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杨文栋 《有色金属再生与利用》2010,(3):46-48
循环经济是通过资源高效和循环利用,污染物的低排放甚至零排放,保护环境,实现社会、经济与环境的可持续发展。在湿法炼锌过程中,产出的烟尘、各类废渣和废液中含有多种有价金属。如焙砂浸出后产出的酸浸压滤渣,净化时产出的铜镉渣、钴镍渣,氧化锌烟尘浸出时产出的含有铟、锗、镓的浸出液和铅渣,氧化锌多膛炉焙烧时产出的含铟布袋尘和铜镉渣提取镉后产出含铟的贫镉液等。从这些废渣、废液中回收有价金属是循环经济的具体体现,是企业经济活动所面临的新课题。 相似文献
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湿法炼锌工艺中的综合回收 总被引:1,自引:0,他引:1
循环经济是通过资源高效和循环利用,污染物的低排放甚至零排放,保护环境,实现社会、经济与环境的可持续发展。在湿法炼锌过程中,产出的烟尘、各类废渣和废液中含有多种有价金属。如焙砂浸出后产出的酸浸压滤渣,净化时产出的铜镉渣、钴镍渣,氧化锌烟尘浸出时产出的含有铟、锗、镓的浸出液和铅渣,氧化锌多膛炉焙烧时产出的含铟布袋尘和铜镉渣提取镉后产出含铟的贫镉液等。从这些废渣、废液中回收有价金属是循环经济的具体体现,是企业经济活动所面临的新课题。 相似文献
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温州冶炼总厂每年从3万t冶炼废渣中提炼出总价值4 000~6 000万元的铟、银、铅等金属,变废为宝,填补了省内空白. 2002年,温州冶炼总厂建成锌渣处理挥发窑工程,每年对3万t自身产生或回收来的冶炼废渣进行再利用,从中提炼氧化锌等有用物质.2004年以后,该厂进一步狠抓资源利用,每年从3万t废渣中提炼出5~6 t稀散金属铟(市场价600~900万元/t)以及银、铅等其他金属.此外,该厂还回收利用钢铁厂烟尘、电镀抛光粉等废渣,并于2006年开始,与温州市环保部门合作,对全市电镀业含锌废渣进行无害化处理和再利用. 相似文献
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金属锌冶炼、热浸镀锌和锌铸件加工等生产过程中部会产生大量含锌废渣,其中包括锌烟、锌灰、锌渣、锌浮渣等.目前的湿法冶金工艺主要用于处理各种锌烟、锌灰等氧化锌含量较高的锌渣.采用的电解液体系主要有ZnSO4-H2SO4和Zn(II)-NH3-NH4C体系。而对热镀锌渣、热铸锌渣则直接熔铸成锌渣阳极再通过电解精炼制备高纯锌.ZnCl2-NH4Cl是较为理想的电解液体系。近些年来,国内外有很多有关利用不同体系和工艺从工业废渣中回收并提纯锌的研究成果。 相似文献
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MACA体系中循环浸出低品位氧化锌矿制备电解锌 总被引:2,自引:0,他引:2
以云南兰坪低品位氧化锌矿及其循环浸出渣的浮选精矿为原料,常温常压下在MACA(金属氨络合物)体系中进行循环浸出。浸出液先净化除砷和锑、再两段锌粉逆流置换深度净化,两次净化后液电积制取电解锌。考察工艺中循环浸出率、净化率、物质平衡以及电解锌质量和电耗等技术经济指标。结果表明:先用MACA法处理原矿粉,再浮选硫化锌的选冶结合流程是合适的兰坪低品位氧化锌矿的处理方案,原矿锌的平均浸出率为70.48%,其氨可溶锌浸出率达到89.14%,浮选精矿锌的浸出率为79.75%,杂质元素的净化率达到95%,电解锌纯度达到99.98%,电流效率可达97.02%。 相似文献
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金属锌冶炼、热浸镀锌和锌铸件加工等生产过程中都会产生大量含锌废渣,其中包括锌烟、锌灰、锌渣、锌浮渣等.目前的湿法冶金工艺主要用于处理各种锌烟、锌灰等氧化锌含量较高的锌渣,采用的电解液体系主要有ZnSO4-H2SO4和Zn(Ⅱ)-NH3-NH4Cl体系.而对热镀锌渣、热铸锌渣则直接熔铸成锌渣阳极再通过电解精炼制备高纯锌,ZnCl2-NH4Cl是较为理想的电解液体系.近些年来,国内外有很多有关利用不同体系和工艺从工业废渣中回收并提纯锌的研究成果. 相似文献
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简述了高钛型高炉渣当前阶段的各种利用技术,讨论了其存在的问题。详细介绍了稀盐酸浸取高钛型高炉渣制备富钛料及其综合利用技术,认为该方法是解决高钛型高炉渣综合利用的有效途径之一。 相似文献
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《稀有金属材料与工程》2005,22(3):44-48
全面回顾了从攀钢高炉渣中提钛的各项技术研究,从技术、经济、环保、市场等方面进行了对比分析,指出碳化钛或碳氮化钛是最适合从攀钢高炉渣中分离钛的物质,并对提钛必须兼顾二次废渣的综合利用给予了高度重视。 相似文献
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J. F. Pusateri C. O. Bounds L. W. Lherbier 《JOM Journal of the Minerals, Metals and Materials Society》1988,40(8):31-35
A major objective of the zinc industry for the 1990s will be to maintain high zinc recovery while eliminating the disposal of copious quantities of hazardous iron residues. The flame reactor process has demonstrated the potential of meeting this objective by either treating the residues or smelting zinc directly. The process has been proven commercially viable for treating flue dusts generated during electric arc furnace steelmaking. Zinc, lead and cadmium are recovered from the dust as a crude oxide for recycle while a nonhazardous slag is produced for sale. Similar products are efficiently produced from electrolytic zinc plant neutral leach and iron precipitation residues. In addition, the reactor shows promise of fulfilling its original objective of being a low-energy primary zinc smelter by fuming and condensing zinc from roasted concentrates. 相似文献
