Quality and safety requirements


1 Product range description lignite briquette refinement Schwarze Pumpe


1.1 General

1.1.1 Manufacture

REKORD lignite briquettes are manufactured in the refining plant of Vattenfall Europe Mining AG in Schwarze Pumpe. The crude lignite is crushed and dried and then moulded into briquettes in extrusion presses without the use of binders or other additives.

1.1.2 Brand names and labelling

Lignite briquettes from the Lusatian mining district are sold under the proprietary brand name "REKORD" briquettes. The "L" for Lusatia above the "REKORD" is the hallmark of the refining plant in Schwarze Pumpe. The V 52 format is only labelled with an "L".

1.2 Product quality

1.2.1 General

REKORD briquettes from Schwarze Pumpe comply with the requirements of the Federal Emissions Control Act (1. BImSchV [1st emission control ordinance]). The quality of the briquettes is continuously tested and monitored by an accredited laboratory. The following overview contains the key data from analyses of lignite briquettes (long-standing average values).

General quality parameters of lignite briquettes on dispatch:
Calorific value > 19 MJ / kg
Ash content < 5.5 %
Sulphur content < 0.35 %
(emissions-efficient)

Briquettes made from lignite are a natural product. As a result, water may subsequently evaporate from them. Should this occur, the weight of the briquettes is reduced accordingly and cracks may form in places. Optimum storage can minimise this effect. Other properties of the briquettes depend on format and are described in the following sections.

1.2.2 Forms of presentation

1.2.2.1 Loose goods

1.2.2.1.1 Half-brick H 105

The H 105 half-brick is produced from a complete block of 3 briquettes (left / inside / right). After pressing the block is broken up, producing 3 briquettes with edges. The briquette is suitable for small combustion spaces and is characterised by good burn properties thanks to the size and the fracture surfaces. The briquettes are pressed with sharp edges and are of good appearance and workmanship. Briquette edges damaged by transport and handling processes are admissible. The maximum proportion of post-evaporation, broken briquette and abrasion loss is 5 %.

Special quality features:
Average min max .
Compressive strength 15 MPa 11 MPa 20 MPa
Brick size 44 mm (40 – 47) 34 mm 54 mm
Brick length 100 – 110 mm
Brick height 70 – 76 mm
Briquette defects 4%

1.2.2.1.2 Half-brick H 105 - Industrial supplies

The H 105 half-brick is produced from a complete block of 3 briquettes (left / inside / right). After pressing the block is broken up, producing 3 briquettes with edges. The briquette is suitable for small combustion spaces and is characterised by good burn properties thanks to the size and the fracture surfaces. The briquettes are pressed with sharp edges and are of good appearance and workmanship. Briquette edges damaged by transport and handling processes are admissible. The maximum proportion of post-evaporation, broken briquette and abrasion loss is 5 %.

Special quality features:
Average min max .
Compressive strength 15 MPa 10 MPa 20 MPa
Brick size 44 mm (40 – 47) 35 mm 60 mm
Brick length 100 – 110 mm
Brick height 70 – 76 mm
Briquette defects 8 %

1.2.2.1.3 Whole brick G 156

The G 156 whole brick is manufactured as a single briquette with 2 briquettes per string. In contrast to the half-brick, no edges are produced by breaks. The briquette is suitable for medium and larger combustion spaces and is characterised by a long combustion period and burning time. The briquettes are pressed with sharp edges and are of good appearance and workmanship. Briquette edges damaged by transport and handling processes are admissible. The maximum proportion of post-evaporation, broken briquette and abrasion loss is 5 % in the case of direct supply. It must be anticipated that the proportion of broken briquette increases by 5 % for every additional handling.

Special quality features:
Average min max .
Compressive strength 15 MPa 11 MPa 20 MPa
Brick size 45 mm (42 – 50) 35 mm 55 mm
Brick length 156 mm 154 mm 158 mm
Brick height 63 mm 59 mm 67 mm
Briquette defects 4 %

1.2.2.1.4 Quarter-brick V 52

The V 52 quarter-brick is produced from a complete block of 6 briquettes. After pressing the block is broken up, producing 6 briquettes with edges. The briquette is highly suitable for small combustion spaces and is characterised by good burn properties thanks to the size and the fracture surfaces. Its very good rolling characteristics mean that it is mainly used in industrial furnaces. The briquettes are pressed with sharp edges and are of good appearance and workmanship. Briquette edges damaged by transport and handling processes are admissible. The maximum proportion of post-evaporation and abrasion loss is 5 %.

Special quality features:
Average min max .
Compressive strength 13 MPa 9 MPa 18 MPa
Brick size 40 mm (36 – 44) 30 mm 50 mm
Brick length 50 – 54 mm
Brick height 58 – 64 mm
Briquette defects 20 %

1.2.2.1.5 GB 182 loose (bulk)

The GB 182 whole brick is manufactured as a single briquette per string. The briquette is suitable for larger combustion spaces and is characterised by a long combustion period and burning time. Briquettes damaged by transport and handling processes are admissible. The maximum abrasion loss is 5 %.

