| In a quarry in Louisville, Nebraska, a Wirtgen Surface Miner 280 SM(i) is being used for the layer-by-layer and particularly environmentally friendly extraction of limestone from previously undeveloped reserves. Limestone for the production of cement has been quarried here in Louisville since 1929. The extraction of the material in the quarry was contracted out to North American Mining (NAM). The limestone reserves in the quarry in Louisville are by no means exhausted, even though it has now been in operation for almost 100 years. The geological situation, however, has made extraction a more difficult task, as the remaining limestone strata are interlayered with shale. Due to this, quarrying with conventional methods such as drilling and blasting would have led to contamination of the material. The Ash Grove Cement Company therefore decided to use a Wirtgen Surface Miner from NAM for the job. As the 280 SM(i) enables selective extraction of the primary resource, it can guarantee outstanding material purity and is the ideal choice for projects in areas with sensitive infrastructures.
Clean separation of limestone, shale and waste rock The use of Surface Miners opens up entirely new opportunities for the extraction of limestone in the quarry at Louisville. The extraction of the material takes place in a selective, layer-by-layer process: The valuable limestone resource is cleanly separated from waste materials such as shale before crushing with extremely high output and efficiency. Considering a compressive strength of 110 MPa (16,000 PSI) for the limestone here, the 280 SMi achieves a mean cutting rate of approximately 400 t/h – with 87.5% of the material produced in the process being crushed into pieces smaller than the specified maximum size of 7.6 cm. In the waste rock (shale and overburden), the machine achieves a mean cutting rate of approximately 650 t/h. The cut and crushed material is loaded directly into 70-ton dump trucks driving alongside the Surface Miner. The process is fast and continuous, with a fresh truck being filled with crushed limestone every four minutes – around the clock, five to six days a week.
Minimal wear and exceptional manoeuvrability Environmentally friendly technology More information: https://www.wirtgen-group.com/ocs/en-us/wirtgen/280-smi-184334-p/
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New Kleemann Plant Marks Commitment to Industry
In early 2010 Kleemann GmbH completed its new headquarters and state-of-the-art manufacturing plant near Göppingen, just east of Stuttgart in south-central Germany.
The new plant marks Kleemann’s commitment to the minerals processing industry and incorporates the highest production technologies for the manufacture of aggregates and minerals processing equipment.
This new “greenfield” manufacturing plant is making Kleemann mineral processing equipment more available, and will speed product delivery in North America in coming months. “With 350,000 sq. ft. of production area and 40,000 sq ft of administration area, Kleemann will excite the market with new models and features for 2010,” said Evan Clarke, vice president.
For over 150 years Kleemann has led the minerals processing industry with design ingenuity, producing crushing and screening equipment for many leading markets. Since being acquired by the Wirtgen Group in 2006, the company has experienced dramatic growth which has led to reinvestment by the group to help streamline production and allow for greater volume for its new expanding markets.
“As Kleemann gathers momentum within the United States and Canadian markets, and new dealers take on the product line, many customers are seeing the ‘Kleemann Advantage’,” Clarke said. “We bring to the market a wide range of track mobile crushers and screens with many unique features.”
The new plant utilizes the most modern German high-tech manufacturing processes, including short internal product assembly lines. On the new 1.34 million sq. ft., site, the new manufacturing facility covers an area of 376,736 sq. ft., complemented with a 43,055 sq. ft. administration building. The oversized interior capacity of the new main production facility accommodates the enormous dimensions of Kleemann’s largest crushing and screening machines.
In the plant’s central warehouse contains two storage zones in which some 10,000 items are stocked. “On average, 200 items with a total weight of 8.8 tons are handled here each day,” said Kleemann central warehouse manager Martin Zemmel. “We really benefited from the know-how of the other Wirtgen Group companies when building our new facility.”
Kleemann’s new painting facility for large parts is one of the largest such facilities in Germany, with a tremendous load-bearing capacity of 33 short tons, and around 21,500 sq. ft. of floor space. Kleemann’s switch-over from wet spray painting to powder-coating not only marks a major step towards boosting surface quality, but also has far less of an environmental impact, with the system far exceeding the requirements of the EU environmental guidelines.
Kleemann’s Roots Run Deep
Kleemann is a newcomer to the North American aggregate processing market, but its roots lie deep. Established in Germany in 1857, Kleemann was acquired by Wirtgen Group in 2006. Today, a growing network of equipment distributors and dealers is enabling Kleemann Inc. USA to boost its domestic profile and serve customers in North America.
Today Kleemann manufactures and markets a broad range of durable, productive mobile and stationary processing equipment and technology for crushed stone, demolition waste and mixed construction waste.
Kleemann’s product brand names are:
• The MOBICAT mobile primary jaw on crawler chassis with feeding unit, pre-screen and conveyors built in various sizes ranging from 100-1,000 tph capacity
• The MOBIREX mobile primary impactor on crawler chassis with feeding unit, pre-screen and conveyors built in various sizes ranging from 100 to 1,000 tph capacity
• The MOBIFOX mobile secondary crushing machines with feeding unit, impact crusher and a screen producing up to 3 grain sizes
• The MOBICONE mobile secondary crushing machines with feeding unit, cone crusher and a screen to produce up to 3 grain sizes, and
• The MOBISCREEN mobile screening machines, producing up to 4 grain sizes with fixed or swiveling discharge belts, with a screening surface dependent on ultimate use.
BACKGROUNDER
Wirtgen America, Inc., Nashville, is the North American arm of the Wirtgen Group, the single-source marketer of the world’s most technologically advanced lines of asphalt reclaiming/recycling and concrete slipform equipment from Wirtgen, asphalt and soil compactors from Hamm Compaction Division, asphalt pavers from Vögele America Inc., and aggregates and minerals processing equipment from Kleemann.
In late 2004 Reinhard Wirtgen, founder of Wirtgen Group, was honored as one of the “Top 100 Private Sector Transportation Design & Construction Professionals of the 20th Century” by the American Road & Transportation Builders Association (ARTBA).
