A kind of preparation method and device of iron oxide pigment

Abstract

The invention discloses a method for preparing an iron oxide pigment, which relates to the technical field of iron oxide pigment preparation, and specifically includes crushing and beating the pigment filter cake, grinding the slurry, and performing color mixing treatment on the ground color paste , and finally granulated and dried through a spray drying tower and a fluidized bed system. In the preparation method of the iron oxide pigment, by heating the slurry entering the inside of the grinding frame, the heated slurry particles are expanded, the grinding performance of the slurry particles is significantly improved, and the particles in the slurry are in the grinding block and the filter. Fast grinding between the nets, so that the particle size of the iron oxide pigment can be kept uniform, and at the same time, the preparation efficiency of the iron oxide pigment can be improved. Steam is used to heat the slurry in the color mixing tank to make the slurry The particles in the mixture remain active, and with the high-speed stirring effect of the mixing rack, the mixing effect and mixing speed between the color pastes 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...

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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

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