Our Products

Silicon metal is used, among other things, as an aluminium alloyant; it is also employed in the chemicals industry for the manufacture of siloxanes and silicones. Our silicon metal output is, to a large extent, already covered by long-term purchase agreements involving German companies as the primary customers, thus contributing to the security of raw material supplies to Germany.

Two byproducts are also part of the production process. These are silicon slag and MicroSilica. Both these product will be sold to customers around the world.

Silicon Metal

Si

min

Fe

max

Al

max

Ca

max

CO2
/t mg-Si


BakkiSilicon

PCC BakkiSilicon 97
97.0 %
1.80 %
3.1
PCC BakkiSilicon 553
98.5 %
0.50 %
0.50 %
0.30 %
3.1
PCC BakkiSilicon 551
98.5 %
0.50 %
0.50 %
0.10 %
3.1
PCC BakkiSilicon 441
99.0 %
0.40 %
0.40 %
0.10 %
3.1
PCC BakkiSilicon 4402
99.0 %
0.40 %
0.40 %
0.02 %
3.1
PCC BakkiSilicon 421
99.0 %
0.40 %
0.20 %
0.10 %
3.1
PCC BakkiSilicon 411
99.0 %
0.40 %
0.10 %
0.10 %
3.1
PCC BakkiSilicon 3303
99.0 %
0.30 %
0.30 %
0.03 %
3.1
PCC BakkiSilicon 2510
99.0 %
0.25 %
0.10 %
3.1
PCC BakkiSilicon 2502
99.0 %
0.25 %
0.25 %
0.02 %
3.1
PCC BakkiSilicon 2202
99.0 %
0.20 %
0.20 %
0.02 %
3.1

Size:

  • 0 – 3/5 mm, 0 – 8 mm, 5 – 30 mm, 8 – 100 mm, 30 – 100 mm
  • Silicon Metal Fines can be milled up to customer’s request

Packing: Big Bags with/ without pallets, bulk into container/ bulk vessel

Specific customer requirements and other sizing on request

Microsilica

Average Analysis (dry material)

SiO2 (diff.) 95.0 %
Si 0.1 %
CI- 0.03 %
SO3 0.3 %
Na2Oeqv 1.0 %
CaOfree <0.01 %
Moisture when packed (378K) 0.2 %
LOI
– Undensified (1023K)
– Densified (1223K)
2.5 %
2.0%
pH 6.0
Specific surface 25.0 m2/g
Activity Index 120.0 %
Particle size
(Primary particles > 45 μm)
4.0 %
Bulk density when packed
– Undensified
– Densified
320 kg/m3
600 kg/m3

Packing: Big Bags with/ without pallets

Silicon Powder

Silicon Powder 0-0.070 mm

Chemical composition:  Screen analysis:
Si         >98.0 % > μ71       Max. 10 %
Fe       ca. 0.6 %
Al        ca. 0.5 %
Ca       ca. 0.2 %
Ti        ca. 0.1 %

Silicon Powder 0-0.200 mm

Chemical composition:   Screen analysis:
Si        >97.5 % > 0.5 mm           0.2 %
Fe       ca. 0.7 % > 0.2 mm           0.5 %
Al        ca. 0.6 % > 0.1 mm           4.0 %
Ca       ca. 1.0 % > 0.08 mm        7.0 %
Ti        ca. 0.1 % > 0.05 mm      20.0 %
> 0.02 mm      50.0 %
< 0.02 mm      18.3 %

Silicon Powder D50 = 100 – 350 nm

Particle size distribution  Adjustable according to requirements
Shape flakes
Specific surface (BET) 10-100 m²/g (dependent on particle size distribution)
Specific discharge capacity (mAh/g on active material level, based on Si nanoparticles) 3100 mAh/g @ 1/20 C; 0.01-1.2 V
2400 mAh/g @ 0.5 C; 0.01-1.2 V
Initial coulombic efficiency >85%
Function Precursor, intermediate product, raw material, anode active material, anode material, capacity increasing, fast charging capability

Secondary Products

Carbon Electrode Break Original diameter 1272 mm, ash 2.50 % max.
Quartz Sand Screen undersize
Silicon Sculls Si-level 45%
Silicon Fines

Other Secondary Products on request