Concrete

Making gains with OKâ„¢ cement mill

Published

4 years ago

October 19, 2021

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Since 1982, the OK??vertical roller mill (VRM) has provided the cement industry an energy-efficient, flexible ??both in terms of size and the ability to handle variable feed materials ??and reliable solution for cement grinding. These benefits are ever more relevant today, as cement producers focus on reducing both operating costs and their environmental footprint through the increased use of supplementary cementitious materials added to the mill?? feedstock.

Nowhere are the benefits of the OK mill more appreciated than in the Indian subcontinent, where cement plant requirements vary widely in terms of grinding plant size and capacity to produce multiple cement types in each unit. In 2018 and 2019, a total of 15 VRMs were sold by FLSmidth in the region for raw, coal and cement applications.

The same trend applies to the neighboring countries, Nepal and Bangladesh; one such notable example is the OK 81-6 cement mill at Shah Cement in Bangladesh, which has been certified by Guinness World Records as the world?? largest VRM. The mill is 25.6m tall, weighs in at 1,904 tonnes and features the latest MAAG MAX Drive technology providing 11.6 MW of power. Successfully operating for two years since August 2018, the mill recently exceeded its performance guarantee testing.

??e are proud to have the world?? largest vertical roller mill as part of our operations,??said Hafiz Sikander, Director of Operations, Cement Division of Shah Cement Industries. ??e selected the FLSmidth OK 81-6 mill for its exceptional efficiency and reduced power consumption ??and it is living up to its promise. As the largest single-unit grinding mill in the industry, we expect it to meet our production requirements for many years.??/p>

Variable feed ??but invariably high product quality

Product quality is a function of cement particle size distribution (PSD) and the dehydration of the gypsum within the cement. In the OK mill, parameters such as mill air flow, separator speed and grinding pressure, can be easily adjusted during operation to control or alter the PSD curve to a (steeper or flatter) profile that achieves the desired quality standards. When needed, the PSD curve can match that of an existing ball mill.

The instant adjustability of operating parameters, as well as a short retention time, also means that switching between different types of products can be performed with almost immediate effect. The OK mill has also proven to be effective for grinding blended cements with one or more wet components, not only because of its highly-effective drying performance, but also due to its ability to maintain a stable grinding material bed. As a result, OK mills have been used to grind a wide range of materials from 100 per cent slag with feed containing more than 20 per cent moisture to limestone, pozzolan and fly ash.

Moreover, the OK Mill with ROKSH separator regularly grinds products with fineness above 5500 Blaine, further proving its versatility, as well as its capability for consistent, stable operation throughout a range of cement, blended cement, and slag cement products.

Figure 1: The composition of cement products produced using the OK??cement mill

Lower OPEX and maintenance with the FLSmidth OK??mill

Compared with other VRMs, the OK mill consistently operates with lower airflow and the lowest power consumption. As a result of the patented cement grinding profile and integral ROKSH separator with industry-leading high efficiency, the mill consistently uses 15 to 20 per cent (3 to 5 kWh/MT) less power than other cement VRMs.

The latest mill design adopts mechanical improvements based on actual operating and maintenance practices and the most recent metallurgical developments. A simple layout and fewer number of machines in the mill circuit ensure high run-factor, reduced civil construction costs and low long-term maintenance costs.

Modular design across applications and sizes allows for common spares, including roller assembly, lube systems, hydraulic systems and cylinders, and gear units. It also incorporates design elements in the roller and table profile that improve operating stability and reliability, regularly giving availability of 95 per cent of scheduled operating time. The OK mill can be operated with half of its rollers out of service and still achieve 60 to 70 per cent of the nominal output, minimising risk of lost production due to unplanned stoppages and guaranteeing long-term availability.

The ROKSH separator design has also been improved, allowing producers to achieve better product quality and ease of maintenance. Additionally, internal components have been adapted to improve airflow and mill velocity profile, reducing wear from jet abrasion. New features have also been added to provide easier maintenance access to the static guide vanes and rotor.

A mill to meet the needs of today?? cement producer

??s cement producers continually seek reduced energy consumption and lower maintenance costs, two emerging trends are changing the face of cement production: the increased use of grinding stations that support variable feed materials and more widespread use of vertical roller mills,??said John Terembula, FLSmidth Global Product Line Manager ??VRM. ??ement producers in India, Nepal and Bangladesh have achieved much success relying on the OK mill to meet these needs.??/p>

– Communication by the management of the company

Concrete

India, EU Resume Talks To Finalise Free Trade Agreement

High-level negotiators meet in Delhi to push balanced trade deal

Published

1 hour ago

November 4, 2025

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A senior delegation from the European Union (EU) is in New Delhi from 3 to 7 November 2025 to hold detailed discussions with Indian counterparts on the proposed India–EU Free Trade Agreement (FTA). The negotiations aim to resolve key pending issues and move closer to a comprehensive, balanced, and mutually beneficial trade framework.

The visit follows Union Minister of Commerce and Industry Piyush Goyal’s official trip to Brussels on 27–28 October 2025, during which he held forward-looking talks with European Commissioner for Trade and Economic Security Maroš Šef?ovi?. Both sides reaffirmed their commitment to intensify dialogue and strengthen cooperation towards finalising the FTA.

This week’s deliberations will focus on trade in goods and services, rules of origin, and technical and institutional matters, guided by the shared goal of creating a modern and future-ready trade pact that reflects the priorities and sensitivities of both India and the EU.

