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Roller press:Efficient grinding solutions

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KHD has been world?? one of the leading cement machinery suppliers. It has been offering solutions to cement plants to enhance capacities in the exiting set up by adding roller press and suitable modifications further in the line. ICR brings one such real life case of Unique Cement in Bangladesh.

Currently the cement industry worldwide is confronted with distinct but mutually exclusive goals. KHD is now providing the solutions to the industry, which are not only directed towards the best optimised energy efficient plants, but also having special considerations for environment requirements and implementation at each step. Focusing on main technology today, it is globally known that roller presses are the best solution for grinding circuits with lowest electrical energy in cement production process. Comflex grinding system from KHD consumes less energy compared to other similar process circuits and is a proven fact for raw material, slag grinding and composite cement grinding.

The ambition to save energy during the production leads to the deeper investigation to grinding cement in finish mode with roller presses also.

Tests were conducted in several plants with different cement compositions and the cement properties were evaluated. The same cement composition was also produced with roller press-ball mill circuits. The results show similar cement properties for both grinding procedures, which proves the capability of the roller press to grind cement in finish mode and to save energy with having good cement properties.

With the introduction of COMFLEX? a process optimised roller press circuit is available on the market which enables the most energy efficient grinding in finish mode for raw material, slag and cement. It is furthermore very good suited as an upgrade possibility for existing grinding units.

Project module and technology selection

For over 80 years, the additive materials as granulated blast furnace slag (GBFS), fly ash and limestone has been used as a replacement of clinker in the cement manufacturing process. Most popular cements in South Asian countries are PCC (Portland Composite Cement), PLC (Portland Limestone Cement) PPC (Portland Pozzolanic Cement) and PSC (Portland Slag Cement).

Unique Cement is a division of Meghna Group of Industries, a leading group in Bangladesh in PCC cement production. Since the beginning, the group has been continuously investing in the latest technology and continuously upgrading the existing manufacturing facilities to keep pace with the changing competitive environment, which makes them stand out of the crowd of the cement manufacturers in Bangladesh.

As the capacity enhancement requirement, the group entrusted Humboldt Wedag India (HWI) as the leading partner for design, engineering, supply, installation and commissioning of the ball mill upgrade with roller press and a completely new roller press and ball mill circuit.

System design

The existing ball mill was 3.8m diameter x 12.14 m length and was upgraded by RP16-170/180 to give a guaranteed production of 235 tph PCC at 5 per cent R on 45 micron from an initial production of 75 tph. The system consists a high pressure grinding roller press with tungsten carbide stud rolls, V-separator and dynamic SKS separator in COMFLEX? orientation, similarly a ball mill with its dedicated dynamic separator is connected with this system in such a manner that at any time any circuit can be operated individually as per market requirement. Ball mill is with two chamber and it can be operated with flexibility either with connected with roller press or standalone mode.


Fig 1 gives the conceptual flowsheet for the offered system

The offered system COMFLEX? consists of a static V-separator which is connected with a dynamic SKS separator of the latest stage of development. The material transport is aligned to the material properties and energy wise optimised split into pneumatically and mechanical convey. The optimised arrangement allows lowest energy consumption paired with known product properties.

The offered roller press is characterised by the stud surfaces which are the characteristics of KHD roller presses and offer low wear and nil maintenance. On any grinding surface, lowest wear rates are achieved, if the ground material itself provides the wear protection. This is reached by profiling the surface in a way that it is partly covered with ground material. KHD?? patented STUD-lining, consists of extremely wear resistant carbide cylinders inserted in the roller surface. More than 70 per cent of the roller surface is covered with ground material, acting as autogenous wear protection. Wear rate of rollers/table in VRM is higher than roller press and this can be well attributed to the stud surfaces as offered by KHD.

Also the roller press is capable to operate with stand-alone mode as well as with ball mill. Operating roller press in finish [standalone] mode requires some measures to be taken, prior to select this for composite cement grinding these are well take during conceptualisation as under:

  • Feed width of rollers to be accurately parallel to roller axis to avoid material segregation

  • Removal of iron metal imbedded inside the slag by using magnetic separators and metal concentrator

  • Improved separator sealing to get fine product fineness (below 5 per cent residue on 45 mic)

  • Optimisation of V-separator to get pre-separation of material before entering to dynamic separator and proper mixing of fresh feed, dynamic separator coarse return material and V-separator coarse rejects before entering into roller press as feed.

