提高尾矿设施的工作效率

本文叙述了卡奇卡纳尔采选公司与科研，设计单位合作开展科研工作，提高尾矿设施工作效率的经验。     

磁铁矿选矿技术和工艺的改进

本文叙述了在若干采选公司采用磁－重选矿法分选磁铁矿精矿的工业试验结果。试验结果表明，采用磁－重选矿法，不但能提高精矿质量，而且还能降低磨矿费用，减少由于矿泥所带来的铁的损失。磁－重选矿法的特点是把磁铁矿连生体粒级从磁铁矿精矿中排入到单独的料流中去，从面磁性粒组（接近于单一矿物成分）选入最后一两级选矿段。     

Compton scattering in a large-aperture positron imaging system

Compton scattering of gamma rays within the image volume has been assessed for a large-aperture positron-emission-tomography imaging system. The Compton scattered attenuation and the Compton scattered background were both modeled and measured for point sources centered in scattering spheres up to 10 cm in diameter. Good agreement was obtained between simulations and measurements. The attenuation problem is independent of the detector system, but its correction is more difficult in a large-aperture system. The scattered coincidence background is large in this system (43% for a 10-cm-diameter scattering sphere), but the background overlap is reduced with 3D imaging.     

Effect of a direct magnetic field on the interfacial microstructure between molten aluminium and solid iron

Many processing techniques, such as hot dip aluminizing, bimetal formation, liquid metal corrosion, cementing, welding and diffusion bonding, are basically dependent on interfacial reactions [1-3]. It is therefore important to investigate the formation and growth of intermetallic layers at the interface. There have been several studies carried out to examine chemical compositions and growth kinetics of intermetallic layers in the Al-Fe system [4-9]. Most authors have come to an agreement that…