VERTICAL ROLLER MILL
MAIN FEATURES
• SIMA vertical roller mills use 30-50% less energy than ball mill systems. It’s good for profits, good for the environment.
• Space-saving design reduces civil construc- tion costs.
• Simple layout and operation with fewer machines in the circuit ensure high run-factor.
• Excellent drying makes
the mill well suited for grinding blast furnace slag or blended cements from one or more wet components.
• Low vibration made possible by specially designed roller and table profiles ensures operating reliability.
• Curved table increases retention time and grinding bed thickness for smooth operation.
• Easy to adjust Blaine and particle size dis- tribution for required cement quality.
• During slag grinding, wear is minimized via a special by-pass that removes iron particles from the grinding table.
• All exposed surfaces
are wear-protected.
VERTICAL ROLLER MILL
the SIMA VERTICAL ROLLER MILL series is the premier roller mill for finish grinding of Portland cement, slag and blended cements. With a 30-45% reduction in the energy requirements forcement grinding and 40-50% for slag as compared with traditional ball mill operations,
SIMA RM 10-20 mill under erection
The SIMA mill can contribute significantly to your profitability and competitiveness.
The design combines the drying, grinding and separation processes into just one unit, thus simplifying the plant layout. A low noise level makes outdoor installation feasible,
Substantially reducing civil construction costs and improving the working environment.
Because of its highly effective drying performance, the SIMA mill is a natural choice for grinding blended cements with one or more wet components.
Design advantages
Depending on its size, the SIMA mill has three or four rollers. They are hydro-pneumatically pressed against the material bed on the rotating grinding table.
A patented grooved roller profile creates a high and concentrated grinding pressure on the outer path, allowing air to escape in the middle. The inner path serves to even out and consolidate the material before it continues to the next roller.
The segmented roller wear parts can be made of even the hardest material without risk of cracking and are very well suited for hard facing. Moreover, the segments are reversible, so their full width can be utilized. These features ensure maximum longevity.
Operating advantages
The rollers are in a lifted position when the mill is started, ensuring trouble-free startup. This eliminates the need for an auxiliary drive. A control system supervises the machinery and facilitates operation.
Typical wear rates (g/t cement) of wear parts |
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Portland cement |
Slag |
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Roller |
Table |
Roller |
Table |
Without hardfacing |
1 |
1 |
5 |
6 |
With hardfacing |
0.5 |
0.5 |
2.5 |
3.0 |
*50/50 clinker and slag mixture |
View of rollers inside an SIMA mill SIMA 33-4 for slag
Our brochure makes no offers, representations or warranties (express or implied), and information and data contained in this brochure are for general reference only and may change any time. Please contact us for specific information or data that may relate to your interests.
Typical specific energy consumption (kWh/t) motor input |
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Portland cement |
Slag* |
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Blaine (cm2/g) |
3,300 |
4,000 |
4,000 |
5,000 |
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SIMA mill |
Ball mill |
SIMA mill |
Ball mill |
SIMA mill |
Ball mill |
SIMA mill |
Ball mill |
Mill |
17.6 |
34.2 |
21.3 |
44.9 |
25.7 |
51.8 |
32.2 |
71.1 |
Fan etc. |
6.9 |
3.2 |
8.3 |
4.9 |
9.4 |
7.6 |
13.0 |
12.3 |
Total |
24.5 |
37.4 |
29.6 |
49.8 |
35.1 |
59.4 |
45.2 |
83.4 |
*Slag with 8% moisture |
The capacity range depends on fineness, grindability and additives (types and portion of mill feed) |
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SIMA Mill |
size |
20-10 |
24-12 |
27-13 |
28-14 |
30-15 |
32-16 |
34-17 |
Mill motor, installed |
kW |
200 |
355 |
460 |
640 |
800 |
960 |
120 |
Airflow, approx., mill outlet |
Nm3/s |
26 |
36 |
47 |
60 |
75 |
91 |
110 |
Cement, capacity range |
t/h |
10-15 |
20-25 |
30-35 |
40-45 |
50-55 |
60-65 |
70-75 |
Slag, capacity range |
t/h |
3- 8 |
5-10 |
10-15 |
20-25 |
30-35 |
40-45 |
50-55 |
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Typical wear rates (g/t cement) of wear parts |
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Portland cement |
Slag |
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Roller |
Table |
Roller |
Table |
Without hardfacing |
1 |
1 |
5 |
6 |
With hardfacing |
0.5 |
0.5 |
2.5 |
3.0 |
*50/50 clinker and slag mixture |
View of rollers inside an SIMA mill SIMA RM 10-20 for slag
The capacity range depends on fineness, grindability and additives (types and portion of mill feed) |
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SIMA Mill |
size |
10-20 |
12-24 |
13-27 |
14-28 |
15-30 |
16-32 |
17-34 |
Mill motor, installed |
kW |
355 |
460 |
640 |
800 |
960 |
1200 |
1400 |
Airflow, approx., mill outlet |
Nm3/s |
26 |
36 |
47 |
60 |
75 |
91 |
110 |
Cement, capacity range |
t/h |
10-15 |
20-25 |
30-35 |
40-45 |
50-55 |
60-65 |
70-75 |
Slag, capacity range |
t/h |
3- 8 |
5-10 |
10-15 |
20-25 |
30-35 |
40-45 |
50-55 |
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