Specifications for a Low-Cost Used Wire Grinding Mill for Separating Copper from Plastic

Introduction

A used cable mill for grinding small to medium-sized cables, designed to be economical and efficient, is an essential tool for recycling electrical cables. This type of mill is particularly useful for separating copper from plastic, optimizing the recovery of precious metals and improving the efficiency of the recycling process.

Structure and Components

Wire grinding mills generally include the following components:

1. Mill Body : Made of sturdy steel, the body is designed to withstand the grinding process and resist wear. The structure may vary depending on the brand and model, but it is generally compact and sturdy.

2. Grinding Rollers : Rollers or blades are used to shred cables. They can be designed with different types of teeth or blades depending on the type of cable being treated and the desired particle size.

3. Feeding System : Allows the wires to be inserted into the mill. Some models may have an automatic feeder, while others require manual feeding.

4. Separation System : After grinding, a separation system, such as a vibrating screen or eddy current separator, is used to separate the copper from the plastic. This system is crucial for obtaining pure, valuable materials.

5. Motor and Transmission : Provides the power needed for grinding. Motor power can vary depending on the mill's capacity, but is generally adequate for the size and type of wire being processed.

6. Material Discharge : The ground materials are discharged through an outlet, often equipped with a collection system to facilitate the management of the separated material.

Technical Characteristics

• Grinding Diameter : Suitable for small and medium sized cables.
• Grinding Capacity : Varies by model, but generally adequate for small to medium volumes of cables.
• Separation System : Includes technologies to effectively separate copper from plastic, such as eddy current separators or vibrating screens.
• Motor Power : Typically between 5 and 30 kW, depending on mill size and grinding capacity.

Usage Procedure

1. Installation : Place the mill on a stable, level surface. Make sure the material discharge system and electrical connection are correct.

2. Cable Preparation : Remove connectors or non-metallic parts from the cables, if necessary. Cables should be clean and ready for insertion.

3. Loading : Insert the cables into the mill's feed system. If the mill is equipped with an automatic feeder, load the cables into the feed tank.

4. Setup and Startup : Adjust the mill settings according to the manufacturer's specifications, including speed and grinding type. Start the mill and monitor the grinding and separation process.

5. Separation and Collection : The ground materials pass through the separation system. The separated copper and plastic are collected in separate containers for recycling or reuse.

6. Shutdown and Maintenance : After use, turn off the mill and clean the work areas. Perform regular maintenance to ensure optimal operation of the mill.

Accessories and combinations

• Suction System : To remove dust and small residues generated during the grinding process.
• Conveyor Belt : To facilitate the transport of cables to the mill.
• Maintenance Kit : Includes tools and spare parts to keep your mill in good operating condition.

Formulas and Parameters of Optimal Use

1. Grinding Speed ​​(V) : Adjust the speed of the rollers according to the type of wire and the capacity of the mill. The basic formula for calculating speed is:

   $$V$$

   where NN $N$ is the number of revolutions per minute and DD $D$ is the diameter of the roller.

2. Grinding Capacity (C) : Determine the capacity based on the size of the wires and the power of the motor:

   $$C$$

   where PP $P$ is the engine power, tt $t$ is the operation time and RR $R$ is the mill efficiency.

3. Separation Efficiency : Monitor the efficiency of the separation system to ensure that copper and plastic are separated properly.

Maintenance

To keep your mill in tip-top condition:

• Regular Cleaning : Remove residual materials and dust from the mill and surrounding areas.
• Component Inspection : Check the rollers and separation system for wear. Make any necessary replacements and repairs.
• Engine Maintenance : Check that the engine and electrical parts are working properly.

Evaluation of used cars

When evaluating a used mill:

• General Conditions : Check that the mill is in good aesthetic and functional condition.
• Separation System Functionality : Make sure your copper-plastic separation system is operational and in good working order.
• Engine and Component Condition : Check the operation of the engine and other major components.

Sectors of Use

The Mill Used for Grinding Cables is used in:

• Recycling Sectors : For the recovery of copper and plastic from disused cables.
• Metalworking Industry : For the treatment of cables and metal materials.
• Electronic Waste Management : For the recycling of electronic components that are no longer usable.

Advantages of Used Equipment

Buying a used mill offers:

• Lower Cost : More competitive price than a new one.
• Reliability : If well maintained, a used mill can offer excellent performance.
• Immediate Availability : It could be ready for use without long waits.

In short, a used cable mill is a beneficial choice for cable recycling, offering effective recovery of copper and plastic. Choosing a used mill can be a cost-effective option, as long as it's in good condition and properly maintained.