Abstract: Titanium was recovered from spent SCR catalyst by sodium roasting.The effects of sodium dosage,roasting temperature,roasting time,material particle size and sulfuric acid concentration on titanium leaching rate were studied.From the experimental results,the optimum roasting conditions were selected ...
Abstract: Using Panzhihua ilmenite and sulfuric acid as raw materials,the leaching kinetics of the ilmenite in sulfuric acid was studied,and the ilmenite coupled with the leaching residue was characterized by SEM,mineral analyzer and XRD.The research results show that at the reaction temperature of 83 ～ 111 ℃...
Abstract: Adopting the technical route of experimental research combined with the industrial production,this paper determined the solubility of ferrous sulfate in water to explore its crystallization kinetics characteristics and investigate the filter cake liquid content with different crystal sizes.Simulatio...
Abstract: The oxygen content in aerospace-grade vanadium aluminum alloy has an important effect on the properties of downstream titanium alloy materials.Aiming at the problem of high oxygen content in vanadium aluminum alloy prepared by aluminothermic smelting,the occurrence state of oxygen in V-Al alloys was...
Abstract: Based on the electro-aluminothermic process for FeV50 alloy production,the influencing factors on Al and P content in FeV50 alloy and the causes of the oxidation surface of the alloy were analyzed.The technical parameters for production of upscale FeV50,with w(Al) ≤ 1.0%,w(P) <0.06% and without o...
Abstract: In view of the problems of high Na/V ratio and low vanadium concentration of carbonation leaching solution of calcium vanadate,a new method of preparing ammonium metavanadate by mixed leaching of sodium bicarbonate and ammonium bicarbonate was proposed.The effects of the leaching agent compositions,...
Abstract: Different contents of Zn was loaded on V-Mo/Ti catalyst by impregnation method,and the activity of selective catalytic reduction of NO by NH3 was evaluated.The catalysts were characterized by XRD,N2 adsorption-desorption,NH3-TPD,H2-TPR and NO-TPD.The results show that Zn loading does not change the ...
Abstract: An integrated non-stoichiometric titanium dioxide/carbon nanofiber electrode was prepared by electrospinning-impregnating-calcination method and used for supercapacitor.Fine TiO2 nanoparticles were anchored onto the surface of carbon nanofiber substrate with the diameter of 80～100 nm.And non-stoichi...
Abstract: The Ni-Sn/TiO2 composite coatings were prepared by electrodeposition. The effects of stirring rate on surface morphology,composition and corrosion resistance of Ni-Sn/TiO2 composite coatings were studied by scanning electron microscopy,energy dispersive spectroscopy,Tafel curve and electrochemical i...
Abstract: In this work,a series of catalyst were successfully fabricated via hydrothermal method,which were used as efficient UV light photocatalytic degradation of ammonia nitrogen from aqueous solution.The surface properties of the catalysts were characterized by scanning electron microscope（SEM）,X-ray diff...
Abstract: The high temperature sensible heat storage material was prepared via powder metallurgy method,using the iron extraction tailing obtained by carbothermal reduction of the vanadium extraction tailing as the raw material and graphite as the modifier respectively.XRD results show that the main phases of...
Abstract: The neural network model with 6×36×12×1 four-layer topological structure was used to optimize the performances of the negative electrode material of vanadium based hydrogen storage battery.The input layer parameters were titanium content,nickel content,aluminum content,chromium content,holding tempe...
Abstract: Taking a vanadium-titanium magnetite in Panxi as the research object,a beneficiation test was carried out for the titanium magnetite and ilmenite.The titanium magnetite was recovered by the process of pre-throwing tailings followed by two-stage grinding and magnetic separation,and the iron concentra...
Abstract: In this paper the olivine type of vanadium-titanium magnetite had been analyzed by X-ray fluorescence spectrum and X-ray diffraction spectrum to identify the raw ore mineral compositions. The main valuable metal elements in raw ore are iron and titanium,thus comprehensive utilization of iron and tit...
Abstract: Taking the raw ore,concentrate and tailings from Baima concentrate in Panxi zone as the research object,the chemical elements,mineral compositions and monomer dissociation degree of the samples were analyzed by means of chemical analysis and AMICS.The content of titanomagnetite,ilmenite and gangue,t...