  • Feed box area reduced in pre-mix box to allow the coarse and fine material mixing before entering in to the roller press pre-bin

Some of arrangement of V-separator, roller press pre-bin and roller surface (stud-surface) are shown in figures below.


Figure 2: Pre-Mixing Box inside the RP bin.

Figure 3: Pre-mix box real photograph

Figure 4: Roller press with STUD lining.

Figure 5: Distribution within V-separator.

The figures shows the material feed axis of Roller press and pre-mixing of fines with coarse are important in stabilisation in roller press operation (Fig 2 & Fig 3).

Operation results

The system has been commissioned and is clear with the performance guarantee test. Table 1 gives the consolidated results of the performance guarantee test.


Table 1: Performance Guarantee Results

Though the system guarantees have been carried out as roller press in semi finish mode with ball mill interesting are the results achieved in roller press standalone mode are given in Table-2.


Table 2: Operation results

BM_RM

Evaluation

After technical evaluation following are the merits of the circuit are envisage;

Stability in operation: Feeding material like fly ash, GGBS are fine in nature and they show a fineness below 3 mm hence where other grinding systems like vertical roller mills required water spray to form a grinding bed but in roller press when a pre-mixing of fines with coarse material is made properly it can efficiently grind up to higher fineness [below 5 per cent on 45 mic/3,900-4,000 Blaine] without using water spray in grinding bed reflects a big savings in heat and water requirement.

Lifetime of grinding parts: Usage of highly wear resist material in grinding parts is essential when abrasive material like slag and fly ash is used as mixture. The stud type wear resistant surface over grinding rolls features highly wear resistant Wolfram-carbide studs inserted into the roller surface, which allows the formation of a protective autogenous wear layer. Material like clinker, slag etc. is pressed between the studs, covering and protecting more than 70 per cent of the surface. With STUD lining continuous operation of 20,000 hours and total roller lifetime of more than 40,000 hours is possible.

Product quality: Roller press circuit alone generates more fines due to compression grinding forces in comparison to any other grinding system and due to optimum separator specific loading the particle size distribution found balanced in terms of steepness where as in ball mill the fly ash particles get activated and grounded material gets a round shape this develops higher strength. Non usage of water spray avoids partial hydration of cement during comminution, which makes this circuit different than other grinding systems where the water is spraying about 1 per cent to 2 per cent of total feed required to form grinding bed.

Freedom to select the mode of operation: As circuit is conceptualised to have a freedom to operate in standalone ball mill, roller press or combined RP+BM circuit hence if demand is less than economic mode RP alone can be selected, if roller press circuit is under maintenance the ball mill will be in operation and in case of high market demand, both together can be in operation, as grinding balls are selected in a way that circuit switch over can be made within two to three hours from ball mill alone to RP+BM circuit.

Economical operation: RP alone mode operates with 2kWh/t unit lesser in specific power consumption and heat requirement is about half than the other grinding system (except ball mill).

Conclusion

The circuit at Unique Cement represents the benchmark of modern KHD roller press grinding technology by with its focus on efficiency, innovation and easiness in operation. The COMFLEX? system is not only benefits in different products but also gives flexibility comfort to the end user during the operation

Roller press circuit in finish mode operation for Pozzolanic and composite cement is an emerging system which has a high potential for energy saving and ease of operation hence further possibilities to explore this circuit in grinding of mix aggregate or composite cement lead to a systematic approach towards eco-friendly efficient circuit.

Thus it can be concluded that best operating practices, efficient and reliable equipment and plant availability are the parameters, which define the efficiency of a cement plant which in turn directly affects the energy conservation aspect. Successful, cost-effective solutions in energy efficiency and green technologies and practices often include additional benefits such as increasing the overall productivity. KHD is contributing by integrating the best technology and point approach to supply an efficient plant in long run.

ABOUT THE AUTHORS:

AK Dembla, Deepti Varshney and Prakash Patil are from KHD Humboldt Wedag India.

AK Singh is from Unique Cement, Bangladesh.

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Concrete

ABB Extends Drive Lifespan at ACC Cement Plant Without Production Shutdown

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ABB reconditions 25 drives at ACC’s Jamul cement plant, avoiding 16 tonnes of CO₂ emissions while improving reliability through predictive maintenance.
Chhattisgarh

ABB has signed a multi-year Motion OneCare service agreement with ACC Limited, part of the Adani Group, to modernise ageing industrial drives at its Jamul cement plant in Chhattisgarh, improving operational reliability while avoiding approximately 16 tonnes of carbon dioxide (CO₂) emissions without disrupting production.

