The wall rock of ore - bodies is the siliceous dolostone and alkaline volcanic rock ( trachy andesite ) in the yinachang deposit. based on the shape of ore - bodies and the structure and texture of ores, the deposit was identificed as synsedimentary with wall rocks. there occurred ree minerals, such as bastnaesite, monazite and allanite, associated with apatite and fluorite with ree contents to a certain extent
礦體產出形態和礦石的結構構造等均顯示礦體與賦礦地層同沉積特徵;出現獨立礦物氟碳
鈰礦、獨居石及褐簾石,磷灰石、螢石、菱鐵礦等礦物中也含有一定量的稀
土,沿礦體走向和垂向稀
土元素變化不大。
Most of them take the lead on some subjects. the company is based on science and technologhy and develops continuously new products and new processes. they researched and developed a new precess " producing mixing rare earth metal directly from bastnaesite " which has advanced stage in the world and has applied for china patent
公司以科研和技術開發為基礎,不斷開發新產品和新工藝,研製開發了「氟碳
鈰礦直接電解生產混合稀
土金屬」這項具有國際先進水平的新工藝,並申請了專利。
According to the sample prepared by hydrothermal method, the doping cations can enter the spinel lattice. rare earth cations mostly occupy position b because of their big radius. cerium are oxidized to ce4 +, whose radius is relatively small, and ce4 + mostly occupies position a. as a whole, the coercivity of cobalt ferrite doped with rare earth element is bigger than that of pure cobalt ferrite
結果表明,對水熱法制備的鐵氧體粒子,雜質離子能夠進入其尖晶石晶格中,並因稀
土離子的半徑較大,而絕大部分佔據尖晶石的b位,
鈰元素因被氧化成為四價離子,離子半徑相對較小,而主要佔據a位。
The rare earth ferro silicon cerium accounts for 46 - 50 % of total rare earth, we can accurately adjust the percentage content of rare earth alloy according to the clients request
稀
土硅鐵合金
鈰/占稀
土總量的46 - 50 % ,根據用戶的需要,可準確地調整稀
土合金的百分含量。
The project content : with the high - grade ore concentrate of rare - earth and the selecting of the advanced extraction separation production technics, the work processes ore concentrate 3, 000 tons per year and produces the high - purity oxygen cerium ( reo99. 99 % ) and the series products
項目內容:用高品位稀
土精礦,選用國內外先進的全萃取分離生產工藝,年處理稀
土精礦3000噸,生產高純氧化
鈰( reo99 . 99 % )及系列產品。
It is significant for reducing the product cost and improving the comprehensive property of the superabsorbent composite. using ammonium eerie nitrate and n, n ' - methylene - bis - acrylamide as an initiator and crosslink agent respectively, a superabsorbent composite is prepared by graft polymerization of acrylamide on starch at the presence of clay suspension, followed by hydrolyzing, washing, drying, grounding and filtering
本文以硝酸
鈰銨為引發劑, n , n -亞甲基雙丙烯酰胺為交聯劑,使澱粉、粘
土接枝共聚丙烯酰胺,經過水解,洗滌,乾燥,粉碎制得粘
土-澱粉接枝共聚丙烯酰胺的超吸水性復合材料。
Rare earth metals and their oxide - determination of cerium oxide content - fluorescent spectrophotometric method
熒光光度法測定稀
土氧化物中氧化
鈰量
Method for chemical analysis of rare earth chloride and carbonate - determination of cerium oxide content
氯化稀
土碳酸稀
土化學分析方法氧化
鈰量的測定
The widely used mg alloy zm5 is chose as the original alloy. on the surface of the molten alloy, a layer of protective film with dense structure is formed by the addition of la, ce or mischmetal. the film prevents the penetration of oxygen and volatilization of mg vapor, and then prevents the zm5 alloy from oxidation and burning
針對目前廣泛應用的zm5鎂合金,通過添加稀
土鑭、
鈰和混合稀
土,在鎂合金液面上形成一層結構緻密並且具有耐久性的保護膜,阻止氧氣的進一步侵入和鎂蒸氣的向外揮發,不再產生鎂的劇烈氧化燃燒現象。
Re cerium oxide polishing powder and the use of performance : ultrafine polishing powder particle size, particle size uniformity, suspended strong cutting edge polishing speed, glass high - yield, easily washable, glass processed products essential to the polishing material
信息描述:稀
土氧化
鈰拋光粉的用途及性能:拋光粉粒度超細,粒度均勻,懸浮性強,削力強,拋光速度快,玻璃成品率高,易清洗,是玻璃工藝品加工必不可少的拋光材料。
Pure re ( cerium, lanthanum ) have certain improvement effect on the conductivity of pure aluminum with relatively high impurity contents in some degree of addition, but had a slight effect on that with relatively low impurity content
單獨加稀
土鈰或鑭對雜質含量高的純鋁的導電性在一定的添加范圍內有一定的改善,而對雜質含量較低的純鋁的導電性略有改善。
Methods for chemical analysis of rare earth chloride and carbonate - determination of lanthanum oxide, cerium oxide, praseodymium oxide, neodymium oxide, samarium oxide, europium oxide and yttrium content
氯化稀
土碳酸稀
土化學分析方法氧化鑭氧化
鈰氧化鐠氧化釹氧化釤氧化銪和氧化釔量的測定
Rare earth metals and their oxide determination of cerium oxide content - fluorescent spectrophotometric method
稀
土金屬及其氧化物化學分析方法熒光光度法測定稀
土氧化物中氧化
鈰量
Determination of the cerium subgroup of rare earth elements content - tribromoarsenazo spectrophotometric method
三溴偶氮胂分光光度法測定
鈰組稀
土元素總量
Aluminium and aluminium alloys - determination of the cerium subgroup of rare earth elements content - tribromoarsenazo spectrophotometric method
鋁及鋁合金化學分析方法三溴偶氮胂分光光度法測定
鈰組稀
土元素總量
Methods for chemical analysis of aluminium alloys - part 14 : determination of the cerium subgroup of rare earth elements content by tribromoarsenazo spectrophtometric method
鋁合金化學分析方法第14部分:三溴偶氮胂光度法測定鈰組稀土總量