CONEXPO – CON/AGG 2023

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Issue 11/2009

Brought into line

Rotor crushers for the production of sand and fine sand

Sand is a fundamental raw material component in the non-metallic minerals sector, as well as in the construction materials industry. In addition, sand is an important aggregate in concrete and mortar....

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Issue 11/2009

Optimized separation

Selected examples of the influence of cyclone underflow density to a closed circuit grinding system

1. Minimizing ultrafines in the hydrocyclone underflow The guideline to operate hydrocyclones at their lowest possible overflow density and their highest possible underflow density in closed circuit...

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Issue 11/2009

Grinding mill circuits – A survey of control and economic concerns

A survey of the current practice of process control and economic performance was carried out in 2007 (850 relevant professionals and 2 600 members of the South African Institute of Mining and...

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Issue 11/2009

Pioneer in asphalt recycling in Finland

Video: Plants of dsb Recycling asphalt is generally a difficult business. On the one hand, landfilling is very expensive and on the other hand ever fewer landfills are prepared to accept the slabs of...

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Issue 11/2009

XAR® in crushers and mills

Crushers and mills are used to comminute materials like rocks, deposits, and minerals, but also coal, waste or scrap. During comminution they are subject to wear and abrasion (from Latin abrasio...

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Issue 11/2009

Lead recycling with volume-flow-controlled compressed air station

With a new low-pressure compressed air station incorporating six speed-controlled, turbo-compressors work, the Weser-Metall GmbH lead works in Nordenham saves up to € 600 000 per year in energy...

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Issue 11/2009

Rotary tube equipment for calcining kaolin

In 2005 EMDE Industrie-Technik GmbH widened its established production range for handling bulk solids with rotary tube equipment for drying, firing, cooling and calcination, that is core components in...

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Issue 11/2009

Solving problems at a quartz processing plant

Extraction and production in harmony with man and nature is a principle that has been anchored in the corporate mission statement of Dörentrup Quarz GmbH & Co KG in Duingen since its founding....

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Issue 11/2009

Grinding and classifying installation for kieserite production

Potassium chloride, a fertilizer known as potash for short, is commonly found as a salt mineral and is extracted underground by mining methods. In Germany the crude potash salt often contains...

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Issue 11/2009

Flexible, fast and reliable

The earth-moving specialist Martin Fragner and his team, based in Rappottenstein/Lower Austria, is certified to undertake all types of blasting work, which are the first necessary step in many...

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