排序方式: 共有42条查询结果,搜索用时 31 毫秒
1.
2.
Life cycle inventory analysis of CO2 and SO2 emission of imperial smelting process for Pb-Zn smelter
Based on the principle of life cycle assessment, CO2 and SO2 emission of Imperial Smelting Process in a certain zinc-lead smelter was analyzed by life cycle inventory method. According
to the system expansion and substitution method, the environmental impacts of co-products were allocated among the main products
of zinc, lead and sulfuric acid. The related impacts were assessed by use of Global Warming Potential (GWP) and Acidification
Potential (ACP). The results show that the GWP index from 1998 to 2000 is 11.53, 11.65, 10.93 tCO2-eq/tZn respectively, the ACP index decreases from 14.88 kgSO2-eq/tZn in 1998 to 10.99 kgSO2-eq/tZn in 2000. Power and electricity generation, followed by smelting and zinc distillation, are mainly responsible for
GWP. Sintering individually affects ACP. Reduction in greenhouse gas emissions of the ISP may come from energy conservation
measures rather than from technological developments. And recycling more secondary Pb and Zn materials effectively treated
by ISP, and reducing the amount of primary metal are the main ways to put SO2 emission under control.
Biography of the first author: LI Qi-hou, postdoctor, born in Aug. 1972, majoring in ecodesign and the structure and morphology control of powders. 相似文献
3.
高密度高活性球形Ni(OH)_2的制备研究 总被引:6,自引:5,他引:6
采用“受控中和水解法”进行了金属氢化物-镍电池用的高密度高比容量球形Ni(OH)2的制备研究,讨论了pH值、添加剂、加氨量等操作条件对Ni(OH)2堆积密度及电活性等性能的影响。实验结果表明:用本文论述的方法可以制得高密度高比容量球形Ni(OH)2颗粒,振实密度在2.0g/cm3以上,比表面积在15~20m2/g。添加氨水后可以改变Ni(OH)2的结晶程度,采用复合添加剂比单一添加剂更能有效地提高Ni(OH)2的活性和改善镍电极的性能。使用该Ni(OH)2作为活性物质的电极,其容量可达到260mAh/g。这种Ni(OH)2特别适合于用作金属氢化物-镍电池的正极活性材料。 相似文献
4.
1 INTRODUCTIONImperialSmeltingProcess (ISP) ,isaprocessavailableforproductionofzincandlead .Atpresent,about 13operatingISPsmeltersproduceabout 13%ofglobalzincandlead[1] .ButISPisasignificantcontributortoindustrialgreenhouseandacidityemis sionsduetoitshighenergyconsumption .Althoughcellemissionshavebeenreducedconsiderablyinre centyears ,thegrowingglobalconcernonenviron mentalissuesisimposingpressureontherelatedcom paniestoreducetheiremissions .Becauseofthelargenumberoffeedstreams ,by… 相似文献
5.
6.
Prediction of powder characteristics of uniform NiO precursor prepared by homogeneous precipitation 总被引:1,自引:0,他引:1
Uniform NiO precursor particles were prepared by homogeneous precipitation in the presence of urea. Optimal discrimination plan, one of the chemical pattern recognition techniques, was applied to analyze the experimental data and the quantitative relationships among the process parameters and powder characteristics of the obtained particles were determined. It proves that the model fits well with the experimental results and it is quite effective to guide the process design. Based on the above results, an improved La Mer model and the reasonable formation mechanism of the particles are proposed. 相似文献
7.
8.
9.
固相诱导沉淀法制备单分散NiO微粒 总被引:1,自引:0,他引:1
将草酸以固体粉末形式添加到镍氨配合溶液中,沉淀出均一分散的草酸镍铵复合盐(类)球形颗粒,经热分解后可得到单分散NiO微粒。草酸以粉末形式加入,其固液界面对草酸镍铵沉淀微粒的形貌具有显著的诱导效应。实验研究表明,当配合溶液的氨镍摩尔浓度比等于5︰1(其中镍离子浓度设定为0.5mol·dm-3),反应温度为40℃,加入草酸后混合溶液pH值为8.8,反应时间为10min时,得到平均粒度为1.1μm的沉淀颗粒,450℃下热分解后粒子体积发生收缩,形成平均粒度为0.8μm的NiO微粒。该方法易于得到均一的单分散微粒,并可显著减小沉淀母液的体积量。 相似文献
10.