Announced on 27 October 2026, the agreement combines scheduled drive reconditioning, digital condition monitoring and energy appraisals to extend equipment lifespan, improve plant uptime and optimise maintenance costs. The initiative marks a shift from conventional equipment replacement towards a more resource-efficient approach to industrial asset management.

The first phase, completed in April 2026, involved the on-site reconditioning of 25 ABB ACS800 variable speed drives without a major plant shutdown. By retaining the existing cabinets and restoring the drive modules rather than replacing entire panels, ABB helped ACC preserve capital investment, minimise material consumption and avoid approximately 16 tonnes of CO₂ emissions.

A second phase, covering an additional 25 ACS800 drive modules, is scheduled for the fourth quarter of 2026. The programme is designed to improve long-term equipment reliability while allowing maintenance activities to be aligned with the plant’s operational schedules.

The ACS800 drives, installed at Jamul in 2010, had delivered more than a decade of near-continuous service in demanding cement manufacturing conditions. However, ageing electrical components and changing fault patterns had begun to affect their ability to meet the plant’s reliability requirements.

Rather than opting for complete equipment replacement, ACC engaged ABB’s certified engineers to conduct a comprehensive asset health assessment. The evaluation found that the existing cabinets and enclosures remained structurally sound, making targeted reconditioning a technically viable and cost-effective alternative to full replacement.

Drawing on nearly two decades of experience with ACC’s equipment and operating requirements, ABB developed a maintenance framework tailored to the plant’s shutdown windows, budget cycles and production priorities.

The Motion OneCare agreement incorporates planned equipment restoration, condition-based monitoring and energy assessments, enabling ACC to adopt a more systematic approach to maintaining critical electrical infrastructure.

As part of the programme, ACC has implemented ABB Ability™ Digital Powertrain Insights to monitor drive performance and identify emerging operational issues before they result in equipment failures.

The digital platform provides continuous visibility into parameters such as temperature, current, vibration and fault patterns. These insights allow maintenance teams to detect early signs of equipment deterioration, schedule interventions more effectively and reduce the likelihood of unexpected downtime.

Amit Gupta, Local Division Manager, Motion Services, ABB India, said: “We know what unchecked wear costs over time: a small inefficiency that eats away at ROI for years. At Jamul, the evidence pointed clearly to assets with productive life still in them.”

“Our job was to restore them properly and give the team the tools to stay ahead of the next problem. At ABB, we don’t just fix what fails. We want to protect what works.”

The initiative also demonstrates the growing relevance of circular economy principles in cement manufacturing, where extending the service life of existing industrial equipment can reduce capital expenditure, material consumption and the environmental impact associated with manufacturing replacement components.

According to ABB, drive reconditioning can reduce lifecycle emissions by 50 to 80 per cent compared with complete equipment replacement. By preserving functional components and restoring critical modules, the process helps retain the economic and material value of existing industrial assets.

The addition of energy appraisals in subsequent phases will further expand the programme beyond equipment restoration, enabling ACC to assess drive performance, identify energy-saving opportunities and improve operating efficiency.

For cement manufacturers, variable speed drives play an important role in controlling motors and optimising energy consumption across production processes. Maintaining their reliability and efficiency is essential for minimising operational disruptions and managing electricity costs.

Vinod Bahety, CEO – Cement Business, Adani Group, said: “Moving from reactive firefighting to a structured maintenance plan was exactly what this operation needed. That kind of peace of mind doesn’t come easily. It comes from a partner that understands how your business runs.”

“We didn’t need a full system overhaul; we needed expert support, actionable insights, and a plan we could execute around our schedule. That’s what we got.”

The project supports ACC’s broader strategy to improve manufacturing efficiency through digital transformation, preventive maintenance and sustainable asset management.

ACC, a subsidiary of Ambuja Cements and part of the Adani Group, operates 20 cement manufacturing facilities and 119 ready-mix concrete plants across India. The company has been advancing initiatives focused on renewable energy, circular economy practices and technology-driven operational improvements.

Alongside Ambuja Cements, ACC is part of a large-scale building materials business committed to achieving net-zero emissions by 2050, with near-term and net-zero targets validated by the Science Based Targets initiative (SBTi).

The Jamul initiative aligns with these sustainability objectives by demonstrating how equipment life extension and digital monitoring can contribute to resource efficiency without requiring large-scale replacement of existing infrastructure.

ABB, a global technology company specialising in electrification and automation, brings more than 140 years of industrial expertise and employs approximately 110,000 people worldwide. Its Motion Services business supports industrial customers through equipment maintenance, modernisation, digital monitoring and lifecycle management solutions.

