Fig. 1: Tilting rotary furnace with 2 ton capacity of Al
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Fig. 1: Tilting rotary furnace with 2 ton capacity of Al
In recent years, the volume of scrap and waste recycling of non-ferrous metals and alloys has grown significantly. For example, today in the aluminum industry, the recycling of scrap and waste of aluminum is a key process because it requires much less energy (only 5%) from the necessary to produce primary aluminum.
The various furnaces are using for recycling aluminium scrap. Energy efficient is summarized in table 1.
Table 1: Energy efficiency of different furnace types
| Furnace type | The energy consumption for melting 1000 kg of aluminium scrap |
| Theoretical energy consumption (efficiency-100%) | ~310 kW*h |
| Reverberator/ gas furnace | ~ 1280 kW*h |
| The shaft furnace | ~ 500-630 kW*h |
| Rotary furnace with stationary axis | ~ 1000 kW*h |
| Tilting rotary furnace | ~ 400-550 kW*h |
The main advantages of tilting rotary furnaces are following:
Today, the basic scheme for non-ferrous scrap recycling includes:
The tilting rotary furnace is the “heart” of this complex.
Fig. 2: The technological scheme of the tilting rotary furnace
The tilting rotary furnace capacity is varied in the range of 1 – 21 ton. As an example, the main technical parameters of tilting rotary furnaces with a capacity of 3 and 5 tons are shown in table 2.
Table 2. The main parameters of SA-Foundry tilting rotary furnaces with a capacity of 3 and 5 tons
| # | Parameters | The furnace type | |
| ARTF-3 | ARTF-5 | ||
| Charging | |||
| 1. | Capacity of aluminium, kg | 3.000 | 5.000 |
| 2. | Door opening diameter, mm | 1300 | 1400 |
| 3. | Liquid capacity, m3 | 1,6 | 2,5 |
| 4. | Maximum charge weight (including flux), kg | 3.410 | 6.150 |
| Productivity | |||
| 5. | Melting time of one charge, hours | ~ 2 | ~ 2 |
| 6. | Non melting time (charging, pouring melt and discharging slag), hours | ~ 1 | ~ 1 |
| 7. | Cycle time “tap to tap”, hours | ~ 3 | ~ 3 |
| 8. | Number of cycles per day (24 hrs) | 7 – 8 | 7 – 8 |
| 9. | Productivity per month, ton | ~ 500 | ~ 800 |
| Burner | |||
| 10. | Maximum burner power, kW | 1500 | 1750 |
| 11. | Minimum gas consumption, m3/h | 38,8 | 38,8 |
| 12. | Maximum gas consumption, m3/h | 156 | 182 |
| 13. | Burner fan, m3/h | 2300 | 2500 |
| Mechanical part | |||
| 14. | Drive power, kW | 25 kW / 380V | 30 kW / 380 V |
| 15. | Variable melting angle of furnace tilt, degrees | 0 — 15 | 0 — 15 |
| 16. | Rotation furnace speed, RPM | 0 — 6 | 0 — 6 |
Fig. 3: Tilting rotary furnace with 5 ton capacity of Al
Because the tilting rotary furnace works as a periodic melting furnace, the harmful impurities (for example, iron) in the charge are significantly reduced during melting, which is very important for secondary aluminum alloys production. The rotation of the furnace facilitates the mixing of the scrap, melt and flux, contributes to the formation of a uniform melt, heat transfer, as well as an effective reaction with flux. The scrap melts 2-3 times faster than in a static furnace with the same capacity, which ensures low energy consumption.
SA-Foundry is ready to offer effective technical solutions for the scrap and waste recycling of non-ferrous metals and alloys.
equipments for recycling
equipments for recycling
equipments for recycling
equipments for recycling
equipments for recycling
SA-Foundry sp. z o.o. is a team of specialists who have many-year experience in the implementation of advanced process solutions for the production of castings and half-finished products from non-ferrous metals and alloys (aluminium, copper, zinc, lead) with improved cast properties.
