Main components of Iron Oxide red
The appearance of iron oxide is orange-red or deep purple-red triangular crystalline powder, which is iron oxide red. The main component is iron oxide, and the chemical formula is Fe2O3, also known as rust red, ferrite red, iron lead, etc. It is an inorganic red pigment. There are two kinds of iron oxide red, natural and synthetic. The natural one is called Xihong, with relative density of 55.25, fineness of 0.4-20um, and melting point of 1565 (decomposition). Iron oxide red is made by dry and wet methods. The dry process products have large crystals and hard particles, and are suitable for magnetic materials and Polishing Abrasive materials. Wet products have fine crystals, soft particles, easy to grind, and easy to be used as pigments. Iron oxide red is insoluble in water and oil, soluble in hot concentrated ACID, slightly soluble in alcohol, without oil permeability and water permeability.
Iron oxide red has strong coloring power and strong covering power, bright color, good dispersion, light resistance, heat resistance, acid resistance, alkali resistance, and turbidity gas resistance, stable performance, rust prevention, UV resistance, and non-toxic and harmless, so it has a wide range of uses in modern production and life.
Use of iron oxide red
According to the properties of iron oxide red, it can be classified as follows:
1 Industrial use of iron oxide red with strong coloring power:
(1) Coloring use of iron oxide red in building materials
Iron oxide red is mainly used in the building materials industry for color cement, color cement floor tile, artificial marble, color cement tile, imitation glazed tile, concrete floor tile, color mortar, color asphalt, color rubber and plastic, terrazzo, mosaic tile, etc.
(2) Coloring use of iron oxide red in paint, paint and glaze
Iron oxide red is used for water-based exterior wall coating, powder coating, etc; It is also used for oily paint, including epoxy, alkyd, amino and other primers and topcoats; It can also be used for toy paint, decorative paint, furniture paint, electrophoretic paint and enamel. Iron oxide red is widely used for manual painting on the surface and under the glaze, as well as for decal paper, screen printing, leather, etc.
(3) Application of iron oxide red in coloring plastic and rubber products
Such as thermosetting plastics and thermoplastics, used as colorants and fillers. For example, iron oxide red is used for coloring plastic flower pots, plastic toys, and rubber products, such as automobile inner tubes, aircraft inner tubes, bicycle inner tubes, etc.
3 Industrial use of protective substance of iron oxide red
For example, iron oxide red is used for water-based exterior wall coatings, powder coatings, etc. The iron oxide red primer has the antirust function and can replace the high-priced red lead paint to save non-ferrous metals. It can improve the wear resistance of asbestos plastic products, such as brake pads and brake pads.
4. Industrial use of high-end iron oxide red in high-grade fine grinding materials
High-end iron oxide red is used as polishing agent for precision hardware instruments, optical glass, gemstones, etc. High purity iron oxide red is the main base material of powder metallurgy, which is used to smelt various magnetic alloys and other high-grade alloy steels.
5. Medical use of iron oxide red in medicine
Medical iron oxide red is non-toxic, odorless, tasteless, and has no side effects. It meets the requirements of the Pharmacopoeia for Medicines. It can be used as a medicinal supplement for western medicine and health care products, and plays a role in improving the efficacy of treatment. It is an ideal color for the coating of various tablets and pills, and is an excellent pigment to improve the recognition of drugs. Medical iron oxide red is also used for the color matching of traditional Chinese medicine powder.
Iron oxide red can be added as a feed additive, which is conducive to the growth of livestock animals. For example, it can be made into health sand to supplement the nutrients and trace elements that pigeons can not get in the feed, which is very conducive to pigeon digestion.
6 Use of edible iron oxide red in cosmetics and food
Edible iron oxide red is mainly used as cosmetics lake, and is used in facial and eye cosmetics. Such as foundation cream, powder, eye shadow, lipstick, nail polish, so red iron oxide does not harm the skin. Eating iron oxide red mainly contains iron ions, which are non-toxic. Iron is an essential element for human body. Food added with iron oxide red in an appropriate amount will produce iron chloride due to the combination of iron oxide red and stomach acid, which is non-toxic and will not be harmful to human body. For example, in Japan, food iron oxide red is used in foods such as red bean rice and konjac flour.
