A kind of method for preparing white carbon black by carbonization method

Abstract

The invention relates to a method of preparing white carbon black by virtue of a carbonization method. The method comprises the following steps: adding water into liquid water glass with the modulus to be 2.5-3.8 to prepare a water glass liquid with the mass percent of 5-25 percent, uniformly stirring at the temperature of 40-90 DEG C, introducing the mixture into a high-pressure atomization reaction tower, controlling the pressure of a tower body to be 0.05-0.8MPa, supplementing carbon dioxide gas to keep stable pressure, exhausting waste gas, keeping the volume content of carbon dioxide in gas in the tower body to be 60-100 percent, controlling the temperature in the tower body to be 40-90 DEG C, carrying out continuous production, settling white carbon black slurry at the bottom of the reaction tower, conveying the white carbon black slurry to a storage tank by virtue of a pipeline to obtain white carbon black grout, washing, grinding, and drying to obtain a white carbon black finished product, wherein the atomization particle size is 5-100 microns. The method is simple in equipment requirements, rapid and efficient in reaction, small in particle size of the produced white carbon black product and uniform in distribution, is environmentally friendly without pollution, accords with various performance indexes of white carbon black for rubber and has good economical benefit.

Description

technical field [0001] The invention relates to a method for preparing white carbon black by carbonization. In the present invention, the water glass solution is atomized through a high-pressure spray reaction tower, and then in-situ reacts with a gas containing carbon dioxide in a high-pressure spray reaction tower maintaining a certain pressure to prepare a white carbon black slurry, which is washed and refined, and then dried and granulated to obtain The process of white carbon black finished product, the method of the invention has high reaction efficiency and fast speed, can continuously produce white carbon black, and meets the requirement of environmental protection. Background technique [0002] With the introduction of the concept of green tires, silica has gradually become a research hotspot. Compared with the traditional filler carbon black required in the tire industry, the application of silica in tires has more advantages, such as lower rolling resistance and ...

AI Technical Summary

Problems solved by technology

In the high-pressure spray reaction tower maintaining a certain pressure, under the high-speed rotation of the centrifugal atomizer, the water glass solution is atomized into countless fine droplets with a particle size of 5-100 microns, and the gas containing carbon dioxide is introduced to participate in the reaction and maintenance. Tower internal pressure, in-situ reaction in the high-pressure spray reaction tower to prepare silica slurry, this method is based on high-pressure reaction, thus ensuring that the reaction can be completely carried out, efficient and continuous, and solves the problem of the traditional carbonic acid method. The reaction time in carbon black is long, the consumption of carbon dioxide is large, the efficiency is low, and the continuous production cannot be produced.

Images