Method for purifying ferric oxide red by wet method

A technology of wet purification and iron oxide red, which is applied in the direction of iron oxide, iron oxide/iron hydroxide, etc., can solve the problems of poor consistency, large fluctuations, chemical index CL not reaching ultra-high purity iron oxide powder, etc., and achieve The effect of improving the chemical performance index and physical performance index and improving the consistency

Active Publication Date: 2015-04-08
BENXI HUANYU MAGNETIC IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the continuous improvement of the requirements of the lower-end product ferrite for iron oxide powder, it highlights the following two problems: 1. The chemical index CL (chloride ion content) cannot meet the requirements of ultra-high-purity iron oxide powder, and The fluctuation is relatively large, and its usual index is between 0.1 and 0.3%. The physical index BET (physical properties) is low, generally between 2.0 and 3.7 / g, which cannot meet the production requirements of high magnetic permeability iron oxide (downstream high-end products). requirements, and poor consistency

Method used

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  • Method for purifying ferric oxide red by wet method
  • Method for purifying ferric oxide red by wet method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Step a: Transport the cold-rolled pickled iron red in the storage tank to the dissolution kettle through a metering belt scale, and dissolve it according to the ratio of cold-rolled pickled iron red and deionized water at a ratio of 1:5, and add ammonia content of 20% Ammonia water is used as an additive, and then the slurry is kept at a temperature of 30° C., and the rotation speed is 50 rpm for stirring, stirring for 20 minutes;

[0036] Step b: Grind the slurry with a ball mill to keep the diameter of the solid particles at 0.5-1.0 microns. After grinding, send the slurry to the CF-1500I centrifugal dehydrator (such as figure 1 Shown) to separate the impurities, separate the solid from the liquid, and control the water content to be less than 30%;

[0037]Step c: The separated liquid is sent to the storage tank, and discharged after treatment. The separated solid is sent to the dissolving tank, and then step a is carried out, and then the slurry is sent to the CF-1...

Embodiment 2

[0041] Step a: The cold-rolled pickled iron red in the storage tank is transported to the dissolution kettle through a metering spiral belt, and dissolved according to the ratio of cold-rolled pickled iron red and deionized water at a ratio of 1:2, and the content of ammonia added is 10% Ammonium carbonate is used as an additive, and then the slurry is kept at a temperature of 50 ° C, and the rotation speed is stirred at 20 rpm for 80 minutes;

[0042] Step b: Grind the slurry with a ball mill to keep the solid particle diameter at 0.5-1.0 microns. After grinding, send the slurry to the CF-1500I centrifugal dehydrator through a hose pump to separate impurities, separate the solid and liquid, and control After filtering, the water content is less than 30%;

[0043] Step c: The separated liquid is sent to the storage tank, and discharged after treatment. The separated solid is sent to the dissolving tank, and then step a is carried out, and then the slurry is sent to the CF-150...

Embodiment 3

[0047] Step a: Transport the cold-rolled pickled iron red in the storage tank to the dissolution kettle through a metering belt scale, and dissolve it according to the ratio of cold-rolled pickled iron red and deionized water at a ratio of 1:9, and add ammonia content of 5% Ammonium bicarbonate is used as an additive, and then the slurry is kept at a temperature of 20 ° C, and the rotation speed is 100 rpm for stirring, stirring for 20 minutes;

[0048] Step b: Grind the slurry with a sand mill to keep the solid particle diameter at 0.5-1.0 microns. After grinding, send the slurry to the CF-1500I centrifugal dehydrator through a hose pump to separate impurities and separate the solid from the liquid. , the water content after control is less than 30%;

[0049] Step c: The separated liquid is sent to the storage tank, and discharged after treatment. The separated solid is sent to the dissolving tank, and then step a is carried out, and then the slurry is sent to the CF-1500I c...

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Abstract

The invention aims to provide a method for purifying ferric oxide red by a wet method. The method comprises the process route of water-washing, dehydrating and drying and is characterized in that an additive with the ammonia content of 0.05 to 35 percent is added in the water-washing process; impurities are separated by a centrifugal dehydrator during dehydration; preferably, the additive can be ammonia, ammonia water, ammonium carbonate or ammonium hydrogen carbonate with the ammonia content of 0.05 to 35 percent; and the drying method is rotary kiln drying or pulping-centrifugal spraying drying. High-quality ferric oxide powder is obtained by purifying the ferric oxide powder and can serve as a raw material of a high-end product with high magnetic conductivity.

Description

technical field [0001] The invention relates to a method for purifying iron oxide red, and in particular provides a method for purifying iron oxide powder solids using a wet process. Background technique [0002] 1. Performance requirements of iron oxide for manganese zinc ferrite [0003] Since the 1990s, the world's soft ferrite production center has gradually shifted to China. According to statistics, the national output of soft ferrite in 2000 was about 60,000 tons. [0004] Domestic soft ferrites occupy a large proportion of the world's middle and low-end products, but their market share in high-end products is far lower than that of developed countries such as Japan and Europe. Among them, the restriction of raw materials on the quality of China's soft ferrite is obvious. The weight percentage of iron oxide in the manganese-zinc ferrite raw material is about 70%, so to manufacture high-grade manganese-zinc ferrite, the iron oxide raw material must meet the correspon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/06
Inventor 邓文宝
Owner BENXI HUANYU MAGNETIC IND
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