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为综合利用我国难溶性钾矿提取氯化钾,采用石盐和石灰石作为焙烧难溶性钾矿的混合助剂,研究了钠钾摩尔比、石灰石加入量、焙烧温度与时间、钾钠挥发等因素对钾提取率的影响.钠钾摩尔比为4,石灰石加入量为12.5wt%的配料在900 ℃焙烧90 min的条件下,混合助剂实现了钾提取率84.6%.通过X射线衍射仪(XRD)对焙烧产物水浸后的滤渣进行了矿物组成分析,探讨了NaCl和CaCO3作为混合助剂分解钾长石的机理.石盐和石灰石组成的混合助剂与难溶性钾矿的质量比为0.73,与其它体系相比,助剂用量大大降低. 相似文献
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硅酸盐细菌在解磷、解钾、解硅方面的应用进展 总被引:2,自引:0,他引:2
硅酸盐细菌广泛应用于微生物肥料中,可以分解土壤和矿物中难溶性的磷、钾、硅。介绍了硅酸盐细菌在土壤和矿物中解磷、解钾、解硅方面的研究现状、机制及存在的问题,提出硅酸盐细菌的应用应向复合肥方向发展。 相似文献
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我国钾矿储量主要集中在青海的柴达木盆地和新疆的罗布泊地区,约占总储量的96%以上。并以卤水钾矿为主,占总量的98%以上。卤水钾矿从矿物类型上可分为氯化物型卤水钾矿和硫酸盐型卤水钾矿两大类。目前国内氯化物型含钾卤水制氯化钾先进工艺技术为反浮选一冷结晶和兑卤脱钠控速分解制氯化钾工艺(4#工艺)。 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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The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylation. Those chitosans were degraded by ultrasonic radiation to different molecular weights. Changes of the molecular weight were determined by light scattering, and data of molecular weight changes were used to calculate the degradation rate and rate constant. The results were as follows: The molecular weight of chitosans decreased with an increasing ultrasonication time. The curves of the molecular weight versus the ultrasonication time were broken at 1‐h treatment. The degradation rate and rate constant of sonolysis decreased with an increasing ultrasonication time. This may be because the chances of being attacked by the cavitation energy increased with an increasing molecular weight species and may be because smaller molecular weight species have shorter relaxation times and, thus, can alleviate the sonication stress easier. However, the degradation rate and rate constant of sonolysis increased with an increasing DD of the chitosan used. This may be because the flexibilitier molecules of higher DD chitosans are more susceptible to the shear force of elongation flow generated by the cavitation field or due to the bond energy difference of acetamido and β‐1,4‐glucoside linkage or hydrogen bonds. Breakage of the β‐1,4‐glucoside linkage will result in lower molecular weight and an increasing reaction rate and rate constant. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3526–3531, 2003 相似文献