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Pretreatment method for raw vanadium slag in vanadium extracting process

A technology for pretreatment and vanadium slag, which is applied in the field of vanadium extraction, can solve problems such as easy agglomeration, uneven batching of pelletized materials, and influence on roasting conversion rate, and achieve low cost, good social and economic benefits, and solve sticky roasting knot effect

Inactive Publication Date: 2018-03-20
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
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  • Claims
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Problems solved by technology

When this method is carried out in a completely ideal state, the expected effect can be achieved. However, the above method is to add roasting additives and binders to water first. In the process of wet mixing, because the solution is very viscous, the mixing process is easy to form agglomerates , resulting in uneven batching of pelletized materials, which affects the conversion rate of roasting

Method used

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  • Pretreatment method for raw vanadium slag in vanadium extracting process

Examples

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Embodiment 1

[0049] Embodiment 1 adopts the method of the present invention to carry out sodiumization roasting after the raw material vanadium slag is pretreated

[0050] Take 100g of refined vanadium slag (-120 mesh, 83.74% w / w), add 25g of anhydrous analytically pure sodium carbonate, and then add 2g of corn dextrin binder, put it into a 500ml mixer, and dry mix for 120min. Get 6ml of water and spray evenly in the mixture to obtain wet mixture. Using a die with a diameter of 10mm, press the wet mixture into a 3mm sheet under a pressure device of 5MPa. Baked at 100°C for 60 minutes to a moisture content of 0.25% w / w, placed in a muffle furnace, oxidized and roasted at 800°C for 120 minutes, and finally obtained vanadium slag oxidized and sodiumized roasted clinker. After testing, there is no bonding in roasting, clinker TV=7.42%, SV (content of water-soluble vanadium)=6.68%, and the roasting conversion rate of vanadium is 90.03%.

Embodiment 2

[0051] Example 2 Carry out calcification and roasting after the method of the present invention is used to pretreat the raw material vanadium slag

[0052] Take 100g of refined vanadium slag (83.74% w / w of -120 mesh), add 10g of anhydrous analytically pure calcium oxide, then add 10g of cellulose binder, put it into a 500ml mixer, and dry mix for 120min. Get 6ml of water and spray evenly in the mixture to obtain wet mixture. Using a die with a diameter of 10mm, press the wet mixture into a 5mm sheet under a pressure device of 10MPa. Baking at 200°C for 50 minutes to a moisture content of 0.14% w / w, placing it in a muffle furnace, oxidizing and roasting at 980°C for 120 minutes, and finally obtaining vanadium slag calcification roasting clinker. After testing, there is no caking in roasting, clinker TV=8.35%, V5+(+5-valent vanadium content)=7.46%, and the roasting conversion rate of vanadium is 89.33%.

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Abstract

The invention relates to a pretreatment method for raw vanadium slag in a vanadium extracting process, and belongs to the technical field of vanadium extraction. The pretreatment method for the raw vanadium slag in the vanadium extracting process comprises the following steps of a, crushing the vanadium slag; b, performing dry mixing, specifically, uniformly mixing the crushed powder obtained in the step a with a roasting additive and a solid binder; c, performing wet mixing, specifically, uniformly wetting the mixture obtained in the step b by adding water; d, carrying out pressing molding, specifically, carrying out pressing molding on the materials obtained in the step c; and e, carrying out drying. By adopting the method for pretreatment of vanadium extraction raw materials, the uniformity of the materials before roasting can be greatly improved, and the problems of roasting binding, low treatment efficiency, low conversion rate and the like are solved.

Description

technical field [0001] The invention relates to a pretreatment method for raw material vanadium slag in a vanadium extraction process, and belongs to the technical field of vanadium extraction. Background technique [0002] In the process of extracting vanadium from vanadium slag (including vanadium slag sodiumization, calcification vanadium extraction, vanadium chromium slag extraction vanadium chromium), no matter adopt calcification roasting or sodium roasting, due to some unstable heat (such as metal The release of iron oxidation) and the formation of low-melting point substances. Roasting often has problems such as material bonding, poor furnace conditions, difficulty in continuous operation, high processing intensity, low roasting conversion rate, and the need to add inert return materials. [0003] CN103898315A discloses a method for roasting pelletized vanadium slag, the method comprising the following steps: a. adding sodium salt additives and binders into water to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/00C22B34/22
CPCC22B1/00C22B34/22
Inventor 高官金殷兆迁蒋霖郭继科
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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