The boron mud is solid waste from a borax factory in Liaoning province, China. The main chemical compositions of the boron mud powder are MgO 43.36%, SiO2 25.99%, Fe2O3 5.55% (shown in Table 1), and its mineral phases...The boron mud is solid waste from a borax factory in Liaoning province, China. The main chemical compositions of the boron mud powder are MgO 43.36%, SiO2 25.99%, Fe2O3 5.55% (shown in Table 1), and its mineral phases are mainly forsterite, magnesite and phlogopite.展开更多
The potassium-feldspar can be decomposed using the KOH as additive via hydrothermal synthesis methods, which can destroy the structure of the potassium-feldspar and turns its K+ into water soluble potash resources and...The potassium-feldspar can be decomposed using the KOH as additive via hydrothermal synthesis methods, which can destroy the structure of the potassium-feldspar and turns its K+ into water soluble potash resources and make its silica component utilized. The potassium-feldspar from Inner Mogolia was decomposed after iron removing and hydrothermal processes successively. The results showed(Table 1) that the iron could be removed up to 98.56% after the treatment of 90℃ for 2 hours with 5.8mol/L density of HCL solution. It is seen from the Table 1that the content of iron significantly decreased while the content of SiO2, Al2O3, K2O increase. The treated sample was used to be decomposed by hydrothermal method in KOH solution. The results showed that the dissolution rate of SiO2 could be up to 64.73% after the hydrothermal treatment of 260 ℃ for 2 hours with 1.2 mol/L density of KOH(Fig 1). The solid product is mailnly kalsilite phase.展开更多
Nepheline syenite is an important potassium-rich rock resource. Nepheline syenite powder was decomposed successfully by hydrothermal reaction using NaOH additive. Hydroxycancrinite (Na8(Al6Si6O24)(OH)2·2H2O ) sol...Nepheline syenite is an important potassium-rich rock resource. Nepheline syenite powder was decomposed successfully by hydrothermal reaction using NaOH additive. Hydroxycancrinite (Na8(Al6Si6O24)(OH)2·2H2O ) solid and (K,Na)2SiO3 solution was obtained as a result of the hydrothermal reaction.展开更多
The decomposition of K-Feldspar is significant to the development and utilization of K-feldspar as potassium resources. Potassium feldspar powder was decomposed successfully by hydrothermal method using CaO additive. ...The decomposition of K-Feldspar is significant to the development and utilization of K-feldspar as potassium resources. Potassium feldspar powder was decomposed successfully by hydrothermal method using CaO additive. Tobermorite solid and KOH solution were obtained as a result of the hydrothermal decomposition.展开更多
[目的]了解2000年—2019年国内外达标理论研究现状。[方法]检索中国知网、万方数据知识服务平台、维普数据库、Web of Science、PubMed中关于达标理论的文献,采用文献计量学、社会网络化分析等方法对纳入的文献进行多维度的分析。[结果...[目的]了解2000年—2019年国内外达标理论研究现状。[方法]检索中国知网、万方数据知识服务平台、维普数据库、Web of Science、PubMed中关于达标理论的文献,采用文献计量学、社会网络化分析等方法对纳入的文献进行多维度的分析。[结果]共纳入达标理论相关文献246篇,包括中文文献183篇,英文文献63篇。达标理论研究数量逐步上升,但基金支持较少,作者合作较少,地区分布与机构分布不均,实践性研究多于理论性研究,文献质量还有待提高。[结论]达标理论研究具有一定发展,但仍然存在许多不足,我国研究者应借鉴国外研究经验,革新理论并紧密结合实际,进一步提高国内护理论文质量。展开更多
文摘The boron mud is solid waste from a borax factory in Liaoning province, China. The main chemical compositions of the boron mud powder are MgO 43.36%, SiO2 25.99%, Fe2O3 5.55% (shown in Table 1), and its mineral phases are mainly forsterite, magnesite and phlogopite.
基金Project supported by National Key Technologies Research and Development Program for 11th Five-year Plan(No. 2006BAD10B04)China Geological Survey Project(No. 12120113087700)
文摘The potassium-feldspar can be decomposed using the KOH as additive via hydrothermal synthesis methods, which can destroy the structure of the potassium-feldspar and turns its K+ into water soluble potash resources and make its silica component utilized. The potassium-feldspar from Inner Mogolia was decomposed after iron removing and hydrothermal processes successively. The results showed(Table 1) that the iron could be removed up to 98.56% after the treatment of 90℃ for 2 hours with 5.8mol/L density of HCL solution. It is seen from the Table 1that the content of iron significantly decreased while the content of SiO2, Al2O3, K2O increase. The treated sample was used to be decomposed by hydrothermal method in KOH solution. The results showed that the dissolution rate of SiO2 could be up to 64.73% after the hydrothermal treatment of 260 ℃ for 2 hours with 1.2 mol/L density of KOH(Fig 1). The solid product is mailnly kalsilite phase.
基金Project supported by National Key Technologies Research and Development Program for 11th Five-year Plan (No. 2006 BAD10B04)China Geological Survey Project (No. 12120113087700)
文摘Nepheline syenite is an important potassium-rich rock resource. Nepheline syenite powder was decomposed successfully by hydrothermal reaction using NaOH additive. Hydroxycancrinite (Na8(Al6Si6O24)(OH)2·2H2O ) solid and (K,Na)2SiO3 solution was obtained as a result of the hydrothermal reaction.
基金Project supported by National Key Technologies Research and Development Program for 11th Five-year Plan (No. 2006 BAD10B04)China Geological Survey Project (No. 12120113087700)
文摘The decomposition of K-Feldspar is significant to the development and utilization of K-feldspar as potassium resources. Potassium feldspar powder was decomposed successfully by hydrothermal method using CaO additive. Tobermorite solid and KOH solution were obtained as a result of the hydrothermal decomposition.
文摘[目的]了解2000年—2019年国内外达标理论研究现状。[方法]检索中国知网、万方数据知识服务平台、维普数据库、Web of Science、PubMed中关于达标理论的文献,采用文献计量学、社会网络化分析等方法对纳入的文献进行多维度的分析。[结果]共纳入达标理论相关文献246篇,包括中文文献183篇,英文文献63篇。达标理论研究数量逐步上升,但基金支持较少,作者合作较少,地区分布与机构分布不均,实践性研究多于理论性研究,文献质量还有待提高。[结论]达标理论研究具有一定发展,但仍然存在许多不足,我国研究者应借鉴国外研究经验,革新理论并紧密结合实际,进一步提高国内护理论文质量。
