Loesche Grinding Plants for Coal GasificationLoesche Grinding Plants for Coal Gasification

Presented by Carsten SchössowLoesche GmbH, Germany schoessow@loesche.de

www.loesche.com

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Company Profile

Loesche GmbH

was founded in 1906 in Berlin, Germany

is a privately owned company certified according to DIN EN ISO 9001

has 290 employees in Düsseldorf, Germany - worldwide more than 500 employees

with associated companies in Spain, South Africa, USA, China, UK and India as well as representatives and agents wordwide

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Cement raw material grinding plants with 2, 3, 4 and 6 grinding roller mills for a capacity up to 1.000 t/h of cement raw meal and drive motors up to 6,500 kW

Grinding plants for cement clinker up to 350 t/h and blast furnace slag up to 250 t/h with fineness between 2,800 and 6,000 cm²/g.

Dry grinding plants for coal with a capacity up to 150 t/h, grinding a wide range of coals varying from steam coal, bituminous-, anthracite-, lignite and predriedlignite coal.

Manufacturing Program

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Dry-grinding plants for baryte, bentonite, quick lime, colemanite, dolomite, gypsum, graphite, feldspar, limestone, kaoline, magnesite, manganese ore, phosphate, titanium slag and titanium dioxide etc.

Hot gas producers with an outlet temperature of up to 1,000°C which can be operated using traditional heating media and low-calorific gases.

Manufacturing Program

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Picture1.jpg

Loesche Mill in 1928

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Loesche Coal Mill with 3 Rollers

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Development of the Loesche Coal Mill

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Erection of Loesche Mill LM 43.4 D

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2-Roller-Mill 3-Roller-Mill

8 different Modulesare available and used in 2-, 3-, 4- and 2+2 or 3+3 Roller-arrangements

All modules are field proven since years

Extended Pedestal

Module:

Roller (without Tyre)

Rocker Arm

Spring Unit (inside)

Pedestal

Module-design-concept - Definition of ‘Module‘

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Cement Raw Material

Coal

Cement and Slag

2M + 2S

3M + 3S

Module-design-concept - 2+2 and 3+3 arrangement

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Module and Grinding Table with Dam Ring

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Shear Forces

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Module in starting position

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Module in working position

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Part Load Conditions of LOESCHE Mills with 4- Rollers :

~60 % of normal

capacity

~80 % of normal

capacity

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Roller and Rocker Arm Assembly

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Swinging-Out Device, complete

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Roller, without tyre, swung out position

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Cage Rotor Classifier LSKS

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Typical Characteristics

1. Pressure shock resistant to up to 3.5 bar abs.

2. Stop buffers ensure no metal contact between roller and table

3. Individual guidance of Grinding Rollers

4. 2, 3 or 4 roller design (dependent on throughput)

5. Flat grinding table with conical rollers arranged under 15° => shear forces

6. Hydropneumatic spring system

Loesche Coal Mill Properties

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Loesche Central Coal Grinding Plants for PCI

Plant Location/Country Customer Number of mills Throughput % > 0,09 Year

Dillingen,Germany Dillinger Ironworks 2 LM 21.2 D 35 20 1985

Gent, Belgium Sidmar 2 LM 21.2 D 30 10 1986

Kaohsiung, Taiwan China Steel Corp. 2 LM 17.2 D 20 20 1986

Oxelösund, Sweden Svenskt Stal 1 LM 19.2 D 22 15 1986

Taranto, Italy ILVA Spa (RIVA) 3 LM 28.3 D 80 20 1990

Kosice, Slowakia VSZ 1 LM 28.3 D 80 20 1991

Kaohsiung, Taiwan China Steel Corp. 2 LM 20.2 D 27 20 1992

Tubarao, Brazil CST 1 LM 35.3 D 94 20 1994

Hamilton, Canada Stelco Steel 1 LM 26.3 D 65 13 1994

Gijon, Spain Aceralia 2 LM 23.2 D 43,2 15 1995

Vanderbylpark, South Africa Iscor 2 LM 27.2 D 55 20 1995

Cubatao, Brazil Cosipa 2 LM 26.3 D 46,5 15 1995

Baoshan, China Baosteel 2 LM 23.2 D 45 15 1996

Fukuyama, Japan NKK Corporation 2 LM 23.2 D 42 20 1997

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Loesche Central Coal Grinding Plants for PCI

