Titanium series environment-friendly pigment with composite mineralizer and preparation method thereof

Abstract

The invention discloses a titanium environmental pigment with a compound mineralizer. The titanium environmental pigment comprises 60-80 parts of titanium dioxide, 15-40 parts of nitrate, 3-20 parts of compound mineralizer, and also comprises 10-15 parts of antimonous oxide. The preparation method comprises the following steps: adding titanium dioxide or titanium dioxide and antimonous oxide to a water solution into which a surfactant is dissolved; adding a water-insoluble mineralizer and the nitrate after evenly dispersing; slowly dropwise adding a lye clear liquor, and controlling the adding response speed, nucleation and growth speeds of a nanometer material and a pH value, and then aging, so that the shape of the nanometer hydroxide formed at the surface of the titanium dioxide is a similar spherical shape, the particle size is about 25-40nm; rinsing, so that the content of the impurity is lower than 20ppm; adding the mineralizer dissolved into water to the rinsed slurry to carry out spray drying when the pH value of the solution is in a near-neutral state, and then burning the dried powder in a muffle furnace, so as to obtain pigment powder which is bright in color and luster, narrow in particle size distribution range and strong in tinting strength after heat preservation.

Description

technical field [0001] The invention relates to the field of powder metallurgy preparation, in particular to the application of a composite mineralizer in environment-friendly titanium pigments. Background technique [0002] The issue of energy conservation and emission reduction has attracted more and more attention from the international community. The promotion of low-carbon and environmentally friendly products and the strengthening of energy conservation and emission reduction are important means to deal with the deteriorating environment and resource shortage. At present, the more mature products on the market are mostly prepared by the solid-phase method. The solid-phase method involves high-speed ball milling of the required raw materials, and then drying and calcination of the powder after ball milling. This preparation method has low equipment requirements, simple and easy-to-control process, and low product cost, so it is adopted by many manufacturers. However, d...

AI Technical Summary

Problems solved by technology

However, due to the lack of molecular-level contact of the raw materials in the solid phase method during the ball milling process, the dispersion will be uneven, and during the calcination process, the replacement solid solution between the powders is not sufficient. On the other hand, some raw materials are in A stable crystal structure has been formed before ball milling. During the calcination process, high temperature and holding time are required to allow the colored ions to enter the titanium dioxide lattice, which consumes a lot of energy.

The liquid phase method is that the raw materials are mixed at the molecular level, which can achieve a high degree of uniform dispersion, and the prepared product has a positive color and strong tinting strength, which can reduce the calcination strength to a certain extent, but it will also bring about serious agglomeration problems