Method and equipment for producing aluminum pigment having metal effect

Abstract

The invention discloses a method for producing aluminum pigment having metal effect. The method comprises the following steps of: a, mixing nitrogen atomization spherical aluminum powder with d50 being 3-10mum with a solvent in a mass ratio of 4-6:94-96 to form a mixture, adding a dispersing agent containing 1.5-2.5wt% of aluminum powder into the mixture, performing classification process at 0.3-0.5MPa, and filter pressing and drying grit materials to obtain a filter cake B; b, mixing the filter cake B with the solvent in a mass ratio of 4-6:94-96 to form a mixture, performing classification process at 0.3-0.5MPa, and filter pressing and drying grit materials to obtain a filter cake D; c, mixing the filter cake D with the solvent in a mass ratio of 4-6:94-96 to form a mixture, performing classification process at 0.3-0.5MPa, and filter pressing and drying grit materials to obtain a filter cake F; d, mixing the filter cake F, the solvent and the dispersing agent to form a mixture liquid, grinding for 20-50 hours, and passing through sieve plates of 325 meshes and 500 meshes orderly; e, mixing the materials obtained after sieved in the step d with the solvent to form a mixture liquid containing 4-6wt% of aluminum powder, performing classification process in a wet mode at 0.3-0.5MPa, and filter pressing the grit materials; and f, kneading the filter cakes obtained through filter pressing the grit materials in the step e to obtain the aluminum pigment.

Description

technical field [0001] The invention belongs to the technical field of fine inorganic chemical industry, and in particular relates to a method for manufacturing a strong metal effect aluminum pigment. Background technique [0002] Driven by the demand of the consumer market, pigments that can produce special effects (such as color flop or decorative pattern effects) are popularized and applied in various industrial products and end users, and their economic value is also increasing. Aluminum pigment is an important metal effect pigment, which is produced with pure aluminum metal and has many characteristics of aluminum metal itself; aluminum pigment particles are actually flakes with pigment properties coated with a fatty acid film on the surface. Morphology gives it a unique character. Because of its superior corrosion resistance and decorative properties, it is widely used. [0003] There are two main methods of manufacturing metal effect aluminum pigments: the first met...

AI Technical Summary

Problems solved by technology

However, the particle size distribution of aluminum pigments produced by traditional methods is not concentrated enough, especially there are a large number of fine particles in the powder, which is reflected in the particle size distribution data as D 10 Insufficient size or large span; the reflected metal effects such as: flickering, metallic feeling, color with the angle and other indicators are difficult to meet the market requirements

Moreover, in the existing process of aluminum powder, it is easy to cause the coarser particles to be over-grinded and the finer particles not to form flakes, which will eventually affect the metal effect of the aluminum pigment product.

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