Ball Mill Lead Recovery Trommel Screen
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Firing ranges are contaminated with lead due to embedded projectiles, posing environmental and health risks, as existing methods fail to efficiently separate and recover lead from mixed materials like dirt, rocks, and debris.
Innovation Solution
A system comprising a trailer-mounted apparatus with a hopper, crusher, trommel screen, and ball screens, utilizing hydraulic motors and forced air to separate lead from other materials, where the trommel screen crushes and sifts materials, and ball screens use rotating stainless steel balls to crush and deform lead into sizes that can be collected separately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional manual collection methods are used for lead recovery, then operational simplicity is maintained, but separation efficiency and recovery completeness deteriorate
Solution Approach 1:
The system divides the lead recovery process into distinct functional segments: the trommel screen for initial size-based separation, the ball screen for density-based separation using steel balls, and the forced air system for light material removal. Each segment handles a specific aspect of separation, improving overall efficiency while maintaining manageable complexity through modular design
Solution Approach 2:
The ball screen serves multiple functions simultaneously: it acts as a crushing mechanism for oversized materials, a density separation device using steel balls, and a support structure for the forced air system. This multi-functionality improves productivity without requiring additional separate devices, thereby controlling system complexity
2Manufacturing precision
If ball screens are used to crush and deform lead, then separation precision improves, but energy consumption increases
Solution Approach 1:
The ball screen rotates periodically, creating cyclic crushing and deformation actions on the lead materials. This periodic motion allows materials to be processed in batches as they pass through the screen, achieving precise separation through repeated gentle deformation rather than continuous high-energy crushing, thereby controlling energy consumption while maintaining separation precision
Solution Approach 2:
The steel balls act as intermediary elements that transfer mechanical energy from the rotating ball screen to the lead materials. Instead of direct contact between the screen and materials requiring high energy, the steel balls mediate the crushing and deformation process, distributing energy more efficiently and reducing overall energy consumption while achieving the needed separation precision
3Productivity
If forced air is applied through the sleeve, then light material removal efficiency improves, but device complexity increases
Solution Approach 1:
The forced air system is merged with the existing ball screen structure, with air sources positioned to blow through the rotating sleeve. This integration allows light material removal to be accomplished using the same structural framework already in place, improving productivity without requiring a completely separate complex air handling system
Solution Approach 2:
The system uses pneumatic force from forced air sources to remove light materials from the processed debris. By utilizing air pressure and flow rather than mechanical scraping or picking devices, the system achieves efficient light material removal with simpler equipment, as pneumatic systems are inherently more straightforward than complex mechanical removal mechanisms
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
Effectively recovers lead from firing ranges by separating it from other materials, allowing for safe disposal or recycling, reducing contamination and environmental hazards.
Implementation Method 1
A source of forced air is arranged to force air through the interior of the rotatable sleeve
Implementation Method 2
The sleeve has a first end, a second end, and a wall with a plurality of apertures to permit material smaller than a first size to fall through the apertures
Data Source
AI summary
An apparatus for separating material includes a frame and a rotatable sleeve supported by the frame. The sleeve has a first end, a second end, and a wall with a plurality of apertures to permit material smaller than a first size to fall through the apertures. A source of forced air is arranged to force air through an interior of the sleeve.