The agreement also reflects a wider shift in industrial maintenance practices, with manufacturers increasingly adopting predictive technologies to improve equipment availability, manage costs and reduce unplanned shutdowns.

With 25 drives already reconditioned and another 25 scheduled for restoration, ABB’s collaboration with ACC illustrates how targeted modernisation, digital monitoring and circular maintenance practices can extend the operational life of critical equipment while supporting more efficient and sustainable cement production.

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Concrete

ABB Drives Digital Transformation at TCI MAX Cement Plant in J&K

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ABB deploys advanced process control at TCI MAX’s Srinagar cement plant to improve clinker quality, energy efficiency and sustainable manufacturing.

Kashmir 

ABB has deployed its advanced process control technology at TCI MAX Cement’s Srinagar facility in Jammu and Kashmir, marking the region’s first reported implementation of advanced process control (APC) in cement manufacturing and strengthening efforts towards more efficient, digitally enabled production.

Announced on 5 November 2026, the deployment of ABB Ability™ Expert Optimizer at the facility, operated by Trumboo Industries Pvt. Ltd., aims to improve process stability, clinker quality, energy efficiency and overall plant productivity. The implementation forms part of TCI MAX’s strategy to modernise its manufacturing operations through automation and digital technologies.

Following the integration of ABB’s advanced process control solution and supporting IT infrastructure, TCI MAX has reported improvements in operational productivity, product quality and sustainability-related performance indicators. The technology focuses on optimising the cement pyro process, a critical stage of production involving high-temperature processing and clinker formation.

Waseem Ahmed Trumboo, Director, Trumboo Industries Pvt. Ltd., said: “Introducing advanced process control at TCI MAX is an important step in how we are evolving our operations. Our focus is on improving the stability and efficiency of our processes while maintaining consistent clinker quality. We have been encouraged by the performance of the solution during commissioning and by the support from the ABB team, and we look forward to realizing its full potential.”

ABB Ability™ Expert Optimizer combines advanced process control, model predictive control (MPC) and artificial intelligence (AI) to continuously monitor and optimise manufacturing operations. By analysing process conditions, predicting operational behaviour and automatically adjusting key parameters, the system enables more consistent production while reducing process variability.

In cement manufacturing, maintaining stable pyro-processing conditions is essential for achieving uniform clinker quality and optimising thermal energy consumption. Fluctuations in operating parameters can affect fuel efficiency, production output and product consistency.

The deployment is designed to address these challenges through real-time process optimisation, helping operators maintain more stable kiln operations while improving the utilisation of fuel, electricity and raw materials.

Kapil Agarwal, Senior Vice President and Local Division Manager, Process Industries Division, ABB India, said: “Cement producers are increasingly looking to adopt digital technologies to achieve greater consistency and efficiency while addressing their sustainability priorities. ABB Ability™ Expert Optimizer brings advanced process control and deep cement process expertise together to help operators make their processes more stable and efficient. We are pleased to support TCI MAX as it takes this important step in its digital transformation.”

The technology also supports sustainability objectives by optimising fuel consumption, improving electrical energy efficiency and minimising process waste. More stable operations can contribute to lower energy intensity and reduced emissions associated with cement production.

For TCI MAX, the investment represents a move towards data-driven manufacturing, where automated control systems complement operator expertise to improve production performance and operational reliability.

The implementation is particularly significant for Jammu and Kashmir’s cement industry, as it introduces advanced process optimisation technology to a regional manufacturing facility. Its deployment could demonstrate the potential for wider adoption of digital automation across cement plants seeking to modernise their operations.

The project builds on ABB’s experience in delivering advanced process control solutions to cement manufacturers worldwide. Through the integration of industrial automation, predictive technologies and process engineering expertise, the company supports manufacturers in improving resource efficiency and maintaining consistent production quality.

As cement producers face increasing pressure to manage energy costs, improve productivity and reduce their environmental footprint, technologies such as AI-enabled process control and predictive optimisation are becoming important components of plant modernisation strategies.

ABB’s Expert Optimizer provides a platform for addressing these priorities by enabling automated adjustments based on changing process conditions, reducing reliance on manual intervention and supporting more efficient plant operation.

ABB, a global technology company specialising in electrification and automation, has more than 140 years of industrial experience and approximately 110,000 employees worldwide. Its Automation business employs around 26,000 people and provides technologies and services across process, hybrid and maritime industries.

