Abstract: Based on the theoretical analysis and thermodynamic calculations of chemical reactions for sodium roasting of vanadium-chromium slag,the simultaneous extraction of vanadium and chromium by high sodium and low temperature roasting was proposed.The effects of particle size of vanadium chromium slag,ad...
Abstract: To explore the feasibility of direct reduction of vanadium and titanium bearing sea sand ore in gas-based shaft furnace,the oxidized pellets of the ore were obtained by roasting at 1 250 ℃ for 20 min,with compressive strength of 2 099 N,reduction index（RI） of 77.8%,reduction dusting index（RDI） at lo...
Abstract: According to the characteristics of ferrovanadium smelting in cylinder furnace and the current state of vanadium recovery for ferrovanadium smelting in the world,the factors influencing the vanadium recovery were systematically analyzed,and the bulk density of vanadium oxides as well as the ramming ...
Abstract: Nano-TiO2 thin films were prepared by agar coating method,and the photocatalytic properties of the prepared TiO2 thin films were studied.The thin films were characterized by XRD,BET,FESEM,FTIR,EDX and UV-Vis DRS.The results show that the crystal size of TiO2 prepared by agar coating can be reduced t...
Abstract: In view of the problems of fine particle size and high loss during electric furnace smelting of ilmenite concentrate,the sintering process of fine ilmenite concentrate was studied in this paper.It has the disadvantages of poor granulating,high burnup and low production efficiency for sintering of fi...
Abstract: In order to deeply understand the gas-based reduction mechanisms of sintered ilmenite concentrate,the isothermal reduction of the sintered ilmenite concentrate was performed under the reduction atmosphere of 30% CO and 70% N2 at 800,900 and 1 000 ℃,respectively.And the reduction kinetics was analyze...
Abstract: Graphene reinforced copper matrix composites were fabricated by titanium alloying and hot press sintering method.The tribological test was performed on a reciprocating tribometer.Phase was identified by X-ray diffraction（XRD） and microstructure and wear surface were determined by optical microscopy,...
Abstract: In this paper,titanium hydride（TiH2） was used as raw material to prepare high-temperature titanium alloys by powder metallurgy.The effect of tungsten content on high temperature plasticity of the prepared Ti alloy was explored at deformation temperature of 750～900 ℃,deformation amount of 50%,and str...
Abstract: The porous Ti-Al alloys were prepared by powder metallurgy technique with elemental powder mixing,partial diffusion and reaction sintering.The effects of Al powder addition on phase structure,pore morphology,porosity,compressive properties and corrosion resistance of the alloy were investigated.The ...
Abstract: The electromagnetic pulse forming test of Ti-6Al-4V-0.5Cr,a new titanium alloy for building,was carried out at different processing parameters,and the microstructure and mechanical properties of the alloy were tested and analyzed.The results show that the experimental alloys with better properties c...
Abstract: The effect of WC addition amount on the microstructure and mechanical properties of the TiC-based cermet was investigated using BSE,EDS and XRD.The results show that the hard phase of the cermet with WC added is constituted of white core-grey rim phase and black core-grey rim phase,both of which are...
Abstract: The mechanical vibration with various vibration frequencies and vibration time were introduced into the pouring process to prepare V3TiNi0.56 vanadium-based hydrogen storage alloy for automobile battery,and the corrosion resistance,charge-discharge cycle stability and microstructure of the obtained ...
Abstract: The research trends of steel composition,process and mechanical properties of nano phase ferrite were introduced.The influence of composition,finishing rolling temperature,cooling rate,coiling temperature and isothermal time of different Ti systems,Ti-Mo systems and Ti-Nb systems on the behaviors an...
Abstract: This paper introduces the control of deposition,composition and structure of materials in the process of high-speed electron beam evaporation under the control of vacuum and technological parameters.The hardware conditions are briefly discussed in order to provide an understanding way for the prepar...
Abstract: Gas quenching dry slag granulation process is one of the dry slag treatment processes,and granulation performance mainly includes the average diameter,size distributions and bead forming rate.The effects of different gas velocity and slag viscosity on the granulation properties were experimentally s...
