Separating and Extracting of Vanadium and Titanium
Synthesis of porous bentonite modified titanium-lithium ion sieve precursor
Huang Chenghua, Li Yan, Zhang Jingjing, Shui Yi, Wu Na, Zhang Liyuan
2022, 43(3): 1-8.   doi: 10.7513/j.issn.1004-7638.2022.03.001
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The lithium titanate precursor sol was prepared by inorganic precipitation-peptization method with titanium sulfate as titanium source, lithium acetate as lithium source, followed by adding bentonite as modifier. Bentonite modified Li2TiO3 powder was obtained after stirring, aging, drying and calcination. The effects of molar ratio (R) of complexing agent H2O2 to Ti, calcination temperature, solid-liquid ratio of bentonite to sol on the surface morphology and crystal structure of precursor Li2TiO3 were studied. The samples were characterized by scanning electron microscopy, X-ray diffraction, thermogravimetry-differential scanning calorimetry and infrared spectroscopy. The results show that the crystal structure of unmodified Li2TiO3 is the most complete when calcined at 750 ℃ with R = 6. After the sample was modified by bentonite with a solid-liquid ratio of 1.67 g/L, the crystallinity of each crystal surface was the most complete when the calcination temperature was 750 ℃, and Li2TiO3 with uniform porous structure on the surface was obtained.
Application of Vanadium and Titanium
Study on vacuum electron beam welding process of 50 mm thick plate TC4 and TA17 titanium alloys
Li Dadong, Bai Wei, Deng Jian, Chen Rong, Geng Naitao
2022, 43(3): 40-46.   doi: 10.7513/j.issn.1004-7638.2022.03.007
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Based on the analysis of the density, specific heat and thermal conductivity of TC4 and TA17 titanium alloys by using JMATPRO thermodynamic software, the vacuum electron beam welding experiments of TC4 and TA17 titanium alloys with a thickness of 50 mm were carried out. The parameters of high and medium voltage accelerating voltage, different welding beam current and welding speed were designed. The effects of welding process parameters on weld width, penetration and weld forming coefficient were studied. The test results show that the penetration and weld forming coefficient of TC4 titanium alloy are higher than TA17 under the same welding process parameters. The influence of welding beam current on penetration and weld forming coefficient is the most prominent. The high voltage of accelerating voltage 150 kV is more suitable for vacuum electron beam welding of large and thick titanium alloys.
Mining & Beneficiation
Experimental study on optimization of flotation reagents for ilmenite froman iron dressing tailing in Panxi area
Deng Jian, Yang Yaohui, Wang Hongbin, Yan Weiping, Zeng Xiaobo
2022, 43(3): 77-83.   doi: 10.7513/j.issn.1004-7638.2022.03.013
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In this paper, the optimization test of ilmenite flotation reagents was carried out for an iron dressing tailing in Panxi. With a TiO2 grade of 16.6%, this tailing is mainly composed of ilmenite, titanomagnetite, pyroxene and olivine, and the secondary minerals are plagioclase and chlorite. The types and dosages of collectors, inhibitors and sulfuric acid were optimized. Using the combination of sulfuric acid, EMA and MOH, a five-time titanium concentration process was obtained, including iron removal by magnetic separation, flotation desulfurization, one rough selection and one sweep selection. Under the optimal conditions, a good index of titanium concentrate yield of 25.18%, TiO2 grade of 46.48% and recovery of 71.31% can be obtained in the closed circuit test, which provides a technical reference for the recovery of ilmenite from iron separation tailings in Panxi mining area.
Ferrous Metallurgy and Materials
Study on high temperature properties and optimal ore blending of Pangang iron ore powder
Hu Peng, Tang Wenbo, Huang Chu, Rao Jiating, Yang Mingrui
2022, 43(3): 118-124.   doi: 10.7513/j.issn.1004-7638.2022.03.019
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The results from micro sintering test on high temperature properties of Pangang iron ore power show that the assimilation temperature of high V-Ti magnetite used in Pangang exceeds 1 320 ℃, while the liquid phase fluidity index is only 0.1 and the bonding phase strength is greater than 3 500 N. It is necessary to improve the performance of sinter blending by optimizing ore blending. Therefore, the ore blending was optimized based on high temperature performance, and the sintering verification tests had been conducted. It is found out that the content of TiO2 has a great influence on the high temperature sintering properties of iron ore powder. When TiO2 content decreases from 7.0% down to 3.0%, the assimilation temperature of mixed ore decreases from 1 305 ℃ to 1 280 ℃, the liquid phase fluidity index is increased from 0.42 to 0.78, and the bonding phase strength decreases from 2 640 N to 1 915 N. The sinter yield, drum strength, and medium and low temperature properties are significantly improved. During the sintering process, the calcium titanium mineral phase with dense structure and high melting point formed by the reaction of TiO2 and CaO decreases, and the calcium ferrite phase increases.
