共查询到19条相似文献,搜索用时 203 毫秒
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李泰康 《再生资源与循环经济》2002,(5)
含有锡铜铅锌的鼓风炉水淬渣经矿热电炉还原熔炼产出锡铜铅铁多元合金.用氯气浸出该合金,以硫酸铅的形式分离出铅,合金粉还原铜产出海绵铜,中和水解分离锡和铁,进而实现锡铜铅铁多元合金的有效分离. 相似文献
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上钢五厂100t电炉除尘系统采用第二孔+密闭罩和屋顶罩切除+LF炉的排烟方式,长袋低压脉冲除尘器净化工艺,除尘系统于1997年3月建成,目前运行情况良好。 相似文献
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移动电极电除尘器(MEEP)具有出口粉尘排放浓度低、可有效收集PM2.5等优点,其运动部件的可靠性越发受到国内外制造厂家的重视,清灰钢刷作为其关键部件之一,其国产化后的寿命和失效形式的研究越来越重要。分析了钢刷结构失效形式,并在综述了国外移动电极电除尘器钢碡4的研究经验的基础上,设计了钢刷失效形式和寿命测试试验装置。为提高钢刷寿命和降低移动电极电除尘器出口粉尘排放浓度提供了试验数据,推动了移动电极电除尘器关键的运动部件的研究进程,为移动电极电除尘器钢刷的改进和现有设备间距时间调整提供参考。 相似文献
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在分析铁合金厂矿热电炉运行工况及其烟尘特性的基础上。对矿热电炉除尘工艺的选择原则进行了探讨,并提出了建议。 相似文献
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本文介绍了PLC在电炉除尘控制系统中应用的一个实例,采用PLC后将提高电炉尘系统的整体性,可靠性,维护性,降低运行成本。 相似文献
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大力发展短流程钢铁企业,是钢铁工业节能减排、发展循环经济、实现可持续发展的重要途径。介绍了国内外电炉短流程钢铁企业的发展情况,阐述了短流程钢铁企业"三低两高"发展循环经济的模式,提出提高我国短流程炼钢产量占总产量比重必须采取的战略措施,以及短流程钢铁企业发展循环经济亟需解决的关键问题。 相似文献
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南钢100t电炉原除尘系统为"高阻损、高能耗"系统,为了全面降低管网阻力,提高系统处理风量,满足生产规模的需要,从除尘系统的3个要素着眼(系统工艺、捕集罩、除尘器),探讨了100t电炉除尘系统的改造方案和具体措施. 相似文献
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废杂铜回收利用工艺技术现状及展望 总被引:1,自引:0,他引:1
随着社会经济的发展,铜生产和消费的矛盾日益突出。废杂铜作为一种再生资源,其回收利用不仅能够缓解我国铜矿资源缺乏的现状,而且也符合国家当前节能减排和环保的要求。概述了废杂铜的回收分类和生产工艺技术现状,并对今后的发展趋势进行了展望。 相似文献
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Roque António José da Silva Paula F. de Almeida Rui Pedro Marques 《Journal of Material Cycles and Waste Management》2022,24(6):2385-2400
Journal of Material Cycles and Waste Management - A crushed concrete aggregate, processed from construction and demolition waste and a siderurgical aggregate, processed from electric arc furnace... 相似文献
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Characteristics of steel slag under different cooling conditions 总被引:2,自引:0,他引:2
Tossavainen M Engstrom F Yang Q Menad N Lidstrom Larsson M Bjorkman B 《Waste management (New York, N.Y.)》2007,27(10):1335-1344
Four types of steel slags, a ladle slag, a BOF (basic oxygen furnace) slag and two different EAF (electric arc furnace) slags, were characterized and modified by semi-rapid cooling in crucibles and rapid cooling by water granulation. The aim of this work was to investigate the effect of different cooling conditions on the properties of glassy slags with respect to their leaching and volume stability. Optical microscopy, X-ray diffraction, scanning electron microscope and a standard test leaching (prEN 12457-2/3) have been used for the investigation. The results show that the disintegrated ladle slag was made volume stable by water granulation, which consisted of 98% glass. However EAF slag 1, EAF slag 2 and the BOF slag formed 17%, 1% and 1% glass, respectively. The leaching test showed that the glass-containing matrix did not prevent leaching of minor elements from the modified slags. The solubility of chromium, molybdenum and vanadium varied in the different modifications, probably due to their presence in different minerals and their different distributions. 相似文献
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Study of the presence of fluorine in the recycled fractions during carbothermal treatment of EAF dust 总被引:1,自引:0,他引:1
Menad N Ayala JN Garcia-Carcedo F Ruiz-Ayúcar E Hernández A 《Waste management (New York, N.Y.)》2003,23(6):483-491
Carbothermal treatment tests of electric arc furnace dusts (EAFD) using the Waelz kiln process were carried out in pilot-scale for the production of zinc oxide. The association of halides in the EAFD, and the recycled products, such as zinc oxide fumes and high-grade iron contents fractions were examined by X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM) analysis. XRD reveals the presence of chlorine and fluorine in the dusts in the form of KCl, NaCl and CaF2. An ultra-pure fraction of zinc was obtained after the Double Leaching Waelz Oxide (DLWO) process was performed on the zinc oxide fumes. The halide contents were reduced to approximately 100 ppm Cl and 700 ppm F. The rest of these elements are in the form of CaF2. About 65% F is volatilised as lead and zinc fluorides, 15% is expected in the magnetic fractions and 20% in non-magnetic fractions as CaF2 and MnF2, respectively. 相似文献
