A preliminary rheological classification of phyllosilicate group minerals

With the increased exposure to progressively complex ores, there is growing concern over the effects of phyllosilicate gangue minerals. These minerals present challenges during ore beneficiation, with issues such as reduced flotation performance and complex tailings treatment arising. Often broadly classified as ‘clays’, the understanding of the distinct behaviour of phyllosilicates remains poor. This work focusses on talc, illite and kaolinite, and forms part of an ongoing study which aims at investigating the entire phyllosilicate group, categorised as serpentine, micas; talc/pyrophillite, kaolinites, illites, smectites and vermiculite. Using pure minerals belonging to each phyllosilicate type, a comprehensive surface charge and rheological analysis was conducted, incorporating their charge anisotropy and non-spherical morphology. The mineralogy was discussed, based on pre-existing knowledge of the minerals. Talc, kaolinite and illite suspensions are characterised by high yield stresses and low viscosities, with differences in their behaviour attributed to variations in charge anisotropy, aspect ratio and surface morphology. A comparison with other phyllosilicates showed that muscovite (mica) results in the least rheologically complex suspensions, while the fibrous nature of chrysotile (serpentine) leads to suspensions with the highest yield stresses and viscosities. The other minerals demonstrate intermediate rheological behaviour. Such a classification may be foundational to geometallurgical advances which can enable process performance predictions based on mineralogy.     

伊利石矿粉的改性及其在橡胶中的应用

本文应用硅烷偶联剂对福建省闽南地区伊利石类粘土矿物进行改性处理，探索粘土表面活性，改性温度，时间等因素对改性效果的影响，以及应用带有各种不同有机官能团的偶联剂对伊利石矿粉进行表面改性，制备出适于天然橡胶，合成橡胶、室温硫化硅橡胶及高温硫化硅橡胶应用的各种改性土，对橡胶补强性能达到应用要求。     

Thermal activation and alkali dissolution of silicon from illite

TGA, DTA, FTIR, XRD and 29Si MAS NMR were used to investigate the thermal activation of illite. Illite experiences a series of thermal solid-state phase transformations. Dehydroxylation at 400700 °C forms dehydrated illite, which remains the layered framework of illite. From 700 °C to 1093 °C, Si–O tetrahedral framework remains unchanged. When heated above 1093 °C, the layered structure is destroyed and an amorphous silica-rich glass phase is formed. The mullitization occurs when the temperature exceeds 1100 °C.XRD and FTIR studies show that the silica in silica-rich glass phase dissolves in soda liquor, which indicates that silicon can be removed from illite after thermochemical activation (TCA) followed by alkali leaching. The formation of sodium aluminosilicates of Na₉₆Al₉₆Si₉₆O₃₈₄ and 0.95Na₂O · Al₂O₃ · 3.25SiO₂ · 4.79H₂O during alkali leaching may reduce the desilication to a great extent.Desilication tests after TCA show that the suitable activation conditions for illite are 11001150°C and 9060 min. A desilication of 45% was obtained under the conditions for an ore sample bearing about 85% illite, 9% quartz and 5% muscovite.     

EAA对PP/POE/伊利石体系的反应增容作用

研究了乙烯—丙烯酸共聚物(EAA)作为增容剂对聚丙烯(PP)／乙烯—辛烯共聚物(POE)／伊利石三元共混体系力学性能的影响，并通过SEM及DSG对其形态和结构进行了分析。结果表明，EAA的加入有效地改善了填料与基体之间的界面粘合，促进了填料在基体中的有效分散，体系的力学性能明显提高；对共混体系结品行为的研究表明，增容剂EAA包覆在伊利石表面，抑制了伊利石对聚丙烯的成核作用，阻碍了聚丙烯基体的结晶；同时，还比较了两种制备三元共混体系的方法，结果表明，填充母料法制备的三元共混体系的力学性能忧于直接加料法制备的三元共混体系的力学性能。     

伊利石的综合利用

介绍了伊利石通过酸浸取达到综合利用的工艺流程、原料及产品规格、项目投资情况,并对今后工艺的改进提出了建议。     

黏土矿物对不同类型烃源岩热解参数影响

选取高岭石、伊利石和绿泥石3种黏土矿物,以不同比例分别与Ⅰ型、Ⅱ型和Ⅲ型干酪根混合并进行热解实验,探讨黏土矿物种类及含量对不同类型烃源岩热解参数影响.实验结果表明,黏土矿物对干酪根热解生烃作用同时具有层间吸附作用和表面吸附作用,黏土矿物的表面吸附作用会增大矿物的催化能力,层间吸附会造成大分子烃类被吸附在层间沉淀,抑制热...     

准噶尔盆地马桥凸起侏罗系油气成藏期次

综合各种油气成藏期次的分析方法,研究了准噶尔盆地马桥凸起侏罗系的油气成藏期次。认为中侏罗统头屯河组和西山窑级油藏主体在中晚侏罗世形成;下侏罗统三工河组和八道湾组混合油气藏具有多期成藏的特点,最初进入储集层的石油在中晚侏罗世,后期注入储集层的高成熟石油主要在晚白垩世,最后天然气成藏主要在早第三纪。同时认为,流体包裹体均一化温度与自生伊利石同位素年龄不一定都能记录油气成藏最早时间。     

黏土结构对聚氯乙烯/黏土复合材料性能的影响

用两种不同结构的黏土伊利石和海泡石作为填料填充到聚氯乙烯(PVC)树脂中,研究黏土结构对PVC性能的影响。结果表明:黏土的结构不同,对PVC的性能影响也存在明显差异。伊利石对提高PVC的拉伸强度优于海泡石;而海泡石对提高PVC的冲击强度优于伊利石。伊利石提高了PVC的弯曲强度,对弯曲模量的影响不大;而海泡石降低了PVC的弯曲强度,但明显加大了PVC的弯曲模量。海泡石对提高PVC的热变形温度优于伊利石。     

伊利石的机械力化学改性研究

本文对选矿提纯伊利石进行了机械力化学改性研究。研究表明：伊利石经过改性后，其疏水性能得到了明显提高，其在水中的沉降速度由原来的0．4ml／min提高到3．0ml／min。