A green company finds a screening solution for end-of-life tire processing.
Ensuring optimal and sustainable screening equipment processes and productivity is vital for many processing industries. When investing in expensive capital screening equipment, it’s critical to remove any guesswork to make sure the investment will pay off. Conducting screening equipment testing can provide customers with essential quantitative data to make the best decision for their application.
Midwestern Industries, Massillon, OH, is a screening equipment manufacturer that offers a full-size testing facility with ISO 9001:2015 certification where clients can see how the equipment handles their material.
The supplier recently conducted a real-time, full-scale material test for a green technology client. The client needed a screener to aid in material recovery from end-of-life (EOL) tires. The client had been experiencing consistency issues. The client’s previous screening system wasn’t processing the material consistently, resulting in several problems, including large chunks and contamination issues as the recovered materials slipped through the old screener.
Tests were conducted at the supplier’s recently expanded 10,000-square-foot test facility. Staff members worked closely with the client’s superintendent to find a way to separate ground rubber material from carbon black and other chemicals recovered from EOL tires.
Midwestern’s client wanted to efficiently achieve profitable reclamation of all materials resulting from EOL tire recycling. To find the right equipment to consistently screen a material blend of rubber aggregates and fine powders from 20 microns, the client took part in a 3-week-long testing process that began with a screening questionnaire. Preliminary questions cover target material size, cut size, feedrate, bulk density, moisture content, feed gradation, and more to help the supplier create the testing parameters. The client sent a 55-gallon drum of its material to be test-screened or -separated, and feasibility tests were performed on various types of screeners and separators, including round, rectangular, and others.
Tests were performed by running several material blends with different particle sizes and compositions to find the optimal material to feed into the machines. This process can help clients determine which blend produces the highest quality end product. Tests using bulk bags can also be performed to see if screening will help create an optimal end product. At the supplier’s test center, all tests are performed on full-size equipment to simulate the client’s application as closely as possible. Due to the size of the material and feedrate this customer required, the supplier suggested an MEV series high-frequency screener. The 5-by-10-foot rectangular screener features five screening decks that are able to separate the material into one to five different particle sizes. The MEV provides high volume fine mesh screening, which is required for many applications in the quarry and rock, sand and gravel, pet food, clay, brick, and lime industries, among others.
The MEV uses an elliptical motion to move material across its screening surface, and the screener retains material at the feed end for a period of time before the material is gently discharged off the screening deck and onto the next production stage. Crossbars support the end-tensioned screens to create a flat screening surface, which maximizes the screening area.
The material testing on the MEV screener was completed within a few hours with the client in attendance on-site, which provided an opportunity for the client to learn more about the screener’s performance. If a customer is unable to attend a test, the supplier can provide a live video call or recorded testing video. The customer also receives several testing result sheets, including a sieve analysis, rate sheet, feedrate percentages, and more process calculations. The supplier also has an archived library of ‘blind/confidential’ test result video samples to streamline customer education.
After reviewing the testing process and results, the green-focused client purchased the MEV screener for its EOL tire recycling operation. The new equipment provides the company with an efficient screening solution that preserves the recovered carbon black material’s properties. The screener requires minimal maintenance outside of new screens. The screen replacement frequency depends on the material. An abrasive material will wear out the screens more quickly than a gentler material. The application’s feedrate also dictates the screen’s lifespan, and the supplier can provide a maintenance plan depending on each client’s application and material.
For further reading
Midwestern Industries • Massillon, OH
877-474-9464 • www.midwesternind.com
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