Status of titanium dioxide industry in China and the development prospect
Bi Sheng
2021, 42(2): 1-4.   doi: 10.7513/j.issn.1004-7638.2021.02.001
[Abstract](153) [FullText HTML](50) [PDF 546KB](17)
Application of rutile nano titanium dioxide in coatings
Wu Jianchun
2021, 42(1): 43-49.   doi: 10.7513/j.issn.1004-7638.2021.01.007
[Abstract](128) [FullText HTML](4) [PDF 1313KB](2)
利用透射电镜(TEM)对纳米二氧化钛的形貌和粒度进行分析后,将纳米二氧化钛制成乳胶漆、汽车漆、家具漆和防腐漆,对其进行耐候性、随角异色等性能分析。结果表明,金红石纳米二氧化钛可大幅度提高乳胶漆的耐候性、耐水性、耐碱性和耐洗刷性能,可提高家具漆和防腐漆的耐候性;纳米二氧化钛和铝粉配合制成的汽车漆具有随角异色效果,二氧化钛的粒度对其随角异色性能有很大影响,平均粒径为280 nm的普通颜料钛白改性铝粉漆无随角异色效果,平均粒径为35 nm的纳米二氧化钛改性铝粉漆有显著的随角异色效果,并且随纳米二氧化钛加量的增加,其不同角度的颜色差异增大。
Current situation of resource utilization of waste acid from titanium dioxide production
Gao Guangyan, Gao Likun, Rao Bing, Wang Feiwang, Shen Hairong
2021, 42(5): 99-108.   doi: 10.7513/j.issn.1004-7638.2021.05.016
[Abstract](155) [FullText HTML](21) [PDF 1047KB](8)
Effect of TiO2 on physicochemical properties and structure of high-alumina blast furnace slag
Yan Hua, Liu Huajun, Chen Buxin, Hu Meilong
2022, 43(2): 118-124.   doi: 10.7513/j.issn.1004-7638.2022.02.018
[Abstract](7) [FullText HTML](0) [PDF 1822KB](1)
随着国内各钢铁企业高炉配加经济性较高的高铝原料的增加,炉渣中Al2O3含量增加,渣铁流动性变差,给高炉冶炼带来一系列问题。以CaO-SiO2-Al2O3-MgO-TiO2五元渣系为研究对象,通过相图理论计算结合试验研究和炉渣结构分析,研究了高铝渣中不同TiO2含量(低钛:5%,中钛:15%,高钛:25%)对高铝高炉渣黏度、熔化性温度的影响,并通过炉渣结构研究解析了影响炉渣物化性能的原因。结果表明:固定碱度R2为1.25,TiO2质量分数增加至25%过程中,炉渣熔化温度先下降后增高,当TiO2质量分数为7%时,炉渣液相析出相由斜长石类的钙铝硅酸盐(Ca2Al2SiO7)转变为高熔点钛酸钙(CaTiO3),其熔点为1975 ℃,炉渣熔化温度增加;TiO2含量由低钛5%增加至高钛25%时,炉渣黏度和熔化性温度均降低。温度越高,炉渣流动性越好,渣中TiO2以[TiO6]8-八面体结构存在,可使渣中复杂硅氧网状结构解体;TiO2含量由5%增加至25%时,炉渣中复杂结构单元Si(Q2 + Q3)的含量降低,简单结构单元Si(Q0 + Q1)的含量升高,Si(Q2 + Q3)/Si (Q0 + Q1)降低,炉渣结构简单化,即炉渣中无论是在低钛、中钛、还是高钛含量,TiO2在炉渣中起炉渣修饰子作用,对降低炉渣黏度、改善炉渣流动性有积极作用,可作为高铝冶炼调控手段之一。
Study on technology for preparation of high-purity vanadium pentoxide for aviation materials
Liu Chao, Li Haijun, Zhu Jianyan, Hu Zhiwei
2021, 42(1): 38-42.   doi: 10.7513/j.issn.1004-7638.2021.01.006
[Abstract](164) [FullText HTML](9) [PDF 1057KB](7)
Report on China titanium industry in 2020
Jia Hong, Lu Fusheng, Hao Bin
2021, 42(3): 1-9.   doi: 10.7513/j.issn.1004-7638.2021.03.001
[Abstract](409) [FullText HTML](183) [PDF 867KB](79)
Preparation and performance optimization of Co-doped high-titanium blast furnace slag as photocatalytic material
Huo Hongying, Zou Min
2021, 42(1): 65-69.   doi: 10.7513/j.issn.1004-7638.2021.01.011
[Abstract](106) [FullText HTML](1) [PDF 886KB](1)
