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Launched in 1916, Pit & Quarry magazine serves the multi-billion-dollar aggregates mining industry. It offers its readers informative articles about the equipment and technology used by producers of crushed stone, sand and gravel. Pit & Quarry’s editorial content is based on extensive reader research. The editorial staff covers the industry from the field, traveling thousands of miles each year to visit quarries, sand and gravel plants, and attend industry trade shows and conferences. With editorial offices in Cleveland and an experienced staff of contributing writers, Pit & Quarry has more editorial resources at its disposal than any other aggregates industry magazine. First launched in 1996, Pit & Quarry’s web site has become the leading online information source for aggregates producers. Using the latest technology, it provides visitors the most current and comprehensive information possible.

Kleemann: Mobicone MCO 11

The Kleemann Mobicone MCO 11, a new 300-tph tracked mobile cone crusher, is now available for North America. With a 44-in.-diameter cone crusher as its core, the Mobicone MCO 11 provides high-performance secondary or tertiary crushing. Its 15.7-cu.-yd. large feed hopper is designed for direct feed from a primary crusher, or by wheel loader. The MCO 11 can accept feed of up to 10x10 in. in size. A variable-speed drive controls material flow from hopper into cone crusher, via a solid rubber belt 40 in. wide. It’s fed by a performance-boosting vibratory feeder, featuring special wear sheets that help prolong feed belt life. To easily service the cone assembly and for transport, the feed conveyor can be retracted. Kleemann.info/en Photo: Kleemann Keep Reading

Campaign promoting use of hearing protection

3M has launched a social campaign called the Hearing Pledge, aiming to educate people on how to detect and help protect them from hazardous noise. Anyone can take a pledge at www.hearingpledge.com, where a commitment to wearing hearing protection when exposed to noise in excess of 85 decibels can be made. According to 3M, prolonged exposure to sounds louder than 85 decibels can damage a person's ears and lead to permanent hearing loss and other symptoms. People can also share the pledge site with friends and family. Those who pledge can opt to enter a giveaway, with prizes such as an iPod touch mobile digital device and sound control earbuds. “Many workers choose to go without hearing protection because of discomfort or inconvenience,” says Laurie Wells, 3M's senior acoustics specialist. “This can lead to permanent hearing loss, as well tinnitus – constant ringing, buzzing or whistling in the ear – and a myriad of other effects like sleep disturbance, hypertension, anxiety and stress. That’s why raising awareness of the hearing-loss… Keep Reading

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