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炼钢中加入3种不同含量的稀土,分析和研究稀土的微合金化作用。稀土的微合金化对钢的金相组织和力学性能有显著的影响,合适的稀土加入量可提高钢的综合力学性能。 相似文献
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《中国有色金属学报》2015,(3)
采用石硫合剂法对金精矿进行浸出,考察硫黄、水与石灰质量比和合成时间对硫的转化率、母液p H值及金浸出效果的影响,通过XRD分析了渣的主要成分,揭示硫的转化途径。结果表明:在硫黄、石灰和H2O质量比为2:1:(50~75)和时间为45 min的条件下,可得到硫转化率为97.57%,p H值为10.5的石硫合剂;石硫合剂稀释浓度为15%时,金的浸出率达到73.42%;硫黄与石灰的质量比是影响硫转化率和p H值的主要因素,随质量比的增加,硫的转化率和p H值逐步降低;水与石灰的质量比和合成时间对p H值影响较大,而对硫的转化率几乎没有影响;硫在石硫合剂合成过程中主要进入溶液,只有少量的硫以单质的形式残留在合成渣中,渣中残留的硫随硫黄与石灰质量比的增加而增多。 相似文献
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钢屑、铁屑投炉熔炼是一项十分经济的技术措施。我厂二十多年来已用“双肩” 117300吨,代废钢十多万吨,节省成本费达800万元。此项措施可省废钢、生铁、电力;有利于造渣、加快熔化速度、保护炉衬、炉盖;且可降低铸件成本。炼钢用的“双屑”必须除去锈蚀和夹带的泥砂。如处理不当,会增加熔炼过程困难,增加消耗量,并影响钢水质量。要求对“双屑”必须及时回收、发运、加工、配料。配加量可 相似文献
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加焦丁对转炉炼钢工艺进行能效补偿技术有效解决了采用加入大量废钢增产等方法时炼钢热量不足的问题,有利于提高转炉热利用效率,达到提高钢产量、降低铁水单耗、降低钢铁料消耗的目标。本文针对某厂120 t转炉能效补偿工艺进行了研究,讨论了某厂能效补偿冶炼工艺在出铁处和转炉冶炼中加入焦丁技术的特点,实现了某厂铁水单耗从810.3 kg/t钢降到805.3 kg/t钢,同时终点钢水过氧化率从18.8%降到17.8%,石灰降低2 kg/t钢,实现钢铁厂稳定生产并取得了显著的经济效益。 相似文献
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难浸金矿加石灰焙烧-氰化浸金工艺方法 总被引:3,自引:0,他引:3
对丹寨含砷硫难浸金矿加石灰焙烧-氰化浸金研究表明,在最佳焙烧条件(600~650℃,a=1.1~1、.2,2h,空气流量200ml/min),可固定99%以上的硫和砷,金氰化浸金率从直接氰化浸出的0%提高到94%。加石灰焙烧是1种新的无污染预处理工艺。 相似文献
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K. F. Behrens J. Koenitzer T. Kootz J. Macnamara 《JOM Journal of the Minerals, Metals and Materials Society》1965,17(7):776-784
Observations covering periods of good and bad conduct of heats pointed at the lime as being the cause of the metallurgical differences. A good parameter for metallurgical properties of burnt lime is its dissolving rate in water. Analysis furnishes information about the burning degree of the lime. Soft burnt lime leads to a more rapid dephosphorization and better desul-furization, as well as an easier conduct of heat with reduced slopping. Hard burnt lime has a poor solubility in slag, and pieces of lime remain undissolved. Slopping increases; the final composition of iron and slag and the final temperature are more widely scattered. Hard burnt lime is denser, the crystallite grain is larger. Annular shaft kilns with waste gas recirculation are being started up by the supplier for the production of soft burnt lime. Sizing the burnt lime by utilizing differences in density is also intended. 相似文献
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随着钢铁行业的发展,对冶金石灰的产量和质量要求越来越高。通过对石灰生产设备能耗和产品活性度方面的比较分析,使用回转窑生产冶金石灰,满足生产等各方面需求,保证了冶金石灰的品质,也达到环保的目的。 相似文献
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Glass with Potash–Lime–Silica (PLS) composition was typically produced for the cathedral windows during the Middle Age in Central and Northern Europe and is known to be very sensitive to the attack of the atmospheric pollutants. PLS glass, containing different amounts of K2O (sample V1 = 15 wt%, V2 = 20 wt%, V3 = 25 wt%), was produced and aged in concentrated boiling H2SO4 and in high temperature-high pressure water, to simulate separately the two alteration processes of leaching (ion exchange) and dissolution, respectively. The aged samples were studied by micro-Raman spectroscopy, by XRPD and by SEM–EDS technique to identify the neo-formed crystalline phases, to get deeper insight into degradation and stability of these systems.The behavior of the glasses as revealed by Raman spectroscopy depends on the K2O content. Gypsum (CaSO4·2H2O), bassanite (CaSO4·1/2H2O) and anhydrite (CaSO4) are found on the alteration layer of the V2 and V3 leached samples. The water aged V1 and V2 glasses show the Raman features of the phyllosilicates gyrolite (Ca16Si24O60(OH)8·14H2O) and reyerite (KCa14Si24O60(OH)5·5H2O) together with hydroxyapatite (Ca5(PO4)3OH). In the alteration layer of the V3 glass, the Raman spectra suggest a mixture of the Ca–K silicate charoite (K5Ca8(Si6O15)2Si2O9(OH)·3(H2O)) and hydroxyapatite. 相似文献