The circular double-chamber vertical active lime kiln has a "Patent of invention" and two practical new Patents.
The model is different from the MEARZ type kiln in terms of profile, working principle, and characteristics. It thus has in-built advantages.
We, SSIT, support our partners to undertake design, manufacture, construct and provide technical services to this new patented technology in a spirit of transparency, clarity to yield mutual benefit.
Main techno-economic index:
1. Output: 400t, 500t, or 600t per day; depending on the client's requirement.
2. Energy consumption:
- ≤850kg standard coal per ton of lime (for dolomite, even lower),
- Rotary kiln consumes 1200 - 1400kg standard coal to produce one ton of lime.
3. Physical and chemical properties of active lime
- Residual CO2≤2.5%
- Activity ≥350ml (4N.HCL 5 minutes titration )
- Unburnt and dead-burnt lime ≤5%
4. Comparison between Active Lime and Common Lime used for Converter
---- Data extracted from a Chinese steel-making plant:
| Item |
Unit |
Common lime |
Active lime |
| Lime consumption |
Kg/t steel |
85.1 |
58.5 |
| Desulfurization effect |
% |
17.4 |
31.3 |
| Scrap ratio |
% |
7-8 |
10-12 |
| Steel & iron consumption |
Kg/t steel |
1120.8 |
1113.3 |
| Times of spraying |
Nos. |
21 |
12 |
The above table shows that the active lime is more suitable for steel-making
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