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Morihiro Osada Ken Takamiya Kazutaka Manako Masato Noguchi Shin-ichi Sakai 《Journal of Material Cycles and Waste Management》2013,15(1):25-36
The service life of many buildings and houses built using asbestos-containing materials is coming to an end and their demolition will lead to a great deal of asbestos-containing waste (ACW). Conventionally, the disposal of such waste is conducted by isolation under controlled landfill procedures; however problems with this method exist, such as the risk at the time of re-utilization of landfill sites and the depletion of lands to be reclaimed. Melting treatment is a promising technology that could be used to solve these problems; a thermal process involving temperatures exceeding the melting points of asbestos, it transforms them into non-hazardous minerals. This technology may be applicable not only for friable ACW but also for nonfriable ACW. We performed a demonstration test of melting treatment of nonfriable ACW using a gasification and melting furnace of the shaft furnace type, which is a typical method for high temperature melting. Detailed observation using transmission electron microscopy as well as general analyses verified that the same level of asbestos remained in the slag obtained by high temperature melting as that of the background soil. In addition, the asbestos concentration in the exhaust gas and the dust from the facility were at sufficiently low levels, and it was thus verified that the asbestos concentration in the atmosphere in the vicinity of the facility during the melting treatment was comparable to that of Japan’s background level reported by the Ministry of the Environment in 2007. 相似文献
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污泥掺烧技术在煤粉炉上应用的试验研究 总被引:2,自引:0,他引:2
通过污泥掺烧技术在煤粉炉上的应用试验,得出污泥的含水率对锅炉制粉系统的影响.掺烧前后对炉膛温度没有大的影响,随着污泥比例的增加,燃烧效率下降,烟尘浓度和SO2浓度降低. 相似文献
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Evaluation of the use of a sequential extraction procedure for the characterization and treatment of metal containing solid waste 总被引:6,自引:0,他引:6
Metal containing wastes like MSWI fly ashes and blast furnace sludge form a major environmental problem as they are polluted with heavy metals. The ash has to be landfilled or can be used as a construction material, but a pretreatment is in general necessary. Washing of the ashes with water in order to dissolve soluble salts or extracting the heavy metals with chemicals are possibilities. Blast furnace sludge contains large quantities of iron and carbon and could be recycled in the blast furnace, if the zinc content were not that high. Using a hydrometallurgical process the zinc can be removed from the sludge particles. In order to evaluate such treatment methods knowledge of the leaching behaviour of the studied material is very important. One of the factors influencing the leaching behaviour is the composition and mineralogy of the solids. A sequential extraction procedure, whereby the material is sequentially leached with different leaching solutions, can be used as an aid to characterize the material and to determine which chemical conditions are needed to obtain a sufficient extraction efficiency. To verify the accuracy of the sequential extraction procedure, a method is tested on MSWI fly ash and evaluated by comparing the results with those of leaching experiments whereby the final pH of the leaching solutions is varied over a wide range. Based upon this evaluation some suggestions for the use of the sequential extraction procedure are made and an adapted procedure is suggested, and applied to a blast furnace sludge. 相似文献
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高效铝屑再生熔炼炉主要由熔化室、循环泵、加料井、循环管路四部分组成。该炉采用循环泵为铝液流动提供动力,使铝液在特殊结构的加料井中形成非接触式漩涡。该漩涡强度大,对铝屑的沉熔效果好,铝屑氧化烧损小,是一种技术先进、高效的铝屑再生熔炼炉。 相似文献