System and method for preparing carbon black from waste tires by using pyrolysis
AssigneeLd Carbon Co., Ltd.
InventorsYoung Kyung Hwang, Seong Mun Baek
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Abstract
A method for preparing carbon black according to the present invention comprises the steps of: pyrolyzing by heating waste tires; separating char in the pyrolyzed material from an iron-containing foreign substance; pulverizing the char into fine particles or fine powder to form carbon black; pelletizing the carbon black; cooling and drying the pelletized carbon black; and packaging the pelletized carbon black, wherein the pyrolyzing step comprises: a primary pyrolysis step of heating waste tires; and a secondary pyrolysis step of heating char and iron in the primary pyrolyzed material, and the heating temperature of the secondary pyrolysis step is higher than the heating temperature of the primary pyrolysis step.
Claims13
A method of preparing carbon black, comprising:
- performing a primary pyrolysis step of heating waste tires to produce first pyrolyzed substances comprising char and iron at a first pyrolysis unit;
- transferring the first pyrolyzed substances from the first pyrolysis unit to a second pyrolysis unit;
- performing a secondary pyrolysis step of heating the char and the iron of the first pyrolyzed substances to produce second pyrolyzed substances, at the second pyrolysis unit;
- separating the char from the second pyrolyzed substances;
- pulverizing the separated char through any one of a ring roller mill, an air classifier mill (ACM), or a raymond mill to a particle size of 80 μm or less;
- pulverizing the separated char a second time through a ring roller mill or an ACM to a particle size of 10 μm or less to form carbon black;
- pelletizing the carbon black, wherein in the pelletizing, a composition for pelletizing includes carbon black of 75 to 85 wt % and ash and inorganic additives of 15 to 25 wt %;
- cooling and drying the pelletized carbon black;
- and
- packaging the pelletized carbon black,
- wherein a heating temperature of the secondary pyrolysis step is higher than a heating temperature of the primary pyrolysis step.
A method of preparing carbon black, comprising:
- performing a primary pyrolysis step of heating waste tires to produce first pyrolyzed substances comprising char and iron at a first pyrolysis unit;
- recovering oil by condensing oil vapor generated in the primary pyrolysis, and reusing non-condensable gas that has not been condensed as a heat source for the primary pyrolysis;
- transferring the first pyrolyzed substances from the first pyrolysis unit to a second pyrolysis unit;
- performing a secondary pyrolysis step of heating the char and the iron of the first pyrolyzed substances to produce second pyrolyzed substances, at the second pyrolysis unit;
- ;
- separating the char from the second pyrolyzed substances;
- pulverizing the separated char through any one of a ring roller mill, an air classifier mill (ACM), or a raymond mill to a particle size of 80 μm or less;
- pulverizing the separated char a second time through a ring roller mill or an ACM to a particle size of 10 μm or less to form carbon black;
- pelletizing the carbon black, wherein in the pelletizing, a composition for pelletizing includes carbon black of 75 to 85 wt % and ash and inorganic additives of 15 to 25 wt %
- cooling and drying the pelletized carbon black;
- cooling and drying the pelletized carbon black;
- and
- packaging the pelletized carbon black.
Dependencies are inferred from the claim text.