保湿霜中的甘油含量测定

建立了保湿霜中甘油的分析方法。结果表明，这种方法是一快速简便准确的方法，回收率99．1％-100．9％，变异系数0．7％。     

栲胶脱硫系统改造

我公司常压脱硫系统采用栲胶脱硫，合成氨系统和甲醇系统共用l台贫液槽，脱硫溶液采用喷射再生技术。常压脱硫系统自投运以来运行一直较稳定，脱硫效率高，硫回收率、化工原材料消耗均保持在国内同类型企业较好水平。但是近两年来随着企业生产规模的扩大，氨系统生产能力由60kt／a增至120kt／a，甲醇系统生产能力由30kt／a增至60kt／a，且又增添了1套30kt／a甲胺DMF装置，脱硫系统已远远不能满足生产的需要，经常出现硫泡沫发虚、冒槽等现象，硫回收困难，化工原材料消耗较大，设备腐蚀严重，漏点较多，严重威胁着后系统的正常稳定运行，给公司造成了较大的经济损失。针对这一状况，对脱硫系统进行了改造。     

提高镁回收率的途径及效益分析：白云石碳酸化法生产轻质碳酸镁新工艺研究

本文提出了白云石碳酸化法生产轻质碳酸镁，二次碳酸化法新工艺的理论依据、实验结果及技术经济分析。     

Two-step flotation recovery of iron concentrate from Donganshan carbonaceous iron ore

The flotation of pure and natural carbonaceous iron ore samples in the oleate flotation system was investigated. Starch can depress hematite effectively in a wide pH range, but cannot depress siderite efficiently in neutral conditions. The flotation recovery of pure hematite, siderite, and quartz in the oleate-starch-CaCl₂ system is significantly different when the slurry pH varies from 4 to 12. A novel two-step flotation process was developed for the separation of iron concentrate from Donganshan carbonaceous iron ore through which the siderite concentrate is first recovered and the high quality hematite concentrates with relative high iron recovery can be obtained in the second step flotation. The siderite concentrate may be utilized directly or undergo further concentration steps to increase iron grade.     

Orthogonal design and numerical simulation of room and pillar configurations in fractured stopes

Room and pillar sizes are key factors for safe mining and ore recovery in open-stope mining. To investigate the influence of room and pillar configurations on stope stability in highly fractured and weakened areas, an orthogonal design with two factors, three levels and nine runs was proposed, followed by three-dimensional numerical simulation using ANSYS and FLAC3~. Results show that surface settlement after excavation is concentrically ringed, and increases with the decrease of pillar width and distances to stope gobs. In the meantime, the ore-control fault at the ore-rock boundary and the fractured argillaceous dolomite with intercalated slate at the hanging wall deteriorate the roof settlement. Additionally, stope stability is challenged due to pillar rheological yield and stress concentration, and both are induced by redistribution of stress and plastic zones after mining. Following an objective function and a constraint function, room and pillar configuration with widths of 14 m and 16 m, respectively, is presented as the optimization for improving the ore recovery rate while maintaining a safe working environment.     

纸制品中总砷的测定方法验证

为验证采用原子荧光光谱仪法测定纸制品中砷和无机砷含量的准确性与可靠性,本文对《食品中总砷及无机砷的测定》(GB5009.11-2014)第一篇总砷检测中的方法原子荧光光谱法进行验证。通过对该方法的线性、线性范围、检出限、定量限、精密度及加标回收率6个参数进行验证,说明本检验中心的实验室能展开此方法的检测。     

处理回收非铁金属灰的工艺方法及装置

这种工艺方法及其生产装置，特别适合于铝灰的回收处理。其特征在于将熔融的非铁金属灰浇入一个下部带有通孔的模具内，对模具内的非铁金属灰进行挤压，从通孔中流出的非铁金属熔液进行收集，浇注在模具上制成成品。该装置主要有上下两个模具构成，上模具与下模具的弧度相同，上模具可以无空隙装在下模具内。本发明的目的主要是为了解决对非铁金属灰的回收率低、污染环境等方面存在的问题。     

液压混合动力工程车辆联合制动系统优化与仿真

针对液压混合动力工程车辆制动系统能量回收率较低的问题,以某混合动力装载机为原型对其联合制动系统中的再生制动系统进行分析,对影响系统能量回收率的主要参数采用遗传算法进行优化,并对优化过的系统在整车仿真模型中进行仿真验证。仿真结果表明:系统优化后车辆的能量回收率得到了显著的提高,达到了节能减排的目的。     

土耳其Aladag氧化铅锌矿的浮选

一项主要针对土耳其开塞利省Aladag氧化铅锌矿石浮选的研究，对浮选段数、药剂用量以及浮选前重选对铅精矿品位和浮选效率的影响进行了试验。试验表明：分段加药对浮选很有效，增加加药段数可以提高精矿铅的品位和回收率。增加硫化钠的用量对浮选铅有明显的效果，而硫酸锌的加入对铅的浮选没有影响。     

2009最受大学生欢迎品牌大型有奖调查

此次问卷调查现场共收到问卷反馈64419份,有效调查票数共633.8份。其中通过电脑节现场回收的问卷为31715份,网络回收问卷29733份,杂志附送问卷答题卡回收2971份。另经统计．电脑节现场派发共35000份问卷．现场问卷有效回收率为90.6％。