| 我国微米级无机多孔非金属矿及其应用 |
| |
| 引用本文： | 木士春.我国微米级无机多孔非金属矿及其应用[J].高校地质学报,2000,6(2):340-344. |
| |
| 作者姓名： | 木士春 |
| |
| 作者单位： | 中国科学院 长沙大地构造研究所，湖南 长沙 410013 |
| |
| 基金项目： | 湖南省中青年基金，湖南省科技发展计划，湘科计字1996-312-04，湘计科1998-750-14，， |
| |
| 摘 要： | 无机多孔非金属矿，按孔径及其应用特点可划分为纳米级(1～100nm )、微米级（0.1～100μm)及毫米级（0.1～1mm)等三种类型。微米级多孔非金属矿主要有硅藻土、轻质蛋白石、多孔凝灰岩、多孔硅质岩等，大都分布于地台活化区内，为后地台稳定条件下形成。它们的物相主要为蛋白石、微晶石英或流纹质玻屑等；化学成分上具有高硅、低铝铁等特征；孔隙结构除具有孔径相似、孔形态丰富、孔隙率大、堆密度小及多开孔等相似性外，在微米级孔径范围内（0.1～100μm），孔隙的大小、形状及抗压强度等方面也具有相异性。因此它们具有与纳米级和毫米级多孔非金属矿不同的应用领域。
|
| 关 键 词： | 微米级 无机多孔非金属矿 非金属矿物 硅藻土 |
| 收稿时间： | 2000-06-20 |
| 修稿时间： | 1999-12-09 |
Micron Sized Inorganic Porous Non-metallic Ores in China and Their Applications |
| |
| MU Shi-chun.Micron Sized Inorganic Porous Non-metallic Ores in China and Their Applications[J].Geological Journal of China Universities,2000,6(2):340-344. |
| |
| Authors: | MU Shi-chun |
| |
| Institution: | Changsha Institute of Geotectonics, Academic Sinica, Changsha, 410013, China |
| |
| Abstract: | Inorganic porous non-metallic ores can be grouped i nto three types according to the size of pore diameter and their applications: n anometer sized (1～100nm), micron sized (0.1～100μm) and millimeter sized (0.1 ～1.0mm). Among them, micron sized porous non-metallic ores chiefly include dia tomaceouse earth, light-weighted opal, porous tuff and siliceous rock etc. Mos t of them occur in activated regions of platform as the results of post-platfor m mineralization at a stable stage.
The principal mineral phase of micron sized porous non-metallic ores is opal, microquartz crystals and rhyolitic glass. The porous siliceous rock mainly consi sts of microquartz crystals and has a high degree of hardness and stability.The opal as a major mineral phase of diatomaceouse earth and light-weighted opal, a nd the rhyolitic glass as a major mineral phase of the porous tuff, are usually unstable. They are very easily to undergo crystallization in nature.
Chemically, the micron sized porous non-metallic ores have the features of higher silicon and lower aluminium, iron etc.. Among them the porous siliceous r ock has the highest contents of SiO2 ( >92%), the diatomaceouse earth and lig ht-weighted opal--less (<92%), and the porous tuff--the lowest(<70%). This is one of the most effective markers to identify porous siliceous rock and diato maceouse earth.
There are similar and different aspects in pore features of micron sized porou s non-metallic ores. Their similarities are high porosity, low cumulus density and frequent open-pores; Their differences are mainly expressed in size, shape and compression strength of the pores.
The micron sized porous non-metallic ores have strong adsorbability and heat p reservation capacity and can be used as the adsorbents， catalysts, carriers, fi llings and thermal insulation materials. Because of their remarkable functio n in removing particles in filtration and separation, they are the best raw mate rials in making filter aids. Presently, most of micron sized porous non-metal lic ores as potential non-metallic mineral resources have been gradually utiliz ed in the fields of building materials, chemical engineering, agriculture, food and environmental protection etc. |
| |
| Keywords: | inorganic porous non-metallic ores non-metallic mine ral materials diatomaceous earth light-weighted opal porous tuff porous sil iceous rock |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《高校地质学报》浏览原始摘要信息 |
| 点击此处可从《高校地质学报》下载免费的PDF全文 |
|
