Loesche sells 400 vertical roller mills for cement and granulated blast furnace grinding

The most recent CS mills, 2x LM 53.3+3 CS, were sold to the Pakistani cement manufacturer, Kohat Cement Company Ltd. The plant is expected to produce 210 tph of portland cement at a fineness of 9% R 45 µm.

"With the M+S technology, we have been able to fulfil the industry's need for a reliable and energy-efficient solution in the production of very fine cement and aggregates" explains Dr Thomas Loesche, who is leading the third generation of the family enterprise."Over 400 plants sold is a great success but we will not rest on our laurels. It is our motivation to always think one step ahead into the future and to find solutions which helps our customers."

With the M+S technology developed by Loesche, these mills separate the preparation and grinding stages of the process and established an entirely new grinding-roller concept. Technically, a corresponding number of preparation or support rollers are implemented in the grinding or master rollers, that take over the grinding bed preparation (the 2+2, 3+3 or 4+4 technology depending on the throughput). As a result, the specific properties of the very fine material can be reliably controlled. With this invention, Loesche has, for decades, been in the position to replace conventional grinding technology in the cement industry with vertical air-swept grinding mills. The fact that this technology is also used in the grinding of steel slag is also a success for Loesche.

The 2+2, 3+3, and 4+4 technology in the M+S system offers a great range of advantages in comparison with conventional grinding systems:

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• Significantly higher grinding pressure.
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• Variable grinding pressure while the grinding plant is running and thus quickly adapt to grinding material changes.

   

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• Very low differential speed between the grinding track and the conical, friction driven roller.
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• Lower specific wear during pulverisation.
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• Compact construction due to the combination of the crushing, grinding, sorting, drying and classification process stages.
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• Noticeable energy saving in comparison to alternative/conventional grinding systems.

   

Further advantages result from the grinding of blast furnace slag:

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• Steep product particle size distribution.
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• Avoidance of ineffective product over-grinding.

"Not only does the high number of sales speak for LOESCHE mills, but also especially the high number of repeat orders", says Thomas Fahrland, Loesche Sales Manager. "The economic advantages of our mills are becoming increasingly important in larger plants. Furthermore, the high operational flexibility of our units enables the grinding of all products required on the market. A quicker transformation of OPC cement into all qualities of composite cement is possible, quickly and problem-free at any time without losing efficiency".

Read the article online at: https://www.worldcement.com/product-news/14062018/loesche-sells-400-vertical-roller-mills-for-cement-and-granulated-blast-furnace-grinding/