Our company buys: Ferrosilicon Manganese

Ferrosilicon Manganese is a fragile alloy of quartzite and deoxidized manganese ore which is used in the metallurgical engineering as a steel reducing agent. It makes alloy shock resistant and short when it is bent. The whole surface of the ferrosilicon manganese lumps must not have any foreign materials. Parting materials (sand, lime) traces, slag film, little slag is acceptable.

Foreign materials mass content is to be 0,5% of the party mass. Ferrosilicon manganese is supplied in the lump form weighting 20 kg max. Crushed ferrosilicon manganese is divided into several types according to the size rate. Particles quantity of the size less than 20×20 mm can be 15% max in the party of ferrosilicon manganese in lumps form. There can be 5% of lumps weighting more than 20 kg in one party. Ferrosilicon Manganese is transported without packaging or in the specialized containers.

Ferrosilicon Manganese. Technical demands and delivery terms.

1. Chemical Composition:


Grade Mass content, %
 (GOST) Si Mn C P S
min max
МнС25(А) More than 25 60 0,5 0,05 0,02
МнС25(Б) 0,25
МнС22(А) 20,0 — 25,0 65 1 0,1 0,02
МнС22(Б) 0,35
МнС17(А) 15,0 — 20,0 65 2,5 0,1 0,02
МнС17(Б) 0,6
МнС12(А) 10,0 — 15,0 65 3,5 0,1

0,02
МнС12(Б) 0,6

Note:

1. At customers request ferrosilicon manganese of type B is manufactured with phosphorus mass content 0,05 %, for the grades МнС12, МнС17, МнС22 -0,10 %max,  МнС25 - 0,05 %max.

2. In the ferrosilicon manganese grade there is decoded melt basis, phosphorus mass content and size type.


Grade(ISO) Mass content, %
Mn Si C P S
max
FeMnSi12 60,0 — 75,0 10,0 — 15,0 3,5 0,35 0,03
FeMnSi18 60,0 — 75,0 15,0 — 20,0 2,5 0,35 0,03
FeMnSi18LP 0,15
FeMnSi22HP 60,0 — 75,0 20,0 — 25,0 1,6 0,3 0,03
FeMnSi22MP 0,15
FeMnSi22LP 0,1
FeMnSi23HP 65,0 — 75,0 20,0 — 25,0 1 0,3 0,03
FeMnSi23MP 0,15
FeMnSi23LP 0,1
FeMnSi28 65,0 — 75,0 25,0 — 30,0 0,5 0,2 0,03
FeMnSi28LP 0,1
FeMnSi30HP 57,0 — 67,0 28,0 — 35,0 0,1 0,2 0,03
FeMnSi30MP 0,1
FeMnSi30LP 0,05

2. Size rate compound:



Ferrosilicon manganese is supplied in the lump form weighting 20 kg max or in the form of crushed and sieved particles. Size rate of each type must correspond to the norms stated in the table below.
Main demands
Size rate Lump size, mm Product mass content before sieving, mm  Product mass content  in the party, %
Before sieving  After sieving
1 20 — 200 315 10 10
2 20 — 100 200 10 10
3 5 — 100 200 10 10
4 5 — 50 100 10 15



Recommended demands 
Size rate Lump size, mm Maximal product mass content  in the party, %
Before sieving After sieving 
total less than 3,15 mm
1 100 — 315 10 15 7
2 25 — 200   15 7
3 10 — 100 Lump size mustn exceed maximum particles size more than 1,15 in two or three directions 15 7
4 3,15 — 50   7
5 3,15 — 25   7
6  3,15max   -

There can be 5% of lumps weighting more than 20 kg in one party.
The whole surface of the ferrosilicon manganese lumps must not have any foreign materials. Parting materials (sand, lime) traces, slag film, little slag is acceptable.