Hydraulic roller presses boost productivity at Orient Cement

1st Jan 2019

0 minutes


Hydraulic roller presses boost productivity at Orient Cement

Milling and grinding
Orient Cement shares how the installation of two hydraulic roller press systems supported the efficiency and sustainability objectives of their Karnataka plant.

The limestone-rich belt of Karnataka in India is home to many cement plants, and the market for roller presses in the region is highly competitive. Given the numerous different options on the market, choosing the correct roller press solution and the equipment supplier can be daunting for plant owners. For Orient Cement, selecting the FLSmidth Hydraulic Roller Press (HRP) has proven to be a cost-effective solution.

Finding the right solution

With a desire to optimise productivity, Orient Cement established selection criteria for evaluating a new roller press system for use in its 6,600 tonnes-per-day integrated greenfield plant. The three most critical objectives were high production performance, low power consumption, and grinding without adding water.

Hydraulic roller press systems are the best choice for the raw materials in our region as the materials are quite dry in nature and have high grindability. We also require a waterless operation, so the HRP system was the obvious solution for us.

SHYAM ASAWA Head of Projects at Orient Cement

Performance at Orient Cement

UnitGuaranteedAchieved during Performance Test
Guaranteed capacity TPH250266
Product fineness (wet sleeve residue on 90µ)%1212
Product moisture (indicative only)%1.00.8
Specific power consumption, includes roller press drive, seperator drive, seperator fan, booster fan, and auxillariesKwh/tonne @metre16.814.6

TABLE 1: The grinding system’s performance after the installation of two hydraulic roller presses.

Low power, no water

Shortly after the installation, it was evident that Orient Cement’s project objectives would be achieved, with all performance guarantees successfully delivered. As shown in table 1, actual production exceeded the intended capacity target by 6.5 percent – at a lower power consumption and with zero water consumption.

High-performance HRP

FLSmidth's latest hydraulic roller press sets the bar with its efficient design and includes other noticeable improvements in performance:

  • Solid forged rollers (no hollow shaft)
  • Spherical roller bearings to accommodate angular misalignments
  • Oil for bearing lubrication, bearing cooling, and filtering of foreign media
  • Optimum roller Diameter to Width ratio
  • Hinged frame for easy roller removal

These features enable the HRP to achieve high energy efficiency and contribute to a low total cost of ownership, largely due to its ease of operation and minimal maintenance costs.

When to consider an HRP system

  • In regions with a high price per kW/hour
  • In applications with an average feed moisture of less than 6%
  • If water is scarce
  • Where waste heat recovery power generation is important

Today, the grinding system at the Karnataka plant is performing well. After the initial 10,000 hours, the conventional wear surface remains in good condition. No repair work has been required or performed thus far. This strong result is a testament to both the quality and durability of the equipment.

The HRP is suitable for upgrades and new installations. In some cases, an upgrade can more than double the capacity while reducing energy consumption by 30%

We chose FLSmidth to supply the HRP system for raw grinding based on its brand credibility and industry experience. FLSmidth has yet again proven itself and has clearly set a new standard with its superior performance and commendable results

MR. ASAWA Head of Projects at Orient Cement

The FLSmidth Hydraulic Roller Press installed at the Karnataka plant

Orient Cement's Hydraulic Roller Press - Raw Grinding Circuit

Orient cement's hydraulic roller press specifications

  • Raw material grindability: 12kWh/t at VRM shaft for product residue of 12% on 90 µm sieve
  • Overall feed moisture: 4%
  • Unit type: Roller Press HRP 3.0
  • HRP dimension: 1920mm (diametre) x 1563mm (width)
  • Installed power: (1600kW*2)
  • HRP speed: 2m/s maximum
  • Grinding pressure limit: 5500kN/m2 (maximum)
  • Static seperator size: RPGS - 3150
  • Dynamic seperator size: RARL 40

Since the successful installation of the HRP, Orient Cement has opened its plant doors to other cement producers to showcase the successful grinding solution and welcomed any discussion regarding its positive experiences.