检索结果-南通市图书馆

Migration behaviors and kinetics of phosphorus during coal-based reduction of high-phosphorus oolitic iron ore

International Journal of Minerals,Metallurgy and Materials 2019年第8期26卷 938-945页

作者： Yong-sheng Sun Yan-feng Li Yue-xin Han Yan-jun Li School of Resources and Civil Engineering Northeastern University

To understand the migration mechanisms of phosphorus(P)during coal-based reduction,a high-phosphorus oolitic iron ore was reduced by coal under various experimental *** migration characteristics and kinetics of P were investigated by a field-emission electron probe microanalyzer(FE-EPMA)and using the basic principle of solid phase mass transfer,*** results showed that the P transferred from the slag to the metallic phase during reduction,and the migration process could be divided into three stages:phosphorus diffusing from the slag to the metallic interface,the formation of Fe P compounds at the slag metal interface and P diffusing from the slag metal interface to the metallic *** reduction time and temperature significantly influenced the phosphorus content of the metallic and slag *** P content of the metallic phase increased with increasing reduction time and temperature,while that of the slag phase gradually *** P diffusion constant and activation energy were determined and a migration kinetics model of P in coal-based reduction was proposed.P diffusion in the metallic phase was the controlling step of the P migration.

关键词： high-phosphorus oolitic iron ore coal-based reduction phosphorus migration kinetics

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Strengthening iron enrichment and dephosphorization of high-phosphorus oolitic hematite using high-temperature pretreatment

引用

International Journal of Minerals,Metallurgy and Materials 2020年第4期27卷 443-453页

作者： Wen-tao Zhou Yue-xin Han Yong-sheng Sun Yan-jun Li College of Resources and Civil Engineering Northeastern UniversityShenyang 110819China

The efficient development and utilization of high-phosphorus oolitic hematite is of great strategic significance for the sustainable supply of iron-ore resources in *** this paper,the mechanism of high-temperature pretreatment for enhancing the effect of iron enrichment and dephosphorization in the magnetization roasting–leaching process was studied by X-ray diffraction(XRD),vibration sample magnetometer(VSM),scanning electron microscopy and energy dispersive spectrometry(SEM–EDS).Compared with the process without high-temperature pretreatment,the iron grade of the magnetic separation concentrate after high-temperature pretreatment had increased by 0.98%,iron recovery rate had increased by 1.33%,and the phosphorus content in the leached residue had decreased by 0.12%.high-temperature pretreatment resulted in the dehydration and decomposition of hydroxyapatite,the dehydration of limonite and the thermal decomposition of siderite,which can produce pores and cracks and weaken the compactness of the ore,improve the magnetization characteristics of roasted ore,and strengthen the iron enrichment and dephosphorization during the magnetization roasting and leaching process.

关键词： high-phosphorus oolitic hematite high-temperature pretreatment iron enrichment and dephosphorization magnetization roasting–leaching process phase transformation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Inorganic phosphate in the development and treatment of cancer:A Janus Bifrons?

引用

World Journal of Clinical Oncology 2015年第6期6卷 198-201页

作者： Luigi Sapio Silvio Naviglio Department of Biochemistry Biophysics and General PathologyMedical SchoolSecond University of Naples

Inorganic phosphate(Pi) is an essential nutrient to living organisms. It is required as a component of the energy metabolism,kinase/phosphatase signaling and in the formation and function of lipids,carbohydrates and nucleic acids and,at systemic level,it plays a key role for normal skeletal and dentin mineralization. Pi represents an abundant dietary element and its intestinal absorption is efficient,minimally regulated and typically extends to approximately 70%. Maintenance of proper Pi homeostasis is a critical event and serum Pi level is maintained within a narrow range through an elaborate network of humoral interactions and feedback loops involving intestine,kidney,parathyroid gland and bone,and depends on the activity of a number of hormones,including parathyroid hormone,1,25-dihydroxy vitamin D,and fibroblast growth factor 23 as major regulators of Pi homeostasis. Notably,Pi intake seemingly continues to increase as a consequence of chronic high-phosphorus(P) diets deriving from the growing consumption of highly processed foods,especially restaurant meals,fast foods,and convenience foods. Several recent reports have generated significant associations between high-P intake or high-serum Pi concentration and morbidity and mortality. Many chronic diseases,including cardiovascular diseases,obesity and even cancer have been proposed to be associated with high-P intakes and high-serum Pi concentrations. On the other hand,there is also evidence that Pi can have antiproliferative effects on some cancer cell types,depending on cell status and genetic background and achieve additive cytotoxic effects when combined with doxorubicin,illustrating its potential for clinical applications and suggesting that up-regulating Pi levels at local sites for brief times,might contribute to the development of novel and cheap modalities for therapeutic intervention in some tumours. Overall,the influence of Pi on cell function and the possible relationship to cancer have to be fully un

关键词： Calcium-phosphate nanoparticles Inorganic phosphate Cancer high-phosphorus diets phosphorus intake Doxorubicin Combination therapy Naturally occurring molecule Osteosarcoma

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：