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河北辛集化工厂开发的高纯碳酸钡生产技术,于1993年4月23日在河北省辛集市通过省级技术鉴定。该厂开发的高纯碳酸钡生产技术是以自产的钡盐为原料,经过精制等工序最终制得碳酸钡主含量在99.5%以上,杂质离子含量 相似文献
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颗粒碳酸钡是生产显像管玻壳、磁性材料和光学玻璃的重要化工原料,同时也是国际市场的畅销商品。为给我国引进的显像管玻壳厂提供配套原料,我厂建成一套干法生产颗粒碳酸钡的生产装置,规模为年产颗粒碳酸钡5000吨。 相似文献
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我国碳酸钡的市场现状和发展方向 总被引:16,自引:0,他引:16
碳酸钡是重要的无机化工产品之一,可分为粉状、粒状和高纯碳酸钡。目前我国大多数厂家采用碳化法,一些中、小型企业采用毒重石法,而只有少数厂家采用成本较高的复分解法生产碳酸钡。2001年全国碳酸钡总产量为50万t,30多家生产厂,在建装置能力11万t/a。预测今后几年碳酸钡的消费将保持增长趋势,出口量将增加。建议发挥原料和生产方法优势,选用新型设备提高装备能力,向专业化、功能化、微细化方向发展碳酸钡产品。 相似文献
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河北辛集化工厂研制成的颗粒碳酸钡、流动性碳酸钡于一九八六年十一月二十六日在辛集通过了省级鉴定。颗粒碳酸钡是生产显像管玻壳、光学玻璃重要化工原料。经鉴定认为:(1)颗粒碳酸钡生产采用干法造粒工艺,它与湿法造粒比较,具有工艺简单,节省能源,成本低,产品质量稳定可靠等优点。经河北省化 相似文献
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介绍了高纯碳酸钡的常见粒度表述术语,评价方法与生产控制手段,为高纯碳酸钡生产中的粒径控制提供了多条途径。 相似文献
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Ana Andrés Mª Carmen Díaz Alberto Coz Mª José Abellán Javier R. Viguri 《Journal of the European Ceramic Society》2009,29(10):1869-1877
Due to the high competitiveness of the ceramic product market, quality and technical requirement are increasing. The efflorescence problem is a phenomenon that affects the aesthetic quality of brick facades and which is not easily dealt with. The aims of this work are to study the key physical and chemical parameters for this phenomenon in all activities of the brick manufacturing process and to evaluate the influence of the additives employed on the appearance of the efflorescence phenomenon. Porosity and specific surface, mineralogical analysis, total chemical content and soluble salts were determined on green, dried and fired brick, both when no additives were added to the manufacturing process and also when ammonium lignosulphonate and barium carbonate were used as additives. The main mineralogical phases and water soluble salts in the efflorescence phenomenon have been obtained. In some cases, relationships between soluble salts in the end product and soluble salts in the efflorescence have been established. From the obtained results, the use of a mixture of ammonium lignosulphonate and barium carbonate together with the control of the firing process variable is recommended in order to prevent this phenomenon. 相似文献
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M. D. Judd M. I. Pope 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》1971,21(6):149-153
The decomposition, under vacuum, of some co-precipitated alkaline-earth carbonates has been further investigated by applying the techniques of differential thermal analysis (DTA),? electrothermal analysis (ETA) and dilatometry. The results supplement previous work by confirming that decomposition of double and triple carbonates proceeds in two and three distinct stages, respectively. Loss of carbon dioxide from the strontium carbonate component of a double (SrBa) carbonate leads to a breakdown in the crystal structure, forming a mixture of strontium oxide and barium carbonate. Decomposition of the barium carbonate commences before decomposition of the strontium carbonate is complete. With a triple (CaSrBa) co-precipitated carbonate, thermal decomposition of the calcium carbonate component results in a mixture of calcium oxide with the corresponding double carbonate: DTA shows conclusively that the mixture does not contain the single strontium and barium carbonates. 相似文献
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The micellar structure of a barium nonylphenolate/barium carbonate complex was characterized by 1H and 13C nuclear magnetic resonance (NMR) spectroscopy. Several NMR techniques, including measurement of spin-lattice relaxation
time, chemical shift variation, and line width of the 1H NMR signal and solid-state 13C NMR data, were used in this study. NMR results indicate that the prepared barium nonylphenolate and barium carbonate complex
formed a micelle structure with the oxygen atom of the nonylphenolate ring oriented toward the solid-state center core of
barium carbonate while the highly branched aliphatic chain pointed outward to the hydrocarbon solvent. 相似文献
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A brief review of the causes of scumming and glaze peeling is given. The usual use of barium carbonate for the prevention of these defects is also outlined. The reactivity test for barium carbonate and a suggested chemical analysis for soluble sulphates are described. Reactivity values of various barium carbonates are reported, followed by a discussion of the practical value of the reactivity test. A specification for barium carbonate is recommended. 相似文献
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讨论了碳酸钡生产的各种工艺,提出了提高碳酸钡质量的方法。重点讨论了产品中杂质的来源,降低含硫的方法,调整碳化工艺参数,提高浓卤质量从而改善了产品诸多物理性能。 相似文献
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污垢中的主要成分是碳酸钙,还有碳酸钡、硫酸钡、镁盐、硫酸锶等。国内外学者对碳酸钙结垢规律的研究很多,对碳酸钡的研究相对较少一些。通过冷指实验,控制离子浓度、反应温度、pH值、反应时间和搅拌速度以及溶液的过饱和度,以研究这些参数对碳酸钡结垢的影响。结果表明,碳酸钡垢的生长速率随着温度的增加而增加,随着流速的增加而减小,pH为9时最小,浓度对其生长速率的影响不甚明显。利用冷指实验研究碳酸钡结垢规律是一种较新的方法,其研究成果为油田除垢防垢提供一定的理论依据。 相似文献
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详细叙述了中国沉淀法白炭黑生产过程中废气、废液产生的来源及危害,指出直接向环境排放二氧化碳废气、硫酸钠废液不仅浪费资源、污染环境,而且严重限制其行业可持续发展。阐述了两种污染物资源化利用的各种方法,其中二氧化碳可以转化成沉淀碳酸钡、轻质碳酸钙等,硫酸钠可以转化成硫酸钡、硫酸钾、硫化钠等工业产品。通过分析、对比资源化利用的各种方法,建议白炭黑生产企业要积极与钡盐行业进行合作联营生产,这样不仅减少“三废”排放,保护环境,而且是污染物资源化利用最佳途径,并且具有一定的可行性。 相似文献
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采用掺杂纳米级钛酸钡和碳酸锰的方法,观察了掺杂不同量纳米级钛酸钡和碳酸锰后的钛酸钡坯片烧结所得陶瓷表面的显微组织形貌的变化,研究了单一掺杂纳米级钛酸钡、单一掺杂碳酸锰、复合掺杂碳酸锰+纳米级钛酸钡对陶瓷制品晶粒尺寸与介电性能的影响。结果表明:掺杂纳米级钛酸钡对钛酸钡陶瓷制品的介电性能有显著的提升,但是随着掺杂量的进一步增加,其介电性能的变化不大;掺杂碳酸锰对钛酸钡陶瓷晶粒的细化效果优于掺杂纳米级钛酸钡的效果;复合掺杂1%(质量分数,下同)碳酸锰+1%纳米级钛酸钡所得陶瓷的致密性高于单一掺杂1%碳酸锰的效果。 相似文献