Particulate ferric oxide red pigment and method for producing the same

A technology of iron oxide red and a manufacturing method, applied in the direction of fibrous fillers, etc., can solve the problems of difficult application in industrial automation production lines, serious dust pollution of powdery pigments, difficult feeding and metering, etc. Color performance, the effect of not easy to raise dust

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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition to serious dust pollution, powdered pigments also have the disadvantage of not being easy to add and measure, making it difficult to apply to industrial automation production lines
In addition, in the application of powdered iron oxide red pigment, it is not easy to disperse when put into water and other solvents, such as paint, cement, asphalt and other materials, it is easy to agglomerate, and the color is easy to change and the particles are fragile after plastic granulation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The preparation method of the granular iron oxide red pigment described in this embodiment, after heating 20kg of water to 30°C, add 0.4kg of sodium carboxymethylcellulose, 0.1kg of ferrous sulfate, and continue to heat at 50°C until completely dissolved; B, Take 100kg of iron oxide red pigment, put it into a Φ1500 disc granulator, spray it on the powder with a spray tank (using a pressure of 0.1Mpa) containing a mixed solution of sodium carboxymethylcellulose and ferrous sulfate, and gradually form a small Spherical particles; C is screened with a 10-mesh vibrating sieve, and the obtained particle size material is dried to obtain the finished product.

[0013] In this embodiment, due to the adoption of sodium carboxymethylcellulose and ferrous sulfate as additives, the powdered iron oxide red pigment can be effectively granulated, and in the granulation process, especially due to the presence of ferrous ions The presence of iron oxide red composition (Fe 2 o 3 ) comp...

Embodiment 2

[0015] Add 20kg of water to 0.4kg of polyvinyl alcohol, 0.1kg of sodium lignosulfonate, and 0.1kg of ferrous sulfate, and heat at 50°C until it dissolves completely; take 100kg of iron oxide red pigment, add it to a Φ3000 disc ball forming machine, and use a The spray tank of the mixed solution (using a pressure of 0.5Mpa) is sprayed onto the powder to gradually form small spherical particles; screened with a 30-mesh vibrating sieve, and the obtained particle size material is dried to obtain the finished product.

Embodiment 3

[0017] First crush and mix 0.4kg of sodium silicate, 0.2kg of gelatin, and 0.1kg of ferrous sulfate, then heat 20kg of water at 50°C, add the crushed material, and heat at 80°C until it dissolves completely; take 100kg of iron oxide red pigment, Add Φ3000 disc ball forming machine, spray the powder with a liquid spray tank (using a pressure of 0.2Mpa) equipped with a mixed solution, and gradually form small spherical particles; use a 40-mesh vibrating screen to screen, and dry the obtained particle size materials , the finished product is obtained.

[0018] The additive component in this example uses sodium silicate, which reduces the cost of granulation without changing the granulation effect.

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Abstract

The present invention is granular iron oxide red pigment of grain size of 5-100 mesh and its preparation process. The preparation process includes the following steps: compounding water solution of additive in the concentration of 0.3-10 % and heating to 30-100 deg.c; spraying the water solution to iron oxide red in a pelletizing machine to form the granular pigment gradually with the weight ratio of iron oxide red to the water solution being 100 to 15-40; and vibration sieving and stoving to obtain the product. The additive is the combination of two or more of CMCNa, PVA, sodium silicate, glutin, sodium lignosulfonate and ferrous sulfate. The granular iron oxide red pigment has the same performance and use effect as the powdered iron oxide red pigment and is favorable to prevent dust pollution, and may be used to replace powdered iron oxide red pigment.

Description

technical field [0001] The invention relates to a pigment and a manufacturing method thereof, in particular to a granular iron oxide red pigment and a manufacturing method thereof. technical background [0002] At present, iron oxide red pigments are all in powder form. Due to the small size of dust particles, people who are in frequent contact with them are very susceptible to occupational diseases, especially pneumoconiosis. Pneumoconiosis refers to a disease mainly caused by lung tissue fibrosis caused by inhaling dust during production activities. It has the characteristics of high morbidity and mortality. my country is the country with the largest number of pneumoconiosis cases in the world. According to statistics from the Ministry of Health in 2002, the number of pneumoconiosis, a typical occupational disease, has reached 430,000 in my country, which is equivalent to the sum of the number of cases in other countries. Since the inspection rate of dust workers in vari...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/24
Inventor 曹位明
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