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Recovery of titanium,aluminum,magnesium and separating silicon from titanium-bearing blast furnace slag by sulfuric acid curing-leaching

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International Journal of Minerals,Metallurgy and Materials 2022年第9期29卷 1705-1714页

作者： Long Wang Liang Chen Weizao Liu Guoquan Zhang Shengwei Tang Hairong Yue Bin Liang Dongmei Luo College of Chemical Engineering Sichuan UniversityChengdu 610065China College of Materials Science and Engineering Chongqing UniversityChongqing 400044China

An energy-efficient route was adopted to treat titanium-bearing blast furnace slag(TBBFS)in this ***,aluminum,and magnesium were simultaneously extracted and silicon was separated by low temperature sulfuric acid curing and low concentration sulfuric acid *** process parameters of sulfuric acid curing TBBFS were systematically *** the optimal conditions,the recovery of titanium,aluminum,and magnesium reached 85.96%,81.17%,and 93.82%,*** rapid leaching model was used to limit the dissolution and polymerization of silicon,and the dissolution of silicon was only 3.18%.The mechanism of sulfuric acid curing-leaching was *** the curing process,the reaction occurred rapidly and released heat *** the attack of hydrogen ions,the structure of TBBFS was destroyed,silicate was depolymerized to form filterable silica,and titanium,magnesium,aluminum,and calcium ions were replaced to form sulfates and enriched on the surface of silica ***,aluminum,and magnesium were recovered in the leaching solution,and calcium sulfate and silica were enriched in the residue after *** method could effectively avoid the formation of silica sol during the leaching process and accelerate the solid-liquid separation.

关键词： titanium-bearing blast furnace slag sulfuric acid curing silicon mechanism

Simultaneous preparation of TiO2 and ammonium alum,and microporous SiO2 during the mineral carbonation of titanium-bearing blast furnace slag

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Chinese Journal of Chemical Engineering 2020年第9期28卷 2256-2266页

作者： Yingjie Xiong Tahani Aldahri Weizao Liu Guanrun Chu Guoquan Zhang Dongmei Luo Hairong Yue Bin Liang Chun Li School of Chemical Engineering Sichuan UniversityChengdu 610065China Department of Chemical and Biochemical Engineering Western UniversityLondonOntarioCanada Department of physics Taibah UniversityMadinahSaudi Arabia

In this study,a route for simultaneous mineralization of CO2 and production of titanium dioxide and ammonium alum,and microporous silicon dioxide from titanium-bearing blast furnace slag(TBBF slag)was proposed,which is comprised of(NH4)2 S04 roasting,acid leaching,ammonium alum crystallization,silicic acid flocculation and Ti *** effects of relevant process parameters were systematically *** re sults showed that under the optimal roasting and leaching conditions about 85%of titanium and 84.6%of aluminum could be extracted while only 30%of silicon entered the leachate.84%of Al^3+was crystallized from the leachate in the form of ammonium aluminum sulfate dodecahydrate with a purity up to 99.5 wt%.About 85%of the soluble silicic acid was flocculated with the aid of secondary alcohol polyoxyethylene ether 9(AEO-9)to yield a microporous SiO2 material(97.4 wt%)from the crystallized mother *** Al-and Si-depleted solution was then hydrolyzed to generate a titanium dioxide(99.1 wt%)with uniform particle size *** was figured out that approximately 146 kg TiO2 could be produced from 1000 kg of TBBF ***,the improved process is a promising method for industrial application.

关键词： CO2 mineralization titanium-bearing blast furnace slag Ammonium sulfate Flocculation titanium dioxide

Preparation,characterization and photocatalytic activity of sulfuric acid-modified titanium-bearing blast furnace slag

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Transactions of Nonferrous Metals Society of China 2010年第12期20卷 2294-2298页

作者：雷雪飞薛向欣 Department of Materials Science and Engineering Northeastern University of Qinhuangdao School of Materials and Metallurgy Northeastern University

The feasibility of reducing Cr(VI)from the aqueous solution by sulfuric acid-modified titanium-bearing blast furnace slag(SATBBFS)as a photocatalyst was *** photocatalysts were examined by X-ray diffraction(XRD),UV-vis diffuse reflectance spectra,thermogravimetric analysis(TG)and Fourier transform infrared spectroscopy(FTIR).The photocatalytic activities of the different catalysts were evaluated by the photocatalytic reduction of Cr(VI)under UV-vis light *** results show that the photocatalytic activities of SATBBFS catalysts are strongly dependent on CaTiO3-to-TiO2 mass ratio,adsorption capacity and surface acidity,and SATBBFS calcined at 400°C shows a higher photocatalytic activity compared with other catalysts.

