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高炉瓦斯泥中有价金属锌和铋的回收利用 总被引:2,自引:0,他引:2
以高炉炼铁瓦斯泥为原料,采用湿法浸取回收其中的有价金属锌、铋以制备氧化锌和氯氧化铋。考察了一些主要因素对锌、铋浸取过程的影响,确定了浸取的最佳工艺条件。锌浸取过程最佳工艺条件:浸取温度50℃,氨水质量浓度0.1406g/mL,碳酸氢铵质量浓度0.0998g/mL,液固比3mL/g,浸取时间120min。铋浸取过程最佳工艺条件:浸取温度50℃,硫酸质量浓度0.1292g/mL,氯化钠质量浓度0.0361g/mL,液固比8.2mL/g,浸取时间60min。在此条件下,锌、铋的收率分别为70.0%和72.0%,产品氧化锌、氯氧化铋的质量分数分别达98%和92%以上。开发出一种从钢铁冶金企业瓦斯泥中回收利用有价金属锌和铋的二次资源综合利用的方法。 相似文献
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应用硫酸-盐酸混酸浸出回收硫铁矿烧渣中的铁,探讨了主要因素对铁浸取率的影响,确定了最佳浸取条件。结果表明,各因素对铁浸取率影响的显著性为:硫酸浓度>盐酸用量>浸取时间>硫酸过量系数;提高反应体系温度,增加盐酸用量均能提高铁的浸取率,而硫酸浓度、反应时间以及硫酸过量系数对铁浸取率存在最佳值。在反应体系沸腾温度为118~125℃,浸取时间为3 h,硫酸浓度为50%~60%,盐酸用量为0.25ml·(g烧渣)-1,硫酸过量系数为1.2的条件下,硫酸烧渣中铁的浸取率达到93.1%,明显高于单一酸的浸取率,提高了铁的资源综合利用率。 相似文献
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4.制氧化铁黑 硫铁矿烧渣用75%H_2SO_4浸取,液固比0.72左右,80℃下浸取30分钟,铁浸出率可达58.7%,然后再加盐酸至液固比为1.8左右,80℃下继续浸取60分钟,这时铁的溶出率可达99.9%。滤去残渣,溶液用铁皮、铁粉或硫铁矿粉作还原剂,于80℃下还原140分钟,使 相似文献
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硫铁矿烧渣酸解工艺研究 总被引:1,自引:1,他引:0
研究了硫铁矿烧渣酸解工艺及影响酸解的因素。通过正交试验,找到适宜的工艺条件:硫酸用量与渣质量比1—1.1mL/g、水用量与渣质量比0.75mL/g、熟化温度250~300℃、熟化时间1—1.5h,酸解率可达97%以上。制得的硫酸铁盐溶液可用作生产氧化铁系颜料的原料。 相似文献
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<正> 一、前言在硫铁矿焙烧制硫酸的过程中,产生大量硫铁矿烧渣,其中约含有58%的铁及一些有色金属(见表1),目前我国对这一废渣没有很好利用。长期堆放,不仅占用大量堆放场地,同时引起环境污染。 (注:硫铁矿烧渣取自云南红河州磷肥厂,分为尘渣和炉渣。) 由表1可见,若直接用硫酸浸取硫铁矿烧渣,因亚铁含量很低而导致铁回收率不高,因此生产成本升高。本法是先将原料还原处理,还原过程中把握还原剂的加入量使三价铁能全部转化成两价铁为限,故此还原剂加入量很少。还原渣用硫酸厂10~30%废酸浸取,浸取液过滤后结晶、干燥可得到FeSO_4·7H_2O含量为95%以上晶体,其优点是,还原焙烧后浸取率高,浸取过程中产生H_2S可使浸取液中有色金属杂质生成硫化物沉淀,热浸取过后立即结晶,FeSO_4·7H_2O粗得产品含量可达95%以上, 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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D. G. Gordeev L. F. Gudarenko M. V. Zhernokletov V. G. Kudel’kin M. A. Mochalov 《Combustion, Explosion, and Shock Waves》2008,44(2):177-189
A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation
of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from
the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO2) of density 0.08 g/cm3.
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Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008. 相似文献
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Jorge Marcelo Romero Soledad Bustillo Hugo Enrique Ramirez Maisuls Nelly Lidia Jorge Manuel Eduardo Gómez Vara Eduardo Alberto Castro Alicia H. Jubert 《International journal of molecular sciences》2007,8(7):688-694
A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out. 相似文献
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A perturbation viscometer is a differential capillary viscometer that measures the logarithmic viscosity gradient of the viscosity-composition curve for gas mixtures. Measurements are made at different gas mixture compositions. Integration of the logarithmic viscosity gradients measured over the full composition range gives the mixture viscosity relative to the viscosity of one of the pure components of the gas mixture. This method is attractive because, for measurements of equal precision, integration of the gradients is potentially an order of magnitude more precise than measurement of the viscosities directly. It can also work at high and low temperatures and perhaps high pressures.The perturbation viscometer has been used to make measurements on ideal gas mixtures at ambient and elevated temperatures. The situation is more complicated when the gas mixtures are non-ideal. Extra effects due to density differences, molar volume change on mixing and differential thermal expansion may be measured in addition to the desired viscosity change producing systematic errors in the results. Thus, a more sophisticated apparatus is required. The standard perturbation viscometer has been modified to separate out the extra effects to permit measurement of the true change in viscosity. In addition, the theoretical operation of the modified apparatus has been revised to account for the design changes to permit calculation of the viscosity-composition profiles from the results.The apparatus has been tested using helium-HFC-125 mixtures and two new viscosity-composition profiles are presented for these mixtures at 23 and . Internal consistency tests have been used to confirm that the data produced are of high quality with an estimated uncertainty in the viscosity ratio data at of 0.9% and at of 1.5%. 相似文献
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醋酸纤维素取代基分布与性质的关系 总被引:9,自引:0,他引:9
分析了以吡啶为溶剂的醋酸纤维素的13C-NMR核磁共振谱,得出了三种不同位置羟基的取代度。结合X—射线和DSC分析,初步说明具有相同取代度但未经水解和经过水解的醋酸纤维素(CA) 性质上的差异是由于三个羟基上的取代度分布不同及消晶程度差异所致。 相似文献