查询词典 alumina

A process for treating the sludge generated by alumina sewage treating system incldues such steps as pumping the alumina sewage in sand depositing pool then in depositing pool, mixing the bottom sludge, the sewage from sand-water separator, and the regenerated water from filter to obtain backflush water, heating in desilicating heater, washing the secondary red mud to recover Na2O and Al2O3, anjd returning the washing liquid containing Na2O and Al2O3 back to the flow of production of alumina.

本发明公开了一种氧化铝废水处理系统的污泥处置新工艺，它将氧化铝废水先进入沉砂池中进行沉砂处理后才进入沉淀池中，将虹吸泥机从沉淀池中吸出的底流污泥和砂水分离器分离出的污水以及将部分经过滤器过滤后所得的再生水作为反冲洗水一起通过污泥泵送到脱硅加热器中加热得污泥热水，然后将污泥热水用于二赤泥洗涤沉降，以回收赤泥附着的Na2O和Al2O3，将洗涤赤泥后含有Na2O和Al2O3的洗液送到氧化铝生产流程中重新使用。

This study examined the alumina ceramic membrane to deal with high turbidity water flux changes in the law of decay was found in the early running flux decay rapidly, the latter tends to slow decay, a linear decline in the overall. 51qikan.

Key words： high-alumina ceramic membrane separation of water turbidity摘要：本实验研究了氧化铝陶瓷膜处理高浊度水时膜通量衰减变化规律，发现运行初期膜通量衰减很快，后期衰减趋于平缓，总体成线性下降。

The key products of the company are high alumina brick ,fireclay brick ,phohate-bonded wearable brick,exfoliation-resistant high alumina brick,High refractorine under load brick,corundum brick,magnesite brick,magnesite chrome brick,series of corundum,SIC furnace chamber and pipe , ceramisite brick, corundum-mullite brick,corundum-chrome brick,sillimanite brick,magnesite alumina inel brick,acid-resistant brick,alkali-resistant brick , zirconia-corundum brick , alumina bule products, series thermal iulating refractory products ,high alumina castable,corundum castable ,corundum ramming ,brown-corundunm castable ,SiC castable ,low-cement castable ,alkali resistant castable ,Light silica alumina products, stainle steel fibre reinforced castable ,etc.

主要产品有：高铝质砖、粘土质砖、磷酸盐耐磨砖、抗剥落砖、高荷软砖、刚玉砖、碳化硅砖、镁砖、镁铬砖、各种刚玉、SIC炉膛、炉管制品、陶粒砖、刚玉莫来石砖、铬刚玉砖、硅线石砖、镁铬尖晶石砖、耐酸砖、耐碱砖、锆刚玉砖、氧化铝空心球制品及各种轻质保温材料、高铝质浇注料和刚玉浇注料、捣打料、棕刚玉浇注料、碳化硅浇注料，低水泥浇注料、抗碱性浇注料、轻质硅酸铝制品、钢纤维增强浇注料等80余种系列耐火材料。

The additive can destroy the structure of the high-alumina iron ore and create conditions for the Al-Fe separation, which is especially suitable for the Al-Fe separation of the high-alumina iron ore when iron ore and alumina ore are embedded by fine particles or alumina exists in isomorphous form in iron mineral.

所用添加剂能破坏高铝铁矿石的结构，为铝铁分离创造条件，特别适合于铁矿物和铝矿物以微细粒嵌布，或铝以类质同象形式存在于铁矿物中的高铝铁矿石的铝铁分离。

A wet chemical method was cidopted to introduce alumina sol to surface-modification of alumina bubble and in-situ decomposition characteristics, distribution of alumina sol, mi-crostructure and mechanical properties of surface-modified alumina bubble were studied by SEM, XRD, Coulter LS Particle Size Analyzer and self-preparation experimental device for measurement of compressive resistance.