关键词： titanium-bearing blast furnace slag doping photocatalytic reduction Cr(VI)

Antibacterial Properties of V-doped titanium-bearing blast furnace slag Prepared at Different Calcination Temperatures

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过程工程学报 2010年第5期10卷 1025-1029页

作者：王辉杨合薛向欣刘东 School of Materials and Metallurgy Northeastern University

Perovskite-type V-doped titanium-bearing blast furnace slag (VTBBFS) photocatalyst was prepared by high-temperature solid phase *** influence of calcination temperature on the photocatalytic and antibacterial properties of VTBBFS was studied in *** composition and microstructure were evaluated by X-ray diffractometer,ultraviolet-visible absorption spectrometer,Fourier transform infrared spectrometer and scanning electron *** antibacterial properties of VTBBFS to Candida albicans were investigated by flask oscillation *** results showed that the optical absorption and antibacterial properties of VTBBFS were the best with 10%(ω) doping of vanadium,prepared at 800℃ for 2 h,and its sterilization rate was close to 100% to Candida albicans (ATCC10231).The minimum inhibitory and minimum bactericidal concentrations were 25 and 50 mg/*** the concentration was 0.2 μg/mL,the catalyst had the least toxic toxicity.

关键词： V doping titanium-bearing blast furnace slag photocatalyst antibacterial activity calcination temperature

Synthesis of Foliar Fertilizer and Ca-S-Si Compound Fertilizer from titanium-bearing blast furnace slag

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Journal of Environmental Science and Engineering 2010年第2期4卷 30-36页

作者： Y. Zhang, X.X. Xue H. Yang Box 313 Northeastern University Shenyang Liaoning 110004 China

With titanium-bearing blast furnace slag, ammonium sulfate, citric acid and potassium carbonate as raw materials to produce foliar fertilizer and Ca-S-Si compound fertilizer by means of heating process for the first time, which improved the solubility of the slag and converted the nutritional elements into such ones which are prone to be absorbed by plants. The effects of process conditions on dissolution rate of titanium were mainly analyzed through the orthogonal experiment. The results showed that the optimum synthesis process conditions of foliar fertilizer from the slag were 360 ℃ for 35 min, the mass ratio of ammonium sulfate and titanium-bearing blast furnace slag was 8：1. Under these conditions more than 80% of iron, titanium, magnesium and part of silicon in titanium-bearing blast furnace slag converted into water-soluble substances and existing in foliar fertilizer. Foliar fertilizer contained nitrogen, sulfur, potassium, iron, titanium, magnesium and silicon, and pH value of foliar fertilizer was 6. Ca-S-Si compound fertilizer mainly contained calcium silicate and calcium sulfate, which existed in the form of citric acid-soluble substance and slightly soluble substance, respectively.

关键词： titanium-bearing blast furnace slag foliar fertilizer nutritional elements dissolution rate

Determination of dielectric properties of titanium carbide fabricated by microwave synthesis with Ti-bearing blast furnace slag

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International Journal of Minerals,Metallurgy and Materials 2021年第1期28卷 88-97页

作者： Peng Liu Li-bo Zhang Bing-guo Liu Guang-jun He Jin-hui Peng Meng-yang Huang State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming University of Science and TechnologyKunming 650093China Yunnan Provincial Key Laboratory of Intensification Metallurgy Kunming 650093China National Local Joint Laboratory of Engineering Application of Microwave Energy and Equipment Technology Kunming 650093China Faculty of Metallurgical and Energy Engineering Kunming University of Science and TechnologyKunming 650093China Faculty of Science Kunming University of Science and TechnologyKunming 650500China Yunnan Energy Research Institute Co. Ltd.Kunming 650093China

The preparation of functional material titanium carbide by the carbothermal reduction of Ti-bearing blast furnace slag with microwave heating is an effective method for valuable metals recovery;it can alleviate the environmental pressure caused by slag *** dynamic dielectric parameters of Ti-bearing blast furnace slag/pulverized coal mixture under high-temperature heating are measured by the cylindrical resonant cavity perturbation *** the transient dipole and large π bond delocalization polarization phenomena, the interaction mechanism of the microwave macroscopic non-thermal effect on the titanium carbide synthesis reaction was *** material thickness range during microwave heating was optimized by the joint analysis of penetration depth and reflection loss, which is of great significance to the design of the microwave reactor for the carbothermal reduction of Ti-bearing blast furnace slag.

关键词： titanium-bearing blast furnace slag dielectric mechanism penetration depth reflection loss microwave heating efficiency