Loesche Grinding Plants for Coal Gasification
Presented by Carsten Schössow Loesche GmbH, Germany
[email protected] www.loesche.com
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 representatives and agents wordwide
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 representatives and agents wordwide
Manufacturing Program
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-, anthracite-, lignite and predried lignite coal.
Manufacturing Program
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 temperature of up to 1,000° 1,000°C C which can be operated using traditional heating media and low-calorific gases.
Loesche Mill in 1928
Picture1.jpg
Loesche Coal Mill with 3 Rollers
Development of the Loesche Coal Mill
Erection of Loesche Mill LM 43.4 D
Module-design-concept - Definition of ‘Module‘
2-Roller-Mill
3-Roller-Mill
Module: Roller (without Tyre) Rocker Arm Spring Unit (inside) Pedestal
8 different Modules are available and used in 2-, 3-, 4- and 2+2 or 3+3 Roller-arrangements All modules are field proven since years
Extended Pedestal
o u e- es gn-concept - 2+2 an 3+3 arrangement
Cement Raw Material
3M + 3S
Coal
Cement and Slag 2M + 2S
Module and Grinding Table with Dam Ring
Shear Forces
Module in starting position
Module in working position
Part Load Conditions of LOESCHE Mills with 4- Rollers :
~60 % of normal capacity
~80 % of normal capacity
Roller and Rocker Arm Assembly
Swinging-Out Device, complete
Roller, without tyre, swung out position
Cage Rotor Classifier LSKS
Loesche Coal Mill Properties
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 Central Coal Grinding Plants for PCI
Plant Location/Country Dillingen,Germany Gent, Belgium Kaohsiung, Taiwan Oxelösund, Sweden Taranto, Italy Kosice, Slowakia Kaohsiung, Taiwan Tubarao, Brazil Hamilton, Canada Gijon, Spain Vanderbylpark, South Africa Cubatao, Brazil Baoshan, China Fukuyama, Japan
Customer Number of mills Throughput Dillinger Ironwork 2 LM 21.2 D 35 Sidmar 2 LM 21.2 D 30 China Steel Corp. 2 LM 17.2 D 20 Svenskt Stal 1 LM 19.2 D 22 ILVA Spa (RIVA) 3 LM 28.3 D 80 VSZ 1 LM 28.3 D 80 China Steel Corp. 2 LM 20.2 D 27 CST 1 LM 35.3 D 94 Stelco Steel 1 LM 26.3 D 65 Aceralia 2 LM 23.2 D 43,2 Iscor 2 LM 27.2 D 55 Cosipa 2 LM 26.3 D 46,5 Baosteel 2 LM 23.2 D 45 NKK Corporation 2 LM 23.2 D 42
% > 0,09 20 10 20 15 20 20 20 20 13 15 20 15 15 20
Year 1985 1986 1986 1986 1990 1991 1992 1994 1994 1995 1995 1995 1996 1997
Loesche Central Coal Grinding Plants for PCI
Plant Location/Country Kaohsiung, Taiwan Tubarao, Brazil Bremen, Germany Tubarao, Brazil Fos, France Sepetiba, Brasil Taichung, Taiwan Lipetsk, Russia Zaporozhye, Ukraine Hamilton, Canada Gent, Belgium Lipetsk, Russia Dangjing, South Korea Dillingen, Germany Taranto, Italy St. James Parish, USA Nizhniy Tagil, Russia Nowkuznesk, Russia Taichung, Taiwan
Customer Number of mills China Steel Corp. 2 LM 20.2 D CST 1 LM 23.2 D SWB 1 LM 28.2 D CST 1 LM 35.3 D Sollac 1 LM 23.2 D CSA 2 LM 26.3 D China Steel Corp. 2 LM 23.2 D NLMK 2 LM 23.2 D OJSC Zaporozhsta 2 LM 28.2 D Dofasco 1 LM 28.2 D Sidmar 1 LM 23.2 D NLMK 2 LM 28.3 D Hyundai Steel 4 LM 28.2 D Dillinger Ironwork 1 LM 21.2 D ILVA Spa (RIVA) 1 LM 28.3 D NUCOR Corp. 1 LM 28.3 D PW for Evraz 2 LM 35.3 D PW for Evraz 2 LM 35.3 D China Steel Corp. 1 LM 23.2 D
Throughput 30 40 70 94 50 60 35 46 52,5 42,7 56 80 61 50 80 90 90 90 35
% > 0,09 20 20 30 20 30 20 13 20 20 20 30 20 20 30 20 30 20 20 13
Year 2001 2002 2003 2004 2005 2006 2006 2007 2007 2007 2007 2007 2007 2008 2008 2008 2008 2008 2008
Specification of Coals normally used in Gasification Plants
Flow Sheet Central Grinding Plant
Based on: 11% Water to be evaporated 100°C (212 °F) exit tempe rature
100
95
Dew Point in Relation to Fuel and Oxygen Content
Natural Gas 90
85
C ° / t in o p w e D
80
75
70
65
60
Blast Furnace Gas 55
50 3
4
5
6
7
8
9
Oxygen Content / % (moist)
10
11
12
13
Flow Sheet Direct Firing Mill
What is IGCC ?
What is IGCC ?
Reference Plant NUON in Buggenum NL
Hot gas producer for low-calorific gases
Multiple Lance Burner for Low-Calorific Gases Cubatao, Brasil
re-erecte
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LOMA Hot Gas Producer Manufacturing
LOMA Hot Gas Producer Manufacturing
LOMA Hot Gas Producer Manufacturing
LOMA Heater with Multiple Lance Burner for Syngas and Natural Gas System Loesche-Brinkmann
Loesche Coal Mill LM 28.2 D Fukuyama II, Japan
Loesche Coal Mill LM 35.3 D in Tubarao, Brazil
Loesche Coal Mill Type LM 28.2 D in Bremen, Germany
Loesche Coal Mill LM 28.3 D in Taranto, Italy
Loesche Mills LM 23.2 D for Wood Pellets Avedore, Denmark
Coal Grinding Plant with Loesche Roller Mills LM 26.3 D in, Buggenum, NL
Loesche Roller Grinding Mill LM 63.4
Erection of Raw Mill LM 69.6
