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Tech. of extracting metallic cobait from magnetic-iron ore tailing slag

A technology for extracting metals and magnetite, which is applied in the field of cobalt metal extraction technology, can solve problems such as large gap between supply and demand

Inactive Publication Date: 2006-11-15
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the rapid development of high-tech industries, the demand for metal cobalt is increasing at an average annual rate of about 6%, and the gap between supply and demand is getting bigger and bigger.

Method used

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  • Tech. of extracting metallic cobait from magnetic-iron ore tailing slag

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Experimental program
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Effect test

Embodiment 1

[0030] The magnetite tailings are subjected to high-temperature roasting at 600°C for about 2.5 hours. The roasted solid slag is ground to a particle size of more than 200 mesh, and the powder is leached with 30% sulfuric acid to make the liquid-solid ratio 2:1, the temperature is 80°C, and the time is 1 hour. Add 10% sodium carbonate to the obtained solution to adjust the pH value of the solution to 10, and remove iron in the form of insoluble salt. After the reaction was completed, it was filtered, and the filter residue was washed twice with water. Take a certain amount of solution after iron removal, add Na 2 S 2 o 3 , so that Cu and Na 2 S 2 o 3 The mass ratio of the mixture is about 1:8, heated to make the temperature reach 90, the pH is 2.5, and the reaction time is 1.0h. Add NaF according to the total content of Ca and Mg, so that the molar ratio of the two reaches 1:1.2, and react for about 1.5h. Use organic phosphine extractants P204 and P507 to further remov...

Embodiment 2

[0032]The magnetite tailings were roasted at a high temperature of 700°C for 3.5 hours. The roasted solid is ground to a particle size of more than 200 mesh, and the powder is leached with 33% sulfuric acid to make the liquid-solid ratio 2.5:1, the temperature is 90° C., and the time is 1.2 hours. Adding 12% sodium carbonate to the obtained solution to adjust the pH value of the solution to 12, the iron can be removed in the form of insoluble salt. After the reaction was completed, it was filtered, and the filter residue was washed with water for 3 times. Take a certain amount of solution after iron removal, add Na 2 S 2 o 3 , so that Cu and Na 2 S 2 o 3 The mass ratio of the mixture is about 1:9, heated to make the temperature reach 93°C, the pH is 2.8, and the reaction time is 1.2h. Add NaF according to the total content of Ca and Mg therein, so that the molar ratio of the two reaches 1:1.4, and react for about 1.8 hours. Use organic phosphine extractants P204 and P5...

Embodiment 3

[0034] The magnetite tailings were roasted at a high temperature of 750°C for 4.5 hours. The calcined solid is ground to a particle size of more than 200 mesh, and the powder is leached with 35% sulfuric acid to make the liquid-solid ratio 3:1, the temperature is 100° C., and the time is 1.5 hours. Adding 15% sodium carbonate to the obtained solution to adjust the pH value of the solution to 15, the iron can be removed in the form of insoluble salt. After the reaction was completed, it was filtered, and the filter residue was washed with water for 3 times. Take a certain amount of solution after iron removal, add Na 2 S 2 o 3 , so that Cu and Na 2 S 2 o 3 The mass ratio of the mixture is about 1:10, heated until the temperature reaches 95°C, the pH is 3.0, and the reaction time is 1.5h. Add NaF according to the total content of Ca and Mg therein, so that the molar ratio of the two reaches 1:1.5, and react for about 2.0 hours. Use organic phosphine extractants P204 and ...

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Abstract

This invention discloses a technology to extract the cobalt from the tailing of magnetic iron ore. Its characteristics are as follows: (1) calcining the pretreatment magnetic iron ore at high temperature, (2) prophyrizing the magnetic iron ore which is handed as (1), (3) extracting the ore by sulfuric acid, (4) eliminating the rare-earth, iron, calcium and magnesium by chemical neutralization, (5) eliminating the copper, manganese, zinc and other substance with extraction reagent P204, then we can get cobalt solution by separating nickel and cobalt with extraction P507, (6)back-extracting, (7)depositing the cobalt with ammonium oxalate, (8) calcining the ammonium oxalate to high lever cobalt dioxide. The quality of cobalt dioxide recovered by this way can achieve to the lever of international Y0, the recovery ratio of cobalt can be above 85%.

Description

Technical field [0001] The invention belongs to the technical field of metal cobalt extraction technology, and mainly relates to a technology for extracting metal cobalt from magnetite tailings. technical background [0002] Cobalt has a wide range of uses and is mainly used to produce various special alloys. However, with the rapid development of high-tech industries, the demand for metal cobalt is increasing at an average annual rate of about 6%, and the gap between supply and demand is getting bigger and bigger. Cobalt is a relatively active metal, and it is difficult to exist as a single metal in nature, and its mineralization is very scattered. my country's cobalt ore resources are very poor. Among the proven cobalt resources, there are very few high-grade cobalt ores, and most of them are associated with other deposits. [0003] According to different raw materials, the production process of cobalt is quite different, but it is mainly divided into fire method and wet...

Claims

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Application Information

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IPC IPC(8): C22B23/00C22B1/02C22B3/00C22B3/08
Inventor 黄兴远张军冯汇川严克杰李水良钟延粉王国强王捷郭天立赵勇王献钊
Owner HENAN UNIV OF SCI & TECH
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