Abstract: To solve problems arising during calcified roasting and acid leaching processes in vanadium extraction industrial test,the influence of key process parameters on extraction of vanadium was studied by taking vanadium slag from Pangang as raw materials.The research focused on the influence of Cao/V2O5...
Abstract: The grade of titanium slag may not meet the requirement in some short processes of titanium slag smelting.In order to solve the problem,a simulating experimental device of electric furnace was built under laboratory conditions to melt titanium slag,and pulverized coal was injected to the molten slag...
Abstract: Vanadium-bearing clay mineral is one of typical vanadium resources which are difficult to utilize.The feasibility of direct leaching of black shale-hosted vanadium-bearing clay mineral concentrates by H2SO4-CaF2-NaClO3 system was studied.Furthermore,the influencing factors of leaching were investiga...
Abstract: A laboratory test was carried out to prepare V2O5 from low-grade vanadium slag containing high calcium content by salt roasting-water leaching processes.By using the methods of single roasting and mixed roasting with ordinary vanadium slag,the technologies and relevant parameters were obtained for V...
Abstract: A study on mechanism of compact silicon coating of titanium pigment was carried out.Through thermodynamic analysis of silicic acid aqueous solution system,the advantage existing zones of H5SiO4+, H4SiO4,H3SiO4- and H2SiO42- produced by hydrolysis of silica gel were drawn.With the addition of silicat...
Abstract: With a pH value of 9.0 to 10.0,Zeta potential of rutile titanium dioxide slurry reaches the maximum value,and the titanium dioxide has the best dispersion property in water.In this paper,the changes of viscosity in the coating process were studied as sodium silicate,sodium hexametaphosphate, sodium ...
Abstract: La3+-doped TiO2 with different molar ratios of La/Ti(1/100,2/100,3/100,4/100 and 5/100) were prepared by a facile Sol-Gel method.The photocatalysts prepared were characterized by Brunauer-Emmet-Teller(BET) method,X-ray diffraction(XRD),UV-Vis diffuse reflectance spectra and surface photovoltage spec...
Abstract: Experiments reveal that while dispersed nanometer-sized vanadium carbides can greatly increase the yield strength of twinning induced plasticity(TWIP) steels,they may cause some reduction of the overall work-hardening rate.A modified physically based model is adopted in the present work to capture t...
Abstract: The precipitation behavior of the titanium-containing precipitated phases of titanium-alloyed high boron steel in liquid phase and during solidification has been studied by thermodynamic calculation and experiments.Solidification microstructures of the high boron steel were researched by means of op...
Abstract: The microstructure,hardness and impact toughness of as-cast or quenched Fe-C-B-Ti alloy containing 0.67%~1.82% of Ti were studied.The results show that the microstructures of the as-cast Fe-C-B-Ti alloys containing 0.67% of Ti consist of martensite,pearlite and reticular eutectic boride with high ha...
Abstract: An experiment research on the Ti-microalloyed container plate Q345R was conducted to test its mechanical properties,microstructures and precipitates.The results show that the tested steel has good strength,ductility,and low-temperature impact toughness.The misconstrues of the steel are composed of f...
Abstract: In order to increase the strength and yield strength-to-tensile strength ratio of the aseismatic rebar,high-strength aseismatic rebar HRB500E was produced by employing different microalloying way and cooling process after rolling according to practical production conditions of bar and wire rod units...
Abstract: In order to recycle lean slag from ferrovanadium(FeV50) smelting and treat wastewater from vanadium precipitation,lean slag with particle sizes smaller than 5 mm instead of lime powder was used after weathering and screening to neutralize the reduced wastewater with pH value of 7.0~8.5.The results i...
Abstract: In this study,a physical and mathematical model was established to simulate the dry centrifugal granulation (DCG) process of blast furnace slag,and the process was verified by small scale experiments.The influences of various factors,including molten slag temperature(or viscosity),surface tension an...
Abstract: In order to tackle problems found in blast furnace (BF) smelting of vanadium-bearing titaniferous magnetite,experiments were carried out.Operation conditions of the BF cohesive zone were simulated in a high-temperature MoSi2 furnace to study the influence of the addition of CaF2 and MgO to vanadium ...
Abstract: During smelting of iron ore containing low TiO2 content in blast furnace(BF),Ti(C,N) easily forms,which has a great influence on the performance of the slag and hot metal.Therefore,the study on its formation is of great significance for BF smelting.In this paper,the formation of Ti(C,N) in low TiO2 ...
Abstract: The mineral compositions,crystallization rates,thicknesses,layered structures of slag film of casting powder for continuous casting of Q235B steel plates were analyzed by optical microscope and Xray diffractometer.The result shows that the mineral compositions of slag film consist of akermanite,cusp...
Abstract: By taking a six-strand tundish in a certain company as the research subject,the temperature field and flow field,and erosion of refractory materials of tundish were systematically analyzed by combination of numerical simulation and physical simulation.The calculation results show that changing the f...
Abstract: Ultrasonic sent from self -designed ultrasonic device was used to influence solidification structures of steel C45 in experiments,and electric impulse generated from pulsed magnetic field device was employed to influence spring steel 60Si2CrVA before casting and 40 s after casting respectively.The r...
Abstract: Based on industrial tests in Nan Steel,experiments were carried out to study the effect of single and double slag processes on dephosphorization of molten steel,the effect of different operating system on phosphorus content in molten steel,the effect of adding amount of auxiliary materials on phosph...
Abstract: In order to extract niobium from Nb-bearing hot metal and obtain high-quality niobium slag,it is desired to reduce the silicon content in molten iron.Baotou Nb-bearing hot metal was smelted in 100 kW medium-frequency induction furnace by oxygen bottom blowing to study the selective oxidation of sili...
Abstract: The annealing cycle of the continuous annealing/hot-dip galvanizing dual-purpose line is different from that of the typical continuous annealing line which has no slow cooling section in addition to short annealing cycle and low cooling rate after annealing.The industrially-produced full-hard low ca...
Abstract: Based on field tests carried out during the manufacturing of high-speed steel rail in Baotou Rail and Beam Plant,effects of heating time and heating temperature on the thickness of decarburized layer of high-speed U71Mn rail are studied.Results show that in normal production,the thickness of the dec...
