Preparation method and device of iron oxide pigment

Abstract

The invention discloses a preparation method of an iron oxide pigment, and relates to the technical field of iron oxide pigment preparation, and the preparation method specifically comprises the following steps: crushing and pulping a pigment filter cake, grinding slurry, carrying out color mixing treatment on the ground color paste, and finally granulating and drying through a spray drying tower and a fluidized bed system. According to the preparation method of the iron oxide pigment, slurry entering the grinding frame is heated, particles of the heated slurry are expanded, the grinding performance of the particles of the slurry is obviously improved, the particles in the slurry are rapidly ground between the grinding block and the filter screen, in this way, the particle size of the prepared iron oxide pigment can be kept uniform, meanwhile, the preparation efficiency of the iron oxide pigment can be improved, slurry in the color mixing tank is heated through steam, particulate matter in the slurry is kept in an active state, the high-speed stirring effect of the material mixing frame is matched, and the mixing effect and the mixing speed of the color paste are effectively improved.

Description

technical field [0001] The invention relates to the technical field of iron oxide pigment preparation, in particular to a preparation method and device for iron oxide pigment. Background technique [0002] Iron oxide is the second largest inorganic pigment next to titanium white, and it is also the largest color inorganic pigment. Iron oxide pigments mainly include iron oxide red, yellow, black and brown iron oxide as the basic material. , iron oxide yellow, also known as iron oxyhydroxide, will dehydrate and decompose at about 177 degrees Celsius and turn red. Therefore, the application of ordinary iron yellow pigments in high-temperature occasions such as plastic processing and baking coatings is limited. Iron oxide The surface coating of the yellow pigment can improve its temperature resistance, thereby expanding the application field of the iron oxide yellow pigment. The preparation process is mainly prepared by a wet method, and the wet method can make the pigment prepa...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a method and device for preparing iron oxide pigments, which solves the problem that the uniform particle size of the iron oxide pigments cannot be guaranteed in the process of preparing iron oxide pigments, and the The mixing effect between them is poor, which in turn reduces the problem of the preparation efficiency of iron oxide pigments

Images