1. Purchasing Categories: Tin Concentrates, Crude Tin Ores.
2. Trial Order Quantity: One Container .
3. Quality Standard Indication for Tin Ores .
(Please inform the content of the following elements)
Category | Grade | Tin (wB)/%≥ | Impurities (wB)/%≤ |
S | P | Bi | Zn | Sb | Fe |
First Category | Grade 1
Grade 2
Grade 3
Grade 4
Grade 5
Grade 6
Grade 7
Grade 8 | 65
60
55
50
45
40
35
30 | 0.4
0.5
0.6
0.8
1.0
1.2
1.5
1.5 | 0.3
0.4
0.5
0.6
0.7
0.8
1.0
1.0 | 0.10
0.10
0.15
0.15
0.20
0.20
0.30
0.30 | 0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.0 | 0.2
0.3
0.4
0.4
0.5
0.6
0.7
0.8 | 5
7
9
12
15
16
17
18 |
Second Category | Grade 1
Grade 2
Grade 3
Grade 4
Grade 5
Grade 6
Grade 7
Grade 8 | 65
60
55
50
45
40
35
30 | 1.0
1.5
2.0
2.5
3.0
3.5
4.0
5.0 | 0.4
0.5
1.0
1.5
2.0
2.5
3.5
4.0 | 0.4
0.5
0.6
0.8
1.0
1.2
1.4
1.5 | 0.8
0.9
1.0
1.2
1.4
1.6
1.8
2.0 | 0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.2 | -
7
9
12
15
16
17
18 |
Notice:
1. The first category is tin concentrates products, which can be put into furnace directly.
The second category is tin concentrates products, which need further processing treatment before smelting.
2. The analysis content of lead and tungsten in tin concentrates should be informed.
Please mark the shape and specification. |
This standard is applied to tin concentrates getting from mineral processing, and used for tin smelting.
(1) According to chemical constituents, tin concentrates can be divided into two categories. There are eight grades in each category. They should be calculated by Metric Ton on dry basis.
(2) The moisture content in concentrates can not be more than 12%, and the moisture content in concentrates, which are used for electric furnace smelting, can not be more than5%. As for special conditions, it can be negotiated by both parties.
(3) Other impurities should not be mixed into concentrates.
(4) The concentrates mostly have been delivered by bulk transport and small quantity can be packed. The same grade can be classified as one lot.
4.Inspection Method:
The inspection carried out by SGS at the port of discharge should be the final for both parties.