采用湿化学的方式引入铝胶对氧化铝空心球进行表面修饰改性；采用SEM、XRD、激光粒度仪和自制耐压装置研究铝胶分解特性、分布状态、氧化铝空心球表面改性前后显微结构及力学强度变化。

Finally, four kinds of infiltration glass powder with specified color were developed successfully. The color and its stability of infiltration alumina ceramic were tested. The color match between alumina core ceramic and the Vitadur Alpha veneering ceramic were also tested. The physical and mechanical properties of infiltration glass and alumina core ceramic were investigated.

考察了玻璃渗透后铝瓷的颜色及稳定性，并与VitaIn-Ceram作对比，研究了用自行研制的玻璃粉渗透铝瓷后的颜色与VitadurAlpha饰面瓷的颜色匹配性，测试了渗透玻璃及玻璃渗透铝瓷的物理及力学性能，使CAD／CAM用玻璃渗透氧化铝陶瓷达到临床应用水平。

The stability of nano-alumina aqueous dispersion is tokened by spectrophotometer and particle size distribution instrument. It is proved that when condition is dispersant PMAA =0.4%, pH =9, nano-γ-alumina content = 4%,ultrasonic for twenty minites, excellent stable nano-alumina aqueous dispersion can be acquired.

用分光光度计和粒度分析仪表征了纳米粒子水分散液的稳定性，结果表明纳米γ相Al2O3浓度为4%，分散剂为阴离子聚电解质，用量0.4%，PH=9，采用超声波分散20分钟得到最好的分散效果，纳米颗粒的平均粒径为205nm。

The results from the experiment are: the amount of all micro-powders that grain sizes are less 0.044 mm should be less than 35% in weight, and the value of coarse q and attenuate q should be respectively 0.23 and 0.32, and the additive amount of active a-alumina and calcium alumina cement should be respectively 7% and 4% in weight, meanwhile, the best dispersant is PMAA-NH4 in the non-microsilica system; while the value of two q should be respectively 0.21 and 0.29, the amount of active a-alumina, microsilica and calcium alumina cement should be respectively 6%, 2% and 4% in weight, the best dispersants are sodium hexamer taphosphate and Na2P3Oio in the microsilica system.

依照上述实验方法得出刚玉自流浇注料所必备的条件：刚玉自流浇注料中的细粉(-0.044mm)总量应小于35％；在无硅微粉系统中的Andreassen公式的粗端q值和细端q值分别为0.23和0.32，氧化铝微粉、水泥的最佳加入量是7％、4％，且所使用的分散剂为改性聚丙烯酸钠最好，而在含硅微粉系统中的Andreassen公式的粗端q值和细端q值分别为0.21和0.29，氧化铝微粉、硅微粉和水泥的最佳加入量为6％、2％和4％，最好合用三聚磷酸钠和六偏磷酸钠作为分散剂。

Below 300 300 to 1200 Ordinary Portland or Portland blastfurnace Ordinary Portland or Portland blastfurnace Sulphate resisting Supersulphated Sulphate resisting or Supersulphated High alumina Sulphate resisting or Supersulphated High alumina Sulphate resisting or Supersulphated with adequate protective coating High alumina Minimum cement content (kg m-3) Type of cement Maximum size of aggregate 37.5 240 290 240 270 290 290 330 330 330 330 19.0 280 330 280 310 330 330 370 340 370 370 9.5 330 380 330 360 380 380 420 410 420 420 0.55 0.50 0.55 0.50 0.50 0.45 0.45 0.40 0.45 0.35 Maximum water-cement ratio 0.5 to 1.0 1.0 to 2.0 1200 to 2500 2500 to 5000 Over 2.0 Over 5000 Wear

这些气 穴通常由具有格外高能量的水蒸气所填充，与混凝土表面的反复接触导致形成凹陷和孔洞，即气蚀。既然高质混凝土也不能抵抗这种劣化，因此最好的补救是通过制造平滑水流来消除气蚀。在所有必须的地方，关键的面上衬以高抗气蚀性的材料。通常，混凝土抗腐蚀和磨损的能力随强度增加而提高。采用硬韧的集料可改善混凝土的抗磨损性。

Each group has 10 models made in IPS-Empress and 10 made in In — ceram Alumina.

每组20个，IPS-Empress和In-ceram Alumina各10个，在微机上建立天然牙的三维有限元模型。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。