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利用高炉煤气差压发电,是钢铁企业一项有效的能源回收措施。它不仅能回收高炉鼓风机所耗30%的能量,同时又净化了煤气,改善了高炉煤气的品质。既有明显的经济效益,又有明显的社会效益。 相似文献
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双层热风熔炼炉能处理各种复杂的含金银多金属矿料,可综合回收矿料中的铜、铅、金、银等。既可做到综合利用矿产资源,又能减少环境污染。 相似文献
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根据烧结烟气的特点及烟气脱硫技术的现状,提出我厂新建烧结机应通过产、学、研结合,开发出投资小,又能回收利用的活性炭法脱硫技术。 相似文献
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湿法炼锌工艺中稀散金属的回收 总被引:2,自引:0,他引:2
我国硫化锌矿资源丰富,锌矿石含有稀散金属,特别是铟的含量很高。因此,研究既能经济高效提锌,又能有效地综合回收稀散金属的炼锌工艺是十分重要的。本文评述了国内外湿法炼锌工艺中回收稀散金属的途径及进展。 相似文献
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高炉冶炼富锰渣是处理难选贫锰矿石和铁锰矿石的一种有效方法,既能充分利用资源,又能取得较好的经济效益。本文简要论述了采用高炉冶炼富锰渣综合回收Pb,Zn、Ag等有价金属的基本原理及生产工艺,并提出了进一步提高综合回收的经济效益的途径。 相似文献
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过去,冶金企业煤气安全事故时有发生,特别是在煤气回收过程因气体含量不合格发生可燃气体燃烧、爆炸事故,造成人员的伤亡和财产的重大损失.如何既能把控煤气回收的安全性,又能稳定炼钢转炉吨钢煤气回收率,煤气回收氧含量分析仪运行系统的安全应用迫在眉睫.萍乡萍钢安源钢铁有限公司在提高氧分析仪运行的准确性上做了大量工作,如炼钢转炉适当调低转炉烟罩高度和处理管道泄漏点、调整一次除尘三通阀和水封阀回收放散的转换时间等卓有成效的改进,确保了整个转炉煤气回收系统安全稳定运行,取得了吨钢煤气回收量140 m3,达到全国优秀水平,获得了良好的经济效益. 相似文献
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AO Johnson A Subtil R Petrush K Kobylarz SR Keller TE McGraw 《Canadian Metallurgical Quarterly》1998,273(28):17968-17977
In adipocytes, the insulin-regulated aminopeptidase (IRAP) is trafficked through the same insulin-regulated recycling pathway as the GLUT4 glucose transporter. We find that a chimera, containing the cytoplasmic domain of IRAP fused to transmembrane and extracellular domains of the transferrin receptor, is slowly recycled and rapidly internalized in Chinese hamster ovary cells. Morphological studies indicate that the chimera is slowly trafficked through the general endosomal recycling compartment rather than being sorted to a specialized recycling pathway. A chimera in which a di-leucine sequence within the cytoplasmic domain of IRAP has been mutated to alanines is rapidly internalized and rapidly recycled, indicating that this di-leucine is required for the slow recycling but not for the rapid internalization. Insulin stimulates a 2-3-fold increase in the recycling of the chimera and only a 1.2-fold increase in the recycling of the transferrin receptor. The effect of insulin on the recycling of the chimera is blocked by wortmannin, a phosphatidylinositol 3'-kinase inhibitor. GTPgammaS (guanosine 5'-3-O-(thio)triphosphate) increases the recycling of the chimera by 50% but has no effect on the recycling of the transferrin receptor. In these studies, we have identified in Chinese hamster ovary cells a novel, slow endocytic recycling mechanism that is regulated by insulin. 相似文献
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Lester B. Lave Chris T. Hendrickson Noellette M. Conway-Schempf Francis C. McMichael 《Canadian Metallurgical Quarterly》1999,125(10):944-949
Municipal solid waste (MSW) recycling targets have been set nationally and in many states. Unfortunately, the definitions of recycling, rates of recycling, and the appropriate components of MSW vary. MSW recycling has been found to be costly for most municipalities compared to landfill disposal. MSW recycling policy should be determined by the cost to the community and to society more generally. In particular, recycling is a good policy only if environmental impacts and the resources used to collect, sort, and recycle a material are less than the environmental impacts and resources needed to provide equivalent virgin material plus the resources needed to dispose of the postconsumer material safely. From a review of the existing economic experience with recycling and an analysis of the environmental benefits (including estimation of external social costs), we find that, for most communities, curbside recycling is only justifiable for some postconsumer waste, such as aluminum and other metals. We argue that alternatives to curbside recycling collection should be explored, including product takeback for products with a toxic content (such as batteries) or product redesign to permit more effective product remanufacture. 相似文献
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物质危害性分析、爆炸和火灾危险环境区域划分、生产过程的危险性及重大危险源辨识,是转炉烟气净化回收系统危害性评价的要点。转炉烟气净化回收系统的主要产品转炉煤气具有易燃、易爆、易引起急性中毒等特点,对转炉煤气的有效控制是钢铁企业避免发生重大安全生产事故的可靠途径。现代转炉炼钢烟气净化系统危害评价是十分必要的,且对实际生产有指导意义。 相似文献
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为了实现转炉含磷钢渣高效循环利用,系统分析了转炉含磷钢渣的生产状况、组成成分、磷元素的来源和迁移富集机理、矿相结构以及脱磷技术的研究现状。并以此为基础,通过对转炉含磷钢渣循环利用技术的探讨总结,表明目前的钢渣循环利用技术存在着磷资源利用效率低和钢渣能量损耗大的缺点。因此,依据钢渣磷质量分数高低决定其利用方式并在循环利用环节尽可能降低钢渣能量损失是一种必然的趋势。基于前人的研究基础,进一步对实现低磷渣和高磷渣的高效循环利用进行了展望,从而为钢铁企业提高转炉含磷钢渣循环利用率和降低原料生产成本提供理论依据和技术参考。 相似文献
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钢铁生产过程的各类含铁粉尘具有较高的再资源化利用价值,其回收利用工艺影响生产效率、资源消耗、产品质量等.综合比较认为,碳酸化球团-转炉工艺将含铁粉尘与CO2回收利用有机结合,有望成为钢铁工业含铁粉尘再资源化利用的"绿色"工艺.理论分析表明:含铁粉尘碳酸化球团工艺从热力学角度不仅是可行的,而且理论上可以通过工艺参数与装备设计优化,实现回收利用过程"零"能耗,甚至"负"能耗;从动力学角度,通过提高CO2分压、合理优化反应温度等措施,可加快碳酸化反应速率,提高Ca0转化率和成品球团强度;碳酸化冷固结球团用作转炉造渣剂,可降低转炉炼钢消耗,提高钢质量,是其理想的利用途径. 相似文献
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再生铝原料品位高、易再生,基建投资、生产成本、能源消耗和污染物排放量均远低于原生铝,国家产业政策已将其列入鼓励产业;我国铝矿产资源并不丰富、人均占有量只有世界平均水平的1/10,大力发展再生铝工业是我国发展循环经济和实现铝工业可持续发展的必然选择。但再生铝工业既不是“绿色产业”,也不应是“洋垃圾处理工厂”。 相似文献