Preparation method for iron oxide red pigment

A technology of iron oxide red and iron hydroxide, which is applied in the direction of iron oxide, iron oxide/iron hydroxide, fibrous filler, etc., can solve the problems of large amount of waste, environmental pollution, waste of resources, etc., and the method is simple, Improve the effect of environmental pollution and save social resource waste

Inactive Publication Date: 2020-02-04
石门磷和化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the invention is to provide a preparation method of iron oxide red pigment, which solves the problem of pickling and washing water and sewage in the production process of enterprises such as steel pipe pickling and cold drawing, seamless steel pipe, steel rod in the shop, special sheet for automobiles, and steel rolling. Sludge solid waste, phosphating slag solid waste and other waste
And the total amount of waste is large, and the existing usual treatment methods are filling up, incineration, etc., which do not have the proper effect of volatilizing the useful substances contained in the waste, resulting in waste of resources, and will also affect environmental pollution problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method of iron oxide red pigment, the preparation method comprises the following steps:

[0024] Step 1, processing the waste containing iron to obtain a mixture containing ferric hydroxide, ferrous hydroxide or ferric hydroxide and ferrous hydroxide;

[0025] Step 2, mix the mixture with water at a weight ratio of 1:1, add additives, and pre-disperse with a high-speed disperser; the amount of additives added is 0.01% of the weight of the mixture;

[0026] Step 3, grinding at 70°C for 1 hour;

[0027] Step 4, the ground slurry is mixed with iron filings, and concentrated sulfuric acid is added, and the pH value is 2 to 5, and the gas is reacted at 60 to 95 ° C for 3 hours;

[0028] Step five, rinse with water until neutral;

[0029] Step 6, drying at a constant temperature in the presence of oxygen to obtain a dry powder;

[0030] Step 7, placing the dry powder under airtight conditions for a certain period of time to obtain γ-FeO, and performing color ...

Embodiment 2

[0039] A preparation method of iron oxide red pigment, the preparation method comprises the following steps:

[0040] Step 1, processing the waste containing iron to obtain a mixture containing ferric hydroxide, ferrous hydroxide or ferric hydroxide and ferrous hydroxide;

[0041] Step 2, mix the mixture with water at a weight ratio of 1:2, add additives, and pre-disperse with a high-speed disperser; the amount of additives added is 0.02% of the weight of the mixture;

[0042] Step 3, grinding at 85°C for 4 hours;

[0043] Step 4, mixing the ground slurry with iron filings, adding concentrated sulfuric acid, and reacting with ventilation at pH 2-5, 60-95°C for 4 hours;

[0044] Step five, rinse with water until neutral;

[0045] Step 6, drying at a constant temperature in the presence of oxygen to obtain a dry powder;

[0046] Step 7, placing the dry powder under airtight conditions for a certain period of time to obtain γ-FeO, and performing color matching to obtain iron o...

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PUM

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Abstract

The invention discloses a preparation method for an iron oxide red pigment. The method comprises the following steps: performing treatment on iron-containing waste to obtain a mixture containing ironhydroxide and ferrous hydroxide, or a mixture of iron hydroxide and ferrous hydroxide; mixing the mixture and water, adding an additive, and performing pre-dispersion by using a high-speed disperser;performing grinding at 70-85 DEG C for 1-6 h; mixing the ground material and iron filings, adding concentrated sulfuric acid, and performing a reaction for 3-6 h under ventilation at the pH value of 2-5 and the temperature of 60-95 DEG C; performing rinsing by using water to be neutral; performing drying at constant temperature in the presence of oxygen to obtain dried powder; and placing the dried powder under closed conditions for a certain period of time to obtain gamma-FeO, and performing color mixing to obtain the iron oxide red pigment. The method is simple, and can effectively make useful substances contained in the waste play a due role, thereby saving the waste of social resources and improving the problem of pollution to the environment caused by the waste.

Description

technical field [0001] The invention relates to the technical field of iron oxide pigment preparation, in particular to a preparation method of iron oxide red pigment. Background technique [0002] Iron oxide pigments are an ancient pigment. According to research, about 20,000 years ago, humans began to use natural iron-based pigments in paintings. At present, among the iron oxide pigments produced every year in the world, natural pigments and artificial pigments are about 0.1Mt and 0.6Mt respectively. According to reports, the world currently consumes about 700Kt-800Kt of iron oxide pigments every year, and the consumption is as high as more than 1 billion US dollars. Iron oxide red is the product with the largest output and consumption of iron oxide pigments. Taking the United States as an example, among the 70kt iron oxide pigments consumed each year, iron red accounts for 42.9%, iron yellow accounts for 38.1%, and iron brown and iron black account for 19%. In recent y...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C01G49/06C09C1/24
CPCC01G49/06C09C1/24
Inventor覃业爱
Owner石门磷和化工有限公司