Synthesis of High Functional Macro-molecule Clay Materials from Iron Slag

铁渣合成高功能高分子粘土材料

• 批准号: 11650963
• 负责人: YAMAZAKI Atsushi
• 金额: $ 2.43万
• 依托单位: Waseda University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650963/
• 关键词: Iron slags; Allophene; Imogolite; Macromolecule clay minerals; Hydrothermal synthesis; マクロモレキュル粘土鉱物; DSC; 重金属イオン置換; 熱分析

Synthesis process of high functional macro-molecule material from water quenched blast furnace iron slag was investigated. Calcium, containing in an iron slag as a major element, is a one of powerful inhibitor to produce aluminosilicate macromolecules of allophone and imogolite. As a starting material, a pure silica gel was prepared from the slag pretreated by dropping concentrated hydrochloric acid at room temperature. A sodium silicate solution which prepared from the silica gel, sodium hydroxide and aluminum nitrate solutions were mixed with vigorous stirring, then dilute ammonium solution was added to produce an aluminum orthosilicate gel. Allophone-imogolite series macro-molecule clay minerals with various Si/Al ratios were obtained by treated the aluminum orthosilicate gel solution hydrothermally. The biggest imogolite crystal shows fine fiber form over 10 μm in length. In the case of slag with smaller calcium content, it was also found that allophone-imogolite series products could be obtained by short process of hydrothermal treatment from sodium silicate gel which obtained from the slag powder pretreated with sodium hydroxide solution. Molecular sieves and adsorption properties could be controlled by the crystal structure, Si/Al ratio, crystallinity and morphological properties of macromolecule clay products. Reports about these results have been prepared now.

研究了以水淬高炉铁渣为原料合成高功能高分子材料的工艺。铁渣中以钙为主要元素，是生成异音素和铁长石等铝硅酸盐大分子的有效抑制剂之一。以室温下滴加浓盐酸预处理的炉渣为原料，制备了纯硅胶。将硅胶、氢氧化钠和硝酸铝溶液配制成水玻璃溶液，剧烈搅拌后加入稀铵溶液制得正硅酸铝凝胶。对正硅酸铝凝胶溶液进行水热处理，得到了不同硅铝比的异丙烯-伊莫长石系列大分子粘土矿物。最大的铁长石晶体长度超过10 μm，呈细纤维形态。在含钙量较低的矿渣中，用氢氧化钠溶液预处理矿渣粉后得到水玻璃凝胶，经短工艺水热处理可制得异丙烯-伊莫戈尔石系列产品。高分子粘土制品的晶体结构、硅铝比、结晶度和形态特性可以控制分子筛和吸附性能。现在已经编写了关于这些结果的报告。