Characteristics of cationic Red X-GRL adsorption by diatomite tailings

As secondary mineral resources, diatomite tailings(DT) got from the Linjiang region of China were prepared and characterized by SEM, XRF and XRD. Mono-factor experiments were carried out to investigate the effects of the operation factor, including contact time, adsorbent concentration, initial p H value of the dye solutions, adsorption temperature and initial concentration of cationic Red X-GRL(X-GRL) on the adsorption of X-GRL. The adsorption kinetics, isotherms, thermodynamics and mechanisms for X-GRL were also studied. It was efficient for DT to adsorb X-GRL from aqueous solutions, and it was even discovered to have higher adsorptivity for X-GRL than diatomite concentrate(DC) in our previous test. The adsorption processes fit very well with the pseudo-second-order model and the Langmuir isotherm equation. In addition, various thermodynamic parameters, such as standard Gibbs free energy(ΔG°), standard enthalpy(ΔH°) and standard entropy(ΔS°) have been calculated. From thermodynamic studies, it was seen that the adsorption was spontaneous and endothermic. The main driving forces of the physical adsorption on DT are electrostatic attraction. The reason why DT showed higher adsorptivity for X-GRL than DC was that there were more clay mineral particles within, which has a remarkable ability of dye adsorption due to its high surface area. DT as a cheap absorbent for X-GRL removal would replace or partially replace the activated carbon.     

高炉喷煤用立式烟气炉的研制与实践

介绍了立式烟气炉的设计制作与生产应用。     

安徽庐江绢云母磁选漂白试验研究

安徽庐江绢云母资源丰富,但大部分矿点含铁较高,必须通过除铁漂白处理后才能满足用户对白度的要求.采用高梯度磁选机除铁和化学漂白,可使精矿白度＞85%,满足塑料、涂料及日化等行业对白度的要求.     

陕西某鳞片石墨矿选矿工艺试验研究

以陕西某地鳞片石墨矿为研究对象,在其X射线衍射分析和化学分析的基础上,进行了系统的选矿工艺试验研究,确定了最佳粗磨磨矿细度、粗选捕收剂用量、起泡剂用量及粗选矿浆浓度,并在此基础上进行了全流程的开路试验和闭路试验,并对闭路浮选精矿进行了成分和形貌分析。结果表明,该矿石为晶质片状石墨,固定碳含量为13.70%,主要脉石矿物为方解石和石英。经过系统选矿试验,最终确定采用一次粗磨、一次粗选、五次再磨和六次精选闭路流程,获得了精矿固定碳含量95.92%、回收率90.35%的良好指标。精矿分析结果表明,脉石矿物主要存在于粗粒级和细粒级中,鳞片石墨粒径大部分在50 μm以上,石墨鳞片结晶普遍较好,表面平滑,大鳞片石墨受到磨剥,有少量细小杂质颗粒附着于表面上。      

涂布级超细大理岩粉制备及其特征

以广东茂名某地-325目大理岩粉为原料。采用湿法搅拌磨超细加工工艺，讨论了磨矿浓度、磨矿介质配比、分散剂种类、用量、转速和时间等对磨矿粒度的影响。在最优工艺条件下，试验产品粒度特征是：-2μm〉90％、D90〈2μm，SEM形貌观察为板状或片状，涂布后各项物理指标达到了铜版纸要求的标准。     

淮北煤系高岭土补强天然橡胶试验研究

以表面改性的超细高岭土粉体（平均粒径1．54μm）为原料,研究其对天然橡胶的补强作用。通过不同种类偶联剂及高岭土填充量等试验研究表明,对于此淮北高岭土,适宜的偶联剂是钛酸酯;在填充量相同前提下,煅烧土对天然橡胶的补强效果优于未煅烧土;SEM分析可知,粉体粒度越细,补强效果越好。     

海泡石摩擦材料的研制

采用海泡石纤维作增强材料，共混改性酚醛树脂作粘合剂研制的摩擦材料摩擦系数平稳，磨损小，是一种性能优良的无石棉摩擦材料     

重晶石-石英-萤石型伴生矿选矿试验研究

湖南某重晶石矿与石英、萤石和铅锌矿等伴生,为综合开发利用该矿产资源,对其进行选矿试验研究。矿石中含0.98%的铅锌矿,具有一定回收价值,试验采用硫酸铜、乙基钠黄药优先回收铅锌混合粗精矿,浮选铅锌尾矿则采用水玻璃作石英等脉石矿物抑制剂,十二烷基硫酸钠为捕收剂浮出重晶石精矿。通过混浮铅锌、一粗、一扫和五精重晶石浮选闭路流程,获得了铅锌品位35.49%、产率2.54%的铅锌混合粗精矿,BaSO4品位92.15%、BaSO4回收率94.33%、比重4.3g/cm3的重晶石精矿,以及BaSO4品位仅5.07%的重晶石尾矿,实现了重晶石、铅锌矿与石英等脉石矿物的有效分离。铅锌混合粗精矿可进一步浮选获得合格的铅精矿与锌精矿。     

陆川富硅高岭土选矿试验研究

对陆川富硅高岭土进行了原矿性质分析和选矿试验研究，确定了合理的工艺流程，经捣浆、分级、磁选、剥片，获得产率为27．25％、Al2O3 22．17％、Fe2O3 0．40％、-2μm37．81％和产率为3．68％、Al2O3 27．12％、Fe2O3 1．25％、-2μm31．05％两种级别的陶瓷用高岭土，为陆川高岭土的开发利用提供了科学依据。     

蛭石摩擦材料研究

本研究采用经膨胀、剥片、表面处理后的蛭石作增强材料。腰果壳油、三聚氰胺改性酚醛树脂作粘合剂，制成摩擦材料。该材料冲击强度高、摩擦系数平稳、磨损小，是一种性能优良的无石棉摩擦材料。