Dolomite grinding in the Ukraine.
Summary: In summer 2009 a vertical roller mill, type LM 15.2, was successfully
commissioned for dolomite grinding in the Ukraine. This compact mill was set up at
Ternopolsky Karyer in Ternopol/Ukraine. It was ordered by OJSC Nadrabudinvest,
a Ukrainian company with a product range covering sugar, building materials and fertilizers.
Loesche GmbH is a leading supplier of coal grinding plants for coal gasification facilities. Coal preparation, including grinding and drying, is an integral but often underrated part of the gasification process that stands at the very beginning and influences the entire process. Loesche has extensive experience in this area, having supplied their first coal grinding plant for a gasification power plant in 1990. Their mills are able to achieve high throughputs of over 180 tons per hour to meet the demands of the gasification industry.
The document describes Loesche's Compact Cement Grinding (CCG) plant, a new small-scale cement production system. The CCG uses proven Loesche vertical roller mill technology in a compact modular form, allowing cement production in small and remote markets. Key advantages of the CCG include its flexibility to produce different cement types, ability to start production within a year, and potential to relocate the entire plant. Loesche offers full support services for the CCG from planning and installation to operation and maintenance.
Optimized Meal Distribution for Maximized Heat Transport - Simple from the outside, but essential for high heat recuperation in the preheater tower, the meal spashbox ensures an optimum meal distribution in the gas riser duct which ends at the inlet of the next preheater cyclone stage.
Loesche GmbH is a leading provider of vertical roller mill technology that has been in operation since 1906. They have continually advanced their roller grinding mill technology and now provide solutions for grinding cement, clinker, granulated slag, minerals, ore and coal. Loesche prioritizes high quality standards, economic efficiency, and meeting customer expectations by developing innovative plant concepts. They emphasize engineering precision, customer service and maintaining close relationships with customers around the world. Looking ahead, Loesche is working on a paradigm change in ore processing through new mill technology that can largely replace conventional methods and provide significant benefits.
Loesche Technology has been innovating in grinding mill technology since 1927. Key developments include the world's first spring-loaded air-swept mill, introduction of this technology to other industries like cement and ores, and development of highly efficient classifiers. Today Loesche provides vertical air-swept mills for raw materials, cement, slag, fuels, minerals and more. Their product line covers a wide range of throughput capacities.
Visual Communications at LOESCHE | DEKOM Case StudyLOESCHE
The global company's challenge: at LOESCHE, colleagues, partners, suppliers and customers are dispersed all around the world. To keep their business and projects running, the widespread placement of skills and functions, power and expertise requires the employees regularly to meet face-to-face, and thus valuable time and cost through travel.
The cement industry is worldwide one of the main contributors to man-made CO2 emissions, estimated at 7% of global emissions.
To keep pace with the demand and pressure to reduce CO2 emissions, a shift to sustainable building materials for housing and infrastructure must still be continued.
Cement manufacturers can make significant progress toward sustainability goals with alternative fuels and efficiency projects by reducing clinker content through cementitious additives (SCM).
Loesche GmbH is a leading supplier of coal grinding plants for coal gasification facilities. Coal preparation, including grinding and drying, is an integral but often underrated part of the gasification process that stands at the very beginning and influences the entire process. Loesche has extensive experience in this area, having supplied their first coal grinding plant for a gasification power plant in 1990. Their mills are able to achieve high throughputs of over 180 tons per hour to meet the demands of the gasification industry.
The document describes Loesche's Compact Cement Grinding (CCG) plant, a new small-scale cement production system. The CCG uses proven Loesche vertical roller mill technology in a compact modular form, allowing cement production in small and remote markets. Key advantages of the CCG include its flexibility to produce different cement types, ability to start production within a year, and potential to relocate the entire plant. Loesche offers full support services for the CCG from planning and installation to operation and maintenance.
Optimized Meal Distribution for Maximized Heat Transport - Simple from the outside, but essential for high heat recuperation in the preheater tower, the meal spashbox ensures an optimum meal distribution in the gas riser duct which ends at the inlet of the next preheater cyclone stage.
