Method for producing carbon black for shielding material inside cable

Abstract

The invention relates to a method for producing carbon black for a shielding material in a cable. The method comprises the steps that fuel gas and preheated air are input into a combustion section ofa reaction furnace, and the volume ratio of air to gas is (16 to 1) to (17 to 1), and the combustion temperature of the combustion section reaches 1850 DEG C to 1900 DEG C, the flue gas flow rate generated in the combustion section reaches 120 m / s to 150 m / s; preheated anthracene oil is pumped into a throat section of the reaction furnace, the flow rate of the anthracene oil is 3500 kg / h to 4200 kg / h, the quality index of the anthracene oil is that: the mass ratio of toluene insoluble matter is less than or equal to 0.2%, density rho 20 at 20 DEG C is 1.13 g / cm<3> to 1.15 g / cm<3>, viscosity E80 is less than or equal to 2, the water volume ratio is less than or equal to 1%, the fraction before 210 DEG C is less than or equal to 1%, the fraction before 360 DEG C is more than or equal to 60%;cold water is sprayed to a quenching section of the reaction furnace to terminate the reaction of the anthracene oil in high temperature environment, the reaction time of the anthracene oil is 0.2 sto 0. 3 s. The carbon black obtained by the method has a moderate nitrogen adsorption specific surface area and particle strength, a high purity of carbon black, a good dispersibility of carbon black,a high degree of structure, and a low volume resistivity when carbon black is combined with EVA.

Description

technical field [0001] The invention and the carbon black production method particularly relate to a production method of the carbon black used in cable inner shielding materials. Background technique [0002] At present, in addition to the domestication of conductive carbon black for electronic components in my country, most of the carbon black used in rubber and plastics, fuel tanks, pipes, cables, etc. on the market still relies on imports, and the price is expensive. Especially in recent years, the demand for carbon black for conductive and static electricity in rubber and plastics in my country has grown rapidly. Compared with foreign countries, there is still a certain gap in the production technology, equipment level and product performance of this kind of carbon black in my country, mainly because there are more middle and low-end products, and the performance in terms of dispersibility and resistivity is still poor, and the product performance Unstable, high-end var...

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Problems solved by technology

Compared with foreign countries, there is still a certain gap in the production technology, equipment level and product performance of this kind of carbon black in my country, mainly because there are more middle and low-end products, and the performance in terms of dispersibility and resistivity is still poor, and the product performance Unstable, high-end varieties still occupy more market share abroad

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