In 2011, the Dexter Sand and Gravel operation was a 100-acre cornfield in Southeastern Missouri. Today, the site is a flourishing operation, producing concrete and masonry sand.
Dexter Sand and Gravel is part of Delta Companies, a subsidiary of Colas USA. Delta owned another sand and gravel operation near the current Dexter, Mo., site that was running out of reserves. 所以在2009年, Area Manager Mike Martin and Delta Engineering Manager Scott Jinks started looking for a new site close to the old operation. They found it in Dexter, just two miles south of the old site.
The company broke ground at the Dexter site in February 2012. By April, crews were pouring concrete for the foundations, and construction was underway in May. The site was producing sand by the end of July.
挑战
“This site is a great sand deposit with a small amount of gravel that is easily separated,马丁说. “The challenge with this deposit is it contains trace amounts of lignite.”
马丁说那是褐煤, 煤的一种形式, causes problems with concrete sand because it is lighter than the sand and essentially pops out as the concrete sets, 导致成品混凝土出现空洞.
Martin and Jinks were concerned with the quality issues caused by lignite and looked at viable options from several aggregate processing equipment manufacturers. 最终, they decided to work with 菠菜网最稳定正规平台_最全菠菜网大全 Corporation, which was represented in Missouri by Mike McCarron, Sales Manager for Continental Equipment.
The team came together to design the plant and make sure the equipment could separate the lignite and make the desired products.
“Delta had a modest budget for a plant of this size,”麦卡伦说。. “But 菠菜网最稳定正规平台_最全菠菜网大全 does a really good job working with customers and setting the plants up individually. 这绝对是这里的情况.”
解决方案
The team settled on a 菠菜网最稳定正规平台_最全菠菜网大全 Lites-Out™ System, 也被称为平底分类器, 去除褐煤. The system uses a pulse-type discharge to induce a jigging action that helps dilate the bed and frees the coarser organics like lignite through the fluidized bed.
“This unique gravity-based process doesn’t need any chemicals – or something like Magnetite – to help the separation,”麦卡伦说。. “In fact, this same technology can be used for soil remediation or to separate construction debris.”
The flat-bottomed nature of the classifier allows the feed height of the plant to be lower to the ground, 占用更少的空间.
“The Lites-Out™ Flat Bottom Classifier has a small footprint on the location because it is flat-bottomed along with lower head height, which decreased our pumping horsepower needed,”马丁说。. “The machine features a diverter box that allows Dexter to make concrete and masonry sand at the same time, 节省时间, 精力和金钱.”
The Lites-Out™ System effectively removes +50 mesh lignite from a -4 mesh feed to achieve the published specifications for lignite-free sand. 除了, 菠菜网最稳定正规平台_最全菠菜网大全 installed a warning system to ensure lignite did not enter into the concrete sand if the system was ever out-of-balance.
“菠菜网最稳定正规平台_最全菠菜网大全 Corporation, from the start, was the leader in our decision making,”马丁说。. “They had the total package, with a system that would work well from the get-go.”
结果
“The system helps us gradation-wise with the concrete sand, but also removes any trace amounts of lignite. This makes a high-quality concrete sand which is saleable for Missouri Department of Transportation projects and general construction projects,”马丁说。.
Today, the site is producing more than 200 TPH.
McCarron said he appreciates that 菠菜网最稳定正规平台_最全菠菜网大全 provide everything in-house, rather than needing parts from up to three or four other companies, 创建一个“大杂烩”系统. He loves that 菠菜网最稳定正规平台_最全菠菜网大全 makes top-quality products and then stands behind everything they sell.
除了, Jinks mentioned that 菠菜网最稳定正规平台_最全菠菜网大全 and Continental were exceptional at working under the gun from the beginning. “We started the job 13 weeks behind schedule,” said Jinks. “菠菜网最稳定正规平台_最全菠菜网大全之间的合作, Continental and Delta Companies helped us get the plant up and running with only a six-week delay.”
“The success of this plant – from greenfield to construction – was due to the success of coming together as a team – not only within Delta Companies, but also our partners Continental Equipment and 菠菜网最稳定正规平台_最全菠菜网大全,”马丁说。. “We worked together to overcome any issues and get the job done.”