Loesche GmbH is a leading provider of vertical roller mill technology that has been in operation since 1906. They have continually advanced their roller grinding mill technology and now provide solutions for grinding cement, clinker, granulated slag, minerals, ore and coal. Loesche prioritizes high quality standards, economic efficiency, and meeting customer expectations by developing innovative plant concepts. They emphasize engineering precision, customer service and maintaining close relationships with customers around the world. Looking ahead, Loesche is working on a paradigm change in ore processing through new mill technology that can largely replace conventional methods and provide significant benefits.
Loesche Technology has been innovating in grinding mill technology since 1927. Key developments include the world's first spring-loaded air-swept mill, introduction of this technology to other industries like cement and ores, and development of highly efficient classifiers. Today Loesche provides vertical air-swept mills for raw materials, cement, slag, fuels, minerals and more. Their product line covers a wide range of throughput capacities.
Visual Communications at LOESCHE | DEKOM Case StudyLOESCHE
The global company's challenge: at LOESCHE, colleagues, partners, suppliers and customers are dispersed all around the world. To keep their business and projects running, the widespread placement of skills and functions, power and expertise requires the employees regularly to meet face-to-face, and thus valuable time and cost through travel.
The cement industry is worldwide one of the main contributors to man-made CO2 emissions, estimated at 7% of global emissions.
To keep pace with the demand and pressure to reduce CO2 emissions, a shift to sustainable building materials for housing and infrastructure must still be continued.
Cement manufacturers can make significant progress toward sustainability goals with alternative fuels and efficiency projects by reducing clinker content through cementitious additives (SCM).
Alternative Fuel Market After Covid-19 – Focus on Efficiency and QualityLOESCHE
Covid-19 has changed the way people interact with each other and the way business is done. Now is the time to change the paradigm regarding alternative fuel projects towards a more holistic approach in order to ensure investment efficiency. Simple and cheap (at first) shall give way to smart, flexible, and sustainable concepts. Suppliers shall give way to partners.
Article by Tais Mazza Joudeh, Head of Waste Conditioning, LOESCHE GmbH | Published on ZKG Cement Lime Gypsum Magazine, Issue 7-8 2020.
As ever-higher efficiencies are demanded of grinding equipment, cement plants require a new benchmark for grinding component performance. Addressing wear through regular maintenance and repair is one strategy with the sustainable supply of grinding parts and management of mill wear as key factors in keeping mills running.
By Dr Dorival G Tecco, Loesche GmbH, Germany.
Reprint from INTERNATIONAL CEMENT REVIEW, December 2017
Get Fit For The Future - Dry Ore Comminution TechnologyLOESCHE
Our dry comminution is flexible, sustainable and energy-efficient.
The LOESCHE layout characterizes through a compact design and hence a small plan footprint - ideal from brownfield, but also for greenfield projects.
The BinEX discharge system has major components that include an inner cone, silo floor, discharge arm, and drive system. The inner cone and silo floor work together to form a natural angle of repose that prevents uncontrolled bulk material flow out of the central outlet. The discharge arm rotates to convey bulk material to the outlet at a rate determined by its speed. The silo floor design avoids buildups of material at corners. The BinEX comes in various sizes to accommodate different capacities and dimensions for discharging bulk materials like cement, coal, and minerals from silos. Loesche is an engineering company that designs, manufactures, and installs bulk material handling systems including silo discharge equipment.
Dry Granulated BF Sand: A Groundbreaking and Sustainable InnovationLOESCHE
"Dry granulated BF sand: A groundbreaking and sustainable Innovation – Production process, product grinding and building materials investigations".
- Presentation by Thomas Fenzl, Primetal Technologies Austria, during the 14th Global Slag Conference, Exhibition & Awards.
