vanadium titanium magnetite dri direct reduced iron

The thermodynamic analysis on gas - based reduction of vanadium‑titanium magnetite indicates that the vanadium‑titanium magnetite is more difficult to be reduced than ordinary iron ore, and the hydrogen-rich reducing gas was recommended [ 13 ].

Vanadium titanomagnetite ore has prominent latent applications in the recovery of iron, vanadium and titanium. In this study, the reduction effect and product characteristics of vanadium titanomagnetite ore using hydrogen as reductant under fluidized bed conditions were investigated by X-ray diffraction, scanning electron microscopy and energy dispersive …

The invention discloses a process for producing direct reduced iron powder by using coke oven gas for reducing titanic magnetite tailings. The process is characterized by including the steps: (1) raw material proportioning and pelletizing; (2) drying and heat treatment; (3) reducing; (4) magnetic separation. Balls preheated by the step (2) are placed into reduction equipment for …

new process to treat vanadium–titanium magnetite ore, which extracts V 2O 5 and then treats vanadium tailings to obtain iron and titanium. Compared with other processes, the ''vanadium extraction–iron recovery'' process has higher vanadium recovery rate and lower energy con-sumption. Direct reduction–magnetic separation technique

The results show that,when the vanadium-titanium magnetite is reduced at 1 050 ℃ for 100 minutes,with the grinding fineness of- 0. 045 mm accounting for 84. 88% and 800 Gs magnetic field intensity,through the reduction-ball mill magnetic separation process,the grade of iron ore concentrate product is up to 90. 32%,and the iron recovery rate ...

Vanadium titanomagnetite (VTM) is a complex polymetallic iron ore that is widely used in steel manufacturing and advanced materials fields …

At first, the ore concentrate or direct reduced iron (DRI) is reduced to a hot metal with a V content in the range of 0.3-0.5 mass% [1][2][3][4]. ... The main methods of extracting vanadium from ...

1. Introduction. Vanadium (V) and titanium (Ti) are important strategic metals, which are widely used in metallurgical industry, chemical industry, machinery manufacturing, battery, aerospace, etc. [,,, ].As a representative resource for extracting V and Ti, vanadium–titanium magnetite (VTM) is a polymetallic symbiotic mineral which primarily …

Chen L, Zhang X, Liu X et al (2017) Discussion on direct reduction process of vanadium-titanium magnetite. Appl Chem Ind 46(1):150–153. Google Scholar Wang Z, Chen S, Chu M et al (2012) Simulation experiment on direct reduction of oxidized pellets of vanadium and titanium-bearing iron concentrates by gas-based shaft furnace.

Direct reduced iron (DRI), also called sponge iron, is produced from the direct reduction of iron ore (in the form of lumps, pellets, or fines) into iron by a reducing gas or elemental carbon produced from natural gas or coal.Many ores are suitable for direct reduction. Direct reduction refers to solid-state processes which reduce iron oxides to metallic iron at temperatures …

The invention relates to a direct-reduction multi-gradient extraction technology for vanadium-titanium magnetite concentrate. The direct-reduction multi-gradient extraction technology comprises the following steps: 1) ball pressing, to be specific, selecting and grinding iron mine powder and coal powder, uniformly mixing the iron mine powder with the coal powder …

A novel process for preparing direct reduction iron (DRI) and titanium nitride (TiN) from Panzhihua titanomagnetite concentrate is proposed. This process involves pelletizing, direct reduction roasting and magnetic separation. The effects of reduction temperature, coal dosage and reduction time on the phase transformation of composite pellets were investigated by X …

Quick and direct reduction process of vanadium and titanium iron concentrate with carbon-containing pellets at high temperature April 2011 Chongqing Daxue Xuebao/Journal of Chongqing University 34 ...

The reduction behavior of a new type of blast furnace burden named vanadium‑titanium magnetite carbon composite hot briquette (hereinafter abbreviated as VTM-CCB), including fraction of reaction (f), reduction shrinking, crushing strength after reduction, phase transformation of valuable elements, and softening-melting-dripping …

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The optimal conditions for the reduction of vanadium‑titanium magnetite were determined as reduction temperature of 850 °C, H2 concentration of 80%, reduction time of 30 min and gas flow rate of 900 mL·min −1. Under the above optimal conditions, a reduced product with a metallization degree of 91.30% was obtained.

The direct reduction iron containing 94.95% iron and 0.75% TiO2, titanium concentrate assaying 31.10% TiO2 were produced under optimal conditions, and metal recovery for both products exceeded 80%.

To obtained high titanium slag and so as to improve the comprehensive value of sea sand ore, we used smelting reduction technology and all vanadium-titanium magnetite iron ore in the experiments. Under the condition of different temperatures and raw materials, the reduction rate constant was calculated between 0.01–0.04 g(Fe)/(cm2•min•kg(slag)), and the activation …

An innovative method for recovering valuable elements from vanadium-bearing titanomagnetite is proposed. This method involves two procedures:low-temperature roasting of vanadium-bearing titanomagnetite and water leaching of roasting slag. During the roasting process, the reduction of iron oxides to metallic iron, the sodium oxidation of vanadium …

iron processing Britannica . Jan 8 2010 Iron processing use of a smelting process to turn the ore into a form from Direct reduction in which iron ores are reduced at temperatures below Pure magnetite contains 72 4 percent iron hematite 69 9 percent Gangue remains in the spongelike product known as direct reduced iron or DRI and

There are several processes for direct reduction of iron ore, principally gas-based shaft furnaces (Midrex and ENERGIRON processes), accounting for 76% and coal based rotary kiln furnaces (mainly in India) accounting for 24% of 2019 production (108.1 million tonnes). Direct Reduced Iron is produced either in pellet/lump form (DRI, designated as ...