Keeping Cement plants running: The role of condition monitoring in reliable operations

By Christian Gottenströter

Cement plants are designed for continuous production. Unlike batch-based industries, they typically operate 24/7 and rely on only one or two major planned shutdowns each year. During these short windows, extensive maintenance work must be completed efficiently and accurately. Unplanned stoppages can introduce additional wear and increased operational risk.

This operating model makes condition monitoring in cement plants especially valuable. By providing continuous insight into the health of critical systems like bucket elevators, conveyors, and packaging and palletising equipment, condition monitoring supports informed maintenance planning rather than reactive intervention. Instead of responding to failures after they occur, plant operators can act earlier, when corrective actions are still manageable and cost-efficient.

THE COST OF UNPLANNED DOWNTIME IN CEMENT PRODUCTION

Unplanned downtime is one of the most significant cost drivers in cement production. A developing fault may start small, but if it goes undetected it can quickly lead to consequential damage – increasing repair scope, extending shutdown duration and putting delivery schedules at risk. In a continuous process like cement production, the true cost is rarely limited to the failed component itself. It includes lost production, restart and stabilisation time, additional wear from repeated stopping and starting, and the knock-on impact on downstream operations.

To mitigate this risk, cement producers often hold extensive spare-parts inventories, with high-value components that involve long lead times being stocked in advance to avoid prolonged outages. However, this approach ties up capital and introduces new challenges. Spare parts degrade over time, lubricants age, and unused components may no longer perform as expected. Without accurate insight, spare-parts strategies can become inefficient, increasing costs without necessarily improving availability.

CONDITION MONITORING AND PREVENTIVE MAINTENANCE

Condition monitoring is key to modern preventive maintenance strategies. Rather than attempting to predict exact failure dates, it focuses on understanding trends, probabilities and risk levels based on real operating data. This approach is particularly suited to cement production, where operating conditions vary, specialist knowledge is not easily accessible, and absolute benchmarks are rarely available.

Traditional manual inspections, such as visual checks or listening for abnormal noise, are inherently subjective and depend heavily on individual experience. They also provide only a snapshot of current conditions. Condition monitoring, by contrast, is a continuous process. It builds a long-term picture of asset behaviour, supporting more reliable maintenance decisions and reducing dependence on individual judgement. With traditional maintenance skills also in increasingly short supply, condition monitoring offers cement producers an advantage – if it is implemented correctly.

Condition monitoring dashboard for bucket elevator

DIAGNOSTICS ARE KEY TO EFFECTIVE CONDITION MONITORING

Using existing data from sensors and other sources such as PLCs is an important first step. If necessary, additional sensor equipment can be added retrospectively. But effective condition monitoring is not just about data collection. Without proper interpretation, data can be misleading. Early indicators may trigger unnecessary concern or, conversely, be ignored if their significance is not understood. Meaningful condition monitoring requires more than anomaly detection – it requires diagnostic expertise that understands how specific systems behave under real operating conditions.

Effective condition monitoring combines data analysis with machine diagnostics. Data analysis identifies deviations; diagnostics determine their root causes, assess potential consequences, and define appropriate response timelines. This distinction is critical for avoiding both premature interventions and late reactions.

By interpreting trends in context, diagnostics support risk-based decision-making. Maintenance activities can be prioritised and planned within existing shutdown windows, spare parts can be ordered just in time, and unnecessary interventions can be avoided. Through diagnostics, condition monitoring becomes a practical tool for improving plant availability and increasing maintenance efficiency.

IMPLEMENTING CONDITION MONITORING: IN-HOUSE OR OUTSOURCE?

Condition monitoring can be managed in different ways depending on a cement producer’s size, operating model, and internal capabilities. Building an in-house programme requires investment not only in sensor technology, but also in specialist diagnostic expertise, training and the ongoing effort needed to interpret trends reliably over time. For some cement producers, this capability is developed centrally across multiple sites; for others, external support can be a more practical approach.

Where external support is chosen, working with a single, trusted partner can simplify implementation and ensure consistent diagnostic quality. A partner with broad application knowledge can offer customer support for multiple systems, reduce supplier complexity, and supplement maintenance teams with additional expertise when required. For many cement plant operators, this approach provides access to advanced condition monitoring capabilities without the burden of maintaining specialist resources internally.

While monitoring and analysis are conducted in a central diagnostics centre, maintenance remains local and hands-on. Using condition monitoring insights, teams know which assets require attention, when intervention is advisable, and how to prepare effectively. Planned shutdowns become shorter, more predictable and less disruptive as a result.

IMPROVING SAFETY AND WORKFORCE EFFICIENCY

Condition monitoring also supports safer working environments. It reduces the need for frequent inspections in confined spaces, high-temperature areas, or zones with dust and explosion risks. While maintenance work cannot be eliminated, unnecessary exposure is greatly reduced.

From a workforce perspective, condition monitoring also helps maintenance teams use their time and expertise more efficiently. It ensures that people are deployed where they create the most value and supports the development of new skills related to data interpretation and maintenance planning. Rather than replacing personnel, condition monitoring strengthens their role in plant reliability.

TAKEAWAY

Unplanned downtime cannot be eliminated, but it can be reduced, managed and controlled. When combined with expert diagnostics, condition monitoring helps cement producers make maintenance decisions based on real operating conditions – enabling better planning, more efficient use of resources, and fewer disruptive shutdowns. By improving plant availability while controlling cost and risk, condition monitoring becomes more than a technical tool: it becomes a competitive advantage in an increasingly demanding cement market.