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A method and device for improving the particle size of high-chromium and low-iron vanadium fine slag

A technology for iron vanadium slag and high chromium is applied in the field of vanadium extraction from vanadium slag, which can solve the problems of inability to meet the requirements for roasting production of vanadium fine slag, high production and operation cost of vanadium pentoxide, low roasting conversion rate and output, etc. Soda ash utilization rate, good roasting effect, and the effect of reducing soda ash consumption

Active Publication Date: 2022-06-21
CITIC JINZHOU METAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to high chromium and low iron vanadium slag, low metallic iron content, high chromium content, and friable characteristics, in the process of preparing vanadium slag, it is ground by ball mill and iron is selected by magnetic separator to obtain the vanadium slag particle size (120 Mesh sieve) accounted for generally only 60%-70%, vanadium fine slag particle size is relatively coarse, can not meet the particle size of 120-140 mesh sieve 80%-90% requirements, vanadium fine slag into the kiln through additive oxidation, Sodium roasting, the vanadium conversion rate is low and the output is small, resulting in high production and operation costs of vanadium pentoxide and high roasting energy consumption
Therefore, the disadvantages of the vanadium slag made of high chromium and low iron vanadium slag are: the abrasive control of the ball mill is simple, the particle size of the vanadium slag is relatively coarse, which cannot meet the production requirements of vanadium slag roasting, and the roasting conversion rate and output are low

Method used

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  • A method and device for improving the particle size of high-chromium and low-iron vanadium fine slag
  • A method and device for improving the particle size of high-chromium and low-iron vanadium fine slag
  • A method and device for improving the particle size of high-chromium and low-iron vanadium fine slag

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] As shown in the figure, the device for improving the particle size of high-chromium and low-iron vanadium fine slag includes a silo 1, and a disc feeder 2 is provided below the discharging chute at the bottom of the silo 1. The disc feeder 2 The unloading chute is connected with the ball mill 3 through pipes, and the silo of the ball mill 3 is provided with a partition board 301 to separate the silo into a coarse silo 302 and a fine silo 303, and the partition board 301 is evenly distributed with 30mm×18mm strips. The discharge hole 301a has a lifting end 3003 on the side of the fine bin 303 of the ball mill 3, and a grate 3003a with a diameter of 5mm×10mm is arranged on the lifting end 3003 of the ball mill 3. The bottom of 303 is provided with a discharge chute, the lifting end 3003 of the ball mill 3 is connected with a hopper I4 through a pipeline, and the discharge chute of the ball mill 3 is connected with a magnetic separator 5 through the magnetic separator 5 fee...

Embodiment 2

[0045] The device for improving the particle size of the high-chromium, low-iron vanadium fine slag is the same as in Example 1.

[0046] The operation process of increasing the proportion of 140 mesh undersize fine slag with high chromium and low iron vanadium is as follows:

[0047] (1) The low chromium high iron vanadium slag, the chromium content (in terms of Cr 2 O 3 total) 1.5%wt, metallic iron content 15%wt, add to silo 1, pass through disc feeder 2, add ball mill 3 coarse silo 302 at one time, filling factor 30%, add chromium-containing silo 302 to ball mill 3 coarse silo 302 20% wt steel ball, steel ball with a diameter of 120mm accounting for 20% of the mass, and 80mm accounting for 80% of the mass. After 48 hours of continuous grinding, the iron-containing vanadium slag is discharged, and the irregular-shaped steel block is prefabricated as the grinding body;

[0048] (2) adding 20% ​​wt steel balls containing chromium to the coarse warehouse 302 of the ball mill ...

Embodiment 3

[0053] The device for improving the particle size of the high-chromium, low-iron vanadium fine slag is the same as in Example 1.

[0054] The operation process of increasing the proportion of 140 mesh undersize fine slag with high chromium and low iron vanadium is as follows:

[0055] (1) The low chromium high iron vanadium slag, the chromium content (in terms of Cr 2 O 3 total) 3.1%wt, metallic iron content of 20%wt, added to silo 1, passed through disc feeder 2, added to ball mill 3 coarse silo 302 at one time, filling factor 22%, added chromium-containing silo 302 to ball mill 3 coarse silo 302 20% wt steel ball, steel ball diameter 120mm, 30% by mass, 80mm, 70% by mass, after 48 hours of continuous grinding, the iron-containing vanadium slag is discharged, and the irregular-shaped steel block is prefabricated as the grinding body;

[0056] (2) adding 20% ​​wt steel balls containing chromium to the coarse warehouse 302 of the ball mill 3, the diameter of the steel balls i...

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Abstract

A method and device for increasing the granularity of high-chromium, low-iron and vanadium slag. Low-chromium, high-iron and vanadium slag is added to a silo, and an irregular-shaped steel block formed by low-chromium, high-iron and vanadium slag is obtained by ball milling through a disc feeder as a grinding body. Add steel balls to the rough bin of the ball mill, add high-chromium and low-iron vanadium slag and soda ash into the bin, and continuously add them into the rough bin of the ball mill through a disc feeder; The particles and powder obtained by the joint ball milling of the grinding bodies enter the fine chamber of the ball mill through the compartment plate; add steel balls into the fine chamber of the ball mill, continue the ball milling, and then magnetically separate and sieve to obtain high chromium and low iron vanadium fine slag. The operation is easy, the process is reasonable, the grinding time is short, the particle size of the vanadium concentrate is fine, the proportion of the 140-mesh sieve is increased, the roasting effect of the vanadium concentrate is good, the conversion rate of vanadium is high, the output is large, and it has low cost and high benefit.

Description

technical field [0001] The invention belongs to the field of vanadium extraction from vanadium slag, and particularly relates to a method and a device for improving the particle size of high-chromium and low-iron vanadium fine slag. Background technique [0002] Vanadium titanomagnetite is smelted into vanadium-containing molten iron by blast furnace, and oxidized and blown in converter. After enrichment, vanadium enters the slag phase to obtain vanadium slag. , the high-chromium and low-iron vanadium slag after vanadium titanomagnetite smelting, its chromium content (in terms of Cr 2 O 3 Calculation) up to 8.0%-15%, and the metallic iron content is less than 10%. In the process of producing vanadium pentoxide with high-chromium and low-iron vanadium slag in domestic enterprises, the vanadium slag needs to be pretreated, ground and iron selected by a ball mill, so as to make vanadium fine slag. [0003] Due to the high chromium and low iron vanadium slag, the metal iron c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C17/10B02C17/20B02C17/18B02C23/14B02C23/02B03C1/02B07B1/28B07B1/46C22B34/22C22B7/04C22B1/00C22B1/02
CPCB02C17/10B02C17/20B02C17/183B02C23/14B03C1/02B07B1/28B07B1/46C22B7/04C22B34/22C22B1/005C22B1/02Y02P10/20
Inventor 王亮庄立军郭密云刘红耿磊周雁楠
Owner CITIC JINZHOU METAL
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