Special quality features:
Average min. max. .
Compressive strength 15 MPa 10 MPa 20 MPa
Brick size 47 mm (42 – 54) 35 mm 60 mm
Brick length 182 mm 180 mm 184 mm
Brick height 58 mm 55 mm 62 mm
Proportions of
broken briquette 30 %
(also broken severalfold)
Briquette defects 5%

1.2.2.1.6 Briquette mix 2nd choice

This mixture consists of broken pieces of all formats, which are not sold as 1st choice for a variety of reasons. These goods are reduced in price so they are also of a lower quality. Only those product properties mentioned in section 1.2.1 General apply to this type of product presentation. The maximum abrasion loss is
• distribution by rail 15 %,
• distribution by road 25 %.

1.2.2.2 Packaged goods

Packaged goods consist basically of briquettes in the GB 182 format. These are packed in a variety of ways following manufacture. The GB 182 whole brick is manufactured as a single briquette per string. In contrast to the half-brick, no edges are produced by breaks. The briquette is suitable for larger combustion spaces and fireplaces and is characterised by a long combustion period and burning time. The briquettes are pressed with sharp edges and are of good appearance and workmanship.

Special quality features:
Average min max .
Compressive strength 15 MPa 11 MPa 20 MPa
Brick size 47 mm (45 - 49) 42 mm 54 mm
Brick length 180 – 184 mm
Brick height 58 mm 55 mm 62 mm

The packaged goods are supplied on standard Euro flat pallets measuring 800 x 1200 mm. When being transported, care must be taken to ensure that the selling weight per pallet of packaged goods refers to the minimum weight of the goods. The actual weight of the goods plus the unladen weight of the pallet gives the transport weight. This is higher than the stated selling weight in every case.

1.2.2.2.1 25 kg pack

Packaging type: Pack with straps 40 x 25 kg packs
per pack 44 briquettes
Height of pallet circa 106 cm including pallet
Width of pallet max. 900 mm (overhang)
Length of pallet 1200 mm (no overhang)
Transport weight circa 1100 kg
stackable max. 5-layer

1.2.2.2.2 10 kg film wrap pack

Packaging type: Film wrap with handle 90 x 10 kg packs
per film wrap pack 18 briquettes
Height of pallet circa 125 cm including pallet
Width of pallet 800 mm (no overhang)
Length of pallet 1200 mm (no overhang)
Transport weight circa 1000 kg
stackable max. 4-layer

1.2.2.2.3 10 kg paper carrier bag (paper bag)

Packaging type: Paper bag with handle 90 x 10 kg bags per bag 18 briquettes
Height of pallet circa 127 cm including pallet
Width of pallet 800 mm (no overhang)
Length of pallet 1200 mm (no overhang)
Transport weight circa 1000 kg
stackable max. 4-layer

1.2.2.2.4 25 kg paper sack

Packaging type:
per bag 74 briquettes
Height of pallet 1350 mm
Width of pallet 1000 mm
Length of pallet 1300 mm
Transport weight 790 kg
stackable

1.3 Definition of terms

1.3.1 Abraded particles (proportion of slack coal)

Abraded particles are chipped-off bits of briquette, some of the shiny lustre or other pieces of coal that are smaller in size than 20 mm and which accumulate during transport and logistics processes.

1.3.2 Briquette defects


1.3.2.1 Splitters

Splitters can be identified by cracks, predominantly parallel to the striking surface, but also at right angles to it. When placed under strain (logistics and transport processes), the briquette can break apart at these weak points. Briquettes with cracks produced by drying are not splitters.

1.3.2.2 Bonders

Bonders are briquettes that are stuck together, do not fall apart freely and can only be separated by damaging the striking surface.

1.3.2.3 Overthrusters

Overthrusters are produced if too much pressure is used during pressing. This causes the formation of overthrust areas, which cut the striking surface at an angle of 20° to 25°. They exhibit areas of irregular brightness.

1.3.3 Compressive strength

Parameters to determine the stability of the briquette in line with factory standard on the basis of the former TGL 9491.

1.4 Analysis reference values

Water content Wt. -% 19
Volatile components Wt. -% 41
Fixed carbon Wt. -% 34.5
Elementary analysis in delivery condition
Carbon Wt. -% 53
Hydrogen Wt. -% 3
Oxygen Wt. -% 19
Nitrogen Wt. -% 0,7
Sulphur total (limit value) Wt. -% < 1.0
Sulphur emission (limit value) Wt. -% < 0.35
Oxide analysis of ash as per DIN 51729
SiO2 Wt. -% 12
Fe2O3 Wt. -% 26
Al2O3 Wt. -% 4.5
So3 Wt. -% 22
CaO Wt. -% 29
MgO Wt. -% 5
Na2O + K2O + Rest Wt. -% 1.5
Ash fusibility (limit values) as per DIN 51730
Softening temperature °C > 1300
Hemisphere temperature (melting temperature) °C > 1350
Flow temperature °C > 1400
The analysis reference values are average values over a period of years and are on no account specified
conclusively.

For more information, see the attached document below this article:
Author: Dooffy Design | Viewed: 1249x


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