27 Sep,2019 UTC+8 Views:
1. One set of system is enough, low operating costs
When the specific surface area of the products reaches 4500cm²/g, the average grinding capacity of the CHAENG’s steel slag vertical mill can reach 90t/h. But choosing ball mill, there are at least six sets of ball mill systems being required.
2. The power consumption of vertical mill system is 20% lower than ball mill
For many cement enterprises, the high energy consumption of ball mill system is such a big headache. But the new type of vertical mill is a kind of energy-saving and environment-friendly grinding equipment. Compared with ball mill system, vertical mill can save 30%-50% power. Also compared with traditional vertical mill, CHAENG’s steel slag vertical mill has large external circulation ratio, which can reduce the system power consumption by about 20%.
| System Solutions | ball mill | roller press + ball mill | vertical roller mill |
|---|---|---|---|
| System Power Consumption, kWh/t | 90 | 60 | 45 |
| Adaptability | bad (drying separately) | general (drying with V-Separator) | very good (drying inside the mill) |
| Total Power（KW） | bad | good | very good |
| Main reason of affecting operation rate | need to pour out the steel balls and clear the iron slag | need to repair the worn roller surface | need to repair the worn press roller and liner |
| Scale | difficult | easy | easy |
| Application and practice | 100,000 tons | 300,000 tons | / |
3. Low dust pollution
The ball mill requires several auxiliary equipment and conveyors due to the complicated system process, which will cause serious dust pollution. The steel slag vertical mill system is fully enclosed integrating functions of conveying, grinding, drying and powder separating and CHAENG also installs dust collectors in the vibrating screen frame and the feeding frame, which really achieves the “low” emission of dust.
4. High iron separation rate, improving economic efficiency
Steel slag generally has an iron content ranging from 1% to 3%. CHAENG optimizes the iron separation process of the vertical mill grinding system, and adds several iron removers to the feeding system, which greatly increases the iron removal amount and improves the integrated economic and environmental benefits.
5. Advanced slag discharge belt, to reduce the wear of grinding roller
The slag discharge belt adopts the advanced flat belt and paving device, which enables the iron remover suspended on the belt to more effectively magnetically select the iron-containing material discharged from the mill to prevent it from being re-grinding, so as to reduce the wear of the grinding roller.
6. Finished fineness can be guaranteed at 480-500m2/kg
CHAENG steel slag vertical mill uses many external circulation and effectively removes iron in the external circulation, which can make the iron content in the tailings less than 2%. And the steel slag powder has high fineness that the finished specific surface area can reach 450~500 m2/kg or above, and has good activity, which is suitable as cement active mixture and concrete admixture.