Plant Location/Country Customer Number of mills Throughput % > 0,09 Year

Kaohsiung, Taiwan China Steel Corp. 2 LM 20.2 D 30 20 2001

Tubarao, Brazil CST 1 LM 23.2 D 40 20 2002

Bremen, Germany SWB 1 LM 28.2 D 70 30 2003

Tubarao, Brazil CST 1 LM 35.3 D 94 20 2004

Fos, France Sollac 1 LM 23.2 D 50 30 2005

Sepetiba, Brasil CSA 2 LM 26.3 D 60 20 2006

Taichung, Taiwan China Steel Corp. 2 LM 23.2 D 35 13 2006

Lipetsk, Russia NLMK 2 LM 23.2 D 46 20 2007

Zaporozhye, Ukraine OJSC Zaporozhstal 2 LM 28.2 D 52,5 20 2007

Hamilton, Canada Dofasco 1 LM 28.2 D 42,7 20 2007

Gent, Belgium Sidmar 1 LM 23.2 D 56 30 2007

Lipetsk, Russia NLMK 2 LM 28.3 D 80 20 2007

Dangjing, South Korea Hyundai Steel 4 LM 28.2 D 61 20 2007

Dillingen, Germany Dillinger Ironworks 1 LM 21.2 D 50 30 2008

Taranto, Italy ILVA Spa (RIVA) 1 LM 28.3 D 80 20 2008

St. James Parish, USA NUCOR Corp. 1 LM 28.3 D 90 30 2008

Nizhniy Tagil, Russia PW for Evraz 2 LM 35.3 D 90 20 2008

Nowkuznesk, Russia PW for Evraz 2 LM 35.3 D 90 20 2008

Taichung, Taiwan China Steel Corp. 1 LM 23.2 D 35 13 2008

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Specification of Coals normally used in Gasification Plants

Copyright 920574-00-4

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Flow Sheet Central Grinding Plant

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Dew Point in Relation to Fuel and Oxygen Content

50

55

60

65

70

75

80

85

90

95

100

3 4 5 6 7 8 9 10 11 12 13

Oxygen Content / % (moist)

Dew

po

int

/ °C

Natural Gas

Blast Furnace Gas

Based on: 11% Water to be evaporated

100°C (212 °F) exit temperature

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Flow Sheet Direct Firing Mill

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What is IGCC ?

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What is IGCC ?

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Reference Plant NUON in Buggenum NL

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Hot gas producer for low-calorific gases

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Multiple Lance Burner for Low-Calorific Gases Cubatao, Brasil

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Pre-erected Valve Rack

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LOMA Hot Gas Producer Manufacturing

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LOMA Hot Gas Producer Manufacturing

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LOMA Hot Gas Producer Manufacturing

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LOMA Heater with Multiple Lance Burner for Syngas and Natural Gas System Loesche-Brinkmann

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Loesche Coal Mill LM 28.2 D Fukuyama II, Japan

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Loesche Coal Mill LM 35.3 D in Tubarao, Brazil

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Loesche Coal Mill Type LM 28.2 D in Bremen, Germany

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Loesche Coal Mill LM 28.3 D in Taranto, Italy

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Loesche Mills LM 23.2 D for Wood Pellets

Avedore, Denmark

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Coal Grinding Plant with Loesche Roller Mills LM 26.3 D in, Buggenum, NL

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Loesche Roller Grinding Mill LM 63.4

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Erection of Raw Mill LM 69.6

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Thank you for Thank you for

your attentionyour attention