A promising method to recover spent V2O5–WO3/TiO2 catalyst: treatment by vanadium–titanium magnetite sintering process

2021 ◽  
Author(s):  
Hong-ming Long ◽  
Yu-dong Zhang ◽  
Tao Yang ◽  
Li-xin Qian ◽  
Zheng-wei Yu
Keyword(s):  
Promising Method ◽  
Sintering Process ◽  
Tio2 Catalyst ◽  
Vanadium Titanium ◽  
Titanium Magnetite

scholarly journals Experimental Study on Oxygen-Enriched Sintering of Vanadium-Titanium Magnetite

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Hao Liu ◽  
Yuelin Qin ◽  
Xinlong Wu ◽  
Bing Xie
Keyword(s):  
Low Temperature ◽  
Ignition Temperature ◽  
Oxygen Enrichment ◽  
Sintering Process ◽  
Temperature Reduction ◽  
Utilization Coefficient ◽  
Coefficient Increase ◽  
Vanadium Titanium ◽  
Titanium Magnetite ◽  
Low Temperature Reduction

The influences of various factors, such as oxygen enrichment time, oxygen enrichment load, and ignition temperature, on the technical indices and sintering performance in the vanadium-titanium magnetite sintering process are simulated using sinter pot experiments. The experiments are based on the field production parameters of a sintering trolley in a steel enterprise in southwest China. Prolonged oxygen enrichment time results in the gradual increase in vertical sintering speed, sintering utilization coefficient, sintered ore yield, sintered ore drum strength, and reductivity. However, the low-temperature reduction pulverability of the sintered ore deteriorates. Oxygen enrichment load increases from 0 m3/h to 2.9 m3/h, and yield increases by 1.1%, while the vertical sintering speed and utilization coefficient increase slightly. Sintered ore drum strength increases from 65.33% to 68.00%, antiwear index decreases to 0.47%, and low-temperature reduction pulverability decreases from 65.07% to 62.85%. The increased ignition temperature is beneficial to improve the drum strength and yield of the ore but reduces the vertical sintering speed and utilization coefficient. With the increase in ignition temperature, the low-temperature reduction pulverability tends to increase first and then decrease. Changes in oxygen time, oxygen enrichment load, and ignition temperature have no significant effects on the soft melting performance of the sintered ore.

Reduction behavior of vanadium-titanium magnetite carbon composite hot briquette in blast furnace process

2019 ◽  
Vol 342 ◽  
pp. 214-223 ◽  
Author(s):  
Wei Zhao ◽  
Mansheng Chu ◽  
Hongtao Wang ◽  
Zhenggen Liu ◽  
Jue Tang ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Carbon Composite ◽  
Blast Furnace Process ◽  
Reduction Behavior ◽  
Furnace Process ◽  
Vanadium Titanium ◽  
Titanium Magnetite

scholarly journals Coal-Based Reduction and Magnetic Separation Behavior of Low-Grade Vanadium-Titanium Magnetite Pellets

Minerals ◽  
2017 ◽  
Vol 7 (6) ◽  
pp. 86 ◽  
Author(s):  
Gongjin Cheng ◽  
Zixian Gao ◽  
Mengyang Lv ◽  
He Yang ◽  
Xiangxin Xue
Keyword(s):  
Magnetic Separation ◽  
Low Grade ◽  
Magnetite Pellets ◽  
Vanadium Titanium ◽  
Separation Behavior ◽  
Titanium Magnetite

Phases Transition and Consolidation Mechanism of High Chromium Vanadium-Titanium Magnetite Pellet by Oxidation Process

2016 ◽  
Vol 35 (7) ◽  
pp. 729-738
Author(s):  
Jue Tang ◽  
Man-sheng Chu ◽  
Cong Feng ◽  
Feng Li ◽  
Zheng-gen Liu
Keyword(s):  
Phase Transition ◽  
Oxidation Process ◽  
Consolidation Process ◽  
High Chromium ◽  
Oxidized Pellet ◽  
Three Stages ◽  
Roasting Temperature ◽  
Vanadium Titanium ◽  
Roasting Time ◽  
Titanium Magnetite

AbstractBased on the fundamental characteristics of high chromium vanadium-titanium magnetite (HCVTM), the effects of roasting temperature and roasting time on the phase transition and oxidation consolidation during the oxidation were investigated systematically. It was shown that the oxidation of HCVTM pellet was not a simple process but complex. With increasing roasting temperature and time, the compressive strength of oxidized pellet was improved. The phase transition during oxidation was hypothesized to proceed as follows: (1) Fe3O4 → Fe2O3; (2) Fe2.75Ti0.25O4 → Fe9TiO15 + FeTiO3 → Fe9TiO15 + Fe2Ti3O9; (3) Fe2VO4 → V2O3 → (Cr0.15V0.85)2O3; (4) FeCr2O4 → Cr2O3 → Cr1.3Fe0.7O3 + (Cr0.15V0.85)2O3. The oxidation consolidation process was divided into three stages: (1)oxidation below 1,173 K; (2) recrystallization consolidation at 1,173 – 1,373 K; (3) particle refining recrystallization-consolidation by the participation of liquid phase at 1,373 – 1,573 K. To obtain the HCVTM oxidized pellet with good quality, the rational roasting parameters included a roasting temperature of 1,573 K and a roasting time of 20 min.

Study on Cold-Pressing Technology for Mixture of Iron Ore and Coal

2011 ◽  
Vol 117-119 ◽  
pp. 882-886
Author(s):  
Jie Qin ◽  
Gong Guo Liu ◽  
Fei Hu Long
Keyword(s):  
High Pressure ◽  
Industrial Production ◽  
Iron Ore ◽  
Cold Pressing ◽  
Comprehensive Utilization ◽  
Vanadium Titanium ◽  
Titanium Magnetite ◽  
Pressing Technology

Operation principle of high-pressure briquetter is introduced. According to the problems arised from real production in pilot named as comprehensive utilization of vanadium-titanium magnetite, countermeasures have been proposed to solve these problems. At the base of carrying out a series of reformations on the equipments and now the high-pressure briquetter can meet the requirements of industrial production.

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