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Sodium-translated roasting method of vanadium minerals

A technology for sodium roasting and minerals, applied in the field of metallurgy, can solve the problems of uneven production, difficult operation and high production cost, and achieve the effects of reduced production cost, broad application prospects and convenient operation.

Inactive Publication Date: 2012-07-25
SICHUAN CHUANWEI GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the traditional sodium roasting process at home and abroad has a low total vanadium content in the furnace (total vanadium content refers to the weight percentage of vanadium in vanadium minerals), generally <6%. If the total vanadium content in the furnace is increased, it is easy to cause rotation Balls and rings formed in the kiln, resulting in difficult operation and poor production
However, low total vanadium roasting has disadvantages such as low yield and high production cost.
Therefore, the sodium roasting process of high total vanadium (total vanadium content > 6%) roasting has become the focus of current research in this field, but so far, there is no relevant research on the use of high total vanadium (total vanadium content > 6%) roasting. to report

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1 adopts the method of the present invention to roast vanadium mineral

[0016] The vanadium slag is crushed and ball milled, and the passing rate of 120 meshes reaches 92%, and metallic iron is magnetically separated. The content of metallic iron in the refined vanadium slag is 1.78%, and 100 tons of complete refined slag (TV content: 8.56%), soda ash and The total weight of sodium chloride is formulated according to 10 tons, of which sodium chloride accounts for 3.0 tons; mix evenly in the mixer. Under aerobic conditions, the whole fine slag is put into the rotary kiln for high-temperature roasting, the roasting temperature is 750°C, and the roasting time is controlled at 4.5h; the oxygen content in the tail gas of the rotary kiln is detected to reach 12.5%.

[0017] The conversion rate of vanadium in this embodiment is 87.13%, and the rotary kiln does not have balls or rings during the roasting process.

Embodiment 2

[0018] Embodiment 2 adopts the method of the present invention to roast vanadium mineral

[0019] The vanadium slag is crushed and ball milled, and the passing rate of passing through 120 mesh reaches 86%, and the metallic iron is magnetically separated. The content of metallic iron in the refined vanadium slag is 1.69%, and the whole refined slag (TV content: 8.49%) is obtained, and the tailing slag is full of vanadium The content is 1.12%, and 40 tons of fine slag is mixed with 10 tons of tailings to ensure that the total vanadium after mixing is 7.0%; the total weight of soda ash and sodium chloride is 5.0 tons, of which sodium chloride accounts for 1.0 tons. Mix well in a blender. Under aerobic conditions, it will be roasted in a rotary kiln at a high temperature at 800°C, and the roasting time will be controlled at 4.0 hours; the oxygen content in the tail gas of the rotary kiln is detected to reach 11%.

[0020] The conversion rate of vanadium in this embodiment is 90.7...

Embodiment 3

[0021] Embodiment 3 adopts the method of the present invention to roast vanadium mineral

[0022] The vanadium slag is crushed and ball milled, and the passing rate of passing through 120 meshes reaches 87%. Metal iron is magnetically separated. The content of metal iron in the refined vanadium slag is 1.34%, and the whole refined slag (TV content: 8.64%) is obtained, and the tailing slag is full of vanadium The content is 1.12%, and 35 tons of fine slag is mixed with 15 tons of tailings to ensure that the total vanadium after mixing is 6.38%; the total weight of soda ash and sodium chloride is 5.0 tons, of which sodium chloride accounts for 1.5 tons. Mix well in a blender. Under aerobic conditions, it will be roasted in a rotary kiln at a high temperature at 900°C, and the roasting time will be controlled at 3.5 hours; the oxygen content in the tail gas of the rotary kiln will reach 12.5%.

[0023] The conversion rate of vanadium in this embodiment is 87.59%, and the rotary ...

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Abstract

The invention relates to a sodium-translated roasting method of vanadium minerals, belonging to the field of metallurgy and mainly aiming to solve the technical problem on providing a sodium-translated roasting method of vanadium minerals. The total vanadium content into a furnace in the method can reach more than 6%. The sodium-translated roasting method of the vanadium minerals comprises the following steps of: (a) mixing raw materials: pulverizing the vanadium minerals, removing metal iron, uniformly mixing sodium salt and the vanadium minerals with metal iron removed, wherein the weight of the sodium salt is 9-11% of the weight of the vanadium minerals with metal iron removed, and the sodium salt is at least one of NaCl, Na2SO4 and Na2CO3; and (b) roasting: roasting the mixed raw materials under aerobic conditions to obtain pentavalent salt of vanadium, wherein the roasting temperature is 700-900 DEG C, and the roasting time is 3.5-5.0 h. The method provides a new selection for the sodium-translated roasting of the vanadium minerals and has broad application prospects.

Description

technical field [0001] The invention relates to a sodium roasting method of vanadium minerals, which belongs to the field of metallurgy. Background technique [0002] Most vanadium minerals in nature are in the trivalent oxidation state, and some are symbiotic with other metal elements in the same quality. If they do not undergo reduction and oxidation processes such as ironmaking and steelmaking, they need to be roasted with sodium salt first to make The vanadium in the mineral is oxidized to a high-valent sodium salt compound, that is, it is transformed into a state that is easily soluble in water. [0003] At present, the traditional sodium roasting process at home and abroad has a low total vanadium content in the furnace (total vanadium content refers to the weight percentage of vanadium in the vanadium minerals), generally <6%. If the total vanadium content in the furnace is increased, it will easily lead to rotation Kiln balls and rings make operation difficult an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/02C22B34/22
Inventor 兰钢汪大成官仁权郭宝林
Owner SICHUAN CHUANWEI GRP CO LTD
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