生物浸矿反应器的制作及矿浆质量分数分布特征

以自制的生物浸矿反应器为对象,以反应器内矿浆质量分数分布为评价指标,就搅拌器搅拌方式、外循环流量及曝气大小对矿浆质量分数的分布进行了研究.结果表明:当搅拌速度为1800～2000 r/min,搅拌桨离曝气器顶部2～3 cm,外部循环流量为13 L/min,曝气量为1.2 m3/h时,反应器内矿浆质量分数分布均匀.并对总矿浆质量分数为6 %、10 %、15%和20%的反应器内矿浆质量分数随反应器高度的变化进行了研究.     

累托石纳米晶层的高压剥离研究

首次采用物理方法高压制备了酚醛树脂(PF)/累托石(REC)粘土和酚醛树脂(PF)/有机改性累托石(OREC)粘土纳米复合材料,以X射线衍射(XRD)、透射电子显微镜(TEM)及红外光谱(IR)分析了复合材料的物相和显微结构。结果表明,不通过层间高分子聚合反应,在常温高压下,由聚合物分子插入粘土层间,可以形成剥离型树脂/粘土纳米复合材料。在100M Pa和500M Pa下,复合材料中的OREC完全剥离,而REC只有部分被剥离。     

超声波强化酸浸高磷铁矿石除磷试验研究

针对某焙烧-磁选后的高磷铁精矿(铁品位54.92%,磷含量0.83%),采用超声波强化硫酸浸出其中的磷。试验结果表明:随着超声时间的延长,除磷率逐渐降低,当超声时间为60min时,矿石的铁品位有一定波动,但比原来都有一定程度的提高,可达到58%以上,而铁回收率会随着超声时间的延长呈下降趋势,但都在92%以上;随着矿浆浓度的增加,浸出后矿石中的磷含量也逐渐增加,当矿浆浓度低于6%时,超声波除磷效果显著,固体中磷含量都低于0.24%;铁品位呈下降的趋势,但相对铁精矿都有一定程度的提高,而铁回收率也呈波动增加趋势,从最低的91.89%上升至95.50%。     

氧化亚铁硫杆菌的分离培养及其浸磷效果

从安徽某煤矿的酸性矿坑水中分离出能有效浸出低品位磷矿的氧化亚铁硫杆菌菌株,对其形态特征和生长特性进行了初步的研究,并通过研究不同固体培养基成分对氧化亚铁硫杆菌分离纯化的影响,确定了适宜的分离条件：9K固体培养基的Fe2+浓度为4.5 g/L,采用下层涂布异养菌(红酵母菌)、上层涂布氧化亚铁硫杆菌的双层平板. 考察了培养基、能源物质及表面活性剂等因素对所选育的氧化亚铁硫杆菌的浸磷效果的影响,通过初步实验,浸磷率可达48%.     

矿物分离用微生物及其培养条件实验设计

目前见诸报道的用于矿物分离的微生物有很多,本文总结了当前国内外矿物分离用微生物种类、作用于矿物的方式、应用等.鉴于矿物分离用微生物的培养成本较高及微生物的分离活性还有待提高,并且培养条件优化实验对实验设计要求很高,本文介绍了几种较好的实验设计方法并对其优缺点进行了比较.最后,本文介绍了微生物鉴定的方法及基本步骤.     

几种非金属矿物在建筑涂料改性中的应用

介绍了几种非金属矿——膨润土、硅藻土、高岭土以及累托石的基本性能及其在建筑涂料中的应用。     

PURIFICATION OF KAOLINS BY SELECTIVE DISPERSION AND FLOCCULATION

To fulfill the increasingly higher requirements on thequality of kaolins from industries, the purification of kaolins has becomemore and more important. Kaolins from different mines were studied withthe aim to remove the various impurities. The mineralogical studies on thekaolins indicated that kaolinite and the major gangue minerals in the orewere all very fine. Therefore, it was difficult to separate kaolinite fromthe gangue minerals by conventional mineral processing techniques,such asgravity concentration, magnetic separation and flotation. Techniques forfine particles processing, i. e. selective dispersion and flocculation weretried to purify the kaolins. The experiments were first carried out withpure minerals of kaolinite and the gangue,minerals to study the dispersionand flocculation characteristics of the different mineral suspensions undervarious conditions. The key factors affecting the dispersion and floccula-tion of the minerals in water were the pH of the suspension, the type anddosage of t     

高岭土剪切絮凝除铁机理的研究

本文对高岭石、赤铁矿－油酸钠体系的物理化学行为进行了研究，借助矿物表面电性及红外光谱的研究结果，通过计算固体微粒间的各种相互作用势能对高岭土剪切絮凝除投机理进行了探讨。     

Fourier Transform Infrared Spectroscopic Study of Sodium Phosphate Solids and Solutions

Solids and solutions of sodium phosphates with various chain lengths have been studied by using the techniques of diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy and attenuated total reflection- Fourier transform infrared ( ATR- FTIR ) spectroscopy, respectively. A systematic study of the infrared spectra of the solid sodium phosphates has been conducted on the basis of the information available in the literatures to establish the assignments of the infrared vibrations of the different groups in the phosphate molecules . The infrared spectra of the solutions of sodium phosphates have been analyzed according to the infrared study on the relevant solids , in conjunction with the study of the phosphate species distribution in solution on the basis of the acid- base reaction equilibria. The results obtained have revealed the correlations between the infrared absorption spectra and the structure of the different P-O groups in different hinds of phosphates and are useful in the analysis of phos     

矿物负载纳米TiO2光催化材料的制备及其在偶氮染料废水处理中的应用

选用累托石、高岭土为载体,采用溶胶-凝胶法制备了矿物负载纳米TiO2光催化材料.对制备的材料进行X衍射分析,表明TiO2已成功负载于矿物表面.其中TiO2有部分进入累托石层间.用制备的光催化材料处理含偶氮染料废水,结果表明其对偶氮染料废水的脱色率分别达到了100%和84.65%.通过对比实验、红外光谱分析以及紫外-可见光扫描分析结果表明光催化材料使偶氮染料发生了降解.