26 - 27 March 2019, Aachen, Germany
Loesche-Separation Plant for Production of Ultrafine Granulated Blastfurnace ...LOESCHE
Presentation written by Horst Michael Ludwig; Bauhaus Universität Weimar, F. A. Finger-Institut für Baustoffkunde; Holger Wulfert, and Dr. Winfried Ruhkamp, Loesche.
Presented at the 14th Global Slag Conference, Exhibition & Awards.
26 - 27 March 2019, Aachen, Germany
The document discusses Loesche's expertise in waste conditioning and management. It describes stabilizing existing landfills by identifying factors contributing to instability and implementing countermeasures. It also discusses remediating existing landfills by recovering valuable materials, reducing landfill volume, and rehabilitating the area. Loesche offers complete treatment plants for municipal solid waste that produce fuels, compost, and recyclables using a modular system tailored to each project's needs.
Presentation by Michael Gramlin during the Symposium on Waste and Recycling Technology organized by AHK (Deutsch - Russische Auslandshandelskammer).
September 2018.
An Integrated Approach to Alternative Fuel use in Cement MakingLOESCHE
The world is facing a growing challenge with handling the ever-increasing tonnages of waste materials being produced, while at the same time environmental pressures are driving the push to reduce fossil fuel use in industrial processes. Cement production is no exception in this respect.
Published in www.zkg.de
This document summarizes a case study from Morocco on converting waste into a reliable fuel for co-processing. A waste assessment was conducted to analyze the composition and potential of municipal solid waste. A technical assessment of cement kilns was also performed to evaluate their suitability for co-processing waste. Based on the results, a pre-treating process was designed to produce alternative fuels of varying quality that could be used in the cement production process. With proper quality control and legal framework, the project demonstrated that combustible waste can be reliably used as fuel to reduce greenhouse gas emissions.
Optimal Alternative Fuel Burning Starts with Computer SimulationLOESCHE
Presentation by Matthias Mersmann, General Manager Business Development New Products at LOESCHE GmbH, during the LOESCHE Symposium in Hanoi, Vietnam, in August 22, 2018.
Alternative Fuel Market After Covid-19 – Focus on Efficiency and QualityLOESCHE
Covid-19 has changed the way people interact with each other and the way business is done. Now is the time to change the paradigm regarding alternative fuel projects towards a more holistic approach in order to ensure investment efficiency. Simple and cheap (at first) shall give way to smart, flexible, and sustainable concepts. Suppliers shall give way to partners.
Article by Tais Mazza Joudeh, Head of Waste Conditioning, LOESCHE GmbH | Published on ZKG Cement Lime Gypsum Magazine, Issue 7-8 2020.
As ever-higher efficiencies are demanded of grinding equipment, cement plants require a new benchmark for grinding component performance. Addressing wear through regular maintenance and repair is one strategy with the sustainable supply of grinding parts and management of mill wear as key factors in keeping mills running.
By Dr Dorival G Tecco, Loesche GmbH, Germany.
Reprint from INTERNATIONAL CEMENT REVIEW, December 2017
Get Fit For The Future - Dry Ore Comminution TechnologyLOESCHE
Our dry comminution is flexible, sustainable and energy-efficient.
The LOESCHE layout characterizes through a compact design and hence a small plan footprint - ideal from brownfield, but also for greenfield projects.
The BinEX discharge system has major components that include an inner cone, silo floor, discharge arm, and drive system. The inner cone and silo floor work together to form a natural angle of repose that prevents uncontrolled bulk material flow out of the central outlet. The discharge arm rotates to convey bulk material to the outlet at a rate determined by its speed. The silo floor design avoids buildups of material at corners. The BinEX comes in various sizes to accommodate different capacities and dimensions for discharging bulk materials like cement, coal, and minerals from silos. Loesche is an engineering company that designs, manufactures, and installs bulk material handling systems including silo discharge equipment.
Dry Granulated BF Sand: A Groundbreaking and Sustainable InnovationLOESCHE
"Dry granulated BF sand: A groundbreaking and sustainable Innovation – Production process, product grinding and building materials investigations".
