提高永平铜矿选铜回收率的试验研究

永平铜矿选矿厂采用中矿循序返回的铜硫混合浮选-铜硫分离浮选工艺流程,因中矿单体解离不充分而影响铜的回收。为此,采用中矿选择性分级再磨新工艺进行了旨在提高永平铜矿选铜回收率的实验室试验和工业试验。实验室试验结果表明,与原工艺相比,新工艺铜回收率可提高0.64个百分点,同时铜精矿品位可提高0.43个百分点;工业试验中新工艺铜回收率提高了0.89个百分点,铜精矿品位提高了0.38个百分点,证明了新工艺工业实施的可行性。     

X射线检测海水鱼片中鱼刺

通过X光机设备参数优化、鱼刺分布规律总结及冷冻结合X光机技术3 个方面对X射线检测鱼刺效果进行研究。结果表明,大部分海产鱼片产品的最优检测参数为：电压范围30～45 kV、电流范围3 000～6 000 μA、亮度范围4～6;通过鱼刺分布规律总结,鱼片在冷冻状态下鱼刺的检出率均高于解冻状态下鱼刺检出率,且冷冻状态下人工读X射线图判断鱼刺更接近于实际情况。通过X光机设备参数优化、鱼刺分布规律总结的学习及冷冻结合X光机技术可改善图像质量和提高残留鱼刺检出率,改善水产品加工企业X光机检测人员的视觉感受并一定程度上解决海水冷冻鱼片产品鱼刺残留问题。     

飞艇囊体薄膜材料的双向拉伸试验及结构仿真

飞艇囊体膜材的弹性常数是飞艇外形设计、结构分析、动力学分析的基础。本文根据正交异性平面应力模型假设,应用双向拉伸试验方法获得了飞艇囊体膜材HV130在不同载荷比条件下的经纬向弹性模量和泊松比。对飞艇囊体进行应力分析,得到囊体应力的理论解及环向应力和轴向应力的载荷比。根据飞艇囊体受力情况,选取对应的弹性常数,对飞艇进行不同压差条件下的静力学仿真分析。利用非接触应变测量系统测试不同压差条件下飞艇囊体的变形情况,验证了双向拉伸试验所得的弹性常数的准确性和仿真分析的可靠性。本文能为飞艇的外形设计和结构分析提供参考。      

油井产出状态下测井找漏工艺方法的研究及应用

常规套损井找漏方法主要包括封隔器分段封堵试压法和井温剖面找漏法。以上两种方法均根据破漏段吸水的原理找漏,优点是直观,且能准确掌握破漏段吸水状况。但对于部分油井井筒缩径变形、存在多个漏点或吸水启动压力高的漏点（现场生产过程中出现的“只出不进”现象）采用以上两种方法均无法准确找出漏点位置,且采用高压挤水极易造成套管的二次损伤和地层伤害。为此,根据油井测量产液剖面的原理,设计了产出剖面状态下测井找漏工艺和解释方法,并在沙20-31等井进行了应用,均成功找出了具体破漏段位置,为后期措施提供了有力保障。其中沙20-31井措施后增储、增产效果显著。     

吐玉克油田深层稠油天然气吞吐技术研究与应用

吐玉克油田深层稠油油藏构造复杂,储层物性差,单井产量低,以常规的开采方式和井筒工艺无法实现经济有效开发。通过对吐玉克油田深层稠油进行天然气溶解与降黏室内实验,以及利用GEM进行天然气吞吐开采方式的数值模拟与相平衡研究,最终优化了吞吐参数。对3口井进行了天然气吞吐现场试验,结果表明:通过采用天然气吞吐技术,吐玉克油田深层稠油单井产量提高了2～7倍。     

珠江口盆地白云深水区沉积充填演化及控制因素分析

白云深水区在新生代经历了裂谷断陷、断拗、热沉降拗陷等构造演化阶段,相应发育了裂谷断陷期文昌组多个半地堑陆相河湖沉积,断拗期恩平组大型湖盆沉积、从断拗向热沉降拗陷过渡的珠海组海相浅水陆架一陆坡深水沉积,以及23.8 Ma之后的热沉降拗陷期海相陆坡内盆地深水沉积,形成了独特的多个盆地叠置的沉积充填模式和断陷-断坳-坳陷的三层盆地结构,从而在时间和空间上构成了有利的生储盖组合条件.构造演化、古地理、物源供给条件和相对海平面变化等多种因素控制了白云深水区的沉积充填演化;发生于23.8～21.0 Ma的白云运动,是白云深水区裂后海相沉积充填的主控因素,使得古珠江的物源体系和陆架坡折带发生迁移,形成了珠海组海退进积型与珠江组-韩江组海侵加积型层序组合,这两个层序组合均发育大规模深水扇砂岩.     

