Dissolution Behavior of Nutrient Elements from Fertilizer Made of Steelmaking Slag, in an Irrigated Paddy Field Environment
Dissolution Behavior of Nutrient Elements from Fertilizer Made of Steelmaking Slag, in an Irrigated Paddy Field Environment
复制标题
水田环境下炼钢渣肥料营养元素的溶出行为
DOI：
10.1007/s40831-015-0030-8
复制
发表时间：
2015
影响因子：
2.4
通讯作者：
S. Kitamura
中科院分区：
文献类型：
--
作者：
Xu Gao;N. Maruoka;Sun;S. Ueda,;S. Kitamura
用炼钢炉渣生产肥料时，矿物相的组合不仅要适合高温精炼，而且要适合在稻田中补充营养元素。本研究首先考察了不同牌号钢渣化肥的化学成分和矿物结构的差异。肥料的碱度(CaO/SiO_2)、游离CaO含量、全铁含量和Fe2+/Fe3+比值因品牌而有很大差异。此外，在矿物相方面，还观察到了由2CaO·SiO_2和3CaO·P_2O_5、MgO-FeO、CaO-Fe_2O_3、游离CaO、金属Fe组成的固溶体，以及在精炼温度下含有液态的另一种固溶体。每一阶段的质量分数也因品牌而异。其次，研究了化肥中各矿物相在模拟早期水淹条件下的溶解行为。在钙的溶解方面，游离CaO在短时间内溶解，2CaO·SiO_2和3CaO·P_2O_5固溶体溶解缓慢。除CaO-SiO_2-FeO组成的矿物相外，Fe几乎不溶于任何矿物相。铁的溶解与其他相的质量分数以及铁氧化物中Fe2+/Fe3+的比值有明显的关系。
To produce fertilizer made of steelmaking slag, the combination of mineralogical phases is necessary to be appropriate not only for refining at high temperature, but also for supplementing nutrient elements in paddy fields. In this research, first, the variations in the chemical composition and mineralogical structure of various brands of fertilizer made of steelmaking slag were investigated. The basicity (CaO/SiO2), free-CaO content, total Fe content, and Fe2+/Fe3+ratio of fertilizer were found to vary widely depending on the brand. In addition, regarding the mineralogical phases, solid solution consisting of 2CaO·SiO2and 3CaO·P2O5, MgO–FeO, CaO–Fe2O3, free CaO, metallic Fe, and the other phase which included liquid phases at refining temperature were observed. The mass fraction of each phase also varied depending on the brand. Second, the dissolution behavior of each mineralogical phase in the fertilizers into water that simulated the early stage of flooding condition was studied. Regarding the dissolution of Ca, free CaO dissolved in a short time, and the solid solution of 2CaO·SiO2and 3CaO·P2O5dissolved slowly. Fe barely dissolved from any mineralogical phase except the other phase which consisted of CaO–SiO2–FeO. A clear relationship was observed between the dissolution of Fe and the mass fraction of other phase as well as the ratio of Fe2+to Fe3+in Fe oxides in fertilizer made of steelmaking slag.
如何接受自主学习
DOI：
--
发表时间：
2016
期刊：
AJELC創立10周年記念随想集～言語・文化・教育に思いを寄せる～
影响因子：
--
作者：
高橋朋子;東郷多津。西之園晴夫;神月紀輔;神月紀輔;東郷多津
通讯作者：
東郷多津