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Vanadium slag treatment method and system

A technology of vanadium slag and vanadium precipitation, which is applied in the field of extraction of valuable metals in vanadium slag, can solve the problems of waste of iron resources, no consideration of iron recovery, etc., achieves improved recovery rate, is suitable for continuous large-scale production, and is easy to implement Effect

Inactive Publication Date: 2016-11-02
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In summary, although various methods are used in the prior art to process vanadium slag, none of them considers the recovery of iron, resulting in a waste of iron resources

Method used

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  • Vanadium slag treatment method and system

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Effect test

Embodiment 1

[0039] Embodiment 1 handles the method for vanadium slag

[0040] The vanadium slag (containing 35% of total iron and 16% of vanadium pentoxide) of a vanadium extraction and steelmaking plant in China was subjected to oxidation and magnetization roasting treatment in a rotary kiln at a temperature of 300°C, an oxygen concentration of 0.5%, and a roasting time of 5 minutes to obtain magnetic roasting Sand, wherein the iron in the ferroferric oxide accounts for 92% of the total iron, and the magnetic calcine is magnetically separated in a magnetic separation device (magnetic separator) to obtain magnetic ferroferric oxide and vanadium-rich slag, and the iron is recovered Rate 90%. Vanadium-rich slag and sodium carbonate (analytically pure, content 99.5%) are mixed according to the weight ratio of vanadium-rich slag:sodium carbonate=100:15, and the mixture is added to a tunnel kiln for sodium oxide roasting and smelting at a temperature of 800°C , the roasting time is 1.5h, and ...

Embodiment 2

[0041] Embodiment 2 handles the method for vanadium slag

[0042] The vanadium slag (containing 42% of total iron and 20% of vanadium pentoxide) of a vanadium extraction steelmaking plant in China was subjected to oxidation and magnetization roasting treatment in a rotary hearth furnace at a temperature of 400°C, an oxygen concentration of 1%, and a roasting time of 10 minutes to obtain magnetic Calcined sand, wherein the iron in ferroferric oxide accounts for 90% of the total iron, and magnetically separates the magnetic calcined sand in a magnetic separation device (magnetic separator) to obtain magnetic ferroferric oxide and vanadium-rich slag, iron The recovery rate was 92%. Vanadium-rich slag and sodium carbonate (analytically pure, content 99.5%) are mixed according to the weight ratio of vanadium-rich slag:sodium carbonate=100:20, and the mixture is added to the rotary kiln for sodium oxide roasting and smelting at 700°C , the roasting time is 2h, and the water-soluble...

Embodiment 3

[0043] Embodiment 3 handles the method for vanadium slag

[0044] The vanadium slag (containing 25% of total iron and 14% of vanadium pentoxide) from a vanadium extraction and steelmaking plant in China was oxidized and magnetized roasted in a rotary hearth furnace at a temperature of 500°C, an oxygen concentration of 1.5%, and a roasting time of 15 minutes to obtain a magnetic Calcin, wherein the iron in the ferroferric oxide accounts for 94% of the total iron, and the magnetic calcine is magnetically separated in a magnetic separation device (magnetic separation tube) to obtain magnetic ferric ferric oxide and vanadium-rich slag, iron The recovery rate is 95%. Vanadium-rich slag and sodium carbonate (analytically pure, content 99.5%) are mixed according to the weight ratio of vanadium-rich slag:sodium carbonate=100:30, and the mixture is added to the rotary kiln for sodium oxide roasting and smelting at a temperature of 600°C , the roasting time is 1h, and the water-soluble...

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Abstract

The invention discloses a vanadium slag treatment method and a system, which belong to the field of valuable metal extraction of vanadium slags. The invention discloses the vanadium slag treatment method first. The vanadium slag treatment method comprises the steps of performing oxidizing and magnetizing roasting on the vanadium slags first, so that iron in the vanadium slags is converted into magnetic ferroferric oxide for magnetic separation to recover, and vanadium in the vanadium slags in which the iron is recovered is enriched, so as to obtain nonmagnetic vanadium-enriched slags; mixing sodium salt with the vanadium-enriched slags, and recovering vanadium in the vanadium-enriched slags by using an oxidizing and salt roasting and vanadium water leaching method, so that the iron and the vanadium in the vanadium slags are extracted step by step. The invention further discloses the system for implementing the vanadium slag treatment method. The system comprises an oxidizing and magnetizing roasting device, a magnetic separation device, an oxidizing and salt roasting device, a vanadium water leaching device and a vanadium precipitation and calcination device. According to the vanadium slag treatment method and the system, the recovery rate of the iron and the vanadium the vanadium slags is high, and the comprehensive utilization of the vanadium slags is realized.

Description

technical field [0001] The present invention relates to a method for treating vanadium slag, in particular to a method for extracting valuable elements iron and vanadium from vanadium slag, and also relates to a system for implementing the method, which belongs to the valuable metal Extract fields. Background technique [0002] Vanadium has good plasticity and can be rolled into sheets, foils and drawn wires at room temperature, and has elasticity and ductility at a certain temperature. Vanadium has high impact value, good weldability and heat transfer, and has good corrosion resistance to seawater, alkaline solution, organic acid and inorganic acid. It can be used as structural material and chemical container of ship, seamless thin film Materials for wall pipes, etc. [0003] Vanadium slag refers to a kind of slag that is rich in vanadium oxide and iron oxide after blowing and oxidation of vanadium-containing molten iron. Vanadium slag is made of MFe, FeO, SiO 2 , V 2 ...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B1/02C22B34/22
CPCC22B1/02C22B7/006C22B7/04C22B34/22Y02P10/20
Inventor 宋文臣王静静李红科曹志成薛逊吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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