Abstract: For researching a more efficient vanadium extraction process,the processes of atmospheric pressure acid-leaching without roasting,none salt roasting with atmospheric pressure acid-leaching and oxygen pressure acid-leaching without roasting were researched.The results indicate that:During the atmosph...
Abstract: Vanadium and chromium respectively exist as V(V) and Cr(VI) in the waste water produced in the procedure of vanadium precipitation.It is a particularly significant issue to reduce the environmental pollution by the waste water and recover the valuable metals simultaneously.An anion exchange resin wa...
Abstract: V2O3 powder was prepared by hydrolyzing VOSO4 without adding reducing agent.The effects of atmosphere and temperature on the sintering behavior were studied.The products were analyzed by X-ray diffraction(XRD),scanning electron microscope(SEM) and laser particle size analyzer.The results show that d...
Abstract: According to the technology problems of the intermediate channels blockage in distillation process and the over standard of chloridion in products during the titanium sponge production by magnesium thermal reduction,the optimizations of system pressure,temperature and time in distillation process we...
Abstract: TiO2 microspheres with different morphology were synthesized by a simple hydrothermal method.The as-prepared samples were characterized by X-ray diffraction(XRD),scanning electron microscope(SEM).The photocatalytic activities of the samples for methyl orange degradation were studied.The results indi...
Abstract: Hexagram-shaped V2O3 nanoparticles were synthesized by annealing hexagram-shaped NH4V3(OH)6(SO4)2 precursor prepared through hydrothermal method.Both the precursor and annealed samples were characterized,and the formation mechanism of hexagram-shaped nanostructure NH4V3(OH)6(SO4)2 was investigated b...
Abstract: Potassium metavanadate was prepared by ammonium polyvanadate(APV).The effects of crystallization method and vanadium concentration on the compositions of potassium metavanadate were investigated.The results show that the incubation time is 15~20 h,the filtrate residue vanadium than 25 g/L under natu...
Abstract: The Ti-47.5Al-2.5V-1Cr-0.1Y alloy samples for automobile turbocharger were respectively prepared by common casting and two-step method,and the microstructures,mechanical properties,corrosion resistance and fatigue resistance for the samples by the 2 methods mentioned above were tested and contrastiv...
Abstract: This paper applied different process parameters for the study of electron beam rapid prototyping TC18 titanium alloy sheet and carried out the testing and comparative analysis of mechanical properties,high temperature oxidation resistance and corrosion resistance for the alloy.The results show that,...
Abstract: The chloride-containing tailings produced in the process of titanium extraction from high titanium blast furnace slag were analyzed.For achieving the non-hazardous treatment,the technologies of chloride removal for tailings after extracting titanium by washing and high-temperature calcination were i...
Abstract: Through multi-element analysis,XRD,SEM,microscopic analysis and other measurement methods,the process mineralogical studies on an ilmenite in Myanmar were carried out to identify the chemical composition,mineral composition,grain size distribution and dissemination characteristics of the ore.The fac...
Abstract: Vanadium has been widely used in long steel products such as forging grades,reinforcing bars,sections,tubes,rails,springs and wire rods.Vanadium is the preferred addition in long steel products because of the much higher solubility of its carbonitrides in austenite and lower sensitivity to carbon le...
Abstract: Production status and development trend of vanadium-bearing iron ore concentrate,vanadium slag,ferrovanadium and nitrovan in world in recent years are described.The production of vanadium product,product mix,financial results and trends for Evraz in Russia,Xstrata in Switzerland,Panzhihua Steel,Chen...
Abstract: Vanadium-titanium magnetite is characterized by high content of TiO2,low content of SiO2 and the resulting sinter is at low tumbler strength and RDI.In this paper a composite agglomeration process(CAP) was investigated and the resulting sinter performance was compared with conventional sintering pro...
Abstract: The composition and microstructure of vanadium-titanium sinters with different MgO contents were determined by means of polarization microscope.The result shows that,as MgO content increased,the microstructure transferred from melting corrosion to granular structure.Meanwhile,he content of metal pha...
Abstract: The technology of spraying sinter with CaCl2 can improve the RDI while impacts the metallurgy performance of other raw materials in blast furnace.In order to understand the influence of CaCl2 on RDI and weight loss rate of iron ore during their low temperature reduction process,the sinter and pellet...
Abstract: The effects of casting speed,width of mold,depth of submerged entry nozzle,nozzle port angle,and shape of port nozzle on the flow field and the surface flow fluctuation of the slab continuous caster from a steelmaking plant were investigated by means of a water model test with a radio of 1:1 for the...
Abstract: Based on the problem that slag-steel interface is strongly disturbed by the steel flow in steel impact zone thus leading to circumfluence and entrapping large inclusions into the pouring zone,installation of a slag wire in combination with original flow control devices in tundish was proposed.The ef...
Abstract: During the early stage of producing grade 20G steel,crack defects and macro-structure defects were frequently observed which were expected to decrease rolling qualified rate and yield.In order to solve the crack problem and to improve steel product quality,a thermodynamics method was used to determi...
Abstract: The viscosity and heat flux density of mold fluxes have a great impact on the quality of slab via continuous casting.Different casting mold powders used for low and medium carbon steels had been studied in term of their viscosity and heat flux density of at diferent temperatures through heat flux si...
Abstract: The modification mechanism of alumina,MgO·Al2O3 spinel and the condition of precipitation of calcium sulfide was thermodynamically analyzed in this paper.Thermodynamic calculations showed that in order to modify the alumina inclusions into liquid 12CaO·7Al2O3,20×10-6 content of calcium in steel was ...
Abstract: On the basis of similarity theory,a physical simulation system for 85 t ladle furnace had been established to simulate ladle bottom argon blowing process.The required mixing time for various position at different flow rate had been measured in order to determine the optimal location of bottom gas pe...
Abstract: T[O]and[N]and the type,source,quantity and composition of micro inclusions during the production route of O5 sheet steel(pre-desulfuration → BOF → ladle slag modifier → RH → CC) had been,analyzed.The results showed that T[O]is 25.67×10-6,[N]was27×10-6,and the number of micro-inclusions per mm2was 2....
Abstract: In order to effectively control liquid steel rephosphorization,the total rephosphorization quantity in liquid steel,by slag tapping,alloy additions、smelting fluxes had been calculated,and effect of tapping conditions on total rephosphorization and rephosphorization by slag was investigated in this p...
