Separating and Extracting of Vanadium and Titanium
Global vanadium industry development report 2022
Wu You, Chen Donghui, Liu Wuhan, Zhang Bangxu, He Rui
2023, 44(6): 1-8.   doi: 10.7513/j.issn.1004-7638.2023.06.001
Abstract(115) HTML(74) PDF(34)
Abstract:
The overall situation of vanadium industry in 2022 was elaborated and analyzed from the global vanadium resources and production capacity, the output, supply and demand, import and export, as well as the market prices. 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 industry will enter a new cycle of transformation and development, and China needs to scientifically, efficiently and orderly develop and utilize vanadium in key strategic metal mineral resources. Plan the green and low-carbon development path of vanadium industry in advance. In the next few years, China will still be the world’s largest vanadium supply and demand market, and the global vanadium market price will show a consolidation and regression trend within a certain range under the multi-factor regulation mechanism. Vanadium redox flow battery will become one of the important carriers to support the safe and stable application of new energy.
Application of Vanadium and Titanium
Research status and prospect of high-strength β-titanium alloy
Wang Andong, Xiang Zhilei, Zhou Zongyi, Ma Xiaozhao, Han Jingyu, Chen Ziyong
2023, 44(6): 46-57.   doi: 10.7513/j.issn.1004-7638.2023.06.007
Abstract(65) HTML(11) PDF(12)
Abstract:
For titanium alloys, the type and content of alloying elements have a great impact on the properties of the alloy. For β-titanium alloy, the main problem is how to select β-stable elements and control the addition of β-stable elements. In this paper, the influence of different alloyed elements on β-titanium alloy is reviewed, and the development process and current situation of high-strength β-titanium alloy at home and abroad are summarized. The American Ti-1023, β21-S, Russian BT22, Ti-5553 and Chinese Ti-5523 are mainly introduced. In addition, from the perspective of controlling the size, shape and type of the alloy phase by adding small size gap elements, the improvement of the strength of β-titanium alloy is prospected, in order to further improve the strength of β-titanium alloy. Finally, the difficulties encountered in the development of β-titanium alloy and the possible development direction of β-titanium alloy are summarized.
Resources Environment and Energy Saving
Experimental study on upgrading and flotation of titanium concentrate in a concentrator in Panxi area
Su Xin, Hu Houqin, Wang Hongbin
2023, 44(6): 88-92.   doi: 10.7513/j.issn.1004-7638.2023.06.013
Abstract(43) HTML(13) PDF(6)
Abstract:
The floating titanium concentrate grade of a concentrator in Panxi area is 46.84%, among which gangue minerals SiO2 and CaO are not conducive to the subsequent chlorination process of titanium dioxide. Adding inhibitors to acidified sodium silicate, sulfuric acid, sodium silicate, sodium fluorosilicate and lignin can effectively inhibit gangue minerals from floating and improve the grade of titanium concentrate, among which sulfuric acid and lignin show the best effect, and sulfuric acid is determined to be the quality improvement flotation inhibitor. The effects of stirring time, sulfuric acid dosage and collector dosage on the final grade and recovery of titanium concentrate were investigated by a single flotation process. The optimal flotation conditions were determined to be stirring time of 10 min, sulfuric acid dosage of 2000 g/t and MOH dosage of 2000 g/t. Under the optimal flotation conditions, the grade of titanium concentrate can be increased from 46.84% to 50.04%, the recovery rate of titanium concentrate is 41.93%, and the CaO+SiO2≤1.5%, which meets the quality improvement requirements.
Ferrous Metallurgy and Materials
Effect of particle size composition of iron ore fines on the suitable amount of bonding phase in sintering process
Fan Xinsheng, Du Yu, Guo Xingmin
2023, 44(6): 117-125.   doi: 10.7513/j.issn.1004-7638.2023.06.017
Abstract(42) HTML(13) PDF(5)
Abstract:
Calcium ferrite is main bonding phase in high-basicity sinter, its formation is closely related to the sinter quality, and the appropriate amount of bonding phase is also an important factor of energy saving and carbon reduction in the sintering process. In this work, mono-calcium ferrite (CF) as an initial bonding phase and pre-sintered hematite (Fe2O3) powder as iron ore fines were used to investigate the influence of particle size composition of iron ore fines on the appropriate amount of bonding phase in sintering process. The results show that the amount of bonding phase needed for obtaining the same compressive strength of sintered samples increases with the increase of iron ore fines size. At same particle size range of iron ore fines, the compressive strength increases first and then decreases with increase of CF addition, and its maximum value should be corresponding to the suitable amount of bonding phase. At different particle size range, the maximum compressive strength decreases with increase of iron ore fines size, simultaneous the suitable amount of bonding phase shiftes to the direction of increasing bonding phase amount. Besides, CF reacts with Fe2O3 to form a calcium rich-ferrate (Ca3.6Fe14.4O25.2) with the low melting point, increasing the amount of bonding phase in sintering process. The Ca3.6Fe14.4O25.2 formation as a new phase increases with the increase of CF addition and the decrease of iron ore fines size, which revealed the relationship of amount between actual bonding phase and initial one in sintering process.