- Presentation by Thomas Fenzl, Primetal Technologies Austria, during the 14th Global Slag Conference, Exhibition & Awards.
26 - 27 March 2019, Aachen, Germany
Loesche-Separation Plant for Production of Ultrafine Granulated Blastfurnace ...LOESCHE
Presentation written by Horst Michael Ludwig; Bauhaus Universität Weimar, F. A. Finger-Institut für Baustoffkunde; Holger Wulfert, and Dr. Winfried Ruhkamp, Loesche.
Presented at the 14th Global Slag Conference, Exhibition & Awards.
26 - 27 March 2019, Aachen, Germany
The document discusses Loesche's expertise in waste conditioning and management. It describes stabilizing existing landfills by identifying factors contributing to instability and implementing countermeasures. It also discusses remediating existing landfills by recovering valuable materials, reducing landfill volume, and rehabilitating the area. Loesche offers complete treatment plants for municipal solid waste that produce fuels, compost, and recyclables using a modular system tailored to each project's needs.
Presentation by Michael Gramlin during the Symposium on Waste and Recycling Technology organized by AHK (Deutsch - Russische Auslandshandelskammer).
September 2018.
An Integrated Approach to Alternative Fuel use in Cement MakingLOESCHE
The world is facing a growing challenge with handling the ever-increasing tonnages of waste materials being produced, while at the same time environmental pressures are driving the push to reduce fossil fuel use in industrial processes. Cement production is no exception in this respect.
Published in www.zkg.de
This document summarizes a case study from Morocco on converting waste into a reliable fuel for co-processing. A waste assessment was conducted to analyze the composition and potential of municipal solid waste. A technical assessment of cement kilns was also performed to evaluate their suitability for co-processing waste. Based on the results, a pre-treating process was designed to produce alternative fuels of varying quality that could be used in the cement production process. With proper quality control and legal framework, the project demonstrated that combustible waste can be reliably used as fuel to reduce greenhouse gas emissions.
Optimal Alternative Fuel Burning Starts with Computer SimulationLOESCHE
Presentation by Matthias Mersmann, General Manager Business Development New Products at LOESCHE GmbH, during the LOESCHE Symposium in Hanoi, Vietnam, in August 22, 2018.
1. TECHNICAL SOLUTIONS
Dr. Regina Krammer Dipl.-Ing. Thomas Leppak
Deputy Head of TrainingCenter, Customer Service Head of Customer Support
Loesche GmbH Loesche GmbH
Düsseldorf/Deutschland Düsseldorf/Deutschland
www.loesche.com
Sergiy Kotlyarskyy
Nach dem Studium der Geologie und Paläontologie Technical Director
an der Karl-Franzens Universität Graz (Österreich) Ternopolsky Karyer
p
romovierte Regina Krammer in den Bereichen Ternopol/Ukraine
marine Geologie und Paläo-Ozeanographie am
Research Center Ocean Margins der Uni Bremen.
Nach der Promotion wechselte sie als Redakteurin
zu einem Fachverlag für Rohstoffe nach London.
Seit Mitte 2007 arbeitet sie als eLearning-Autorin
und stellvertretende Leiterin des Training Centers
bei der Loesche GmbH.
Effizient Mahlen • Efficient grinding
Dolomitvermahlung in der Ukraine
Zusammenfassung: Im Sommer 2009 wurde in der Ukraine eine Vertikalwälzmühle
vom Typ LM 15.2 für die Dolomitvermahlung erfolgreich in Betrieb genommen.
Errichtet wurde diese Kompaktmühle bei Ternopolsky Karyer in Ternopol/Ukraine,
im Auftrag von OJSC Nadrabudinvest, einer ukrainischen Firma, deren
Produktpalette von Zucker über Baustoffe bis hin zu Düngemittel reicht.
Dolomite grinding in the Ukraine
Summary: In summer 2009 a vertical roller mill, type LM 15.2, was successfully
commissioned for dolomite grinding in the Ukraine. This compact mill was set up at
Ternopolsky Karyer in Ternopol/Ukraine. It was ordered by OJSC Nadrabudinvest,
a Ukrainian company with a product range covering sugar, building materials and
fertilizers.
