Method for synthersizing iron oxide black by taking lime as raw material

A technology of lime and iron black, which is applied in the field of synthesizing iron black with lime as raw material, can solve the problems of high price of liquid caustic soda and high production cost, and achieve stable product quality, low production cost and good market prospect

Inactive Publication Date: 2012-06-20
ANHUI MINGZHU PIGMENT TECH
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Problems solved by technology

[0003] At present, the production method of iron oxide black mainly uses liquid caustic soda as raw material to produce by liquid phase method, and the product quality is good. Only stable iron black products can meet the needs of the market

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  • Method for synthersizing iron oxide black by taking lime as raw material

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Embodiment Construction

[0021] A kind of method taking lime as raw material synthetic iron black is characterized in that comprising the following steps:

[0022] (1), lime and water are digested according to the ratio of mass ratio 1: 1, after digesting, the mass ratio of lime and water is 1: 3 and then add water and stir and mix, slaking into a lime emulsion slurry with a solid content of 30%, Then sieve to remove solid impurities to obtain sieved lime milk slurry;

[0023] (2), the lime emulsion slurry and ferrous sulfate solution that step (1) gained sieves press FeSO 4 : Cao=2.7: 1 mixing, adding water to adjust the solid content is 8-10%, to obtain mixed slurry, adjust the pH value of the mixed slurry with milk of lime to be 7.5-8.5, feed steam and heat up to 95-98 ℃, and then After passing through the air for 3 hours to oxidize, compare it repeatedly with the standard sample, stop the reaction after reaching the production index of iron black, and discharge the material to obtain the reacted ...

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Abstract

This invention relates to a method for synthersizing iron oxide black by taking lime as a raw material, comprising the following steps: digesting lime and water, adding water after finishing digesting the lime and the water, stirring, curing to form lime milk, and sieving to remove slide impurities; mixing the obtained milk slurry and ferrous sulfate solution, adding water to adjust unit the content of solid is 8-10% to obtain a mixed slurry, adjusting the pH value of the mixed slurry to 7.5-8.5 by using the lime milk, introducing steam to heat to 95-98 DEG C, introducing air to oxidize for 2.5-3.5 hours, comparing the mixed slurry with a standard sample repeatedly, stopping the reaction after the production index of the iron oxide black is achieved, and discharging to obtained the slurry of reaction; sieving the slurry of reaction to remove calcium sulfate impurities, filtering, washing, drying and crushing to obtain the product. The iron oxide black synthesized by adopting the method is superior to the common iron oxide black in physical and chemical indexes and is more superior to common iron oxide black in pigment performance.

Description

technical field [0001] The invention relates to a method for producing iron black, specifically a method for synthesizing iron black with lime as a raw material. Background technique [0002] Iron black: Molecular formula Fe 3 o 4 , the chemical name is ferroferric oxide, which belongs to spinel type, has saturated blue ink light black, relative density is 4.73, has good tinting power, and is very stable to light and atmosphere. Iron black has strong tinting power and light resistance Due to its good performance, it is not only used in the paint industry, but also in cement in the construction industry. However, with the development and progress of society, especially the development of coatings and building materials industries, the requirements for the application performance of materials are getting higher and higher, and the requirements for varieties of iron oxide black pigments are also increasing. [0003] At present, the production method of iron oxide black mainl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/08
Inventor 孙晓庆崔前志
Owner ANHUI MINGZHU PIGMENT TECH
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