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本文分析介绍了国外一种有色冶金炉渣显热回收利用的成熟工艺。综述了国内有色冶金炉渣热回收利用的现状,初步阐述了国内有色冶金炉渣热回收利用的途径。 相似文献
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The volatilization of zinc and lead from the stainless steel making dust pellets in the direct recycling procedure was conducted by using a thermo-gravimetric analyzer and a Tamman furnace in the nitrogen atmosphere respectively. The results show that the temperature has a significant effect on the volatilization rates of zinc and lead,and the carbon content in the pellets has no effect on the volatilization process. The volatilization of zinc is controlled by the chemical reaction between zinc oxide and carbon monoxide, while the volatilization of lead is controlled by the evaporation from liquid phase to the atmosphere. The volatilization of zinc and lead mainly happen at about 1000℃ according to non-isothermal experiment. 相似文献
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The heating and melting mechanisms of the pellets immersed in liquid slag were investigated, and the effect of the pellet heating and the melting conditions were studied. The results show that the dust component in the pellet is melted from the surface and no metallic elements are melted before the dust component, the time for the pellet completely melted is reduced as the iron powder content increases since the metallic iron has high thermal conductivity. These are four stages of heating and melting of pellet in liquid slag, they are the growth and melt of solid slag shell, penetration of liquid slag, dissolving of dust component and melting of reduced metals. The lifetime of the solid slag shell is in the range of 7-16 s and increasing the pre-heating temperature of the pellet and the slag temperature can shorten the slag shell lifetime. The time for the dust component in the pellet to be melted completely is in the range of 20-45 s and increasing the pre-heating temperature, especially in the range of 600-800 ℃, can obviously reduce the melting time. A higher slag temperature can also improve the pellet melting and the melting time is reduced by 10-15 s when the slag temperature is increased from 1 450 to 1 550 ℃. The pellet with higher content of iron powder is beneficial to the melting by improving the heat conductivity. 相似文献
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电弧炉粉尘等温还原的动力学研究 总被引:7,自引:0,他引:7
为使还原条件与实际电弧炉生产相接近,在等温条件下对电弧炉粉尘球团的还原过程动力学进行了研究。电弧炉粉尘与还原剂碳和粘接剂石灰均匀混合后制粒,经干燥后将球闭置于恒定温度的加热炉中,利用电子称定时对球团重量进行检测。金属还原率的计算中,考虑了球团的失重、铅和锌在高温下挥发。经研究,电弧炉粉尘的还原分为二个阶段,还原初期由化学反应控制而还原后期由扩散控制,并建立了每一阶段的还原动力学方程,确定了有关的动力学参数表观活化能和频率因子。 相似文献
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电弧炉粉尘球团直接还原的热传导模型 总被引:1,自引:0,他引:1
对电弧炉炼钢粉尘加上还原剂碳混合制粒成的球团还原过程的热传导行为进行了研究,根据实验推导了球团导热模型的结构参数,并试图建立热传导模型。 相似文献
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Electric arc furnace dust non-isothermal reduction kinetics 总被引:3,自引:0,他引:3
1 INTRODUCTIONTheairbornefineparticulateElectricArcFur nace (EAF)dustisgeneratedinthesteelmanufactur ingprocesswhenscrapiselectricallymelted .Itisconsideredasahazardouswastebecauseofleachingcharacteristicofheavymetalssuchaslead ,zincandchromium ,whichare p… 相似文献
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Thermodynamic calculation on the smelting slag of direct recycling of electric arc furnace stainless steelmaking dust 总被引:5,自引:1,他引:5
1 INTRODUCTIONElectricarcfurnace (EAF)dusthasbeenclassifiedasahazardouswasteduetoitshighcontentofsomeheavymetalsleachabilitiessuchaszinc ,lead ,cadmiumandchromium ,soithasbeenbannedfromlandfillsinmanycoun tries .Anestimated 1 % 2 %massfractionofthescrapcharged… 相似文献