Air Classifying Recovered Carbon Black to Reduce Ash
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Solution Overview
Problem
Recovered carbon black (rCB) from pyrolysis of waste materials contains high ash content, which negatively affects its performance in applications such as rubber articles, necessitating a method to reduce this content.
Innovation Solution
The method involves subjecting rCB to an air classifying unit, utilizing a classifying wheel or cyclone unit to separate and reduce the ash content, resulting in treated carbon black with improved properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If pyrolysis process is used to produce recovered carbon black from waste materials, then carbon black can be obtained for reuse, but the ash content increases which negatively affects performance
Solution Approach 1:
The patent applies extraction by introducing an air stream through a classifying wheel to remove ash particles from recovered carbon black. The air stream selectively entrains and separates lighter ash particles from heavier carbon black particles, effectively extracting the harmful ash component while preserving the useful carbon black for reuse in rubber articles.
2Reliability
If air classifying is applied to reduce ash content, then performance in rubber articles is improved, but additional processing step is required
Solution Approach 1:
The patent employs pneumatic principles by using a controlled air stream passing through the classifying wheel to achieve particle separation. This pneumatic approach allows for effective ash removal without requiring complex mechanical separation devices, maintaining relatively simple processing while significantly improving the reliability and performance of the treated carbon black in rubber article applications.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The treated carbon black exhibits reduced ash content and enhanced performance in rubber articles, demonstrating improved tensile strength, tear resistance, and abrasion resistance.
Implementation Method 1
The method involves subjecting rCB to an air classifying unit, utilizing a classifying wheel or cyclone unit to separate and reduce the ash content
Implementation Method 2
subjecting the recovered carbon black of step (A) to an air classifying unit (602)
Data Source
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AI summary
The present invention relates to a method for the treatment of recovered carbon black by air classifying. It has surprisingly found that the ash content of the recovered carbon black can be reduced by air classifying. The treated carbon black by air classifying can be beneficially used to produce rubber articles.