Planung und Durchführung einer systematischen Parameterstudie an einem innovativen Zerkleinerungsaggregat zur Erzeugung qualitativ hochwertiger Feinkalkprodukte

Translated title of the contribution: Planning and implementation of a systematic parameter study on an innovative comminution unit for the production of high quality fine lime products

Martin Auer

Research output: ThesisMaster's Thesis

Abstract

In this master thesis, a systematic parameter study was carried out on a recently installed comminution unit for the production of high-quality fine lime products. The comminution unit is the Ecopulser Twin by Krause Maschinenbau GmbH, which can be used both for single-stage comminution (parallel mode) and with minor adaptations also as a two-stage comminution unit (serial mode). The Ecopulser Twin has recently been added to the fine lime processing plant and has been put successfully into operation. The systematic parameter study aimed at finding favorable settings and exploring process engineering limits for both single-stage and two-stage operation. As goals to be achieved, the highest possible Blaine surface enlargement and a k80-value of less than 45 μm were defined. Furthermore, in the systematic parameter study only burnt lime should be used as feed, without addition of rock dust, to be able to measure the improvement of the reactivity of the fine lime product. The parameter study has shown that high-quality fine lime products can be produced with the Ecopulser Twin in parallel mode if operated at high throughput, high rotational speed of the rotors, and a narrow gap width of the preceding roll crusher. Statistical evaluation of the experiment has shown that at a feed rate of 10 t/h, a rotor speed of 2940 rpm (80% of maximum rotor speed), and a roll crusher gap width of 4 mm a fine lime product with a Blaine surface of 6341 cm²/g and a k80-value of approximately 46 μm can be produced. A comparison with the current default settings indicates that the Ecopulser Twin is already being operated close to optimal conditions. The parameter study of the parallel mode has shown that an increase of the product quality is still possible. The systematic parameter study in serial mode confirmed the results of the parameter study in parallel mode. At maximum feed rate of 5 t/h, a rotor speed of 2940 rpm (80% of maximum rotor speed), and a roll crusher gap width of 4 mm, a fine lime product with a Blaine surface of 6283 cm²/g and a k80-value of approximately 35 µm can be produced. Thus, the target k80 was not only met, but clearly surpassed in this setting. Depending on the burnt lime feed and the applicable product specifications, the suitable operational mode (serial or parallel) and settings can be chosen. The energy-saving and low-wear operation of the Ecopulser Twin subsequently results in significant savings in operational costs. As evaluation of the tumbling screen fed by the Ecopulser has resulted in a very steep performance curve, the product fineness could be increased even further by installing finer meshes.
Translated title of the contributionPlanning and implementation of a systematic parameter study on an innovative comminution unit for the production of high quality fine lime products
Original languageGerman
QualificationDipl.-Ing.
Awarding Institution
  • Montanuniversität
Supervisors/Advisors
  • Flachberger, Helmut, Supervisor (internal)
Award date29 Jun 2018
Publication statusPublished - 2018

Bibliographical note

embargoed until 01-06-2020

Keywords

  • parameter study
  • process optimization
  • comminution

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