Method for recovering vanadium ferrochrome from vanadium-chromium tailings

A technology of vanadium chromium tailings and vanadium chromium, which is applied in chemical instruments and methods, wet separation, solid separation, etc., can solve problems such as inability to beneficiate, and achieve the effect of low cost

Active Publication Date: 2019-12-20
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Patent CN201610564677 mixes vanadium extraction tailings into pulp, adds suitable collectors for foam flotation, and selectively adds dispersants, regulators, foaming agents and other agents during flotation to obtain foamy gypsum and the remaining pulp. Separately filter and dry to obtain gypsum and iron-rich materials, but not all gypsum and vanadium-chromium ferro-vanadium contained in the tailings of vanadium extraction can be separated by flotation, and most of them cannot be beneficiated

Method used

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  • Method for recovering vanadium ferrochrome from vanadium-chromium tailings
  • Method for recovering vanadium ferrochrome from vanadium-chromium tailings
  • Method for recovering vanadium ferrochrome from vanadium-chromium tailings

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Embodiment 1

[0039] A method for reclaiming ferrovanadium chromium from vanadium chromium tailings comprises the following steps:

[0040] (1) Digestion: the composition and mass percentage content are: Fe (总) 34.00%, S 3.40%, V 0.30%, Ti 10.25%, Cr 0.20%, Na 2 O 5.22% vanadium chromium tailings, most of S and Na 2 O is wrapped inside the vanadium-chromium tailings and does not dissolve in water. Grind the vanadium-chromium tailings until the particle size is less than 0.074mm, add lime with a diameter of 0.40mm or less and an appropriate amount of water. The quality of the three is the tailings 1000g, lime 50g, water 200g, stir and mix evenly in a mixer, maintain the temperature at 80°C by self-heating for 15min, and digest to obtain digested material;

[0041] (2) Expansion: Put the digested material in step (1) into the extruder and then close it. The process conditions in the extruder are controlled: the temperature is 230°C; the pressure in the extruder is 3.0MPa; Open the dischar...

Embodiment 2

[0046] A method for reclaiming ferrovanadium chromium from vanadium chromium tailings comprises the following steps:

[0047] (1) Digestion: the composition and mass percentage content are: Fe (总) 31.80%, S 6.00%, V 0.35%, Ti 5.15%, Cr 0.25%, Na 2 O 5.22% vanadium chromium tailings, most of S and Na 2 O is wrapped inside the vanadium-chromium tailings and does not dissolve in water. Grind the vanadium-chromium tailings until the particle size is less than 0.074mm, add lime with a diameter of 0.40mm or less and an appropriate amount of water. The quality of the three is the tailings 1000g, lime 100g, water 300g, stir and mix evenly in a mixer, maintain the temperature at 100°C by self-heating for 5min, and digest to obtain digested material;

[0048] (2) Expansion: Put the digested material in step (1) into the extruder and then close it. The process conditions in the extruder are controlled: the temperature is 180°C; the pressure in the extruder is 1.0MPa; Open the dischar...

Embodiment 3

[0051] A method for reclaiming ferrovanadium chromium from vanadium chromium tailings comprises the following steps:

[0052] (1) Digestion: the composition and mass percentage content are: Fe (总) 39.30%, S 2.70%, V 0.28%, Ti 10.25%, Cr 0.10%, Na 2 O 5.22% vanadium chromium tailings, most of S and Na 2 O is wrapped inside the vanadium-chromium tailings and does not dissolve in water. Grind the vanadium-chromium tailings until the particle size is less than 0.074mm, add lime with a diameter of 0.40mm or less and an appropriate amount of water. The quality of the three is the tailings 1000g, lime 50g, water 200g, stir and mix evenly in a mixer, maintain the temperature at 80°C by self-heating for 10min, and digest to obtain digested material;

[0053] (2) Expansion: Put the digested material in step (1) into the extruder and then close it. Control the process conditions in the extruder: temperature 150°C; pressure in the extruder 0.5MPa; Open the discharge port of the extrud...

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Abstract

The invention discloses a method for recovering vanadium ferrochrome from vanadium-chromium tailings. The method comprises the following steps of grinding vanadium-chromium tailings, adding lime and water, uniformly mixing, and uniformly mixing at 80-100 DEG C for 5-15 min to obtain a digestive material; adding the digesting material into a puffing machine to be sealed, keeping the temperature for10-30 min at the temperature 150-230 DEG C and the pressure 0.5-3.0MPa, opening a discharging port of the puffing machine, and obtaining the puffing material at the discharging port; the puffing material shaking table is subjected to one-time reselection to separate the light phase and the heavy phase, the vanadium ferrochrome is rich in heavy phase, sodium is removed by about 60% and sulfur is removed by about 90%, the vanadium chromium above 80% in the vanadium-chromium tailings can be recovered, and the sulfur is removed by about 90%; the light phase is discarded slag, and the soluble chromium (1.5mg / L, consistent with HJ / T 301-2007 chromium slag pollution treatment environmental protection technical specification) is contained. The method is simple in process and low in cost.

Description

technical field [0001] The invention relates to a method for recovering ferrovanadium chromium from vanadium chromium tailings, in particular to recovering ferrovanadium chromium from vanadium chromium tailings produced in the process of extracting vanadium and reducing the sodium content of vanadium chromite phase, belonging to the field of comprehensive utilization of waste residues and non-ferrous metal production. [0002] technical background [0003] The content of iron, vanadium and titanium in the south mining area of ​​Panzhihua Hongge Mine is equivalent to that of similar deposits in Panxi, especially the chromium content is much higher. 2 o 3 Its content is as high as about 1.0%. For the development and utilization of resources in the south mining area of ​​Hongge Mine, Panzhihua Iron and Steel has conducted in-depth research on it using new technology. Panzhihua Iron and Steel has developed two main technological routes with independent intellectual property rig...

Claims

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Application Information

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IPC IPC(8): B03B5/04
CPCB03B5/04
Inventor 朱云张想
Owner KUNMING UNIV OF SCI & TECH
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