Rock Products

MAR 2019

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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www.rockproducts.com ROCK products • March 2019 • 27 • Krebs G Max cyclones. • McLanahan sand screws (see photo at left). • Azfab and McLanahan thickeners. • Square D MCC. • Lightening Masters lightening protection. • Toshiba VFDs. Balcones had two existing McLanahan Twin 44-in. screws on the property operating continually with good results, and it only made sense to move these to the new sand plant for continued trouble-free operation. The wash plant process flow works like this. The fully auto- mated water recycling and sand plant receives its process water from the Balcones wash plant. The process water, which contains all the underflow from the wash plant, is first pumped through twin Schurco 10 x 12 pumps to four Abresist cyclones for the processing of manufactured sand. The nearly on-spec sand from the cyclones gets its final cleaning from within the McLanahan sand screws. The underflow from the Abresist cyclones and sand screws is then pumped from another set of Schurco pumps into the Krebs G-Max cyclones for the production of an ultra fine limestone product. The final underflow produced from the ultra fine cyclones flows via gravity to both thickeners for final densification and storage. Cemex's efforts to achieve environmental excellence were recently honored by Texan by Nature, a Texas-led con- servation non-profit founded by Former First Lady Laura Bush. The company was recognized for its ongoing com- mitment to sustainability and land preservation through the El Carmen Land and Conservation Co. LLC (ECLCC), a partnership that oversees the U.S. portion of El Carmen, a private trans-boundary nature preserve. ECLCC is a combined effort between Cemex and J. Austin Ranches. The Texan by Nature Conservation Wranglers program recognizes innovative and transformative con- servation projects in the state. ECLCC works to preserve approximately 27,000 acres of El Carmen within Texas. El Carmen is comprised of five different ecosystems, and its nearly 350,000 acres in Texas and Mexico is home to a myriad of plants, birds, mammals, reptiles and amphibians. Cemex has made important contributions to the continued scientific research, restoration, conservation, and increased population of endangered species and their habitats in this cross-border private conservation region. Another unique feature at Balcones Quarry is the Dry Comal Creek Wildlife Habitat Center. Cemex first began construc- tion on the habitat area five years ago. The 10-acre area includes a pollinator garden, a prairie res- toration area and honeybee apiaries. Lance Griffin, director of aggregate operations – Texas and New Mexico, said the project started as a simple nature trail and evolved. Cemex has also constructed a conference and event space on the grounds and a handicap-accessible greenhouse garden. Already, Cemex uses the space for school groups and also offers the space for use by non-profit and other organizations. Employees from Balcones hosted six Quarry Day educa- tional events last April, guiding 650 elementary and high school students through the quarry and teaching them how the limestone produced at the quarry is essential for build- ings and roads used every day. The tours ended at the Wildlife Habitat Center, where students learned about the onsite pollinator garden, prairie restoration project and other conservation efforts. Cemex has participated in the Southeast Monarch Initia- tive with locations throughout the migration path, including Balcones Quarry. Efforts to restore the Monarch popula- tion include planting milkweeds, native prairie-seed mixes, wildflowers and/or other plants beneficial to pollinators in designated onsite habitats and gardens. Environmental Excellence

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