40 AT MINERAL PROCESSING 11-2010 (Volume 51)
2. TECHNICAL SOLUTIONS
Blick in die Vertikalwälzmühle von Loesche
View into the Loesche vertical roller mill
1 Die ukrainische Mineralindustrie 1 The Ukrainian mineral industry
Die Ukraine gehört weltweit zu den rohstoffreichsten Län The Ukraine is one of the countries in the world richest in
dern. Nach Expertenmeinung besitzt das Land ungefähr 5 % natural resources. In the opinion of experts, this country has
der weltweiten Mineralvorkommen. Über 7700 Vorkommen about 5 % of the mineral deposits of the world. So far more
von annähernd 90 verschiedenen Mineralen wurden bisher than 7700 deposits of roughly 90 different minerals have
auf ukrainischem Boden prospektiert. Von diesen Vorkom- been prospected in the Ukraine. Today about half of these
men wird heutzutage ca. die Hälfte wirtschaftlich genutzt. deposits are used economically. Above all, iron alloys, ilmen
Vor allem Eisenlegierungen, Ilmenit, Eisenerz, Manganerze ite, iron ore, manganese ores and steel are produced in large
und Stahl werden in großen Mengen produziert. Auch quantities. Industrial minerals also play an important role in
Industrieminerale spielen in der Ukraine eine wichtige the Ukraine, in particular dolomite, graphite, kaolin, lime,
Rolle; allen voran Dolomit, Graphit, Kaolin, Kalk, Kalisalze, potash, quartz, salts, soda and various building materials. In
Quarz, Salze, Soda und verschiedene Baustoffe. Das Land addition, there are large reserves of coal in the country. Only
verfügt des Weiteren über große Kohlereserven. Lediglich Öl oil and natural gas are found in limited quantities and have
und Erdgas kommen nur in limitiertem Maße vor und müs to be imported (approx. 80 % of the oil and 77 % of the
sen importiert werden (ca. 80 % des Öls und 77 % des natural gas). The Ukraine is one of the leading countries
Erdgases). Die Ukraine ist zudem eines der weltweit führen globally as regards energy transit and has extensive networks
den Energietransitländer und besitzt ausgedehnte Netzwerke of oil and gas pipelines, in which the two raw materials from
für Öl- und Gaspipelines, die die beiden Rohstoffe aus Russia and the region around the Caspian Sea are trans
(Volume 51) AT MINERAL PROCESSING 11-2010 41
3. TECHNICAL SOLUTIONS
1 Region Ternopol in der Ukraine 2 Aufgabegut Kalk und Dolomit
Ternopol region in the Ukraine Lime and dolomite as feed materials
Russland und dem Gebiet um das Kaspische Meer quer ported across the country. About one third of the Ukrainian
durch das Land transportieren. Ungefähr ein Drittel der mineral transports goes to Europe, one quarter of the exports
ukrainischen Mineraltransporte geht nach Europa, ein Vier- goes to Russia and other former CIS states.
tel des Exports nach Russland und in andere ehemalige
GUS-Staaten. Both, due to the diversity und frequency of the minerals as
well as the favourable geopolitical position in Europe, the
Sowohl durch die Diversität und Häufigkeit der Minerale als Ukraine will hold a growing share of the extractive industry
auch durch die begünstigte geopolitische Position in Europa, in Europe also in the future.
wird die Ukraine auch in Zukunft einen wachsenden Anteil
an der extraktiven Industrie in Europa inne haben.