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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](1093) [FullText HTML](795) [PDF 867KB](356)
摘要:
从2020年我国钛工业钛精矿、海绵钛、钛锭、钛材等品种的产能、产量、应用和进出口等数据分析了我国钛工业的整体情况,并对目前行业存在的问题提出了建议。
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](310) [FullText HTML](105) [PDF 546KB](131)
摘要:
总结回顾了中国钛白粉工业2019、2020年的各项行业数据和表现,分析了当前面临的形势及发展趋势,认为高质量发展成为钛白粉行业未来发展的主旋律,钛白粉产能集中度虽有提高,但洗牌效应短期内难以呈现,这也是行业发展的一个难题,另外行业监管、氯化法钛原料问题、环保及清洁生产问题仍不容忽视。
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](975) [FullText HTML](176) [PDF 1046KB](319)
摘要:

从2020年全球钒资源概况,五氧化二钒、偏钒酸铵、钒铁和钒氮合金等品种的产能、产量、需求、进出口贸易和市场价格等方面阐述和分析了钒工业的整体情况,并介绍了2020年全球钒电池领域发生的主要大事件。依据目前国内外钒行业运行态势对后市进行了展望,认为全球钒扩能态势短期内不会大改,钒产品供过于求的状态将促使价格呈现盘整回归态势。“双碳”背景下的中国市场依旧是全球钒需求的主场,钒氮合金亦将成为钒产品近中期的发展趋势,钒企间的协同创新将促进钒产业逐步呈现良性“竞合”局面。

Inclusion analysis in magnesium free-cutting steel
Zhu Qiangbin, Li Jie, Deng Xiangyang, Tian Qianren, Zeng Zhiqi, Fu Jianxun
2021, 42(2): 179-187, 192.   doi: 10.7513/j.issn.1004-7638.2021.02.029
[Abstract](205) [FullText HTML](39) [PDF 2017KB](73)
摘要:
为了探究Mg处理对易切削钢中夹杂物的影响,以1144高硫易切削钢为试验钢种,采用金相和能谱仪等手段研究了Mg处理对1144易切削钢中夹杂物的形态、尺寸分布和夹杂物成分的影响。结果表明:在易切削钢铸坯中,Mg处理使得易切削钢铸坯硫化物夹杂由Ⅱ类向Ⅲ类、Ⅰ类转变,分布更为均匀,同时使得复合硫化锰夹杂物比例提升。在轧材中,使得钢中夹杂物球化,并且钢中硫化锰夹杂物的尺寸和分布也得到了较好的改善,同时,Mg处理能够有效提高易切削钢的切削加工性能。
Study on microalloying and heat treatment process of spring steel 55SiCrV
Meng Jian
2021, 42(3): 187-192.   doi: 10.7513/j.issn.1004-7638.2021.03.028
[Abstract](238) [FullText HTML](30) [PDF 850KB](86)
摘要:
在弹簧钢55SiCr成分基础上进行钒微合金化处理,获得了55SiCrV,通过淬火+回火正交试验、显微组织观察、力学性能测试和X射线衍射等手段,研究并分析了淬火+回火工艺对弹簧钢55SiCrV微观组织和力学性能的影响,结果表明:0.20%V的添加可使55SiCrV组织中存在大量弥散均匀分布的10~35 nm含钒析出相,强化效果最佳。淬火+回火处理可以改变55SiCrV的显微组织比例,其中的残余奥氏体可以降低强度和增加塑性,55SiCrV获得最佳力学性能匹配(Rm=1 815 MPa、Z=28%)的热处理工艺为900 ℃淬火+430 ℃回火,对应其残余奥氏体含量为2.3%。
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](232) [FullText HTML](39) [PDF 1313KB](111)
摘要:
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。
Review of continue casting slab electromagnetic stirring technology
Yang Bao, Zhang Hui, Wang Minglin, Wang Xuebin, Liu Bin, Liu Shuai
2021, 42(5): 149-157.   doi: 10.7513/j.issn.1004-7638.2021.05.023
[Abstract](324) [FullText HTML](15) [PDF 966KB](65)
摘要:
简述了连铸板坯电磁搅拌技术的发展过程和现存问题,重点阐述了连铸板坯生产过程中结晶器内和二冷区电磁搅拌的工作原理和技术特点,对电磁搅拌器的安装位置进行了归纳,同时总结了板坯结晶器电磁搅拌和二冷区电磁搅拌的研究现状,探究了影响板坯电磁搅拌效果的因素及其主次关系,归纳了用于二冷区电磁搅拌支撑辊的作用及需继续探究的方向,分析了板坯电磁搅拌技术对铸坯内元素分布和等轴晶区间隙率的影响,为以后的板坯电磁搅拌研究者提供参考。
Current research status of advanced forming technology for high-performance titanium alloys
Li Junzhao, Sun Qingjie, Yu Hang
2021, 42(6): 17-27.   doi: 10.7513/j.issn.1004-7638.2021.06.002
[Abstract](453) [FullText HTML](92) [PDF 1729KB](127)
摘要:
主要介绍先进热成形技术、脉冲电流辅助成形技术和电磁辅助成形技术的特点,及其在钛合金薄壁板材成形中应用的研究进展。热成形是钛合金塑性加工应用最为普遍的成形工艺,利用高温下钛合金塑性变形软化的特征,能够实现复杂钛合金零件的成形。脉冲电流和电磁辅助成形技术目前尚未开展大规模的产业应用,其在高强度难成形材料的成形加工方面具有潜在应用前景。
Study on microstructure and properties of high aluminum dual phase steel 980DH with high formability
