共查询到20条相似文献,搜索用时 93 毫秒
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介绍有色冶金中砷的主要走向及含量分布情况,综述了现阶段国内对含砷物料进行综合处理的四类主要方法——火法焙烧脱砷、湿法浸出脱砷、火法与湿法联合脱砷以及生物氧化预处理脱砷的研究现状,对比分析了四类主要方法的优缺点。湿法脱砷和生物氧化预处理脱砷相对于其他方法具有工艺简单、操作条件温和、节能环保等优点,在实际生产中得到了一定的应用。最后,指出了有色冶金中含砷物料脱砷研究的发展方向。 相似文献
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介绍了砷资源的供需情况及有色冶炼含砷物料的走向及含量分布情况。综述了含砷危废无害化处置技术及工业应用情况,详细介绍了国内外含砷危废玻璃固化技术研究现状,指出玻璃固化技术是含砷危废处理的最佳技术,并从政策管理、标准制定、技术研发及污染治理等角度指明了砷玻璃固化技术的发展方向。 相似文献
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从含砷金硫铁矿中综合回收砷硫 总被引:1,自引:0,他引:1
本文介绍了含砷金硫铁矿资源概况,砷在焙烧过程中的行为与分布,着重阐述了含砷金硫铁矿的各种处理工艺以及从冶炼烟气中综合回收砷、硫采用的有效设备。 相似文献
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The problem of the recycling of plastic wastes is discussed. The polypropylene needs of the modern Russian market are analyzed. The necessity of recycling of plastic wastes is revealed, and its advantages over reclamation are substantiated. The problems of a real enterprise regarding the recycling of polypropylene—polyethylene raw materials for increasing the properties of the end product and optimizing its production are considered, and methods for their solution are proposed. 相似文献
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This paper presents an overview of alternatives that currently are employed for the disposal of wastes containing enhanced concentrations of naturally occurring radioactive materials (NORM). The application of pathway assessment methodology to the derivation of acceptable cleanup criteria for residual NORM is described. A specific example is provided drawing on experience with a site containing above-background levels of natural uranium-series and thorium-series nuclides. The options for safe, permanent disposal of U and Th bearing NORM waste are discussed and the application of pathway analysis to performance assessment of a typical engineered disposal cell is illustrated. Typical methods for disposal of other NORM waste forms also are described. This includes radium-contaminated wastes from petroleum sludges, uranium milling, and geothermal power plant operation as well as thorium wastes from production of thorium-magnesium alloys. 相似文献
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铅冶炼中的三废治理及环境保护 总被引:1,自引:0,他引:1
林河成 《有色金属材料与工程》2005,26(4):182-185
综述了铅冶炼厂的生产简况,主要三废的来源、类别、治理方法及其效果,生产中铅毒的防护及环境保护.针对三废治理存在的问题,提出了建议措施. 相似文献
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P Palatini M Penzo C Canali F Dorigatti AC Pessina 《Canadian Metallurgical Quarterly》1997,103(3):208-216
Great amounts of agroindustrial wastes rich in polysaccharides, such as pectic substances, are produced worldwide. Some of these wastes are used for the production of pectin. Currently, pectin is extracted at industrial scale by physicochemical means, but lately new biotechnological alternatives have been developed. In this review, the principal characteristics of pectic substances and pectic enzymes are described. The traditional physicochemical method for the pectin extraction is described and the new biotechnological (microbial and enzymatic) methods for pectin extraction are discussed and commented as well. 相似文献
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稀土元素在工业上大量应用的同时, 给人类身体健康和生态环境带来了危害, 近年来引起了广泛关注.研究发现吸附法相比其他传统水处理方法具有效果较好、操作简单、成本较低等优点, 它是消除稀土离子危害的最具潜力的方法之一; 而农业废弃物吸附剂因是农业副产物具有廉价的特性, 且部分农业废弃物吸附稀土离子时吸附量大、反应速率快, 可作为主要研究对象.文中对农业废弃物吸附材料吸附稀土离子的机理、吸附影响因素、吸附应用与吸附模型研究进展进行总结评述, 并对农业废弃物吸附稀土离子的发展方向进行展望. 相似文献
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AA Sosunov PP Krugliakov VN SHvalev G Guski IuV Postnov 《Canadian Metallurgical Quarterly》1997,59(2):32-37
Debridement of nonviable tissue is crucial to optimal wound healing, which can be impaired unless all necrotic tissue, exudate, and metabolic wastes have been removed from the wound. Debridement methods are classified as sharp, mechanical, chemical, and autolytic. This article describes methods of debridement and their outcomes. 相似文献
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Summary After filing operations, wastes are obtained at ball-bearing plants in the form of partially oxidized steel powder, which can be used for manufacturing parts by powder metallurgy methods. The modes of reduction of the steel powder and its basic properties are discussed. 相似文献
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In accordance with the national energy strategy, the development of coal-fired power stations in Russia, especially in Siberia and the Far East, calls for utilization of their ash and slag wastes. The total quantity of ash and slag in Russian tailings exceeds 1.5 billion t. These wastes cover an area of more than 220 km2. The utilization of these wastes is no more than 10%. The most promising approaches are utilization of the wastes in construction materials or road building, or a hybrid approach in which valuable metals are extracted during the production of construction materials. Some fly ash can be used in agriculture. The physicochemical properties of ash and slag waste and correspondingly their applicability and the choice of technology will be determined by the mineral component of the coal and the methods by which the coal is burned. In order to use fly ash in construction, dry processing methods for ash and slag waste must be introduced. On the one hand, that involves greater capital expenditures on equipment and structures for storage, classification, crushing, and grinding of the ash and slag waste, as well as means of modifying their properties. On the other, increased transportation and organizational barriers must be expected. Examples of proposed processing technologies based on metal extraction and the production of construction materials are presented. To obtain iron-bearing concentrates, single-stage magnetic separation is mainly employed. However, the resulting quality of the concentrate is unsatisfactory. A better approach to the extraction of metals from ash and slag waste is flotation. At the same time, the available data indicate that the application of flotation may be limited by economic and organizational factors and associated environmental hazards. The conclusion is that the use of such technologies at thermal power stations that are already in operation is possible, with state support. 相似文献