The discussions gained further momentum after a virtual meeting on 3 November 2025 between Minister Piyush Goyal, Commissioner Maroš Šef?ovi?, and EU Commissioner for Agriculture and Food Christophe Hansen, which helped align positions on key areas of mutual interest.

As part of the ongoing negotiations, Ms. Sabine Weyand, Director-General for Trade at the European Commission (EU DG Trade), will visit New Delhi on 5–6 November for high-level consultations with India’s Commerce Secretary Rajesh Aggarwal. The talks will address technical and policy matters critical to concluding the agreement.

The EU delegation’s visit underscores the shared determination of India and the European Union to conclude a fair, transparent, and equitable FTA, aimed at boosting trade, investment, innovation, and sustainable economic growth.

Both sides view the FTA as a strategic pillar in their partnership, capable of enhancing market access, creating new opportunities for businesses, and promoting a resilient and diversified global supply chain.

Concrete

Om Birla: World Sees India as a Key Investment Destination

Speaker says India’s democracy and growth draw global confidence

Published

1 hour ago

November 4, 2025

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Lok Sabha Speaker Om Birla on Thursday said that the world is increasingly looking to invest in India, drawn by its vibrant democracy, rapid economic expansion, and technological prowess. Speaking at the 125th Anniversary Celebrations of the Bharat Chamber of Commerce in Kolkata, themed “India@100: An Age of a New Dawn,” Birla said that under the visionary leadership of Prime Minister Narendra Modi, the nation is steadily advancing towards becoming a global economic powerhouse.

He emphasised the government’s commitment to building a business-friendly environment, driven by the principles of minimum government, maximum governance. The administration, he said, is focused on reducing bureaucratic hurdles, expanding industrial capacity, and encouraging innovation. Birla also urged the private sector to invest more in research and development (R&D) and strive to meet global standards, assuring that the government will complement such efforts to strengthen India’s innovation-led growth.

Praising the Bharat Chamber of Commerce, Birla called it a source of inspiration for business chambers across India. He lauded its 125-year legacy of resilience, foresight, and public service, recalling its origins as the Marwari Chamber of Commerce. The Chamber, he noted, has played a key role in India’s industrial, social, and economic transformation and in promoting corporate social responsibility.

Birla observed that India’s success as a democracy lies in its stability, inclusiveness, and deep cultural roots. “Democracy in India is not just a system of governance, but a way of life,” he said, adding that the nation’s robust institutions ensure policy continuity and investor confidence, both crucial for long-term growth.

He stressed that where democracy thrives, sound policy decisions and effective implementation follow, creating a foundation for sustainable development. Birla also highlighted India’s rise as a global innovation hub, driven by strong public–private partnerships in technology and R&D, which are propelling India into leadership positions in emerging industries.

Touching on inclusive growth, Birla noted that the increasing participation of women and youth reflects India’s social transformation. He highlighted women’s growing role across sectors and said they will remain pivotal in shaping a self-reliant and developed India. Similarly, he praised India’s youth and entrepreneurs for driving creativity, enterprise, and innovation, shaping the country’s future with energy and vision.

Reaffirming the vision of Atmanirbhar Bharat, Birla called for stronger collaboration among industry, government, and academia to build a resilient, self-sustaining economy. He also underlined India’s emerging leadership in clean and green energy, expressing confidence that the country will play a leading role in addressing climate and environmental challenges globally.

Acknowledging West Bengal’s historical contribution to India’s growth, Birla said the state has long been a cradle of intellectual, cultural, and industrial excellence. He noted that Bengal has produced eminent thinkers, reformers, poets, and industrialists, and continues to inspire the nation with its enduring spirit of innovation and enterprise.

Concrete

Mumbai Metro, Monorail Told To Submit Disaster Plans

BMC orders SOPs and drills to strengthen emergency preparedness

Published

1 hour ago

November 4, 2025

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The Brihanmumbai Municipal Corporation (BMC) has directed Mumbai’s monorail and metro operators to submit detailed emergency management plans and Standard Operating Procedures (SOPs) for review, as part of efforts to bolster the city’s overall disaster preparedness framework.

The directive was issued during a meeting of civic authorities responsible for disaster management, held at the BMC headquarters on Wednesday. The session was convened to assess Mumbai’s emergency response mechanisms following the monorail breakdown near Bhakti Park, Chembur, on 19 August, which left several passengers stranded for hours due to a technical malfunction.

Dr Vipin Sharma, Chairperson of the Mumbai Suburban District Disaster Management Authority and Additional Municipal Commissioner (Western Suburbs), emphasised that the city’s monorail and metro systems must be integrated comprehensively into Mumbai’s emergency management strategy. He noted that these rapidly expanding networks require independent consideration given their critical role in public mobility.

Dr Ashwini Joshi, Chairperson of the Mumbai City District Disaster Management Authority and Additional Municipal Commissioner (City), instructed that mock drills be held regularly at all metro and monorail stations to assess and enhance emergency response capabilities.

Meanwhile, Dr Amit Saini, Additional Municipal Commissioner (Eastern Suburbs), said the session was aimed at reviewing coordination and readiness among key agencies in light of Mumbai’s expanding transport infrastructure. He stressed the importance of inter-agency collaboration to ensure rapid and efficient response during emergencies.

Professor Dr Ravi Sinha from the Indian Institute of Technology (IIT) Bombay commended the coordinated handling of the August 19 monorail incident, which involved the BMC’s disaster management department, Mumbai Fire Brigade, and other civic response teams.

Officials concluded that strengthening communication channels, training exercises, and real-time coordination between agencies would be central to improving the city’s ability to respond swiftly to future incidents involving its transport systems.