A study for preparing neodymium oxide from waste Nd-Fe-B materials was conducted by adopting acid solving-composite salt precipitation process.
利用稀土烧结钕铁硼永磁材料的废料作为原料，选用酸溶-复盐沉淀的化学法，进行了制取氧化钕的实验研究。
During the initial stage of oxidation, Cr decreased Fe content in the oxide scale, by which the selective oxidation of Al was promoted.
铬降低了氧化膜内的铁含量，提高了初期氧化膜的保护性，从而促进选择性氧化铝膜的形成。
To extract zinc from high si and Fe zinc oxide ore, a new process consisting of low acid leaching, iron removal and desilication was developed for zinc extraction.
为了从高含硅、含铁等的氧化锌矿中提取锌，设计了低酸浸出、针铁矿除铁并脱硅提锌的新工艺。
The X-diffraction analysis of fly ash showed that iron minerals were mainly hematite and magnetite, small amount of magnetic hematite, Mg-Fe spinel and Mg-Fe-Al oxide solid solution.
经x -衍射分析粉煤灰中的含铁矿物主要是以赤铁矿和磁铁矿的状态存在，少量以磁赤铁矿、镁铁尖晶石以及镁铝铁氧化物的固熔体形式存在。
The TPD results of adsorbed propylene on Fe-Sb oxide catalyst have been compared with those on Mo-type oxide catalyst (C-41). It is believed tha…
比较了铁锑和钼系（C-41）两种氧化物催化剂上吸附丙烯后的程脱结果，并提出了丙烯在铁锑氧化物催化剂上的氧化机理。
The heavy metals adsorption capacity varied with types of Mn oxide minerals in the Fe Mn nodules.
结核中所含锰矿物类型不同，对重金属离子吸附的能力不一样。
The heavy metals adsorption capacity varied with types of Mn oxide minerals in the Fe Mn nodules.
结核中所含锰矿物类型不同，对重金属离子吸附的能力不一样。
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