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Method for separating iron, vanadium and titanium from vanadium-titanium magnetite

A technology for separating vanadium titanomagnetite and iron, applied in the fields of titanium, separating iron and vanadium, can solve the problems of complex separation process, and achieve the effects of simple process, high metal recovery rate and high resource utilization rate

Active Publication Date: 2015-11-04
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Abstract
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Problems solved by technology

[0005] The Chinese patent with application number 201010188625.7 proposes adding sodium salt to vanadium-titanium magnetite for oxidative roasting, then leaching to extract vanadium and chromium, then reducing the leaching residue and separating iron and titanium by magnetic separation, which can realize iron, vanadium, chromium, For the separation of titanium, the metal recovery rate is high, but the separation process is more complicated

Method used

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  • Method for separating iron, vanadium and titanium from vanadium-titanium magnetite

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Experimental program
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Effect test

Embodiment 1

[0064] Add 20% sodium sulfate, 12% coal powder and 1% bentonite to the vanadium-titanium magnetite in Table 1, mix and pelletize, dry and roast in a muffle furnace at 1100°C for 30 minutes, water quench the obtained calcined sand, and Hot ball milling for 30 minutes, solid-liquid ratio of 1:3, filtering to obtain vanadium leaching solution and vanadium leaching slag, and magnetically separating the vanadium leaching slag under a magnetic field strength of 0.1T to obtain iron concentrate powder and titanium-rich tailings.

[0065] The obtained iron fine powder contains 71.3% iron, the iron recovery rate is 88.6%, and the titanium-rich tailings contain TiO 2 39.8%, titanium yield 89.5%, vanadium leaching rate 58.2%.

Embodiment 2

[0067] Add 15% sodium carbonate, 9% coal powder and 1% bentonite to the vanadium-titanium magnetite in Table 1, mix and make pellets, dry and roast in a muffle furnace at 1150°C for 60 minutes, water quench the obtained calcined sand, and Hot ball milling for 30 minutes, solid-liquid ratio of 1:5, filtering to obtain vanadium leaching solution and vanadium leaching slag, and magnetic separation to separate vanadium leaching slag under a magnetic field strength of 0.2T to obtain iron concentrate powder and titanium-rich tailings.

[0068] The obtained iron fine powder contains 79.6% iron, the iron recovery rate is 95.7%, and the titanium-rich tailings contain TiO 2 50.5%, titanium yield 93.0%, vanadium leaching rate 89.8%.

Embodiment 3

[0070] Add 10% sodium hydroxide, 9% coal powder and 1% bentonite to the vanadium-titanium magnetite in Table 1, mix and make pellets, dry and roast in a muffle furnace at 900°C for 90 minutes, and water quench the obtained calcined sand. Leach for 60 minutes by ball milling while hot, with a solid-to-liquid ratio of 1:8, filter to obtain the vanadium leaching solution and vanadium leaching slag, and magnetically separate the vanadium leaching slag under a magnetic field strength of 0.15T to obtain iron concentrate powder and titanium-rich tailings.

[0071] The obtained iron fine powder contains 75.5% iron, the iron recovery rate is 90.4%, and the titanium-rich tailings contain TiO 2 41.5%, titanium yield 91.2%, vanadium leaching rate 91.1%.

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Abstract

The invention discloses a method for separating iron, vanadium and titanium from vanadium-titanium magnetite. The method includes the steps that firstly, after the vanadium-titanium magnetite is smashed, an additive and / or reductant and an adhesive are added, and a pellet or a briquette is prepared; secondly, reduction roasting, water quenching, ball grinding and leaching are conducted on the pellet or the briquette; thirdly, after solid-liquid separation is conducted, vanadium soaking liquid and soaking slag are obtained, magnetic separating continues to be conducted on the soaking slag, and fine powdered iron and titanium-rich tailings are obtained; and fifthly, size mixing, vanadium precipitation and solid-liquid separation can continue to be conducted on the vanadium soaking liquid, and therefore sodium salt and ammonium vanadate are obtained. The method is simple in technology, low in energy consumption and high in metal recovery rate; and in addition, resources are reasonably used in the separation process, sodium salt and ammonia gas which are obtained through separation are effectively utilized, and the resource utilization rate of the whole separation process is high.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and relates to reduction roasting, chemical leaching and magnetic separation processes, in particular to a method for separating iron, vanadium and titanium from vanadium-titanium magnetite. Background technique [0002] Vanadium-titanium magnetite is an important mineral resource in my country, and it is the main raw material for the production of vanadium-titanium materials in China. At present, blast furnace smelting is the main utilization method of vanadium-titanium magnetite. In this method, vanadium enters molten iron and is oxidized and blown to form vanadium slag for vanadium extraction. The resulting semi-steel is used for steelmaking, while titanium enters blast furnace slag and is difficult to utilize. The comprehensive utilization rate of resources is low. Therefore, new methods to improve the utilization rate of vanadium and titanium resources need to be developed urgently. [0...

Claims

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Application Information

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IPC IPC(8): C22B1/14C22B1/02C22B3/04C22B34/22
Inventor 曾冠武郝建璋黎建明文永才
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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