Rock Products

JUN 2018

Rock Products is the aggregates industry's leading source for market analysis and technology solutions, delivering critical content focusing on aggregates-processing equipment; operational efficiencies; management best practices; comprehensive market

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68 • ROCK products • June 2018 PRODUCTS Bulk Bag Conditioner The Block-Buster Hydraulic Bulk Bag Conditioner features a laser safety curtain that automatically stops the system's hydraulic rams, scissor lift and turntable if the laser beam is obstructed, eliminating the need for safety-hinged doors and interlock switches for oper- ator safety. The conditioner loosens densely packed bulk solid materials in bulk bags by means of hydraulic rams with specially contoured end plates that press and release opposing sides of the bag. A hydraulically actuated, vari- able-height scissor lift with accordion style dust skirt and turntable allows conditioning of the bag on all sides at all heights. The number and pressure of hydraulic ram actuations, the height of the turn- table, and the number of 90-degree rotations are user adjustable. The system controller and hydraulic pump can be mounted on the exterior of the frame or remotely. Available as a stand-alone unit or integral component of a bulk bag dis- charger, the unit measures 87- x 133- x 78-in., accommodates bulk bags of all popular sizes and requires only an elec- trical power connection for operation. Flexicon Corp., Innovation: Ash Grove Cement, Durkee, Ore. The cement plant was recognized for its installation of the first known full-scale application of a carbon absorption system on a cement kiln for control of mercury. From instal- lation in 2011 until 2017, Ash Grove has continued to make process and adsorbent changes to achieve the consistent level of 99 percent control necessary to achieve compliance with the Portland Cement National Emissions Standard for Hazardous Air Pollutants (NESHAP). Environmental Performance: LafargeHolcim, Holly Hill, S.C. The cement plant is an industry leader in resource conserva- tion with its practice of re-using, recycling, and co-processing recovered waste materials. The plant's waste recovery and utilization efforts span the entire manufacturing process from alternative raw materials to cement additives to alterna- tive fuel sources. Efforts to incorporate alternative materials have allowed the plant to expand its recycling capacity, make a meaningful impact on resource conservation and continue to produce a high-quality product. Land Stewardship: Cemex USA/Kosmos Cement Co., Louisville, Ky. The cement plant's efforts to provide and preserve habitat for the monarch butterfly has resulted in recognition for land stewardship. In 2017, the facility planted a native seed mix on about an acre of designated habitat land to provide food sources for the monarch butterfly. As a result of these efforts, the facility was presented with Gold Certification from the Wildlife Habitat Council, signifying the highest level of habitat and species conservation projects. Energy Efficiency: CalPortland, Oro Grande, Calif. In 2017, the plant installed two vibrating screens to allow smaller-sized crushed rock to bypass the secondary crusher to improve crushing efficiency. The plant also made multiple process changes to the raw mill circuit to increase efficiency and reliability. The new ball mill circuit was designed with new state-of-the-art energy efficiency technologies, including the use of mechanical cement conveyance over pneumatic conveyance. The Oro Grande plant achieved Energy Star cer- tification in 2017. Outreach: Titan America/Roanoke Cement Co., Troutville, Va. In 2017, RCC hosted on-site student conservation classes and sponsored stream cleanup events at Catawba Creek, which runs through the Troutville plant. Students collected stream data, such as sediment and nutrient information, to calculate a water quality value for the creek. The junior scientists will revisit the area and data will be archived to see how the water quality in the creek changes over time.

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