Abstract: The TiC-containing slag,which is produced by carbon reduction of BF slag,containes Fe 1.7% ～ 3.2%.In this paper,the removal of Fe from TiC-containing slag was studied by means of SEM analysis and experimental study.The results of SEM analysis indicated that the particle size of Fe in the TiC-contain...
Abstract: To solve the problem of the exceeding S content in tail gas from a titanium dioxide plant,the S content of titanium ore and titanium slag raw materials was compared and analyzed.The S content of the tail gas under different acid hydrolysis conditions was simulated using sulfuric acid.Verification te...
Abstract: In this study,mechanical activation and chemical activation methods were used to improve the activity of cement mortar.The effects of activation methods on the structure and properties of tailings were studied.The influences of activation conditions and tailings amount on the mechanical strength of ...
Abstract: The development and utilization of high-phosphorus iron ore are restricted due to its high content of phosphorus.The occurrence state of phosphorus in high-phosphorous iron ores had been investigated by XRD diffraction.And based on the thermodynamic calculation results of FactSage7.2,the measures of...
Abstract: In this study a three-dimensional mathematical model of electromagnetic stirring in billet mold was developed by adopting ANSYS finite element analysis software.The effects of different process parameters on magnetic flux density and electromagnetic force in the billet mold were discussed.It is foun...
Abstract: In order to clarify the precipitation rule of precipitated particles in the solidification process of X80 pipeline steel,the Thermo-calc software was used to analyze the austenite and ferrite phase transition temperature,the type of precipitates,the precipitation temperature of the precipitates and ...
Abstract: In the process of developing ULC SM490 A by Ti microalloying,excessive strength fluctuation was caused by different Mn content. Therefore,the influence of Mn on the microstructure and mechanical properties of ULC Ti microalloy steel has been studied. It is found out that when the Mn content was incr...
Abstract: In this study,the redissolution and precipitation behaviors of niobium titanium carbonitride（Nb,Ti）（C,N） were researched by electrolytic phase analysis method and calculated by the simplified thermodynamic calculation method,and the dissolution law of Nb and Ti elements in high Nb pipeline steel was...
Abstract: The types,production process and development status of high speed steel are summarized.The effects of ESR process,hot processing deformation process,heat treatment process,cryogenic treatment and modification treatment on the carbides in high speed steel production,which are mainly based on smelting...
Abstract: The 0.24%C-1.5%Si-2.0%Mn-0.16%V cold-rolled steel was heat treated at 780 ℃ intercritical annealing for 180 s,then quenching into 350～380 ℃ for 360 s,or quenching into 380 ℃ for holding 60～1 200 s.The microstructures and properties after heat treatments were tested by tension test,OM,SEM and XRD ana...
Abstract: The influence of annealing process on microstructure and mechanical properties of super high strength steel DP1180 was studied by means of thermo-simulator system Gleeble-3500,field emission scanning electron microscopy and transmission electron microscope.The results show that the yield strength de...
Abstract: In a typical process,mild steel and dual phase steel were respectively annealed at 800 ℃ for 90 s,cooled slowly to 680 ℃ and then cooled rapidly to 300 ℃ to carry out the overaging treatment.As a result,the ferrite-cementite mild steel and ferrite-martensite dual phase steel were obtained after the ...
Abstract: The properties and structure changes of a cold-drawn pearlite steel wire annealed at 200～300 ℃ were studied,and the strengthening and toughening mechanism during tempering was revealed by means of scanning electron microscopy,transmission electron microscopy,X-ray diffraction and conventional mechan...
Abstract: In this study a lot of production verification and test had been conducted to find the factors that influence the corrosion performance of fingerprint resistant sheet. It is found out that the corrosion resistant properties of hot dip galvanized fingerprint resistant mainly relates to drying tempera...
Abstract: In this paper,the oxy-combustion melting furnace developed by a company had been taken as the research object.Based on the VOF multi-phase flow model and the Realizable k-ε model,the gas-liquid two-phase flow in the molten pool area of the melting furnace had been numerically simulated.Under the sta...
