排序方式: 共有11条查询结果,搜索用时 0 毫秒
1.
以华兴水库为例,对大坝坝基和坝体渗漏原因进行分析,对水库大坝存在的问题进行论述,通过对大坝的稳定计算,得出大坝不稳定原因。基于此,以大坝的加固设计为核心,对上游和下游的护坡进行设计,通过对渗流量和渗透系数的研究,计算土坝渗流能力,校核大坝断面的稳定性,可为类似项目的加固除险提供参考。 相似文献
2.
3.
4.
5.
SCO is a selective dolomite deperessant in theflotation system of collophane and dolomite.Howvever,experi-ments confirmed that reverse phenomenon would occur forsome phosphatic mines.In order to explain the SCO depress-ing mechanism,this paper describes studying results on the ef-fect of dissolved ions on SCO depressing property using ul-traviolet absorption spectra.It is found that the effect of dis-solved ions,especially Ms~(2 ),on the SCO adsorption propertyis strong.When Mg~(2 ) concentration is low,dolomite adsorbsSCO and is depressed.When Mg~(2 ) concentration is more than90g/t in pulp,SCO adsorption capacity on colophane is obvi-ously greater than that on dolomite,which results in the de-pression of collophane.The adsorption results are consistentwith flotation results. 相似文献
6.
7.
PREPARATION OF ACTIVATED CARBON FROM TWO CHINESE ANTHRACITES IN THE PRESENCE OF OXIDATIVE ADDITIVES 总被引:1,自引:0,他引:1
This paper broke with the conventional ways of oxidizing and catalyzing. It researcheda new way to prepare activated carbon from anthracites which employed oxidative additives. Itinvestigated the effects of the additive on adsorption and activation rate of the resultant activatedcarbon. The results showed that the new additives not only improved the adsorptivity but alsoincreased the activation rate greatly, which is able to decrease the preparation cost. 相似文献
8.
<正> 目前研究的除去煤中无机物质的方法,主要有化学处理法、与微波技术并用的化学处理法以及微生物处理法等。本文研究的是根据煤中有机质与无机质粒子表面性质的差异用湿式造粒的方法将其分离。湿式造粒是指在细微粒煤的煤浆中加入重油、煤油等亲油性的造粒剂,高速搅拌,以造粒物的形式回收煤中有机物质1 实验装置及实验方法1.1 试样的制备用常磐煤及三池煤作试验煤样。从原煤样中手选出直径为5~10cm 的块煤,将它们 相似文献
9.
10.
首次提出了采用多面空心球内装磁铁块制作的磁化帘降尘新方法.通过推导气固两相流动相似准则,确定了模型的单值性条件,设计了相似模拟实验的巷道模型并进行了磁化帘降尘模拟实验.结果表明:在较小的通风阻力下,磁化帘最高可达到近70%的降尘效率 相似文献