Abstract: In this paper,the leaching behavior of vanadium and chromium was studied by ultrasonic assisted leaching,and the optimum process parameters were obtained.The effects of ultrasonic power,leaching medium concentration,liquid-solid ratio,leaching temperature and leaching time on vanadium-chromium leach...
Abstract: Calcification roasting process of vanadium slag is just currently situated at pilot stage of industrialization in China,while the recovery ratio of vanadium from vanadium slag is only 69.7%.It is not clear so far whether the calcification or leaching process leads to the low recovery ratio. This pap...
Abstract: The mineral and chemical compositions,occurrence and distribution of the valuable elements,the structure and tectonics of vanadium slag were characterized by X-ray powder diffraction,optical microscope,X-ray fluorescence,scanning electron microscopy and energy dispersive spectrum,aiming to provide a...
Abstract: In order to solve the problem of low brightness and brightness fluctuation for titanium dioxide（TiO2） produced by a certain plant,a systemic investigation related to influences of the raw materials and process of post-processing on brightness of TiO2 was carried out in basis of industrial conditions...
Abstract: A new method for preparing Ti powder by thermal reduction at low temperature was explored with industrial titanium dioxide（TiO2） powder and AR（Analytical Reagent） calcium hydride（CaH2）powder as raw materials.The decomposition conditions of CaH2 and the process for reduction of TiO2 by decomposed CaH...
Abstract: In this paper,the microstructure of titanium formed on the reactor wall during titanium sponge production by Kroll process was investigated to further analyze the growth process of wall-adherent titanium and its influencing factors for accumulation.The results show that the generation of wall-adhere...
Abstract: All-vanadium redox flow battery（VRFB） is one of the most promising large-scale energy storage technologies,owing to its inherent safety and long service life.During the charging-discharging process,the redox reaction of V（Ⅲ）↔V（Ⅱ） with standard electrode potential of-0.25 V（vs.NHE） is the main electr...
Abstract: Focusing on the hydrogen induced stress corrosion cracking（HISCC） of titanium alloy in deep sea,this paper calculated hydrogen diffusion in metal with the stress induced diffusion method and introduced the hydrogen reducing surface energy model into HISCC process to simulate the cycling of the mater...
Abstract: The aluminized TC4 alloy was prepared by hot-dip aluminizing and subsequently high-temperature annealing treatment. The morphology,phase and compositions of aluminized coating were characterized with SEM,XRD and EDS.Dry sliding wear behaviors at different velocities and loadings were conducted for t...
Abstract: Preparation of Ti N via reaction of Mg3N2 and TiCl4,and its yield ratio were studied respectively through XRD,SEM and orthogonal experiments.The results show that TiN can be obtained by the reaction of Mg3N2 and TiCl4,and the product is of irregular morphology with nonuniform particle size.The react...
Abstract: Ultrasonic casting of V3Ti0.56Cr0.1Mo0.1 vanadium-based hydrogen storage alloys was carried out at different ultrasonic vibration frequencies and pouring temperatures,and the hydrogen storage property and electrochemical cycling stability of the samples were tested and analyzed.The results show that...
Abstract: In this paper,the development and present application of high-temperature titanium alloys were introduced.The research status and influence of alloying elements on high-temperature titanium alloys domestic and abroad were contrasted and analyzed.Titanium alloys with 600℃ of working temperature mainl...
Abstract: The polycyclic aromatic hydrocarbons（PAHs） were collected from absorbing media of activated carbon and silicon carbide by dichloromethane and glass fiber. Ultrasonic extraction and high performance liquid chromatography（HPLC） were used to qualitatively and quantitatively analyze the low cyclic polyc...
Abstract: Taken Tangshan iron and steel blast furnace slag as the main raw material,Cr2O3,TiO2,Fe2O3 and P2O5 nucleating agent had been added with a certain proportion of other raw materials,and the blast furnace slag microcrystalline glass had been prepared by melting method. Differential thermal analyzer（SE...
Abstract: The reaction mechanism of low-grade limonite powder in the process of heating with different carbon-oxygen ratio was revealed by thermal analysis at temperature of 20 ~1 100 ℃,using coke quenching ash as a new reducing agent.The effects of different carbon ratios on the reaction rate were studied.Th...
Abstract: The equilibrium mineral components in the crystallization process of medium-titanium blast furnace slag are calculated by using FACTSage 7.0 thermodynamics software,and the influence of different chemical composition on mineral precipitation process and mineral composition of medium-titanium blast f...
Abstract: In the blast furnace smelting,the consumption of carbon is determined by the sum of the calorific carbon consumption and the carbon loss of the reduction reaction.During the smelting process,as the direct reduction of iron rdincreases,the direct reduction carbon consumption increases,and as the reac...
Abstract: Processing slag and ending slag of vanadium-extraction converter was analyzed and the slag formation and the existing form of phosphorus in the slag had been investigated. It is found out that addition of lime into the vanadium-extraction converter during production can achieve dephosphorization fro...
Abstract: The refractory absorption bar is inserted into the submersed nozzle by stopper to absorb the inclusion flowing through the nozzle and the cleanness of liquid steel during the continuous casting process can be improved. The influence of the depth of groove,the direction of rotation and the number of ...
Abstract: The particle image velocimetry-PIV technique was used to study the factors affecting the flow state in the continuous casting mold.i With the increase of casting speed,the distance of narrow face impact point to level decreases,and difference in the level flow velocity decreases,resulting in the flo...
Abstract: The electromagnetic stirring,total amount of soft reduction and the matching between super heat and casting speed were researched in order to control carbon segregation index of transverse section and center segregation in rail steel bloom. The key technologies of segregation control in 320 mm×410 m...
Abstract: In order to reduce the crack of 304 austenitic stainless steel pipe,the experiments of composition optimization,F-EMS and superheat controlling have been done to optimize solidification structure.The area fraction of δ ferrite in structure of billet center decreases from 8.6 % to 7.2 % through compo...
Abstract: The composition of steel is an important factor affecting the solidification structure of slab.In this paper,the influence of the composition of low carbon steel Q235 on the solidification structure is studied based on the CAFE method. The increase of C content and the increase of C content make the...
Abstract: The causes of surface transverse crack on S355 ML beam blanks had been investigated by metallographic,SEM,TEM observations and nozzle flow field analysis,in combination with thermal imaging temperature of continuous casting billet. Results show that the flow field distribution of through-type nozzle...
Abstract: The structure,composition,particle size of micro-inclusions in laboratory as-cast shipbuilding steel with different content and type of elements were analyzed. It was found out that some kinds of inclusions in steel can induce nucleation of IAF and the needle tip of IAF can insert into other ferrite...
Abstract: Cracking technology requires materials with advanced performances of high strength,low toughness,well-cutting and small plastic deformation during brittle fracture.The C70 S6 steel is an important material for fracture splitting connection rod.The steels produced by Chinese and overseas steelmakers ...
Abstract: To explore the influence of spray angle on the atomization process of Sm Fe melt,the structure of nozzle based on the close-coupled nozzle,the atomization process of Sm Fe melt has been simulated using Fluent,and the influence of different spray angles on the flight distance before solidification of...
Abstract: In order to obtain excellent mechanical property of 780 MPa cold rolled dual phase steel,process optimization had been done including adjusting the chemical elements C、Si、Nb、Ti、Cr and coiling temperature.And the microstructure observation and mechanical properties measurement of hot and cold rolling...
Abstract: In this paper FEM software were used to simulate rolling process of conjugated pass system of some enterprise,bend and twist of rolled piece during rolling had been identified. The reasons which caused these problems had been found out by quantification and transformation analysis,and optimization o...
