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.     

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％。     

库仑滴定法测定工业废水中微量砷

以库仑滴定法测定工业废水中微量砷，以死停终点法确定滴定终点，最后以EXCEL处理实验数据，本方法具有灵敏度高，准确，简便快速，仪器便宜，易于推广的特点，特别适用于工厂及县级以下环境监测站进行水中微量砷的检测，方法的回收率为99．3％。     

Flotation performances of polymorphic pyrrhotite

The floatability of different crystalline structures of pyrrhotite (monoclinic and hexagonal) was studied. It is shown that the floatability of monoclinic and hexagonal has obvious difference, and that the flotation recovery of monoclinic pyrrhotite is larger than that of hexagonal pyrrhotite using different collectors. When butyl dithiophosphate is used as the collector, the recovery is larger than that by sodium butyl xanthate and sodium diethyl dithiocarbamate. At the pH values ranging from 6 to 9, monoclinic pyrrhotite can be floated well, and the flotation recovery is higher than 90%. Monoclinic and hexagonal pyrrhotites are more easily activated by Cu²⁺ in acidic conditions than in alkaline conditions. But Cu²⁺ cannot activate hexagonal pyrrhotite using sodium diethyldithiocarbamate as the collector. By the measurement of contact angle, it is indicated that monoclinic and hexagonal pyrrhotites float well and are easily activated by Cu²⁺ when dithiophosphate is used as the collector. Using sodium diethyl dithiocarbamate as a collector, the relationship between potential and pH range for pyrrhotite flotation is established. At pH 5, the optimal potential range for flotation of monoclinic pyrrhotite is about 125–580 mV (vs SHE), with the maximum flotation occurring at about 350 mV (vs SHE); the optimal potential range for flotation of hexagonal pyrrhotite is 200–580 mV (vs SHE), with the maximum flotation occurring at about 300 mV (vs SHE).