2 Dolomite grinding in Ternopol
More than 200 mineral deposits have so far been explored in
2 Dolomitvermahlung in Ternopol the West Ukrainian region around Ternopol (Fig. 1). These
Über 200 Mineralvorkommen wurden bisher in der westuk are mainly raw materials for the building materials industry,
rainischen Region um Ternopol (Bild 1) geologisch explo first and foremost dolomite and lime (Fig. 2). Four limestone
riert und erforscht. Hauptsächlich handelt es sich um quarries (Fig. 3) and two sand pits are operated in this region
Rohstoffe für die Baustoffindustrie, allen voran Dolomit und managed by OJSC Nadrabudinvest. The products manufac
Kalk (Bild 2). Unter der Leitung von OJSC Nadrabudinvest tured there are used as additives in the sugar industry, in the
werden in dieser Region vier Kalksteinbrüche (Bild 3) und building trade, in road construction as well as in the metal
zwei Sandgruben betrieben. Die dort hergestellten Produkte lurgical and siliceous industries.
werden in der Zuckerindustrie, der
Baubranche, im Straßenbau und der
metallurgischen bzw. silikatischen In-
dustrie als Zusatzstoffe verwendet.
Da im Jahr 2012 die Ukraine zusam
men mit Polen Gastgeber der Fußball-
Europameisterschaft sein wird, steigt
der Bedarf an Baustoffen zurzeit
enorm an. Vor allem im Straßenbau
bzw. in der Sanierung des vorhande
nen Straßennetzes werden große
Mengen an Baustoffen, insbesondere
Asphalt, benötigt. Aus diesem Grund
hat OJSC Nadrabudinvest im Jahr
2008 entschieden, eine Anlage zur
Vermahlung von Dolomit in der
Maksymivka Region zu errichten.
Dieser dort aufbereitete Dolomit wird
unter anderem als Bindemittel in der
Asphaltherstellung genutzt. Der Auf
trag zur Errichtung einer Kompakt
mahlanlage (Bild 4) ging an die
Loesche GmbH in Düsseldorf/ 3 Der Steinbruch vor Ort • The local quarry
42 AT MINERAL PROCESSING 11-2010 (Volume 51)
4. TECHNICAL SOLUTIONS
4 Layout der Mahlanlage in Ternopol • Layout of the grinding plant in Ternopol
Deutschland. Um den Bedürfnissen und Kapazitätsvorgaben Since together with Poland the Ukraine will be hosting the
von OJSC Nadrabudinvest gerecht zu werden, wurde eine European football championships in 2012, the demand for
Loesche Mühle vom Typ LM 15.2 (Bild 5) ausgewählt. building materials is increasing enormously at present. Large
quantities of building materials, in particular asphalt, are
needed, above all, in road construction and for the rehabilita
3 Funktionsweise einer Loesche Mühle tion of the existing road network. For this reason, in 2008,
Eine Vertikalwälzmühle weist folgende Design-Kriterien auf: the OJSC Nadrabudinvest decided to set up a grinding plant
eine flache Mahlschüssel, individuell gelagerte Schwinghebel, for dolomite in the Maksymivka region. The dolomite pre
ein hydropneumatisches Federungssystem und entweder pared there is used, amongst other things, as a binder for the
zwei, drei, vier oder sechs Mahlwalzen. Eine LM 15.2 besitzt production of asphalt. The order for the installation of a
eine Mahlschüssel mit einem Durchmesser von 1,5 m und compact grinding plant (Fig. 4) was given to the Düsseldorf-
2 Mahlwalzen (Aufmacherbild). based Loesche GmbH/Germany. A Loesche mill, type
LM 15.2 (Fig. 5), was selected to meet the requirements and
Die Funktionsweise einer Vertikalwälzmühle lässt sich fol capacity specifications of OJSC Nadrabudinvest.
gendermaßen beschreiben (Bild 6): Das Mahlgut wird auf der
Mahlschüssel durch Überrollen von den Walzen zerkleinert.
Der Materialstrom besteht aus Frischgut (Aufgabegut) und 3 Mode of operation of a Loesche mill
Rückgut, das vom Sichter als Überkorn abgewiesen und A vertical roller mill has the following design features: a flat
wieder dem Mahlprozess zugeführt wird. Durch Fliehkraft grinding table, individually supported rocker arms, a hydro-
gelangt der Materialstrom unter die Walzen, die das Mahlgut pneumatic spring system and two, three, four or six grinding
unter hohem Druck mahlen. Dieser hohe Druck entsteht rollers. An LM 15.2 has a grinding table with a diameter of
durch das Walzengewicht und eine hydraulisch erzeugte 1.5 m and 2 grinding rollers (Lead figure).
