侵蚀循环

The preventive measures for the harmful defects of alkali metals are as follows: 1, reducing the alkali metals content in the raw materials; 2, increasing the MgO content of the sinter , decreasing the basicity of slag , decreasing the Si content of the pig iron, increasing relative slag volume; 3 , introducing prereduced ore pellets or partly reducted sinter; 4increasing the ability of coke resisting alkali metals; 5, using refractories that have the ability of resisting corrasion of alkali metals; 6 , cleaning the blast furnace periodically. The above recommendations are necessary for decreasing the circulation and accumulation of alkali metals effectively in blast furnace, reducing the harmful influence of alkali metals on blast furnace, increasing the smelting intensity, decreasing the coke rate, improving the gas permeability.

基于碱金属对高炉冶炼的上述危害，本文结合湘钢高炉的实际生产情况，通过理论分析、计算以及其他钢厂防治碱害的经验，提出防治高炉碱害的措施：1、减少入炉原、燃料的碱金属含量；2、提高烧结矿中的MgO含量、降低炉渣碱度、降低生铁含硅量、适当增加渣量；3、采用预还原的金属化球团或部分还原的烧结矿；4、提高焦炭的抗碱能力；5采用抗碱侵蚀的耐火材料；6、周期性性洗炉，以有效地减少碱金属在高炉内的循环富集，降低碱金属对高炉的危害，提高高炉的冶炼强度，降低焦比，改善高炉透气性。

Cyclic voltammetry indicated that there were Cr→Cr, Cr →Cr oxidation reaction on anode, while there were Cr→Cr, Cr→Cr, Cr →Cr deoxidization reaction on cathode. The graphite electrodes treated by acid and heating could enhance the reversibility and kinetic of the electrode reaction. The nature graphite electrodes had been eroded during charge/discharge process, while the graphite electrodes by activation could avoide corroding by hexad chromium ion. The reversibility and kinetic of the electrode reaction of chromium ion on activation electrode had been increased, so which indicated that graphite surface augment oxygenous function corps which could increase electrode hydrophile capability.

循环伏安实验表明：铬液流电池的电极反应非常复杂，在阳极存在Cr→Cr，Cr→Cr的氧化反应，在阴极存在Cr→Cr，Cr→Cr，Cr→Cr的还原反应；热处理的石墨电极和重铬酸钾处理的石墨电极能提高电极反应的活性和可逆性；在充放电实验中未处理的石墨电极发生严重腐蚀；分别用这两种方法处理过的石墨电极具有防止六价铬侵蚀的功能；铬离子在活化处理过的石墨电极上的反应活性和可逆性增加，可以认为：重铬酸钾溶液活化处理和加热处理后的石墨表面的含氧官能团增加，电极亲水性增强。

Based on the dry-wet cycling experiment of concrete and micromechanics, the study of mechanical properties of concrete in seawater erosion is carried out.

基于混凝土干湿循环试验和混凝土细观力学，对混凝土在海水侵蚀环境下力学性能的变化进行了研究。

The NITROGEN CYCLE. Some of these cycles are regulated mainly by weathering.

这些循环中的一些是由物理因子调控的，例如磷循环的主要限制因素是通过岩石的侵蚀作用缓慢释放的磷酸盐。

The theories of erosion cycles and physiographic stages are important theories of geomorphology.

侵蚀循环理论和地文期理论是地貌学的重要的基本理论。

By micro-analysis on the aging fibers, it indicates that attack of alkali hydrates to vegetable fibers is serious and the flexibility becomes lower and the brittleness becomes increase for the calcium hydroxide crystal conglomerated in the fibers bosom.

通过对老化后纤维的微观分析发现，水泥水化后的碱性物质对天然植物纤维的侵蚀较大，Ca_2晶体在纤维内腔中的沉积使纤维的柔性降低，脆性增加，在长期干湿循环作用下，纤维水泥基材料的抗折强度下降。

The test result of a sulphate resistance agent for the concrete used on canal system is introduced herein.

介绍了一种用于渠系混凝土的抗硫酸盐侵蚀剂的室内试验研究结果，试验内容包括单纯硫酸盐条件下的侵蚀试验、硫酸盐结合C l-和Mg2+条件下的侵蚀试验以及干缩循环条件下的侵蚀试验。

The team members ask the families a number of questions that pertain to the project. These include, among others, questions about the frequency and scale of flooding events by the river, the movement of the river channel, erosion, their migratory cycle during the year, whether they cultivate and/or collect wild plants, their views about the archaeological sites, etc.

队员们向采访家庭提出各种各样与研究计划有关的问题，其中包括河中发洪水的频率和规模，河床摆动、侵蚀，一年之中的迁徙循环周期，是否栽培或者采集野生植物，以及他们对考古遗存的看法等等。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。