Method for preparing high-purity iron oxide from iron oxide

An iron oxide, iron oxide technology, applied in iron oxide, iron oxide/iron hydroxide and other directions, can solve the problems of consumption and low iron yield, and achieve the effect of high performance and stable quality

Pending Publication Date: 2021-10-08
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent CN1683251 discloses a method for preparing iron oxide powder. This invention uses rolling steel pickling iron mud as the base material, which not only can omit the crushing procedure, but also can prepare di Iron, this method can greatly reduce the cost, but the hydrogen fluoride gas used in the process of removing silicon can not only remove silicon, but also consume a large amount of iron in the material. Therefore, although this method can obtain high-purity ferric oxide, but iron yield is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation method comprises steps:

[0028] (1) Mix 120 grams of iron ore with 55% iron content and 50 grams of sodium carbonate evenly in a graphite crucible, heat the graphite crucible in a muffle furnace, heat it to 1200 ° C, and keep it warm for 1 hour. Furnace cooling to obtain sodium ferrite;

[0029] Prepare 100ml of hydrochloric acid solution with a volume concentration of 20%, add the sodium ferrite prepared in step (1), stir at 40°C for 60 minutes, filter, adjust the pH of the solution to 2 with ammonia water, and obtain a ferric chloride solution;

[0030] (2) Mix 1.5mol / L N235 and sulfonated kerosene in a ratio of 1:1 as the extraction organic phase, and perform extraction, washing, and back extraction in a fractional extraction tank with 3 stages of extraction, 8 stages of washing, and 5 stages of back extraction , flow ratio is: organic phase: rare earth solution: lotion=2.5:1:0.4, obtains the ferric chloride solution of purification;

[0031] (3) A...

Embodiment 2

[0033] (1) Mix 150 grams of iron oxide sheet with 70% iron content and 45 grams of sodium carbonate evenly in a graphite crucible, put the graphite crucible in a muffle furnace for heating, heat it to 1200 ° C, keep it warm for 1 hour, and heat it with the furnace Cooling to obtain sodium ferrite;

[0034] (2) preparing 100ml of sulfuric acid solution with a volume concentration of 30%, adding the sodium ferrite prepared in step (1), stirring at 30°C for 120 minutes, filtering, adjusting the pH of the solution to 1.5 with ammonia water, to obtain ferric sulfate solution; / L P204 and sulfonated kerosene are mixed according to the ratio of 1:1 as the extraction organic phase, and extraction, washing, and back extraction are carried out in a fractionation extraction tank with 6 stages of extraction, 9 stages of washing, and 4 stages of back extraction. The flow ratio is: organic Phase: rare earth solution: lotion=2.8:1:0.6, obtains the ferric sulfate solution of purification;

...

Embodiment 3

[0037] (1) 200 grams of converter iron slag with an iron content of 25% and 60 grams of sodium carbonate are evenly mixed and placed in a graphite crucible, and the graphite crucible is heated in a muffle furnace, heated to 1200 ° C, kept for 1 hour, and then Furnace cooling to obtain sodium ferrite;

[0038] (2) preparation volume concentration is 100ml of nitric acid solution of 40%, add the sodium ferrite prepared by step (1), stir at 40 DEG C for 180 minutes, filter, adjust the pH of the solution with ammonia water to be 2.5, obtain ferric nitrate solution; / L TBP and sulfonated kerosene are mixed according to the ratio of 1:1 as the extraction organic phase, and extraction, washing, and back extraction are carried out in a fractionation extraction tank with 5 stages of extraction, 9 stages of washing, and 3 stages of back extraction. The flow ratio is: organic Phase: rare earth solution: lotion=3.2:1:0.8, obtains the ferric nitrate solution of purification;

[0039] (3) ...

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PUM

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Abstract

The invention discloses a method for preparing high-purity iron oxide by using iron oxide. The method comprises the following steps: reacting an iron oxide with carbonate to prepare sodium ferrite, dissolving the sodium ferrite with acid, extracting, purifying, preparing the iron element into ferric oxalate or ferric hydroxide precipitate, and roasting to obtain a high-purity iron oxide product. According to the invention, by converting the iron oxide into the sodium ferrite, the iron element in the raw material can be greatly enriched, the purity of the obtained iron oxide product is higher than 99.9%, the quality is stable, the performance is high, and the raw material source for preparing the high-purity iron oxide is greatly expanded.

Description

technical field [0001] The invention relates to the field of preparation of high-purity iron oxide, in particular to a method for preparing high-purity iron oxide by using iron oxide. Background technique [0002] Iron oxide and oxides of other metal elements can be made into magnetic materials with different crystal structures under different conditions, such as soft ferrite, permanent ferrite, gyromagnetic ferrite and piezomagnetic ferrite. One of the important raw materials. High-purity ferrite is mainly used to prepare components for electronics, automobiles, home appliances, medical and electric toys, etc. Therefore, the purity of high-purity iron oxide directly determines the performance and price of high-purity ferrite. For example, the use of high-quality microwave ferrite materials made of high-purity iron oxide for military radar can improve the performance of radar and play an important role in the development of electronics. [0003] Patent CN102390869 provides...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/06
CPCC01G49/06C01P2006/80
Inventor 彭军常宏涛张芳张福顺王永斌
Owner INNER MONGOLIA UNIV OF SCI & TECH
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