Reducing na2o and k2o contents in baotou iron concentrate by flotation 鈉含量的浮選試驗(yàn)研究
Ab initio study of structures for li2o , li2s , na2o , na2s molecules 堿金屬氧化物和硫化物分子結(jié)構(gòu)的從頭算研究
Na2o solid fuels - determination of chemical composition of fuel ash - part 8 : determination of soda and potash nao , ko contents 固體燃料.燃料灰化學(xué)成分測(cè)定.第8部分:氧化鈉
Determinations of fe2o3 , cao , mgo , na2o and k2o in alundum powder by atomic absorption spectrophotometry 剛玉粉中三氧化二鐵氧化鈣氧化鎂氧化鈉氧化鉀的原子吸收分光光度測(cè)定法
6 . the density , chemical durability in water , and stability against crystallization of glasses in the na2o - teo2 system are explored and the fragility of glass forming liquid is studied 研究了nazo一teo :系統(tǒng)中不同成分對(duì)玻璃密度,化學(xué)穩(wěn)定性,玻璃的抗析晶能力,以及玻璃形成液體的脆性等性能的影響。
Na2o - 8teo2 crystal is stable at temperatures below 330 and will decomposed into two crystalline phase including na2o4teo2 and teo2 at 340 or a higher temperature . the phase diagram of sodium tellurite is modified according to the results obtained . the transformation of na2o - 8teo2 into na2o4teo2 and teo2 includes two steps : na2o - 8teo2 is first transformed into an intermediate amorphous phase and then the intermediate amorphous phase crystallizes to form na2o - 4teo2 and teo2 - the intermediate amorphous phase formed during the transformation is amorphous powder 通過(guò)對(duì)nt _ 8晶相向nt _ 4和teo _ 2晶相的轉(zhuǎn)變過(guò)程的研究發(fā)現(xiàn),由nt _ 8晶相向nt _ 4和teo _ 2晶相的轉(zhuǎn)變包括兩個(gè)轉(zhuǎn)變過(guò)程,即由nt _ 8晶相向非晶中間相轉(zhuǎn)變的過(guò)程和由非晶中間相向nt _ 4和teo _ 2晶相轉(zhuǎn)變的過(guò)程,在轉(zhuǎn)變過(guò)程中出現(xiàn)的非晶中間相是一種非晶固態(tài)粉末。
This process was propitious to enrich , activate , transport the copper . in different alteration granodiorite porphyry , sio2 , k2o , cu , mo are depleted in the fresh and weakly altered rock , and are enriched in the strongly altered rock , cl is also enriched in the strongly altered rock . but na2o and fe are extracted from the porphyry into the ore - forming fluid , especially the presence of fe is in favor of cu deposition 在銅廠巖體不同的蝕變帶中, sio _ 2 、 k _ 2o 、 cu 、 mo等從新鮮斑巖甚至弱蝕變帶中帶出,而在強(qiáng)蝕變帶強(qiáng)烈富集, cl同樣有在強(qiáng)蝕變巖石中富集的趨勢(shì);而na _ 2o 、 fe從斑巖體中帶出,進(jìn)入流體相中,流體中大量fe的存在,有利于銅的沉淀、富集成礦。
Results show that both the density and the chemical durability of glasses decrease with the increase of na2o content . on the other hand , the stability against crystallization of glasses increases gradually with the increase of na2o content . glasses containing 20 ~ 25mol % na2o have the strongest stability against crystallization . the glass forming liquid in the na2o - teo2 system is moderate fragile and the fragility of glass forming liquid increases with t 該系統(tǒng)玻璃的抗析晶能力和玻璃形成能力與試樣的成分有很大關(guān)系,隨著成分中氧化鈉含量的升高,玻璃的抗析晶能力和玻璃形成能力則逐漸升高,當(dāng)氧化鈉含量在20一25mol %之間時(shí),玻璃的抗析晶能力和玻璃形成能力最強(qiáng)。