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石膏砌块是一种性能优良的内墙材料,其缺点是耐水性差。应用磷石膏为基料,掺加矿渣微粉、水泥等复合材料,在实验室进行工艺配方试验,使石膏制品达到防水产品的软化系数,并将其应用于实践。按照该工艺配方生产的磷石膏砌块强度高、耐水性能优良。 相似文献
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磷石膏水洗净化试验及工艺 总被引:1,自引:0,他引:1
1磷石膏杂质含量对其应用性能的影响磷石膏与天然石膏相比含有较多杂质,这些杂质的存在对其应用性能造成了有害影响。磷石膏中磷分为可溶性磷和非可溶性磷;对石膏制品造成影响的主要是可溶性磷和共晶体磷。氟以可溶氟(NaF)与CaF2、Na2SIF6等难溶氟形态存在;对石膏制品造成影响的主要是可溶氟。磷石膏中钾、钠主要以碳酸盐、硫酸盐、磷酸盐、氟化物等可溶盐形式存在;磷石膏制品受潮时,钾、钠离子沿硬化体孔隙迁移至表面,水分蒸发后在表面析晶,使制品表面产生起霜和粉化现象。磷、氟影响石膏制品的凝结时间和强度,钾、钠过高会出现纸面石膏板生产中不粘纸现象。本试验采取水洗处理方法,去除磷石膏中杂质,从而使磷石膏能广泛用于纸面石膏板、石膏砌块等建材产品的生产。 相似文献
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树立磷石膏是产品的理念,为磷石膏资源化利用奠定基础 总被引:1,自引:0,他引:1
磷石膏综合利用是磷肥行业节能减排工作的重点和难点.树立磷石膏是产品的理念;通过对磷石膏杂质特性的分析,了解对其应用性能的影响,确定磷石膏预处理工艺路线的合理途径,为磷石膏资源化利用奠定基础. 相似文献
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磷石膏生产粉刷石膏的加工工艺研究 总被引:4,自引:1,他引:4
本文在实验的基础上对磷石膏生产粉刷石膏的加工工艺进行了研究,提出了磷石膏加工工艺设计原则,优化了其配比和工艺条件。使用单掺无机矿物保水剂制备的粉刷石膏性能优于甲基纤维素保水剂,为粉刷石膏的研制提供了理论基础。 相似文献
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阐述我国磷石膏的产排量与特点,以及磷石膏在石膏条板、纸面石膏板、水泥缓凝剂、石膏砌块、石膏砖、装饰材料、储能材料等方面的应用;介绍了石膏模盒技术及工业副产石膏在石膏模盒生产中的应用情况;对提高磷石膏综合利用率提出了应用建议。 相似文献
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Cationisation allows cotton to be dyed with anionic dyestuffs (including anionic pigment dispersions) without the need for salt, and with decreased usage of dye, water, and energy. Appropriate cationisation levels play a part in dyeing properties such as fabric levelness, in fastness properties such as lightfastness, and in the overall cost of the cationisation treatment. The objective of this work is to assess whether it is possible simultaneously to predict a dye recipe and cationisation treatment level for cotton to yield a colourless or nearly colourless dyebath at the completion of the dyeing to match the shade of conventional fibre reactive dyeing of cotton. It has been shown that it is possible to model a cold pad batch cationisation process, relate the colour yield data and cationisation level for individual dyes, and finally predict a dyeing recipe and the required corresponding cationisation treatment to match the shade of conventional fibre reactive dyeing of cotton. The predicted dye recipe and cationisation amount yield colourless or nearly colourless dyebaths at the conclusion of the dyeing process. 相似文献
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This paper deals with an analysis of the simultaneous influence of the factors of the silicone coating manufacturing process, such as the contents of the organic and silicone resins used in the paint formulations, on selected physical parameters determining the quality of the coatings: hydrophobicity, resistance to wet scrubbing and the ability to diffuse water vapour through the coatings. This analysis was performed using statistical models based on multiple regression analysis. The proposed statistical models proved to be useful for the optimization of the recipe configurations for silicone coatings. Combining the analysis results enabled the selection of the optimal ranges of values for the analysed factors, from a physical as well as an economic point of view. 相似文献
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以间苯二甲酸为饱和酸,工业双环戊二烯(DCPD)为改性剂,采用水解加成法合成了耐热原子灰用气干性不饱和聚酯树脂。研究了原料及用量对不饱和聚酯树脂和原子灰性能的影响,确定了不饱和聚酯树脂配方。当n(DCPD)∶n(间苯二甲酸)∶n(己二酸)∶n(剩余顺酐)=4∶4∶2∶9时,树脂性能稳定。以此树脂为基材,制得的原子灰耐热温度≥180℃,原子灰综合性能如刮涂性、气干性、打磨性和柔韧性良好。 相似文献
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某型柴油机铸铁缸体、强力螺栓、高温螺栓和拉杆等零件表面须采用高温磷化处理,以获得耐蚀性、耐磨性、耐热性、结合力及硬度均较高的磷化膜,从而提高柴油机的使用性能、期限和品质。但高温磷化存在高能耗造成的较高生产成本问题。本文对高温磷化工艺进行了优化,以高效常温脱脂剂取代传统高温化学除油工艺,取消了表调工序和5%铬酸溶液填充工序,采用热电偶自动控制装置、溢流水清洗技术和逆流漂洗技术,使单位面积磷化成本降低了30%~40%。 相似文献
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K. Udipi 《应用聚合物科学杂志》1979,23(11):3311-3321
Epoxidation of styrene–butadiene block polymers considerably improves their resistance to hydrocarbon oils. Use of peroxyformic acid generated in situ appears to be simple and practical. Although no problems exist when the reactions are carried out in toluene, polymer molecular weight and reactant stoichiometry are important in determining the properties of polymers epoxidized in cyclohexane. In fact, epoxidations in cyclohexane of linear and tapered block polymers of molecular weights in excess of 60,000 with peroxyformic acid invariably lead to gelation. Replacing half or more of formic acid with acetic acid, however, alleviates the problem without adversely affecting the tensile or oil resistance of the resulting polymers. This recipe has also been successfully applied to the epoxidation of divinylbenzene-coupled styrene–butadiene radial block polymers. 相似文献
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研究了丁基橡胶氯丁橡胶共混型室温硫化橡胶衬里的配方设计、耐介质情况及其与金属、水泥、天然橡胶的粘合。经过对比筛选出一种比较实用的室温自硫化化工防腐材料。 相似文献
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介绍了偏氟乙烯树脂保护膜的性能和应用,叙述了偏氟乙烯树脂保护膜在不同用途下的基本配方和成膜方法。认为导致我国VDF树脂保护膜开发迟缓的主要原因是VDF树脂开发落后。且产品质量不高,因此要加快保护膜用VDF树脂和VDF树脂保护膜的开发,用于对耐候性、耐热性、耐污性、耐药性、耐溶剂性和耐久性等有较高要求的各种基材。 相似文献
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一种无溶剂自流平环氧地坪涂料的研制 总被引:1,自引:0,他引:1
讨论了自流平环氧地坪涂料的组成和研制。与溶剂型地坪涂料相比较,该涂料具有绿色环保及自流平性。通过对各种原材料的选择、涂层性能的测试,确定了涂料配方。结果表明该地坪涂料具有耐磨、耐压、抗冲击、耐化学腐蚀等优异性能。 相似文献