Abstract: The fluidized leaching process of calcified vanadium slag clinker was studied in a particulate fluidized bed reactor. The particle size distribution of the clinker was determined and seven size fractions were divided for the experiments. The critical velocity and entrainment velocity of different si...
Abstract: In order to improve the leaching rate of vanadium and understand the liquid flow and solid distribution in the mechanical stirring tank for hydrometallurgical vanadium extraction, the software Fluent was used to establish the Euler-Euler model of multi-phase flow and the standard k-ε turbulence mode...
Abstract: As the toxicity of vanadium increases with increase of the valence and it causes increasing threaten to the environment, biochar was introduced to do harmless treatment for high-valence vanadium. The effects of dosage of biochar, reaction temperature, concentration of H2SO4 and reaction time on the ...
Abstract: The paper studied the phase transformation of titanium and the formation mechanism of calcium titanate during the simultaneous preparation of calcium titanate by direct reduction of iron from ilmenite coal-based embedding method, and clarified the influence of additives such as calcium carbonate dos...
Abstract: A low-grade ilmenite ore in Yunnan province contains only 5.67% titanium (TiO2), and most of Ti exists in ilmenite alone, occupying 83.56% of the total TiO2 in the ore. The rest of 16.44% Ti exists in magnetite and pyroxene in a homogeneous form, and the vein minerals mainly include quartz and chlor...
Abstract: BiVO4/BiOCl composite photocatalysts with different contents of Tb were prepared by liquid phase precipitation method, and the catalysts were characterized by XRD and EDS. The photocatalytic performance of the photocatalysts was evaluated by degradation of rhodamine B under irradiation of the simula...
Abstract: A method for establishing the constitutive model considering the flow softening was proposed. Isothermal uniaxial compression tests were performed on cylindrical specimens of Ti-6Al-4V at 750 ℃ to 950 ℃ and the strain rate of 0.1 s−1to 20 s−1. And the flow softening that the flow stress decreases wi...
Abstract: TiO2 nanomaterial was prepared by sol-gel method using nitric acid as the control agent. The obtained TiO2 nanomaterial is anatase and has defect structure, with the particle size below 5 nm. During the preparation of the material, the crystal growth complies the oriented attachment (OA) mechanism. ...
Abstract: Foam glass-ceramics was prepared by one step sintering method at 900 ℃, using high titanium blast furnace slag and waste glass powder as the main raw materials, with calcium carbonate and borax as the foaming agent and fluxing agent, respectively. The effects of Na3PO4·12H2O on the foam glass-cerami...
Abstract: The effect of annealing temperature on microstructure and properties of 6 mm Ti-0.3Mo-0.8Ni titanium sheet was studied. The results show that at 600～700 ℃, the recrystallization of α phase occurs and chain-like Ti2Ni particles are formed along the grain boundary, accompanying a decrease in the yield...
Abstract: Vanadium microalloyed steel 42CrMoVx (x=0, 0.1, 0.3, 0.5, 0.7, 0.9) for automobile parts was prepared. The effects of vanadium microalloying on tensile strength, wear resistance and corrosion resistance of the steel were analyzed. The results show that the tensile strength, wear resistance and corro...
Abstract: In order to reduce NOx emission and alleviate the environmental pollution from steel industry, a modified activated carbon adsorbent was prepared by impregnation with potassium carbonate (K2CO3). The effect of SO2 concentration on the adsorption of NO in sintering flue gas by the modified activated ...
Abstract: The feasibility and economic benefits for Panzhihua electric furnace steel slag powder which partially or wholly replaces the fly ash as the admixture of concrete were analyzed and studied. The high-titanium heavy slag concrete having the strength grade of C30 and C40 was prepared with electric furn...
Abstract: Aiming at the problems of large exhaust gas discharge and low waste heat utilization rate of the grate-kiln ring cooler, a waste gas cycle technology that recycles the hot waste gas from the transitional preheating section to the second section of the circular cooling machine, was proposed. Then the...
