The overall situation of the global vanadium industry was elaborated and analyzed from the global vanadium resources and the production capacity, the output, supply and demand, import and export, as well as the market prices of vanadium pentoxide, ammonium metavanadate, ferrovanadium and vanadium-ni...
Abstract: In this paper, a marine placer from Indonesia is used as the testing material. Its chemical composition and mineral composition were analyzed by XRD, and the reduction characteristics and the regulation mechanism of the valuable elements of the ore are discussed on the basis of thermodynamics. The r...
Abstract: In this paper, the vanadium slags with different calcium contents were obtained by remelting and crystallizing the mixture of CaO and Xichang vanadium slag with low-CaO contents. The changes of phase and micromorphology of vanadium slags with different calcium contents were observed by XRD and SEM-E...
Abstract: In this study, the alkaline powder is mainly sodium sulfate, containing 3.4% V2O5, which can not be dissolved in acid or alkali. If vanadium is directly roasted and then extracted, vanadium and a large amount of sodium sulfate will enter the solution and form a low vanadium solution with low vanadiu...
Abstract: This paper introduces five common recovery methods including chemical precipitation, ion exchange, adsorption, electrolysis and solvent extraction, expounds their process routes and basic principles, and analyzes and summarizes their advantages and disadvantages. According to the characteristics of ...
Abstract: In order to study the effect of large-size transition-metal element Ti on σ(FeV). FeV alloys with different Ti contents were prepared by arc melting, and phase identification and microhardness testing were conducted. The results show that with the increase of Ti concentration from 5% to 15%, the pha...
Abstract: The ternary layered cermet of Ti4AlN3 was prepared by powder metallurgy. The effects of raw powder, sintering temperature and holding time on the purity of Ti4AlN3 ceramic were studied. The samples were qualitatively analyzed by X-ray diffraction (XRD) and quantitatively analyzed by TOPAS based on R...
Abstract: (TiC+TiB)/Ti-6Al-4Sn-8Zr-0.8Mo-1.5Nb-1W-0.25Si titanium matrix composites were prepared by vacuum induction suspension melting, with the reinforcement composition volume ratio respectively at 0%, 2% and 4%. The microstructure and high temperature tensile properties of the composites were investigate...
Abstract: The laser tailored welding process of HC340LA and HC260LA low-alloy high-strength steels with different thicknesses was studied, and the welded joints were tested and analyzed by X-ray flaw detection, static tensile, metallographic structure and microhardness. The results show that the low-alloy hig...
Abstract: The dynamic globularization of a near α titanium alloy tube during hot rolling was studied by observation of different regions of the pipe using metallographic analysis and electron backscatter diffraction (EBSD) technology. The results showed that the fraction of globularized α phases near the oute...
Abstract: In this paper, sub-micron α-alμmina powders were prepared by physical mechanical milling of α-alumina powder with D50 = 1.08 μm, and then applied to lithium-ion battery separator coating modification. The sub-micron α-alumina powder was applied to the PE membrane coating of lithium-ion battery. The ...
Abstract: The microstructure, wear resistance and tensile properties of high-strength steel were tested and analyzed by adding different content of vanadium in high-strength automobile steel. The results show that the addition of vanadium is beneficial to refine the internal structure of the steel and improve...
Abstract: Titanium dioxide (TiO2) through chloride process is the mainstream production technology of titanium dioxide industry in the world nowadays, and the structure design of oxidation reactor is a key technology for the production of titanium dioxide by chlorination. The mixture of TiCl4 and O2 plays a d...
Abstract: The analysis method of vanadium, chromium and silicon in the process of vanadium extraction from vanadium slag by sub-molten salt was studied. The content of vanadium and chromium was determined by ammonium persulfate oxidation and ammonium ferrous sulfate titration. At 15%～20% sulfuric acid acidity...
Abstract: Waste acid after processing titanium dioxide contains valuable resources. The reprocessing and value-added of waste acid is gradually becoming the focus of titanium pigment industry. In this paper, the current situation of recovery and utilization of waste acid from titanium dioxide have been review...
