双碱法净化胶磷矿选矿水的研究与工业实践

某胶磷矿选矿工艺为在碱性介质中正浮选富集磷,在酸性介质中反浮选脱镁,由于选矿药剂种类多,精矿水中与尾矿水中游离离子差异很大,所以本研究集中收集选矿废水并采用双碱沉淀法对控制水中SO42-和PO43-的质量浓度进行了试验,结果表明处理后的废水满足浮选的要求,实现了选矿废水的循环利用,达到了零排放。     

混凝耦合多孔陶瓷膜净化河水简

Membrane filtration technology combined with coagulation is widely used to purify river water. In this study, micro filtration （MF） and ultrafiltration （UF） ceramic membranes were combined with coagulation to treat local river water located at Xinghua, Jiangsu province, China. The operation parameters, fouling mechanism and pilot-scale tests were investigated. The results show that the pore size of membrane has small effect on the pseudo-steady flux for dead-end filtration, and the increase of flux in MF process is more than that in UF process for cross-flow filtration with the same increase of cross-flow velocity. The membrane pore size has little influence on the water quality. The analysis on membrane fouling mechanism shows that the cake filtrationhas significant in fluence on the pseudo-steady flux and water quality for the membrane with pore size of 50, 200 and 500 nm. For the membrane with pore size of 200 nm and backwashing employed in our pilot study, a constant flux of 150 L-m^-2-h^-1 was reached during stable operation, with the removal efficiency of turbidity, total organic carbon （TOC） and UV254 higher than 99%, 45% and 48%, respectively. The study demonstrates that coagulation-porous ceramic membrane hybrid process is a reliable method for river water purification.     

吸附法固定化脂肪酶研究进展简

吸附法固定化酶优点众多,特别是操作简单,载体种类丰富使其在固定化技术上占有一席之地.目前吸附法固定化脂肪酶已经得到广泛应用.介绍了吸附法固定化脂肪酶的研究现状,并对该技术的发展瓶颈及趋势进行了总结.     

冬季轮胎概况简

介绍冬季轮胎的市场、技术、新产品和试验场测试情况。冬季轮胎市场主要为欧洲、北美、新西兰和日本等,欧洲部分国家强制性规定使用冬季轮胎,2012年日本冬季轮胎销售量同比增长4.3%,达到2304.3万条。冬季轮胎技术以普利司通、米其林、倍耐力和诺基亚技术为代表。2013年世界大型轮胎公司推出多款性能优异的冬季轮胎。试验场测试对冬季轮胎市场和研制具有指导意义。     

栀子黄色素稳定性的研究简

对栀子黄色素稳定性进行了较为全面的研究。结果表明：栀子黄色素总体具有较好的稳定性。栀子黄色素热稳定性、耐酸碱性较好,但室外自然光、紫外光对栀予黄色素有一定的影响;金属离子（Fe3＋、Cu2＋、Al3＋）、H2O2、Na2SO3、柠檬酸对栀子黄色素有较大影响。     

磷矿湿法生产中伴生稀土回收研究进展简

磷矿中伴生稀土的回收,对于资源的综合利用及经济效益的提升有着重要意义.文章从磷矿湿法加工工艺的角度,简单介绍了近几年湿法生产中伴生稀土的研究现状.     

油气管道清管器分类研究简

普通清管器是一种借助于本身动力或在油、气流推动下,在管腔内运动,用于清洁管壁的工具。普通清管器通常分为以下四种：泡沫式清管器;机械式清管器;一体式清管器;球形式清管器。智能清管器主要是指通过涡流、超声、漏磁等无损检测原理对管道的几何形状、金属损失、裂纹进行检测的一种器具。