Central chain bucket elevators and belt bucket elevators for PT Semen Tonasa

The cement manufacturers PT Semen Tonasa and Gresik rely on BEUMER bucket elevators (Fig.) and are providing their plants in Tonasa and Tuban/Indonesia with one kiln line each. BEUMER was awarded the contract for the manufacture of six central chain bucket elevators and four belt bucket elevators by Loesche GmbH, who supply the clinker grinding plant. The use of these systems will permit PT Semen Tonasa and Gresik to benefit from low operating costs, high reliability and long running time. The commissioning of both kiln lines will take place in summer 2011.


Two central chain bucket elevators, with a bucket width of 400 mm and height of 42.5 m each, will be installed as recirculating bucket elevators in the vertical Loesche mills, type LM 56.3+3, in the Tonasa plant. These central chain bucket ­elevators achieve a conveying capacity of 75 t/h. In addition, two high-capacity belt bucket elevators, with a height of 74 m, a bucket width of 630 mm and a conveying capacity of 315 t/h, will be installed for feeding the silos.


The Tuban plant will be equipped with two high-capacity belt bucket elevators, with a height of 69.5 m and a bucket width of 630 mm each, for the feeding of silos. The conveying capacity of each bucket elevator is 315 t/h. Two central chain bucket elevators with a height of 42.6 m each and a bucket width of 630 mm will be installed as recirculating bucket elevators in the vertical Loesche mills, type LM 56.3+3. The conveying capacity for recirculation and clinker transport is 400 t/h. Additionally, two central chain bucket elevators, with a height of 32.2 m, will be installed for the transport of materials containing additives (400 mm wide buckets, conveying capacity is 100 t/h. The material transported is a mixture of gypsum, trass and limestone. As the material has high moisture content and is therefore subject to caking, the buckets are provided with rubber bottoms, allowing the material to be easily removed from the buckets.


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