关于正确界定水库取水量的探讨

为了保证正常兴利供水的需要,水库调度运行中均要计入一定的水库损失量,而这一损失水量也是直接从江河取蓄的,在运行当中虽已损耗,但也应计入取水量,这也符合法律的规定.     

钙基膨润土的酸化改性研究

研究了高温灼烧、酸种类，硫酸浓度，反应时间、温度和粒度等，对钙基土制备酸性膨润土的工艺条件的影响。     

Investigation of Creep Feed Grinding Parameters and Heat treatment Effects on the Nickel-base Superalloys

The Nickel base Superalloys are the most famous complicated and useable of Superalloys to make hot zone components of the gas turbines. The complicated dimensional tolerances, specially at the root of the blade show importance of grinding processes at the production of blades root. The prediction of the effect of machining parameters on the soundness of component surface strengthening for reaching to a suitable surface finishing and avoiding from crack formation at the work part during machining operation often is not easy and feasible so needs to more industrial investigation.This research is about frame 5 blade designed by GE and made from Superalloy IN738LC has been investigated. The formation of a plastically deformed and heat affected zone during grinding of Superalloy IN738LC with a high depth of cut but slow work speed (creep feed grinding) was investigated. Parameters such as work speed, depth of cut and radial dressing speed have been considered as variables and their effects have been studied. During experimental performed, the voltage and current of motor measured and power and special energy calculated.Some samples heat-treated (of the 1176℃ for 1 hr under neutral argon gas and cooling rate of 15℃/min up to 537℃ and then air cooling) to study grains recrystallization. Other samples have been created from the roots of blades and then coated by Nickel to measure boundary layer micro-hardness. The results show that increasing work speed leads to increasing the use power. Increasing the depth of cut, by increasing material removal rate, and the radial dressing speed, by decreasing power, lead to decreasing special energy. The temperature created by grinding lead to decreasing plastic deformation and boundary layer formation. When the radial dressing speed changes from 1 to 0.6μm/rev and other parameters are kept unchanged the roughness of surface increases and the special energy decreases. Sufficient dressing is very essential in limiting the width of the molten zone to few micrometers. As a result, it was found that local melting at contact spots to be a rather common mechanism during grinding of superalloys, lead to so-called white layers which can easily be observed on metallographic cross sections.     

SUS304冷轧不锈钢退火氧化铁鳞损失试验分析

通过采用在不锈钢冷轧薄板退火酸洗机组工艺段提取的SUS30 4冷轧不锈钢试样进行模拟试验 ,证明了张家港浦项不锈钢有限公司退火酸洗工艺条件合理 ,并得出了退火酸洗后的铁鳞损失量     

树脂砂造型生产线的改造

从现今树脂砂技术及设备的状况出发,紧密结合生产实际状况,进行整体改造方案的设计、设备的选型、调试及相关工艺的改进等工作.从目前的使用状况来看,改造基本达到了预期的目的.     

真假香油识别法

(1) 取有嫌疑茶叶和真茶叶各数片,分别放在酒精灯上灼烧,真茶叶有馥郁芳香,假茶叶只有其他异味。 (2) 抓取可颖茶叶和真茶叶各一小撮,分别用开水冲泡两次开汤湿看,每次泡10分钟,待叶子充分泡开展后,分放在两个白瓷清水盘内,仔细观看叶形、叶脉锯齿等征,真茶叶具有明显的网状叶脉,主脉直接射顶端,侧脉伸展至叶缘2／3的部位便向上方弯曲,呈弧形与上方支脉相联合,叶背面有白茸毛,叶的边缘锯齿显著,基部锯齿稀疏。假茶叶的叶脉不明显,一般侧肪直射边缘,有的正反两面都有白毫,叶边缘锯齿一般明显,或锯齿粗大。     

银精矿回收锌及铜的综合利用研究

银精矿灼烧,使其脱出一部分硫,使锌、铜形成酸可溶物,而银则不被浸出留在渣中达到富集的目的,锌酸浸出后进入电锌系统回收锌;浸出的高价铜离子经锌粉置换后可作为溶液中氯离子的沉淀剂,从而达到除去溶液中氯离子的目的。     

郑州矿区煤层瓦斯含量快速测定方法研究

井下煤层瓦斯含量快速测定对于有效落实防突措施、保证煤矿安全生产具有重要意义。通过研究影响瓦斯含量测定的各种因素,确定了解吸量与瓦斯含量的正相关关系,总结了郑州矿区瓦斯含量与煤样粒度、瓦斯浓度、解吸量之间的关系,确定了快速测定瓦斯含量的办法。     

综放工作面损失量分析及提高回采率的措施

通过对综采放顶煤工作面损失量进行分析,提出提高放顶煤工作面回采率的措施,给予一定的指导与借鉴。     

四川成都 市场休眠盘整夏令三样走热

烈日炎炎，气温骤升，成都荷花池宏正玩具市场整体人流商气跟被暑热灼烧得心烦息乱的人群一样，进入了昏昏欲睡的休眠盘整期。大宗普通商品出货总量较之旺季下降了三成左右，除为数不多的几个品种外，其采都处于终端补贷销售和散客零售状态。