弓长岭高品位磁铁矿精矿和低尾矿的选别技术

鞍钢弓长岭选矿厂磁选生产已运转４０年,在高品位磁铁矿精矿和低尾矿的选矿技术方面积累了丰富的生产经验。文中介绍了粗精矿生产工艺流程,高品位的磁铁精矿生产工艺流程和低尾矿生产工艺流程。     

用磁铁精矿生产锶铁氧体预烧料的工艺研究

究了用磁铁精矿制取超纯铁精矿,并用超纯铁精矿取代铁红或铁鳞生产锶铁氧体预烧料。在ｎ＝５．６和预烧温度为１２８０℃,预烧时间为１ｈ的条件下,可制备优质锶铁氧体预烧料     

Heat immunotherapy using magnetic nanoparticles and dendritic cells for T-lymphoma

Dendritic cells (DCs) are potent antigen-presenting cells that play important roles in regulating immune responses in cancer. Immunotherapy using these immunocytes has become an accepted therapeutic modality. We previously reported that hyperthermia using magnetic nanoparticles induces antitumor immunity, which could be activated by adjuvant including cytokines. In the present study, we investigated the therapeutic effects of hyperthermia combined with DC immunotherapy on mouse EL4 T-lymphoma. Magnetite cationic liposomes (MCLs) have a positive surface charge and generate heat in an alternating magnetic field (AMF) due to hysteresis loss. MCLs were injected into an EL4 nodule in C57BL/6 mice, which were subjected to AMF for 30 min. The temperature at the surface of the tumor reached 45 degrees C and was maintained by controlling the magnetic field intensity. Hyperthermia treatment was repeated twice with 24 h intervals. After hyperthermia, immature DCs were directly injected into the EL4 nodule. As a result, complete regression of tumors in 75% (6/8) of the mice was observed, while the percentage of complete regression of tumors was 12.5% (1/8) in the case of mice treated by hyperthermia alone. This novel cancer therapy, which we have termed "heat immunotherapy", may be applicable to patients with advanced malignancies.     

凹山选厂入选高村与凹山混合矿石的工艺适应性研究

通过以凹山与高村贫磁铁矿混合矿石的选矿试验研究,说明凹山选厂现流程处理混合矿石可以获得合格的精矿,高村铁矿作为凹山的接替矿山在选矿选矿工艺上是可行的,但凹山选厂现有工艺应作部分技术改造。     

A Comparison Study on the Magneto-Responsive Properties and Swelling Behaviors of a Polyacrylamide-Based Hydrogel Incorporating with Magnetic Particles

This work investigates the mechanical properties, microstructures, and water-swelling behavior of a novel hydrogel filled with magnetic particles. The nanoparticles of magnetite (Fe₃O₄) and the micro-particles of carbonyl iron (CI) were selected and filled into a polyacrylamide (PAAM) hydrogel matrix to create two types of magnetic hydrogels. The isotropy and anisotropy of magnetic hydrogels are also presented in this study. The isotropic samples were cured without applying a magnetic field (MF), and the anisotropic samples were cured by applying an MF in the direction perpendicular to the thickness of the samples. The effects of the size, content, and inner structures of magnetic particles on the magneto-responsive and swelling properties of magnetic hydrogels were investigated. It was found that the magnetorheological (MR) effect of anisotropic samples was apparently higher than that of isotropic samples, and the hydrogels with CI exhibited a noticeable MR effect than those with Fe₃O₄. The storage modulus can be enhanced by increasing the filler content and size, forming an anisotropic structure, and applying an external MF. In addition, the magnetic hydrogels also have a swelling ability that can be tuned by varying the content and size of the particle fillers.     

包覆双层表面活性剂Fe3O4纳米粒子的制备及性能研究

为制备稳定的水基磁流体,分别以月桂酸、油酸钠、十二烷基苯磺酸钠作为外层表面活性剂,对包油酸的Fe3O4粒子进行了再包覆.将得到的双层包覆的Fe3O4粒子分别分散在水中,发现以十二烷基苯磺酸钠为外层表面活性剂的磁粒子制成的水分散液的稳定性最佳.利用IR研究其吸附机理,结果显示:内层的油酸通过化学键合吸附在磁粒子表面,外层的十二烷基苯磺酸钠通过物理作用吸附在包油酸的Fe3O4粒子表面.     

钒钛磁铁矿在攀成钢高炉上的冶炼实践

攀成钢炼铁厂3号高炉（335m^3）进行渣中TiO2含量分别为8％、10％、12％、15％四个阶段的工业性试验,通过在烧结和球团中配加一定比例的钒钛矿精粉,提高入炉原料中二氧化钛含量,通过加强原燃料的稳定,强化高炉操作和管理,试验取得了阶段性成功,为攀成钢大规模进行钒钛矿冶炼提供了宝贵的经验。     

烧结配加矿化剂的试验研究

在试验室条件下,研究了钒钛磁铁精矿配加矿化剂对烧结过程及成品的影响。结果表明,配加矿化剂后,成品率提高2．26％,利用系数提高9．60％,烧结矿矿相组成和热强度明显改善,RI指数升高1．12％,RDI指数下降1．41％。     

磁铁矿砂制取氧化铁红的研究

研究了磁铁矿砂在氧气气氛中焙烧制备氧化铁红 ,给出了详细的试验条件。试验结果表明 ,所制备的氧化铁红符合 GB186 3- 89的要求。     

配加澳矿烧结矿矿物组成及显微结构的研究

针对进口澳矿配加蛇纹石或白云石,以及添另国内磁铁精矿所进行的烧结试验,采用显微结构研究的方法进行了分析。研究表明,烧结矿中有大量铁酸钙生成,烧结矿的质量优良。为进一步利用好国内外铁矿资源提供了理论依据。