为了实现以非提钛方法对高钛型高炉渣的综合利用,利用其含TiO2可制备光催化剂的特点,以攀钢高钛型高炉渣掺杂硝酸钴为原料,采用液相法掺杂并烧结制备掺杂Co的光催化剂,在紫外光下,考察了煅烧温度、掺杂量及煅烧时间对模拟污染物亚甲基蓝溶液降解率的影响。结果表明:在煅烧温度600 ℃、Co-Ti质量掺杂比(w(Co): w(Ti))0.03、煅烧时间2 h时,制备的掺杂Co光催化剂降解率达到89.0%,比未掺杂之前提高了32.4%。
Review on research progress of high purity vanadium pentoxide preparation by chlorination process
Li Zhuochen, Du Guangchao, Fan Chuanlin, Zhu Qingshan
2021, 42(1): 8-15, 92.   doi: 10.7513/j.issn.1004-7638.2021.01.002
[Abstract](206) [FullText HTML](16) [PDF 1143KB](20)
Effect of ESR on oxygen content and inclusions in GCr15 bearing steel
Chang Kaihua, Xu Tao, Zhu Chunli, Zhang Longfei, Su Yunlong, Shi Xiaofang, Chang Lizhong
2021, 42(4): 175-181.   doi: 10.7513/j.issn.1004-7638.2021.04.029
[Abstract](125) [FullText HTML](5) [PDF 1339KB](7)
Analysis on split-head cracking of Y1Cr13 stainless rolled bar
Wu Liangping, Sun Han, Xie Jianbo, Wu Xiangyu, Fu Jianxun
2021, 42(1): 176-183.   doi: 10.7513/j.issn.1004-7638.2021.01.029
[Abstract](121) [FullText HTML](2) [PDF 1764KB](2)
Report on China titanium industry in 2020
Jia Hong, Lu Fusheng, Hao Bin
2021, 42(3): 1-9.   doi: 10.7513/j.issn.1004-7638.2021.03.001
[Abstract](409) [FullText HTML](183) [PDF 867KB](183)
The overall situation of China titanium industry was analyzed in basis of the production capacity, application and import & export amount of titanium concentrate, titanium sponge, titanium ingot and titanium materials in 2020. The existed problems and the corresponding suggestions were also proposed.
Global vanadium industry development report 2020
Wu You, Chen Donghui, Liu Wuhan, Sun Zhaohui, Zhang Bangxu
2021, 42(5): 1-9.   doi: 10.7513/j.issn.1004-7638.2021.05.001
[Abstract](274) [FullText HTML](36) [PDF 1046KB](36)

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-nitrogen (VN) alloys in 2020. The major events in the global vanadium battery field are also introduced. Based on the current operating situation of the vanadium industry at home and abroad, the outlook for the market is forecasted, and it is believed that the global vanadium expansion situation will not be greatly changed in the short term, and the oversupply will bring about the price fluctuation of vanadium products in the specific range. The Chinese market under the background of “efforts to achieve carbon peak and neutrality goals” is still the main focus for global vanadium demand, and VN alloys will also be the trend of vanadium products in the near and mid-term. Collaborative innovation between vanadium enterprises will promote the vanadium industry to gradually show a positive “competition and cooperation” situation.