Effects of tea polyphenols on the activities of α-amylase,pepsin, trypsin and lipase

Tea polyphenols (TP) possess many beneficial properties, such as reducing the risk of cancer and heart diseases, and acting as natural antioxidants for the food industry. At the same time, tea polyphenols might inhibit digestive enzymes and reduce food digestibility. To explore this possible antinutritional property, the effects of tea polyphenols on the activity of four typical digestive enzymes were investigated. HPLC analysis of the tea polyphenols extracted from Chinese green tea indicated that their catechin content was 93.6% (w/w), and that the content of ester bond-containing polyphenols was more than 82%. Measurement of the interaction of gelatin with tea polyphenols was first carried out, in order to model enzyme protein–TP interaction. It proved that tea polyphenols were capable of binding and precipitating protein, suggesting a potential ability of TP to denature digestive enzymes. In addition, the inhibitory effects of tea polyphenols on α-amylase, pepsin, trypsin and lipase were studied. In the presence of 0.05 mg/ml tea polyphenols, the inhibition ratios of α-amylase, pepsin, trypsin and lipase were, respectively, 61%, 32%, 38% and 54%, suggesting that TP might possess antinutritional properties.     

多孔载体海绵对CH4-N2-O2瓦斯气体水合分离影响（英文）

The findings were presented from laboratory investigations on the hydrate formation and dissociation processes employed to recover methane from coal mine gas.The separation process of coal mine methane(CMM) was carried out at 273.15K under 4.00 MPa.The key process variables of gas formation rate,gas volume stored in hydrate and separation concentration were closely investigated in twelve THF-SDS-sponge-gas systems to verify the sponge effect in these hydrate-based separation processes.The gas volume stored in hydrate is calculated based on the measured gas pressure.The CH4 mole fraction in hydrate phase is measured by gas chromatography to confirm the separation efficiency.Through close examination of the overall results,it was clearly verified that sponges with volumes of 40,60 and 80 cm 3 significantly increase gas hydrate formation rate and the gas volume stored in hydrate,and have little effect on the CH4 mole fraction in hydrate phase.The present study provides references for the application of the kinetic effect of porous sponge media in hydrate-based technology.This will contribute to CMM utilization and to benefit for local and global environment.     

注水对煤层吸附瓦斯解吸影响的试验研究

水力化措施在煤矿开采中广泛应用,为了研究注水对煤层瓦斯解吸的影响,采用高压吸附-注水-解吸测试装置对不同吸附平衡压力和水分条件下煤对瓦斯的置换解吸量、卸压解吸量及总瓦斯解吸量进行了测试计算。结果表明:注水过程中及注水一段时间内煤样罐瓦斯压力呈现出继续增高的趋势,说明注入的水置换出了煤体吸附的瓦斯,且水分越高,置换解吸量越大,测试的最大置换量可达11.88 mL/g;卸压后,注水煤样的瓦斯解吸量减小,且水分越大,瓦斯解吸量降幅越大,降幅最大值可达68.29%;注水后煤的总解吸量增大,说明注水对试验煤样的瓦斯解吸起促进作用。     

酒东油田腐蚀原因分析及防护措施

在排查影响油井腐蚀因素的基础上,通过对酒东油田油井腐蚀产物的外貌形态及X线衍射分析,确定油井腐蚀主要因素是油井采出液含水矿化度高导致的电化学腐蚀和CO2腐蚀、O2腐蚀及垢下腐蚀.此外,抽油泵偏磨导致防护层脱落加剧了电化学腐蚀.针对腐蚀因素实施了耐蚀材料、涂层防腐、牺牲阳极、化学药剂防腐措施,并在现场进行试验及监测,试验结果表明:对腐蚀因素较多的油井,采取耐腐蚀材料和加注化学药剂可以有效控制油井的腐蚀.