OK Mill upgrade provides greater flexibility and control
Recognised as the most cost-effective cement and slag grinding solution on the market, the OK Vertical Roller Mill recently underwent a design update and is now better than ever. Two cement plants in Indonesia will be the first to benefit.
The leading roller mill for grinding cement, slag and blended cements, the OKTM Vertical Roller Mill has a unique roller profile and combines effectively the drying, grinding and separation processes into one compact unit keeping the operating costs at the lowest level possible. Compared to traditional ball mill operations, the OK vertical roller mill uses 30 to 50 percent less energy, making it the most cost-effective method for grinding cement and slag. Since entering the market in 1982, over 100 OK mills have been installed in cement plants around the world. To maintain its position as the most cost-effective cement grinder available, FLSmidth recently put the OK mill through a design review process.
Simplicity: the key to better performance
Using advanced modeling tools, FLSmidth engineers concentrated on enhancing the mill’s durability and performance. By simplifying some of the mill’s major components, such as the swing levers, rollers, mill stands and foundation parts, and with the focus on easier maintenance, keeping the mill in tiptop working order is easier than ever.
A new feature, eccentric roller positioning, makes it easy to alter the position of the roller on the grinding table, which improves production flexibility and ensures more control over the distribution of wear on the table. To reduce energy consumption further, the mill now comes supplied with the new generation ROKSH separator.
Meeting increased cement demand in Indonesia
Two customers to benefit from the redesign are PT Semen Gresik (Persero) Tbk (PTSG) and PT Indocement Tunggal Prakarsa Tbk (ITP) in Indonesia. The Southeast Asian archipelago has come through the global financial crisis relatively unscathed and in 2010 experienced an economic growth rate of six percent. With investments in buildings and infrastructure rising to seven percent during the same period, the demand for cement has rapidly increased.
To keep up with the growing demand, an OK 42-4 milling station sold in February will come online at PTSG’s Tuban site in eastern Java and a newly signed contract in August 2011 with ITP will see another OK 42-4 in operation at their Citeureup plant site just outside Jakarta. Both mills will be supplied with MAAGTM gears reflecting the principle of a one source supply.
FLSmidth engineers worked closely with the teams from ITP and PTSG to ensure that the new equipment meets each plant’s specific needs.
Contact:Luis Petersen