Zhou Li, Xue Renjie, Cao Xiao’en, Dong Mengyao
2022, 43(2): 186-191.   doi: 10.7513/j.issn.1004-7638.2022.02.028
[Abstract](93) [FullText HTML](9) [PDF 1978KB](22)
摘要:
采用相变淬火膨胀仪、连退热模拟试验机等开展高铝增强成形性双相钢980DH静态连续冷却转变、连续退火工艺对冷轧板组织、性能的影响规律研究。结果显示:冷却速率在5~10 ℃/s,只发生贝氏体相变;当冷速>15 ℃/s后,随着冷速的提高,贝氏体占比减少,马氏体含量增加;980DH钢基体组织主要为铁素体、马氏体和残余奥氏体;均热温度(780~800 ℃)×160 s、缓冷温度650~700 ℃、冷却速率50 ℃/s快冷至300 ℃,保温5 min时效处理后空冷至室温,可获得性能优异的CR550/980DH。研究结果对工业开发高级别DH钢具有指导意义。
Study on beneficiation process of a low grade ilmenite in Panxi
Yang Daoguang
2022, 43(3): 111-117.   doi: 10.7513/j.issn.1004-7638.2022.03.018
[Abstract](206) [FullText HTML](67) [PDF 720KB](30)
摘要:
某低品位钒钛磁铁矿,TiO2品位为6.15%,矿物组成复杂,为充分回收其中的钛铁矿,针对钛的赋存状态及粒级分布特点,制定了强磁磁选预抛尾、重选提质、细磨弱磁选除铁、反浮选脱硫与一粗一扫两精浮钛组合工艺流程,研究了磁感应强度、磁介质大小、脉动冲程、磨矿浓度、磨矿时间、浮选调整剂及捕收剂用量等的影响,在获得最优工艺条件的基础上,按“一段强磁抛尾—两段重选抛尾—磨矿—除铁—浮选”的工艺流程进行了闭路试验。试验获得了TiO2品位48.22%,回收率为35.19%的钛精矿。矿石中主要有用的矿物钛铁矿得到了有效的回收。
Development and analysis on 2022 titanium dioxide industry in China
Bi Sheng
2023, 44(1): 1-3.   doi: 10.7513/j.issn.1004-7638.2023.01.001
[Abstract](262) [FullText HTML](233) [PDF 608KB](233)
Abstract:
This paper summarizes and sorts the operational data of titanium dioxide industry in China in 2022, such as production capacity, yield, apparent market demand, production capacity distribution, etc., and focuses on analyzing the recent growth trend of titanium dioxide production capacity and the corresponding changes in the supply and demand relationship of titanium ore raw materials. It is pointed out that the yield and production capacity of titanium dioxide in 2022 will continue to maintain an increasing trend, and the concentration of production capacity will be further improved. At the same time, the further expansion of the scale of existing producers and the increase of joining projects outside the industry will lead to the shortage of titanium ore supply. In addition, with the rise of the green new energy battery material industry, a large number of iron phosphate or lithium iron phosphate project construction or preparation, will lead to the surge of titanium dioxide production capacity, aggravate the contradiction between titanium ore supply and demand; then the market prospects and industry outlook is worrying, all parties should pay close attention to and timely adjust.
Report on China titanium industry in 2022
An Zhongsheng, Chen Yan, Zhao Wei
2023, 44(3): 1-8.   doi: 10.7513/j.issn.1004-7638.2023.03.001
[Abstract](1168) [FullText HTML](207) [PDF 1967KB](207)
Abstract:
The overall situation of China titanium industry was analyzed on the basis of capacity, output, application, and import and export amount of titanium concentrate, titanium sponge, titanium ingot and titanium materials in 2022. The existed problems and the corresponding suggestions were also proposed.
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