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Technological progress on detoxification and comprehensive utilization of chromium containing slag 总被引:6,自引:0,他引:6
Chromium salt is an important industrial material, but vast waste slag containing chrome(Ⅵ) is brought out in the process of its production. The slag is seriously harmful to environments and human health. The technologies on detoxification and comprehensive utilization of chromium-containing slag were summarized abroad and at home. And various methods were also described for the detoxification mechanism, technology process, and practical application effects in detail. A new concept for detoxification of chromium-containing slag, furthermore, was put forward by using microorganism. 相似文献
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将柿竹园铅锌矿破碎球磨,进行煅烧、除硫,经浓盐酸酸洗、过滤,实现了有价元素与其他元素的分离,通过控制不同的pH值,分别得到铁和铅锌的氢氧化物,再往滤液中加入NH4HCO3,钙以CaCO3的形式沉淀出来,将所得的碳酸钙经硝酸溶解后,加入适量的硅酸钠,并用聚乙二醇作为分散剂,制得硅酸钙粉体.并对制各的溶液和滤渣进行了表征,研究了焙烧物料的数量和金属的离子价态对产物纯度和回收率的影响.本试验通过控制适宜的工艺条件,使铁和钙的浸出率分别达到83.2%和67.7%,工艺简便,成本较低,实现了矿产资源的综合利用. 相似文献
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Present-day knowledge of the structure and physical properties of metallurgical slags is summarized to address structure-property and inter-property relationships. Physical properties of slags including viscosity, electrical conductivity, and surface tension is reviewed focusing on the effect of slag structure, which is comprehensively evaluated using FT-IT, Raman, and MAS-NMR spectroscopy. The effect of the slag composition on slag structure and property is reviewed in detail: Compositional effect encompasses traditional concepts of basicity, network-forming behaviors of anions, and secondary impact of network-modifying cations. Secondary objective of this review is elucidating the mutual relationship between physical properties of slags. For instance, the relationship between slag viscosity and electrical conductivity is suggested by Walden’s rule and discussed based on the experimental results. Slag foaming index is also introduced as a comprehensive understanding method of physical properties of slags. The dimensional analysis was made to address the effect of viscosity, density, and surface tension on the foaming index of slags. 相似文献
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结合大理矿业开发有限公司年产45 kt/a钛渣工程,阐述了电炉煤气回用发电给企业带来的节能减排效果。论证了电炉煤气回用发电既符合国家资源综合利用的政策,又能给企业创造良好的经济效益、社会效益和环境效益。 相似文献