Recycled Raw Material Sampling via Segmented Crushing
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Solution Overview
Problem
Existing methods for sampling recycled raw materials containing valuable metals like gold, silver, copper, and palladium face challenges in finely pulverizing components other than scrap iron and aluminum due to their high ductility, leading to inaccurate and non-uniform analysis samples.
Innovation Solution
A sampling method that separates recycled raw materials into scrap iron, scrap aluminum, and other components, followed by primary and secondary crushing and sample reduction processes, ensuring the other components are finely pulverized without being affected by the ductile metals, and mixing them according to weight ratios to achieve uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If common pulverizers (double roll crusher or rotary crusher) are used to pulverize recycled raw material, then the pulverization process is simple and easy to operate, but scrap iron and aluminum having high ductility cannot be finely pulverized, and other components cannot be finely pulverized either
Solution Approach 1:
The pulverization process is segmented into two independent stages: first pulverizing scrap iron and aluminum separately using appropriate crushers, then pulverizing other components using an impact-type pulverizer. This segmentation allows each stage to be optimized for its specific material type, achieving fine pulverization of all components without requiring a single complex device that can handle all materials effectively.
Solution Approach 2:
The invention dynamically adjusts the pulverization approach based on material composition. By separating ductile metals (scrap iron and aluminum) from other components and applying different pulverization methods to each, the system adapts to the specific properties of different materials, enabling fine pulverization of all components while maintaining operational simplicity through standardized processing steps for each material type.
2Manufacturing precision
If scraping iron and aluminum are separated and processed separately, then the analysis sample uniformity is improved, but the sampling and processing time increases
Solution Approach 1:
The sampling and processing procedure is segmented into distinct stages: separation of scrap iron and aluminum, followed by targeted pulverization of each component type. This segmentation enables parallel processing of different materials through standardized procedures, reducing overall processing time while maintaining the uniformity benefits of separate handling. Each segment has optimized time requirements, and the cumulative effect is efficient processing without sacrificing sample quality.
3Manufacturing precision
If impact-type pulverizer is used to finely pulverize recycledraw material, then the pulverization fineness is achieved, but the processing amount is extremely small and not suitable for automatic analysis sample collection
Solution Approach 1:
The invention segments the processing load by material type: scrap iron and aluminum are processed in larger quantities using conventional crushers designed for high throughput, while impact-type pulverizers are used only for the smaller quantity of other components that require fine pulverization. This segmentation allows the system to achieve fine pulverization where needed while maintaining high overall processing capacity through efficient handling of bulk materials with appropriate equipment.
Solution Approach 2:
Instead of using impact-type pulverizers for all materials (which would be excessive and reduce productivity), the invention applies partial action by using these high-precision devices only for the specific fraction of materials (other than scrap iron and aluminum) that require fine pulverization. This partial application maintains productivity by avoiding unnecessary complex processing of materials that can be handled by simpler, higher-capacity equipment.
Data Source
AI summary
Provided is a sampling method of recycled raw material, the method including: a process (S3) of primarily crushing recycled raw material; a process (S4 to S7) of separating primarily crushed raw material into three components, "scrap iron", "scrap aluminum", and "recycled raw material component other than scrap iron and scrap aluminum" and performing primary sample reductions of the three components; a process (S8 to S10) of secondarily crushing "the recycled raw material component other than scrap iron and scrap aluminum", which is subjected to the primary sample reduction, and performing a secondary sample reduction of "recycled raw material component other than scrap iron and scrap aluminum" which is secondarily crushed; a mixing process (S12) of mixing "scrap iron" and "scrap aluminum" with "the recycled raw material component other than scrap iron and scrap aluminum" which is subjected to the secondary sample reduction at a mixing ratio corresponding to a weight ratio of "scrap iron", "scrap aluminum", and "the recycled raw material component other than scrap iron and scrap aluminum", in which a mixture obtained in the mixing process is set as an analysis sample.