The TCI MAX deployment reinforces ABB’s growing role in the digital transformation of cement manufacturing in India, where improving process efficiency and reducing energy consumption remain critical to the industry’s long-term sustainability.

With the advanced process control system now implemented at its Srinagar facility, TCI MAX aims to build on the initial operational improvements and further optimise production efficiency, clinker consistency and environmental performance.

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Ramco Cements’ Hard Worker Wins Eight Awards at ‘Love of Advertising Awards 2026’

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Ramco Cements’ Hard Worker brand wins eight awards for excellence in advertising, packaging and brand identity at the Love of Advertising Awards 2026.

Hyderabad 

The Ramco Cements Limited’s construction chemicals brand, Hard Worker, has secured eight awards at the Love of Advertising Awards 2026, recognising its creative excellence across television, digital advertising, packaging design and brand identity.

Organised by the Advertising Club of Trivandrum, the awards were presented at a ceremony held at The Leela Raviz, Kovalam, on 24 October 2026. The recognition highlights Hard Worker’s integrated marketing strategy and its efforts to establish a distinctive presence in India’s competitive construction chemicals market.

The eight awards span multiple creative categories, reflecting the brand’s approach to combining product-focused communication with engaging storytelling, humour and innovative design. Through its campaigns, Hard Worker has sought to simplify technical product benefits and make construction chemicals more accessible and relatable to consumers and construction professionals.

Built around the philosophy of “Hard-working products for hardworking people”, the brand focuses on communicating practical product advantages through memorable advertising narratives while maintaining a consistent identity across different marketing platforms.

Its campaigns for Ramco Hard Worker Eco Plaster and Tile Fix have been central to this approach. The Eco Plaster campaign highlights water conservation through the product’s self-curing properties, positioning it as a solution that supports more efficient construction practices. Meanwhile, Tile Fix promotes specialised tile-fixing solutions by presenting their practical benefits through relatable situations and creative storytelling.

Beyond advertising, Hard Worker has invested in distinctive packaging and brand identity development to improve product recognition and maintain consistency across customer touchpoints. This integrated approach has helped the brand differentiate itself in a category where marketing communication has traditionally focused on technical specifications and functional performance.

A V Dharmakrishnan, CEO, Ramco Cements, said, “Winning eight awards at the Love of Advertising Awards is a proud moment for Ramco Cements and the Hard Worker team. We believe that building a strong brand requires not only quality products but also the ability to communicate their value in a compelling and differentiated manner. Hard Worker’s journey reflects our commitment to combining product performance with innovative marketing to create meaningful connections with our customers and strengthen our presence in the construction chemicals market.”

The recognition comes as building materials manufacturers increasingly focus on brand differentiation, product awareness and customer engagement to strengthen their position in the construction chemicals segment.

By using humour and storytelling to explain product applications and benefits, Hard Worker aims to bridge the communication gap between technical construction solutions and the practical requirements of contractors, applicators and end-users.

Balaji K. Moorthy, Executive Director – Marketing, Ramco Cements, said, “Hard Worker was conceived to bring a fresh perspective to the construction chemicals category, where product communication has traditionally been functional and technical. Our endeavour has been to break through the clutter with distinctive ideas, humour and storytelling, while keeping the product proposition at the heart of every campaign. The recognition across TV and digital advertising, packaging design and brand identity design demonstrates our integrated approach to building the brand. These eight awards are an encouraging recognition of the creative thinking and collaborative effort behind Hard Worker’s marketing initiatives.”

The awards add to Hard Worker’s growing portfolio of creative recognitions and reinforce Ramco Cements’ emphasis on integrating product innovation with strategic marketing.

The brand’s communication initiatives also reflect a wider shift in the construction materials industry, where manufacturers are increasingly adopting consumer-focused marketing strategies to improve product understanding and strengthen relationships with construction professionals.

With its portfolio of construction chemicals, Hard Worker aims to address evolving requirements for durability, application efficiency and construction quality. Its marketing efforts seek to complement these product attributes by building stronger awareness and encouraging the adoption of specialised construction solutions.

Ramco Cements, one of India’s established cement manufacturers, operates across cement and allied building solutions. Through Hard Worker, the company is expanding its presence in the construction chemicals segment with products designed to enhance performance, quality and durability in modern construction applications.

The latest recognition strengthens Hard Worker’s brand visibility and underscores the growing importance of creative communication in promoting technical building materials. Ramco Cements intends to continue combining product development with distinctive marketing initiatives to support the brand’s growth in India’s construction chemicals market.

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