Hydrochloric acid-extraction method for preparing rutile titanium white

Abstract

The invention discloses a hydrochloric extraction method to prepare rutile-type titan white, which comprises: decomposing the ilmenite with hydrochloric acid and iron powder to reduce high-valence ferrum; separating titanium tetrachloride with solvent extraction to form water liquid with given concentration; adding macromolecular organics for thermal hydrolyzation; filtering, bleaching, and obtaining high-pure fine grain of metatitanic acid; treating with salt, microwave drying, calcining at 900Deg, screening, and obtaining the product. This method needs low energy consumption, and fits to low or rich grade material.

Description

1. Technical field

[0001] The invention relates to a method for producing rutile titanium dioxide, in particular to a method for preparing rutile titanium dioxide with a hydrochloric acid method. 2. Background technology

[0002] Due to its high refractive index, stable chemical properties, good decolorization power and gloss, rutile titanium dioxide is currently the world's preferred high-quality white pigment and is widely used in coatings, papermaking, plastics, enamel, paints, inks, rubber, cosmetics, etc. industry. With the rapid development of my country's economy, the domestic titanium dioxide market has undergone tremendous changes. In 2003, my country's titanium dioxide consumption reached 600,000 tons, becoming the world's second largest consumer after the United States (1.14 million t / a). In recent years, the production and demand of titanium dioxide in my country have been growing rapidly, but compared with domestic products and imported products, the grade of ...