Zusatzkraft. Die Walzen selbst werden durch Reibung mit
dem Mahlgutbett in Rotation versetzt. Sensoren am The mode of operation of a vertical roller mill can be
Schwinghebel-System verhindern in Verbindung mit An- described as follows (Fig. 6): The material to be ground is
(Volume 51) AT MINERAL PROCESSING 11-2010 43
5. TECHNICAL SOLUTIONS
schlagpuffern eine metallische comminuted on the grinding
Berührung zwischen Walzen table by means of a rolling
und Schüssel. Das gemahlene over movement of the grind
Gut wird durch Zentrifugal- ing rollers. The material flow
kraft über den Schüsselrand consists of fresh material (feed)
nach außen geschleudert, wo and rejected material, the lat
es vom Heißgasstrom erfasst ter being rejected by the clas
wird. Das Staub-Gas-Gemisch sifier as oversize and re-fed to
strömt durch den Mahlraum the grinding process. The
hoch zum Sichter, der auf das material flow is passed below
Mühlenoberteil aufgesetzt ist. the rollers due the centrifugal
Größere Partikel (Überkorn) force. The rollers grind the
werden im Sichter nach außen material with high pressure.
geschleudert und sinken unter This high pressure is generated
der Einwirkung der Schwer by the roller weight and a
kraft nach unten, wo sie wie hydraulically generated addi
der dem Mahlprozess zuge tional force. The rollers them
führt werden. Fertiggut pas selves are set in rotation due to
siert mit dem Mahlstrom den the friction with the grinding
Leistenrotor und verlässt den bed. Sensors on the rocker arm
Sichter in Richtung Filter, wo system, together with stop
das Endprodukt abgeschieden buffers, prevent a metallic con
wird. tact between the rollers and
the table. Due to the centrifu
Die Montage der LM 15.2 bei gal force, the ground material
OJSC Nadrabudinvest begann is thrown over the table edge
im Frühling 2009 und im to the outside, where it is cap
August 2009 ging die Mühle tured by the hot gas flow. The
erfolgreich in Betrieb. Die dust-gas-mix flows through
erzielten Betriebsdaten sind in the grinding chamber upwards
Tabelle 1 aufgelistet. Das Mahl to the classifier, which is
gut wird auf eine Feinheit von arranged on the upper part of
20 % R 71 µm gemahlen. Mo- the mill. Larger particles (over
mentan werden Dolomit und 5 Die LM 15.2 im Einsatz • The LM 15.2 in operation size) are centrifuged outwards
fossilreicher Kalkstein aus drei in the classifier and drop down
verschiedenen Steinbrüchen vermahlen: Maksymivka, Skala- due to the gravity and are re-fed to the grinding process.
Podilska und Zavadiv. The finished product passes the caged rotor with the grind
ing flow and leaves the classifier in the direction of the filter
where the finished product is separated.
4 Loesches Konzept der Kompaktmühle
Die Mühle vom Typ LM 15.2 gehört zusammen mit der The installation of the LM 15.2 at OJSC Nadrabudinvest
LM 12.2 (Mahlschüsseldurchmesser 1,2 m) zu den von started in spring 2009 and in August 2009 the mill was suc
Loesche entwickelten kleinen Kompaktmahlanlagen. Diese cessfully commissioned. The operating data are shown in
Mühlen haben eine Kapazität von 5-25 t/h (je nach Auf table 1. The material is ground to a fineness of 20 %
gabematerial). Bei dem Design der Kompaktmühlen greift R 71 µm. At present, dolomite and limestone rich in fossils
Loesche auf umfangreiche Erfahrungen in der Entwicklung from three different quarries (Maksymivka, Skala-Podilska
von großen Loesche Mühlen für die Zementindustrie zu- and Zavadiv) are ground.
