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Method for increasing leaching rate of navajoite under navajoite kiln roasting condition

A vanadium ore roasting technology, applied in the field of improving the vanadium ore leaching rate, can solve the problems of low leaching rate, unreasonable proportion, uneven particle size of green pellets, etc., and achieve the effect of improving the leaching rate

Inactive Publication Date: 2011-10-05
LIAONING CHENGUANG FERRO ALLOYS GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the raw ore powder and auxiliary materials (Na 2 CO 3 and NaCl) ratio is unreasonable, NaCl content is too much, resulting in Na 2 CO 3 Agglomeration, raw ore powder particle size is uneven, roasting humidity is around 650°C, raw pellet particle size is uneven, resulting in inconsistent quality of cooked pellets, resulting in low transfer leaching rate, only 55%

Method used

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  • Method for increasing leaching rate of navajoite under navajoite kiln roasting condition
  • Method for increasing leaching rate of navajoite under navajoite kiln roasting condition
  • Method for increasing leaching rate of navajoite under navajoite kiln roasting condition

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Experimental program
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Effect test

Embodiment 1

[0018] As shown in the figure, with NaCl and Na 2 CO 3 Put it into the auxiliary material bin as auxiliary materials, and put vanadium ore powder as raw material into the raw material bin, wherein the vanadium ore powder with a particle size of 2 CO 3 Accurately measure 10 parts of NaCl, Na 2 CO 3 3 parts are sent to the main belt conveyor; the raw materials and auxiliary materials enter the mixer set at the front end of the main belt conveyor through the main belt conveyor for mixing, and after mixing, they are sent to the buffer bin, and then sent to the ball forming machine through the buffer bin, and after being balled Machine-made raw balls, each of the described mixing machine and the ball forming machine is one. After being sieved by the sieving machine, the green balls with a diameter of 8-13mm are transported to the flat kiln, and the green balls with a diameter of 13mm are returned to the mixer; the green balls entering the flat kiln are roasted and roasted. The ...

Embodiment 2

[0020] As shown in the figure, with NaCl and Na 2 CO 3 Put the auxiliary material into the auxiliary material warehouse, and put the vanadium ore powder as the raw material into the raw material warehouse, wherein the vanadium ore powder with a particle size of 2 CO 3 Accurately measure 8 parts of NaCl, Na 2 CO 3 4 parts are sent to the main belt conveyor; the raw and auxiliary materials enter the mixer set at the front end of the main belt conveyor through the main belt conveyor for mixing, and after mixing, they are sent to the buffer bin, and then sent to the ball forming machine through the buffer bin, and after being balled Machine-made raw balls, each of the described mixing machine and the ball forming machine is one. After being sieved by the sieving machine, the green balls with a diameter of 8-13mm are transported to the flat kiln, and the green balls with a diameter of 13mm are returned to the mixer; the green balls entering the flat kiln are roasted and roasted...

Embodiment 3

[0022] As shown in the figure, with NaCl and Na 2 CO 3 Put it into the auxiliary material warehouse as an auxiliary material, and put it into the raw material warehouse with vanadium ore powder as raw material, wherein the vanadium ore powder with a particle size of 2 CO 3 Accurately measure 8-10 parts of NaCl, Na 2 CO 3 3-4 parts are sent to the main belt conveyor; the raw and auxiliary materials enter the mixer set at the front end of the main belt conveyor through the main belt conveyor for mixing. The ball forming machine produces raw balls, and each of the mixer and the ball forming machine is one. After being sieved by the sieving machine, the green balls with a diameter of 8-13mm are transported to the flat kiln, and the green balls with a diameter of 13mm are returned to the mixer; the green balls entering the flat kiln are roasted and roasted. The temperature is 700°C, and the temperature is kept for 2.5 hours to obtain the finished ball, and the leaching rate is...

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Abstract

The invention discloses a method for increasing the leaching rate of navajoite under the navajoite kiln roasting condition, which is characterized in that NaCl and Na2CO3 are used as the auxiliary material, vanadium powder is used as the raw material, wherein the vanadium powder with the particle size less than 0.074mm accounts for 70-80 percent of the vanadium powder weight; 8-10 portions of NaCl, 3-4 portions of NaCO3, and 100 portions of vanadium powder are sent by weight portion to a material mixer for mixing, the carbon content of the vanadium powder is of 8-10 portions; green balls are generated by a ball forming mill; after being sieved, the green balls with diameter of 8-13 mm are conveyed to the kiln, the green balls with diameter smaller than 8 mm and larger than 13 mm are sent back to the material mixer; the green balls entering the kiln are roasted at the temperature of 650-750 DEG C. and maintained at the temperature for 2-3 hours, then, the finished balls are produced. The invention has the advantages that through the improvement of the process condition, the roasting temperature can be increased to 700 DEG C. more or less, the carbon content in the mixed material and the Na2CO3 content in the auxiliary material are controlled, the particle size of the vanadium powder (table 4) and the particle diameter of the green ball (table 2) are controlled; the experiment proves that the leaching rate of the vanadium can be increased to over 75 percent, even to the highest rate of 82 percent.

Description

technical field [0001] The invention relates to a method for increasing the conversion rate of vanadium ore under the condition of vanadium ore roasting in a flat kiln. Background technique [0002] The vanadium ore flat kiln roasting process is to use the auxiliary materials NaCl and Na 2 CO 3 , Raw ore powder and coal powder are mixed by a mixer, and then made into green balls by a ball forming machine, and then sent to a flat kiln for roasting. Due to the raw ore powder and auxiliary materials (Na 2 CO 3 and NaCl) ratio is unreasonable, NaCl content is too much, resulting in Na 2 CO 3 Agglomeration, raw ore powder particle size is uneven, roasting humidity is about 650 ℃, green pellet particle size is uneven, making the quality of cooked pellets inconsistent, resulting in too low transfer leaching rate, only 55%. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for increasing the vanadium ore lea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/02C22B34/22
Inventor 任瑞晨岳宝林
Owner LIAONING CHENGUANG FERRO ALLOYS GROUP
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