012CB724202)資助
【分類號(hào)】：TG142.1

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本文編號(hào)：1557013