Tabelle 1: Betriebsdaten der LM 15.2 in Ternopol
Table 1: Operating data of the LM 15.2 in Ternopol
4 Loesche’s concept of the compact mill
The mills, type LM 15.2 and LM 12.2 (grinding table dia-
Erreichte Daten/Data obtained meter 1.2 m), belong to the small compact grinding plants
Aufgabematerial/ Dolomit, fossilreicher Kalkstein/ developed by Loesche. These mills have a capacity of
Feed material Dolomite, limestone rich in fossils 5-25 t/h (depending on the feed). The design of the compact
Mühlenkapazität/ 10 –13 t/h (je nach Material/ mills is based on the comprehensive experience gained in the
Mill capacity depending on the material) development of large Loesche mills for the cement industry.
Produktfeinheit/
20 % R 71 µm (Rückstand in For example, an LM 63.3+3 (grinding table diameter 6.3 m)
einem 71 µm Sieb/ residue retained reaches a capacity of up to 370 t of clinker per hour.
Product fineness
on a sieve of 71 µm)
Aufgabefeuchte/ Compact mills are able to grind different rocks, e.g. lime,
6 – 8 % H2O
Feed moisture burnt lime, dolomite, talc, bentonite and others. The mills are
44 AT MINERAL PROCESSING 11-2010 (Volume 51)
6. TECHNICAL SOLUTIONS
6 Flowsheet der Mahlanlage Ternopol • Flow sheet of the Ternopol grinding plant
rück. Eine LM 63.3+3 beispielsweise distinguished by a simplified design
(Mahlschüsseldurchmesser 6,3 m) erreicht and extreme robustness. Due to their
eine Kapazität von bis 370 t Klinker pro compact design they can be assem
Stunde. bled already at the place of manufac
ture, which saves assembly time at
Kompaktmühlen können verschiedene the plant site. This short assembly
Gesteine vermahlen, so zum Beispiel time and the standardized compo
Kalk, gebrannter Kalk, Dolomit, Talk, nents are reflected in the cost-effec
Bentonit, Baryt und einige mehr. Die tive price of the compact mills. As is
Mühlen zeichnen sich durch ein verein the case with all Loesche mills, the
fachtes Design und große Robustheit aus. compact grinding plant can easily be
Durch ihre kompakte Bauweise können adapted to changed raw materials
sie schon am Fertigungssort zusammen and desired product finenesses. Ease
gebaut werden, was die Montagezeit vor of maintenance, flexibility as regards
Ort an der Anlage verkürzt. Diese kurze the feed and low operating expenses
Aufbauzeit und standardisierte Bauteile are the further criteria distinguishing
spiegeln sich in dem kostengünstigen these mills.
Preis der Kompaktmühlen wider. Wie bei
allen Loesche Mühlen lässt sich die The successful commissioning of the
Kompaktmahlanlage leicht auf verän- LM 15.2 in Ternopol once again
derte Rohmaterialien und gewünschte showed that, not only in the proven
Produktfeinheiten anpassen. Wartungs field of cement and slag grinding but
freundlichkeit, Flexibilität im Bezug auf also increasingly in the field of indus
Aufgabegut und niedrige Betriebskosten trial minerals, vertical roller mills are
sind weitere Kriterien, die diese Mühlen distinguished by high energy effi
auszeichnen. ciency and great flexibility as regards
the rock to be ground.
Die erfolgreiche Inbetriebnahme der
LM 15.2 in Ternopol hat einmal mehr
bewiesen: Nicht nur im bewährten
Einsatzfeld der Zement- und Schlacke
vermahlung, sondern zunehmend auch
im Bereich der Industrieminerale zeigen
Vertikalwälzmühlen eine hohe Energie
effizienz und große Flexibilität im Bezug
auf zu vermahlende Gesteine.
(Volume 51) AT MINERAL PROCESSING 11-2010 45