Abstract: In order to reduce the highly impure ilmenite by carbon at solid phase,the mechanism of the catalytic reduction of ilmenite by thermogravimetric analysis has been studied. The results show that impurities hinder the process of ilmenite reduction. Low reduction rate occurs during the catalyst-free re...
Abstract: Sintering of roasting materials during calcination of vanadium slag may lead to low leaching ratio or even interruption of production processes. Reasons for material sintering and various influencing factors were studied. The research results show that the solid low melting point materials transform...
Abstract: Based on analyses on traditional stone coal roasting equipments,a roasting shaft furnace equipped with internal vertical air channels(IVAC) and drying bed for vanadium extraction from the stone coal was developed. Through comparison with the roasting shaft furnace for vanadium titaniferous magnetite...
Abstract: To reduce the insolvable solid-phase object emerged during acidolysis of sulfate process route for titanium pigment production,the structures and compositions of the object are analyzed. It can be concluded through laboratory experiments that insufficient mixing of sulfuric acid and ilmenite concent...
Abstract: Taking titanium pigment as raw material,experiments were conducted to prepare Ti-Al master alloy by aluminothermic reduction. Through single factor experiments,the optimum result was obtained with aluminum adding coefficient of 1.7,unit thermal effect of 2850 kJ/kg and lime adding coefficient of 0.9...
Abstract: In order to achieve the goal of lowcost production of high-purity V-Al master alloy,the feasibility of employing water-cooled copper crucible to prepare the alloy by"one step"aluminothermic reduction process is probed into. After several rounds of experiments,compared with the traditional refractory...
Abstract: According to physical and chemical characteristics of blast furnace dusts,an experimental study on different binder for the carbon-containing pelletized dusts was carried out. The experiment results show that different binder has different mechanism for binding pellets,which leads to different bindi...
Abstract: The effect of influencing factors including melting temperature,alkalinity,slag to iron ratio and metalizing rate on the melting rate of metalized pellet of vanadium-bearing titaniferous magnetite was studied. The results indicate that the melting rate increases with the increase of melting temperat...
Abstract: The metallized pellet of vanadium-bearing titaniferous iron ore concentrate containing iron,vanadium,titanium and other elements is the product of coal-based direct reduction of the concentrate in rotary hearth furnace. By using laboratory wet magnetic separator,a new technology of magnetite separat...
Abstract: In order to make clear how non-metallic inclusions were removed from molten steel through bubble adhesion,water modeling was carried out to monitor the process with high-speed video and image processing software. The mechanism of inclusion removal by bubble adhering was analyzed,and the influencing ...
Abstract: Microstructures,mineral compositions,shapes and sizes of the blast furnace slag with medium titanium content were systematically studied by polarizing microscope and scanning electron microscopy. The results show that the slag consists of granular poikilitic and porphyritic microstructures,and its m...
Abstract: In order to satisfy the requirements of consumers on sulfur content in non-oriented electrical steel,taking(CaO-CaF 2) based flux as desulfurizer,industrial experiments on deep desulphurization of non-oriented electrical steel were carried out during RH process. The results show that as the composit...
Abstract: The change pattern of oxygen content and inclusions in liquid steel during deoxidizing was investigated through experiments,and the relationship between inclusions and microstructures was also analyzed. The results show that the oxygen content stabilizes around 0.001%(mass fraction) after deoxidizin...
Abstract: Taking Tanggang FTSC tudish as the prototype,tundish schemes with gas curtain installed in different position are designed. The research on flow fields of steel in the tundish and inclusion movement in different scheme shows that the gas flow rate and gas blowing position have noticeable effect on t...
Abstract: Comprehensive seisimic performance of grade 400 MPa rebars manufactured by V-N microalloying,QST and fine-grained process routines was experimentally evaluated according to increasingly accepted earthquake resistant evaluation index based on high strain low cycle fatigue behavior. Vanadium microallo...
Abstract: In view of large amounts of cracks formed in the hypo-peritectic HSLA steel during solidification,the cracks on the surface of strands were analyzed by optical microscope,SEM and EDS,and the precipitates were studied by thermodynamic calculation. Furthermore,hot ductility was studied by Gleeble-1500...
Abstract: High collapse-resistance oil casing SEW-110T was designed and developed on the basis of sufficient understanding of the casing's operating conditions in oil field. The performances of SEW-110T were evaluated by tests of mechanical property,tensile strength,hydrostatic pressure and external pressure ...
Abstract: Experimental study was carried out for improving strength and toughness of non-quenched and tempered casing tube N80. The results show that strength and impact toughness can be improved by adopting appropriate controlled cooling process after rolling or increasing cumulative deformation in the auste...
Abstract: The effects of cooling rate on microstructures and mechanical properties of welding heat affected zones in X80 pipeline steel were studied by thermal simulation test. After thermal simulation,the microstructures of X80 pipeline steel were observed by optical microscope,and the mechanical properties ...
Abstract: Through testing,SEM and TEM observation and XRD analysis for common mechanical properties of 9NiCrMo steel under different tempering temperature,the effect of tempering temperature on mechanical properties and microstructures of the steel was studied. The steel shows relatively high strength and goo...
Abstract: According to characteristics of high-strength weathering steel for railway use,variation of resistance to atmospheric corrosion of the steel was studied by adjusting the content of nickel. The results reveal that with low content of nickel and chromium,there are cracks existing between the base meta...
Abstract: By using instruments including metalloscope,scanning electron microscope,Xray diffractometer(XRD) and energy spectrometer,scale on the surface of hot-rolled strip steel produced by 1 810 mm hot-rolling mill and furnace roller was analyzed on layering phenomenon,microstructure,microtopography,composi...