Abstract: The process mineralogy characteristics of a titanomagnetite in Ankang region were studied by means of X-ray fluorescence spectrometry（XRF）,optical microscope,scanning electron microscope（SEM）,X-ray energy spectrum probe（EDS）,etc.The chemical analysis results of the crude ore show that the main eleme...
Abstract: In order to study the effect of temperature,holding time and thickness of steel sheet on decarburization of Fe-C alloy sheet in CO-CO2 atmosphere,the experiments were carried out in a weak oxidation atmosphere of Ar-CO-CO2 on 2 mm,1.5 mm and 1 mm thick Fe-C alloy sheet with initial carbon content of...
Abstract: Titanium powder and pulverized coal co-injection is the process in which rich titanium powder is mixed with raw coal and injected into blast furnace through tuyeres.The industrial test of titanium powder and pulverized coal co-injection was carried out in a 2 500 m3 blast furnace to verify the pract...
Abstract: Microstructure and strengthening mechanism of low carbon micro-alloyed steel with different contents of titanium were characterized by OM and SEM analysis and tensile and impact testing.With the increase of titanium content,the strength and yield ratio of the tested steel increased,while the elongat...
Abstract: In this paper,ithe thermal recycling of LF furnace refining slag for the production of non-low silicon aluminum killed steel was studied.Slag samples and liquid steel samples were taken from LF refining furnace,and the changes of compositions of liquid steel and quantity density of inclusions in LF ...
Abstract: In order to explore the effect of rare earth on inclusions in high-sulfur free-cutting steel,the high temperature simulation experiments and thermodynamic analysis were carried out in this work.The results showed that the types of inclusions were MnS and CeAlO3.MnS could precipitate on the surface o...
Abstract: The phase transformation and precipitation behavior of acicular ferrite in high-rise construction steel was observed in situ by high temperature laser confocal microscope.According to its nucleation site the ferrite can be classified into crystal interface,grain boundary edge and inclusions.The nucl...
Abstract: In this work effect of annealing temperature on microstructure,mechanical properties and retained austenite of 1 000 MPa Q＆P Steel were studied by means of SEM,EBSD,XRD and tensile test at room temperature.Results showed that the microstructure at room temperature was mainly composed of ferrite（F） +...
Abstract: In order to study the influence of tellurium on the morphology of MnS inclusions in 303Cu freecutting stainless steel,various amount of tellurium was added into 303Cu steel,and then the morphology and distribution of MnS inclusions in steels was analyzed by means of OM,SEM and microelectrolysisdding...
Abstract: To reveal the inclusion evolution and its influence on the inner microstructures of high strength steel treated by Ti alloying Ca,we used scanning electron microscope and energy dispersive spectroscopy to characterize the inclusion characteristics and its induction to ferrite behaviors.We compared t...
Abstract: In this paper the size and quantity of inclusions in different parts of spring steel slab and steel was determined by using Aspex inclusion automatic scanning electron microscope,and the fatigue properties of the materials were tested using a rotating bending fatigue tester.The rules of the distribu...
Abstract: Microstructure and mechanical properties of FTSR 65Mn steel strips produced by different hot coiling technologies was investigated,and simulated quenching heat-treatment were carried on. The result shows that ferrite reduces in term of its volume fraction and finically disappears with coiling temper...
Abstract: In order to improve the hardness and heat resistance stability of H13 steel surface,a 9% Ni-Fe alloy coating was prepared on the surface of H13 steel by laser cladding technology.Microstructure,phase composition,and micro-hardness of the alloy coating and thermal stability was investigated by X-ray ...
Abstract: In this paper,a new type of mechanical die steel specimens containing titanium with different titanium contents were prepared,and their wear resistance at room temperature,high temperature wear resistance and high temperature oxidation resistance were tested and analyzed.The results show that with t...
Abstract: Superalloy GH2909 bars produced by a Chinese supplier present high notch sensitivity during high temperature creep performance test.In order to understand the reason for this issue,the imported and studied GH2909 alloy bars had been compared in terms of their chemical compositions,microstructures an...
