陕西山阳某锑矿试验研究

陕西山阳县某锑矿,原矿含锑2.27%,硫2.85%,砷0.27%。通过试验选择糊精、硅酸钠作为组合抑制剂,正丁醇作为起泡剂,有效抑制了石英、黄铁矿、毒砂矿物进入锑精矿中。采用一段磨矿、一次粗选、一次扫选、两次精选的工艺流程,最终获得产率3.45%、锑品位59.42%、回收率90.31%的锑精矿。     

剪切速率对泡沫流体性能的影响

利用不同的剪切速率对一定体积的起泡液进行搅拌,形成不同泡沫质量的泡沫体系,通过测量起泡体积、半衰期、泡沫综合指数、有效黏度等参数,考察剪切速率对泡沫体系性能的影响。结果表明:相对于起泡性能,泡沫稳定性对泡沫综合指数的影响更大;要达到较高的泡沫综合指数,所需的起泡液黏度应在50mPa·s左右,生成泡沫所需的的最佳剪切速率为900s-1;随着泡沫质量增大,泡沫液的有效黏度增大;为了使泡沫具有一定的有效黏度,起泡所用的剪切速率要在864s-1以上,生成泡沫的泡沫质量要保持在74%~95%。     

循环流化床锅炉吸收塔浆液起泡现象分析及处理

针对循环流化床锅炉吸收塔浆液起泡溢流问题,从燃煤飞灰、石灰石成分、吸收塔溢出物、脱硫系统工艺水及浆液等方面进行分析,认为脱硫系统发生起泡溢流主要是由于更换含磷和COD偏高的工艺水导致,并提出更换工艺水、加强对水源监测、添加脱硫消泡剂、定期冲洗溢流管、排空管、液位计等处理措施.     

矿井污泥一步固化法制轻质建材的技术研究

一步固化及加气发泡法是矿井污泥无害化、资源化处理最有效的方法。选取水泥、粉煤灰(煤渣)、河砂、石灰(石膏)、发气物料作为固化加气发泡处理剂,运用正交试验研究了矿井污泥实验条件;并通过抗压强度来评价污泥固化块(轻质建材块)的力学性质;采用XRD和SEM分析污泥固化块(轻质建材块)的组成和微观结构。结果表明,水泥、粉煤灰(煤渣)、河砂、石灰(石膏)的掺比量一定时对污泥固化块(轻质建材块)的抗压强度具有有利影响。该配比的污泥固化块(轻质建材块)对矿井污泥有很好的固化效果。     

Aquafaba,wastewater from chickpea canning,functions as an egg replacer in sponge cake

Aquafaba, the viscous liquid resulting from cooking chickpeas in water is typically discarded. However, this solution is now widely used by the vegan community as an egg replacement that adds texture to food products, such as mayonnaise, pudding, ice cream and baked goods. Sponge cake was prepared with either egg white or aquafaba derived from ten different brands of canned chickpea and the texture and colour were compared. Aquafaba obtained from each chickpea can produced foam which differed in both properties and stability. In addition, aquafaba from some brands provided comparable foam volume and stability to that achieved with egg white. The colour and texture of sponge cake made with either egg white or aquafaba were similar and acceptable, but cakes prepared with aquafaba were less springy, and less cohesive than cake that included egg white. Based on our results, it appears that aquafaba has potential to replace egg white in eggless cake recipes.     

应用组合起泡剂优化黑、白钨混合浮选

针对湖南某钨选厂使用杂醇类起泡剂BK205所产生的泡沫小、性脆、泡沫层薄等不利于二次浮选的特点,采用BK205与新型醚类起泡剂CU组合使用以便实现矿石中钨矿物的高效回收。结果表明,在采用BK205与新型醚类起泡剂CU组合质量比为3∶1、先BK205后CU的加药方式下,小型闭路试验得到精矿WO3品位为30.13%,回收率为78.98%。工业试验表明,组合起泡剂不仅改善浮选泡沫,减少药剂用量,降低药剂成本,而且能获得比原起泡剂更好的工业指标,使钨矿物得到更高效的回收。     

物理发泡微胶囊及其在纺织印染中的应用

阐述了物理发泡微胶囊的成囊过程、制备方法;讨论了壁材和芯材的选择要求,介绍了物理发泡微胶囊在纺织品印染中的应用。物理发光微胶囊有助于纺织印染新产品的开发。     

稠油油藏出砂冷采技术实践

套保油田为普通稠油油藏,其开发的难点是常规冷采产能低、递减快,蒸汽吞吐开采注入压力过高破坏隔层导致底水上窜、注入压力过低不能保证注入蒸汽质量导致开采效果差。因此开展出砂冷采试验,经研究及现场试验形成了较完善的配套工艺技术,出砂冷采在套保油田白92块工业化应用,单井日产油达到10～30m^3／d,为常规冷采产量的10～20倍。     

Influence of pH-Induced Unfolding and Refolding of Egg Albumen on Its Foaming Properties

ABSTRACT: The foaming properties of egg albumen, which had been subjected to low and high pH unfolding followed by refolding, were investigated. The foaming capacity of egg albumen, the stability of the foam, or both, could be improved by an unfolding and refolding regime by choosing proper unfolding and refolding pH values. The foaming capacities of egg albumen were greatly improved when the refolding was at pH 6.5, 7.5, or 8.5, whereas the foaming capacities could be either slightly increased or decreased when the refolding was at pH 4.5 or 5.5 compared with the controls. The foam stability was in almost all cases improved by the unfolding and refolding treatments except for a few cases of unfolding at pH 1.5 or 10.5. The foam stability and liquid drainage were improved most when the unfolding was at pH 12.5. Analysis of total and surface sulfhydryl groups, surface hydrophobicity, and protein analysis by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) provided strong evidence that the partial unfolding of egg albumen proteins as well as the interactions among egg albumen proteins through disulfide and/or hydrophobic groups dictated the improvements in foaming properties. The increase in surface hydrophobicity showed better correlation with the improvement of foaming properties than the change of surface sulfhydryl content did.