Roasting-leaching method of fine vanadium slags

A roasting and vanadium slag technology, applied in the metallurgical field, can solve problems such as environmental pollution and inability to meet the requirements of environmental protection

Active Publication Date: 2011-10-19
CHINA ENFI ENGINEERING CORPORATION
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  • Abstract
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Problems solved by technology

[0003] However, the traditional preparation method of vanadium pentoxide is seriously polluting the environment. As the country's environmental protection requi

Method used

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  • Roasting-leaching method of fine vanadium slags
  • Roasting-leaching method of fine vanadium slags
  • Roasting-leaching method of fine vanadium slags

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preparation example Construction

[0040] Preparation of fine vanadium slag

[0041] refer to figure 1 , according to an embodiment of the present invention, the method for preparing fine vanadium slag from raw material vanadium slag comprises the following steps:

[0042] like figure 1 As shown, first, the raw vanadium slag is crushed, and then iron is magnetically separated to obtain iron slag and vanadium slag after iron selection. According to the embodiment of the present invention, the raw vanadium slag used in the present invention is not particularly limited, and may be any material containing vanadium. According to a specific example of the present invention, the raw vanadium slag is the "slag" of vanadium-titanium magnetite after steelmaking, thus, vanadium can be recovered from waste materials, reducing industrial costs. The applicant found that vanadium-titanium magnetite The calcium content of the "slag" after steelmaking is low (the content of calcium oxide is less than 3.5% by weight), so the obt

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Abstract

The invention provides a roasting-leaching method of fine vanadium slags. The roasting-leaching method includes the following steps: providing the fine vanadium slags; adding sodium carbonate in the fine vanadium slags to obtain roast mixture; roasting the roast mixture at the temperature of 700-850 DEG C to obtain a roast material containing sodium vanadate; water-quenching the roast material to under 100 DEG C; ball-milling the roast material after water quenching to obtain sizing agent; water-leaching the sizing agent to obtain leach sizing agent; and filtering the obtained leach sizing agent to obtain filter residue and lixivium containing the sodium vanadate. The roasting-leaching method at least has one of the following advantages: high efficiency, low cost, low energy consumption, safety and environment-friendly property.

Description

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Claims

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Application Information

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Owner CHINA ENFI ENGINEERING CORPORATION
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