Oxidizing and granulating device for pigment carbon black and pigment carbon black prepared by same

Abstract

The invention discloses an oxidizing and granulating device for a pigment carbon black. The device is composed of a primary oxidizing granulator, a secondary oxidizing granulator and a rotary dryer. The pigment carbon black is prepared by the following steps: by taking the powdered pigment carbon black as a raw material, performing online wet granulation, simultaneously performing continuous wet oxidization on the carbon black, and drying to obtain the powdered, granulated and oxidized pigment carbon black product with high methylbenzene luminousness; or the pigment carbon black is prepared by the following steps: independently using the secondary oxidizing granulator provided by the device, and by taking an ozone as an oxidant and taking granular carbon black as a raw material, performing dry oxidization on the carbon black. The device can be flexibly matched to produce the oxidized carbon black product in different degrees. The invention additionally discloses a pigment carbon black product produced by the device. The pigment carbon black is powdered and granulated and the methylbenzene luminousness is high.

Description

technical field [0001] The invention relates to a pigment carbon black oxidation-granulation device, which belongs to the production field of pigment carbon black, and also relates to the pigment carbon black produced by the device. Background technique [0002] Carbon black is produced by incomplete combustion or cracking of hydrocarbon substances (solid, liquid or gaseous). 90% of the carbon black produced in the world is used as a reinforcing agent in the rubber field, and less than 10% of the carbon black is used as a coloring pigment in coatings, inks and plastics. As a black pigment, carbon black has excellent blackness, high temperature resistance, good light resistance, good chemical stability, and low price. It is a widely used black pigment. [0003] In the process of using pigment carbon black, it is often necessary to face three problems: [0004] The first is the problem that carbon black is difficult to disperse. [0005] The reason why carbon black is diffi...

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Problems solved by technology

[0010] The third is the problem of dust pollution

[0011] Powdered carbon black has a small specific gravity and is easy to fly. When using powdered carbon black to produce coatings, inks, and plastic products, the feeding process will easily cause carbon black dust pollution.

[0012] The common effective way to solve carbon black dust pollution is to granulate carbon black, but excessive or inappropriate granulation also increases the difficulty of dispersing carbon black in polymer materials, for example, wet granulated rubber carbon black is due to Contains additives such as molasses and dextrin, and the carbon black particles are hard, so it is difficult to apply to the production of coatings and inks. Manufacturers are often used to using powdered pigment carbon black products, which increases the degree of dust pollution

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