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尾矿资源开发利用已引起人们的重视,从尾矿中回收部分铁矿物给企业创造了很大的经济效益,能否综合利用铁尾矿还有大量工作要做. 相似文献
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提高我国尾矿资源综合利用效率的思考 总被引:2,自引:0,他引:2
尾矿作为二次资源,具有很好的综合利用前景.有效、合理地利用尾矿,实现尾矿的资源化综合利用尤为必要.我国尾矿综合利用存在着综合利用率低、综合利用技术落后、政策支持不足等问题.通过对我国尾矿综合利用现状及存在问题进行分析,提出了转变观念、技术创新、成果转化、政策引导等四个方面的建议措施来提高我国尾矿资源综合利用效率. 相似文献
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高效离心机FALCON在云南某多金属矿尾矿中锡回收的应用 总被引:2,自引:1,他引:1
为充分回收利用云南某多金属矿尾矿中的锡,对尾矿进行了矿石性质和选矿试验研究,研究发现尾矿粒度很细,属于难选矿。经过对比试验,利用高效离心机FALCON对细粒级锡石的选别有一定的效果,能得到作业回收率49.82%,对原矿23.00%的离心机精矿,离心机精矿经过分级摇床精选能得到锡品位31.40%,作业回收率51.46%,对原矿回收率11.84%的锡精矿。高效离心机FALCON工业生产运行稳定,得到含锡40.42%,作业回收率42.36%,对原矿回收率9.11%的锡精矿,增加了企业的经济效益,实现了资源的有效利用。 相似文献
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歪头山铁矿马耳岭车间自投产以来一直没有实施尾矿再选,随着资源的日益紧缺及原料价格的上涨,对其选矿流程的尾矿实施再选成为必然。 相似文献
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我国矿产资源非常丰富,每年对矿产的开采量十分庞大,随之而来的问题就是开采的矿资源得不到充分地利用,产生大量的尾矿得不到有效处理,从而对自然环境造成了很大的危害。本文主要通过阐述尾矿资源回收和综合利用的概述,分析了尾矿综合回收利在资源回收上带来的经济效益及社会效益,同时也表明了尾矿的妥善处理对改善生态环境的关键性。 相似文献
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Yuan-dong Pei Sheng-li Wu Shao-guo Chen Zhi-xing Zhao Gang An Zheng-ming Cheng Yao-sheng Luo 《钢铁研究学报(英文版)》2017,24(7)
It is important to make full use of waste generated in the iron and steel manufacturing process for energy saving,emission reduction,low carbon production and a circular economy.Based on research on different kinds of industrial solid wastes from Shougang Jingtang,wastes have been optimized for use in sintering.At first,basic tests for all kinds of solid wastes that may be used in sintering were carried out,including chemical composition,calorific value of a fuel,holding time at high temperatures,the sintering pot test,etc.The results show that the appropriate solid waste ratios for current sintering conditions are:steel slag <5 %,scale 2.0 %,environmental ash 2.0%,and cyclone ash 1.0%;blast furnace dry ash,sintering electric field ash,and steelmaking ash should not be circulated in sintering.As for the fuel structure,both coking ash and nut coke should be below 15 %.By optimizing the addition of solid wastes,the damage of harmful elements to sintering and blast furnaces has been significantly reduced,which satisfies the demands for blast furnace materials and earns benefits.The utilization of solid wastes has made a contribution to the circular economy and sustainable development. 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
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Utilization of more plant wastes for production of quality sinters improves the productivity of the furnace at the same time
plant wastes materials are recycled. The ferrogenous waste like dust catcher dust and gas cleaning plant sludge can be utilized
in sintering for production of hot metal. Recycling of these iron bearing materials and flux materials have great economic
importance in sintering as it is not only utilizing all iron generated byproducts but also the associated fuel rate reduction
benefit for sintering process. 相似文献
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在生产规模扩大的同时,建立了完善的废水、废气、固废三废的预防、治理环保工程体系,取得了经济效益、环境效益、社会效益同步发展的最佳效果。 相似文献
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除了废弃特征明显的废物适合现场鉴别之外,其他绝大多数无机物料都需要利用多种分析仪器对其理化特性和特征指标进行分析,以分析结果为基础进行固体废物属性鉴别。结合已经开展的无机物料固体废物属性鉴别实例,阐述了无机物料固体废物属性鉴别过程中常用的X射线荧光光谱、X射线衍射、激光粒度、扫描电子显微镜、偏光显微镜、X射线能谱、化学滴定等7种分析手段。利用X射线荧光光谱、X射线衍射、X射线能谱+扫描电子显微镜、偏光显微镜等4种常用分析手段对一种进口无机物料进行了分析,结果显示,物料的主要元素组分为钴、氧、硫、镁、锰、硅,主要物相为氧化钴、硫酸钴、Mg3Si2O5(OH)4、Co3(OH)4Si2O5,推断出该物料是氧化钴生产过程中所产生的混杂了未经历萃取分离、沉淀、煅烧等工序的物质,根据GB 34330—2017《固体废物鉴别标准 通则》中相关条款判断该物料属于固体废物。通过建立的无机物料固体废物属性鉴别的通用方法和流程,可为进口无机物料的固体废物属性鉴别和监管提供参考,对有效遏制各种无机固体废物涌入我国,保护我国生态环境安全和人体健康具有重要意义。 相似文献
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建筑垃圾用作井下充填材料,不仅可以消除其大量堆放造成的环境危害,而且可以解决矿山采空区充填材料不足的问题,有效维护采场安全。采用土工试验的方法,测试了建筑垃圾的基本物理性质。针对建筑垃圾一次破碎中间粒径缺失问题,提出了新的破碎工艺,即将一次破碎后粗骨料的1/3二次破碎至15 mm以下后回混,能够得到级配良好的骨料。根据膏体材料强度及流动性能要求,选用建筑垃圾制备骨料,普通水泥作为胶凝材料,粉煤灰作为添加料,制备合格的膏体材料,开展单轴抗压试验和坍落度试验。结果表明:使用建筑垃圾制备骨料时,控制粉煤灰掺量为15%、水泥掺量为10%、含水率在27%~28%之间,膏体材料的坍落度为21.5~24.0 cm,得到的充填体3 d单轴抗压强度为1.23 MPa、28 d单轴抗压强度为3.55 MPa,能够满足膏体材料对强度和流动性能的要求。 相似文献
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文章介绍了以钢铁生产中产生的固废冶金渣及收尘系统产生的尘灰为原料,通过回收其中的有用成份锌,实现了对固体废物的资源化和综合利用的方法和工艺,产生了良好的经济效益,减轻了环境污染。 相似文献