Abstract: Using vanadium-titanium magnetite tailings for preparation of geopolymer can not only reduce pollution of the tailings, but also realize the efficient utilization of the tailings. The geopolymer was prepared from vanadium-titanium magnetite tailings in Chengde by mechanical activation process. The e...
Abstract: In this paper, the numerical simulation of on particle movement and pulverized coal injection combustion duringin the coal coal-based reduction of titano-magnetite pellets in rotary kiln was carried out. The results show that there were delamination phenomenon and discrete pile phenomenon in the mov...
Abstract: In this paper, the vanadium titano-magnetite concentrate was used as the raw material, and the influence of different heating methods on the reduction process was systematically compared based on the direct reduction process. The results show that compared with traditional heating, microwave heating...
Abstract: The content, morphology and grain size of calcium ferrite, and the main binding mineral as well in sinter, play a key role in the quality of sinter. The mineral phase structure and calcium ferrite characteristics of high basicity sinter with different quality situation were studied systematically an...
Abstract: Taking a steel plant VD ladle furnace as research object and using commercial software ANSYS-Fluent, a 150 t ladle bottom-blown argon gas model was established to simulate different molten steel volumes and two argon-blowing ports with different argon-blowing volume. The flow field and velocity were...
Abstract: In order to address the problems of serious slag strips and breakout alarms in the process of high-aluminum steel continuous casting using calcium-aluminum-based mold flux, the comprehensive effect of B2O3 and CaF2 on the melting temperature, viscosity and crystalline properties were investigated. T...
Abstract: The as-cast microstructure of the samples from multiple locations of an ESR ingot of superalloy GH4065A had been characterised by SEM and DSC, and then evolution of microstructure and residual segregation index of the samples treated under a variety of designed homogenization schemes had been invest...
Abstract: The anti-seismic and fire-resistant 460 MPa construction steels with different Cr content were designed to analyze the microstructure, performance at room temperature and elevated temperature. Both 0.4%Cr and 0.8%Cr steels meet the standards of anti-seismic and fire-resistant steel, that is, yield r...
Abstract: The microhardness, microstructure, friction and wear behavior of pre-hardened plastic die steels NAK80 and S136 were studied. The results show that the microstructure of NAK80 steel consists of lath martensite and granular bainite, while that of S136 steel are ferrite matrix and fine carbides, and t...
Abstract: The corrosion behavior of two weathering steels, AYNH 420 and SQNH 420, was studied by using indoor accelerated corrosion tests, XRD analysis, and electrochemical methods. Weightlessness test was used to determine the corrosion rate of the two steels, and the corrosion kinetics of tow steels was stu...
Abstract: In this paper, the effect of titanium content on the microstructure and properties of non oriented electrical steel with different titanium content was studied by means of annealing furnace, transmission electron microscope, metallographic observation and magnetic property test. The results showed t...
Abstract: Trilaminar composite of Fe-6.5%Si alloy with 1.2 mm thickness and produced by coated casting combined with thermomechanical process had been rolled in temperature of 450～650℃. Microstructure of the composite plate after warm rolling had been observed, in the same time, its iron loss had been tested....
Abstract: To clarify the high temperature oxidation behavior of weathering steel Q235NH containing Si and Cr, the oxidation experiment of weathering steel Q235NH was carried out at 700 ～ 1 200 ℃. The composition of iron oxide scale was analyzed by optical microscope (OM),scanning electron microscope (SEM), en...
Abstract: Electroslag remelting has a positive effect on improving the purity of steel, but it will increase oxygen for low oxygen content steel. In this paper, GCr15 bearing steel was used as consumable electrode to study the variation of oxygen content and inclusions in bearing steel with different slag sys...
Abstract: A Gleeble-3500 thermal simulation testing machine was used to conduct thermal compression experiments on electron beam melting M35 high speed steel. The hot deformation behavior under the conditions of deformation temperature of 1 273～1 423 K and strain rate of 0.01～10 s−1 was established. The evolu...
