Method of utilizing hematite wet method to synthesize ultramicro magnetic ferriferrous oxide

Abstract

The present invention provides a method of utilizing hematite wet method to synthesize ultramicro magnetic ferriferrous oxide black powders. The method is achieved by the following processes: 1, performing simple machine ball mill to the hematite raw ore, to obtain hematite powders (containing iron 64%); 2, dispersing the hematite powder and sodium hydrate according to the weight ratio of 1:0.5-1:2.5, and then pouring upper steel sleeve of the polyfluortetraethylene inner sleeve, placing in the heat source with the temperature of 160 - 200 DEG C for heat insulation 16 - 24 hours; natural cooling or using cold water for cooling to the room temperature, collecting the mother liquor, repeatedly cleaning the precipitate, using permanent magnet to collect the black ferriferrous oxide magneticpowder. The mother liquor can be reused. The invention directly use a hematite raw ore wet method to prepare high purity ultramicro ferriferrous oxide magnetic black powders, the product has uniform particle, perfect dispersancy, high crystallinity, good black degree, and the like advantages, and can be widely used in coatings, building, plastic coloring, printing ink, printing materials, sealing,lithium battery materials, and other related industries; the invention has low raw material, simple process and is apt to large-scale industrial production.

Description

Wet synthesis of black ultra-micromagnetic ferric oxide from hematite technical field The invention belongs to the field of synthesis of ferrite magnetic micropowder, in particular to a method for synthesizing ultrafine magnetic ferric iron tetroxide black micropowder from hematite raw ore at low temperature in solution. Background technique Among many ferrite magnetic powder materials, ferric oxide is widely used in many fields due to its unique physical properties, such as: magnetic fluid, magnetic recording, medicine, material sealing, lithium battery materials, coatings, construction, Plastic coloring, ink, printing, etc. At present, the raw materials for preparing magnetic ferric iron tetroxide powder by wet method in industry are mainly soluble iron sources with high cost. However, in recent years, it has been found that the use of solid iron sources can also synthesize magnetic ferric iron tetroxide powders that meet industrial requirements, as mentioned in "China ...

AI Technical Summary

Problems solved by technology

However, the hydrogen gas produced during the former group of experiments poses a greater threat to the experimental equipment in a high-temperature environment, while the hydrazine hydrate used in the latter group is volatile and unfavorable to the working environment

Thereby all can only be used as a kind of experimental exploration and are not conducive to the large-scale production of industry

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