Abstract: In this paper theoretical analysis and experimental verification are combined in order to study the dephosphorization ability of the converter gasification dephosphorization slag when it is recycled and reused. Gasification dephosphorization slag had been prepared by using coke powder to reduce conv...
Abstract: The blockage of the waste acid heat exchanger of sulfuric acid process titanium dioxide had been investigated through chemical composition analysis and XRD analysis, and caused by a mixture of calcium sulfate, ferrous sulfate monohydrate and meta-titanic acid. These mixture is derived from calcium s...
Abstract: Based on the analysis on hot utilization of stainless steel refining slag, considering the characteristics of electric furnace which it is primary steelmaking process and using electric power, a test on hot pouring residual utilization in electric furnace had been carried out. It is found out that h...
Abstract: Taking vanadium-titanomagnetite (VTM) from Panxi zone as the investigation object, the feasibility of microwave selective separation of VTM was analyzed theoretically through finite element simulation, and the effects of microwave power and treatment time on its dissociation were investigated. The i...
Abstract: In order to study the influence of Mn content and decarburization temperature on decarburization effect of ferromanganese carbon alloy thin strip in Ar-H2O-H2 atmosphere, the ferromanganese carbon alloy thin strip in 1mm thickness with initial carbon content of 3.90% and manganese content of 0, 0.30...
Abstract: A three-phase flow mathematical model of argon/liquid steel/slag for a 180 ton ladle was established by using the multi-phase flow volume method according to design parameters of ladle. The interface behavior and mixing phenomena of three-phase flow in the process of bottom blowing argon in the ladl...
Abstract: The development process and existing problems of electromagnetic stirring technology for continuous casting slabs were briefly described, focusing on the working principle and technical characteristics of electromagnetic stirring in the mold and the secondary cold zone during the production of conti...
Abstract: The vanadium microalloyed tested steel was heated to 780 ℃, 800 ℃, 820 ℃ and 840 ℃, respectively and then held for a few minutes, followed by different cooling modes such as slow cooling, rapid cooling, simulated galvanizing, and air cooling to room temperature. Microstructure observation by SEM sho...
Abstract: Based on the characteristics and formation of the Mg-treated inclusions in non-quenched and tempered steel, the misfit degrees of MgAl2O4+MnS was calculated to reveal the best growth surface and main action forces between the MgAl2O4 inclusions. For Mg free steel, the sulfide in slab edge mainly pre...
Abstract: OM and SEM were used to observe the microstructure of GH4065A under two solidification modes: normal pressure and pressure (under 2 MPa) to analyze the effect of high pressure on the structure. The results show that the as-cast GH4065A structure under normal pressure has a large number of loose shri...
Abstract: A pearlite steel was prepared via laboratory steelmaking, and then after rolling and heat treatment to obtain two different samples with different pearlite lamellar spacing. The mechanical properties and microstructures of the materials were observed by scanning electron microscopy and universal tes...
Abstract: To simulate the influence of oxygen deficient and air conditions on the scale formation in the production process, the experimental steel was heated in 1150 ℃ and 1200 ℃ with oxygen content of 3% and 21% by tubular furnace to study the scale formation. The cross-section morphology of the scale was o...
Abstract: In this paper, the industrial practice of deep dephosphorization with less slag in dephosphorization period was carried out on 250 ton converter of Meigang. The effects of smelting temperature, slag composition and blowing system on phosphorus content in molten steel were studied. The practice shows...
Abstract: The microstructure and mechanical properties of Mg-8Al-1Zn-xTi(x=0.05,0.15,0.3) magnesium alloy containing titanium with different titanium contents were tested and analyzed, and the microstructure and mechanical properties of Mg-8Al-1Zn alloy without titanium were compared. The results show that th...
Abstract: In this paper, the effects of environmental factors, loading mode, workpiece geometry and technological treatment on fatigue behavior of notched parts are summarized, and the methods of fatigue life analysis of notched parts and the technological methods of strengthening fatigue performance of notch...
