1.LTD are: alumina 15%~25% iron oxide 25%~35% silicon oxide 15% - 25% sodium oxide 5% - 15%, some magnesium oxide and calcium oxide ,So much iron oxide in the red mud leads to the limitation of precipitation tank of Bayer process and adds the burden of sintering process.
第二氧化铝厂赤泥的主要成分为:氧化铝15%～25%,氧化铁25%～35%,氧化硅15%～25%,氧化钠5%～15%,其次还含有少量的氧化镁、氧化钙等。
2.The calcium oxide in the barium aluminates participates in constituting 2BaO·CaO·Al2O3. It makes the utilizable barium oxide stable.
氧化钙的作用在于参予组成了2BaO·CaO·Al_2O_3相成分,稳定了可利用氧化钡。
3.Using calcite as raw material,adding ZrO 2 by wet chemical method,dropping Cr 2O 3 by vapor diffusion method,hydrating light calcined calciun oxide by aqueous vapor and eliminating the crack formed during sintering,the high purity hydration resistance calcium oxide refractory was developed with CaO content of>98%,bulk density of 3.25g/cm 3, cold compressive strength of>150MPa and increase in weight of<1% due to hydration in atmosphere for 60 days.
以石灰石为原料，采用湿化学方法添加ZrO2，气相扩散方法掺入Cr2O3，水蒸汽消化轻烧氧化钙和消除烧成过程中产生的裂纹等技术，获得了CaO含量＞98％，体积密度为3．25g／cm3，抗压强度＞150MPa，大气存放60天水化增重率＜1％的抗水化高纯氧化钙材料。
4.This paper carried on the compared test of seven species buffers,which is ammonium hydroxide,ammonium bicarbonate,magnesium oxide,calcium oxide,sodium hydroxide and ethanolamine,to study the effect of them on the efficiency of buffers and properties of pulp in the high yield ammonium sulfite pulping of tobacco.
本文对氨水、碳酸氢铵、氧化镁、氧化钙、氢氧化钠、尿素和乙醇胺等7种缓冲剂(缓蚀剂)在烟杆亚硫酸铵(亚铵)高得率制浆中的缓冲效果和对浆料性能的影响进行了对比试验。
5.a substance (such as calcium oxide) that absorbs water and is used to remove moisture.
被用来除去湿气的物质（例如氧化钙）。
6.The skimming efficiency and flow rate of hot metal are 97.6% and 14. 9t/min respectively so as to meet the reguirements of vanadium recovery from hot metal. The content of calcium oxide in vanadium slag decreases to 1.28%.
撇渣效率达到97．6％，铁水流量为14．9t／min，满足了后序提钒工艺的要求，使钒渣中CaO含量下降到1．28％。
7.A rare plagioclase feldspar with high calcium oxide content occurring in igneous rocks.
钙长石一种氧化钙含量很高稀有斜长石，多出现于火成岩中
8.Technological Research on Roast of Baotou Rare Earth Concentrate Added by Calcium Oxide
包头稀土精矿添加氧化钙焙烧工艺研究
9.It also decreases the thermal stability of HA, which deco_mposes into tricalcium phosphate and calcium oxide.
含锶羟基磷灰石的衍射峰向低角度偏移 ,峰宽而弱 ,其热稳定性变差 ,分解出磷酸三钙和氧化钙 ;
10.For [S]≥0.015 % of the liquid steel on the terminal point,the average of desulphurizing rate about the calcium oxide desulphurizer is up to 43.59 %(29.41 % to 67.86 %);
对于冶炼终点[S]≥0.015%的钢水,钙基脱硫剂脱硫率平均高达43.59%(范围29.41~67.86%);
