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Method for recycling vanadium, chromium, titanium and iron from vanadium-titanium magnetite ore

A technology for vanadium-titanium magnetite and vanadium-titanium-magnetite, which is applied in the fields of iron, chromium, high-titanium chromium-type vanadium-titanium magnetite or concentrate for comprehensive recovery and utilization of vanadium and titanium, can solve the problem of inability to extract chromium and the like, and achieves the Conducive to the leaching rate, economical, and the effect of improving the recovery rate

Active Publication Date: 2011-05-18
SICHUAN LOMON MINING & METALLURGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Another purpose of the present invention is to overcome the defect that the existing technologies such as patent 200710202813.7 can only recover vanadium, titanium, iron, and cannot extract chromium, and there is no need for two balls at all, and the separation of iron and titanium does not need to be reduced in a rotary hearth furnace first and then Separation in the electric furnace significantly simplifies the process flow, reduces energy consumption and production costs

Method used

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  • Method for recycling vanadium, chromium, titanium and iron from vanadium-titanium magnetite ore
  • Method for recycling vanadium, chromium, titanium and iron from vanadium-titanium magnetite ore

Examples

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Embodiment 1

[0036] Grind Panzhihua Hongge vanadium-titanium magnetite iron concentrate to powder, wherein -200 mesh accounts for 80%, and the concentrate contains (weight percent, %wt): TFe56.7, TiO 2 12.9, V 2 o 5 0.58, Cr 2 o 3 1.11, take 1000g of ground concentrate, add 80g of sodium carbonate, 20g of sodium nitrate, oxidize and roast in the rotary kiln at 900°C-1000°C for 2.5-3 hours, and leaching the clinker with hot water at 80°C, the liquid-solid ratio is 5 : 1, the leaching solution after purification is precipitated by the ammonium salt vanadium precipitation method to produce ammonium polyvanadate, and after calcining, vanadium pentoxide is obtained; the recovery rate of vanadium is 83%. After vanadium precipitation, the raffinate is reduced with sodium sulfide, the pH value is adjusted to be alkaline, chromium hydroxide is precipitated, and chromium trioxide is obtained after calcining, and the recovery rate of chromium is 76%. The weight of leaching residue is 1050g, conta...

Embodiment 2

[0038] Grinding Panzhihua Hongge vanadium-titanium magnetite iron concentrate to -200 mesh accounts for 70%, and the concentrate contains (weight percent, %wt): TFe55.2, TiO 2 13.1,V 2 o 5 0.58, Cr 2 o 3 0.87, take 10Kg of ground concentrate, add 0.9Kg of sodium carbonate, 0.1Kg of sodium nitrate, oxidize and roast in a rotary kiln at 1000-1100°C for 2 hours, clinker is leached with hot water at 70°C, and the liquid-solid ratio is 5: 1. Precipitate ammonium polyvanadate from the purified leaching solution by ammonium salt vanadium precipitation method, and obtain vanadium pentoxide after calcination; the recovery rate of vanadium is 84.5%. After vanadium precipitation, the raffinate is reduced with sodium sulfide, the pH value is adjusted to be alkaline, chromium hydroxide is precipitated, and chromium trioxide is obtained after calcining, and the chromium recovery rate is 77.5%. The weight of leaching residue is 10.7Kg, containing TFe53.5%, TiO 2 13.0%, Na 2 O2.3%. The...

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Abstract

The invention discloses a method for recycling valuable elements from vanadium-titanium magnetite ore, which comprises the following steps of: crushing the ore or concentrate, adding sodium salt, performing oxidizing roasting, converting vanadium and chromium into water-soluble sodium vanadate and sodium chromate, performing water leaching in solution, and separating the vanadium and chromium from the solution to obtain vanadium pentoxide and chromium sesquioxide products; and adding coal dust into the leached residue for pelletizing, reducing in a rotary hearth furnace, magnetically separating iron and titanium, using the obtained magnetic iron powder as a raw material for powder metallurgy or steelmaking, and using a nonmagnetic product containing more than 50 percent of TiO2 as a raw material for extracting the titanium; or reducing iron from the leached residue in an electric furnace, using the obtained molten iron as a raw material for steelmaking and using electric furnace slag containing more than 50 percent of TiO2 as a raw material for extracting the titanium. The method is short in process flow and economical; and the recovery rate of the vanadium, chromium, titanium and iron is high.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and relates to a method for recovering vanadium, chromium, titanium and iron from vanadium-titanium magnetite, especially from high-titanium-chromium-type vanadium-titanium magnetite or concentrate containing chromium and titanium. A method for the comprehensive recovery and utilization of vanadium, chromium, titanium, and iron. Background technique [0002] There are huge reserves of vanadium-titanium magnetite in my country, especially in the Xichang area of ​​Panzhihua, Sichuan Province. , the reserves of vanadium and titanium associated in Panzhihua vanadium-titanium magnetite account for 63% and 91% of the country's total respectively, and some iron ores also contain symbiotic elements such as vanadium, chromium, titanium and iron. The reserves and ore types of Panxi vanadium-titanium magnetite are world-famous, and a variety of valuable elements associated with it are the supporting mate...

Claims

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Application Information

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IPC IPC(8): C22B34/22C22B34/32C22B34/12C21B13/00C22B1/02
CPCY02P10/20
Inventor 陈厚生杨绍利张声贵杨明飞李华彬俞勇胡晓范先国
Owner SICHUAN LOMON MINING & METALLURGY
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