Akhil Jha, Vice President – Technical, Shell India Markets
The cement industry has several pieces of heavy machinery equipment that work under extreme pressures and loads. Lubrication is critical to maintain the system running smoothly, quite literally. With a slew of specific lubricants designed for specific applications, customers can now design a detailed plan to manage the lubrication schedule at the plant. What is missing is the technical knowhow to choose and use the right product. Akhil Jha, Vice-president – Technical, Shell India Markets, with over twenty years of experience in oil sector which includes ten years at Shell and another ten years in a major public sector oil company, shines a spotlight on the right practices to follow. Excerpts from the interview.
Please elaborate on the importance of lubricants.
In the cement industry, mining and plant side equipments are often exposed to extreme working conditions. There are other environmental conditions like humidity and dust, high temperature variations, and heavy and shock loads to be handled by the lubricants.
There are major sections of cement plant that have variety of equipments, like ball mills, VRM, kiln, crushers, roller press, bucket elevator, conveyors, compressors, id fans, off-highway equipment, power plants, etc.
Critical equipment in these plants generally has to work 365 days a year and every hour of downtime is expensive for the company as it results in lost production. Production losses due to machine down time incur high cost in absence of redundancy. A high performance lubricant can have a significant impact on reducing the operating and maintenance cost. A high performance lubricant can offer following benefits
- Protection of equipment.
- Longer oil life.
- System efficiency.
How can one arrive at a proper lubricant changing schedule?
All major industrial equipment OEMs provide oil drain interval (ODI) based on the design aspects, auxiliary equipment recommendations, type of oil recommended and operating condition etc.
A good way to ensure efficient lubricant drain intervals as well as monitoring schedule for checking the overall condition of equipment is to utilise a strong used oil analysis program. A good used-oil analysis programme is integral to any successful maintenance management. With close monitoring of the condition of the oil in all critical applications like engine, gearbox, compressors, hydraulic system, circulating system in the power plant, an oil analysis programme can help to improve profitability by using:
- Less lubricant purchase.
- Less downtime.
- Less parts replacements.
- Less labour.
In oil analysis, we have to consider four major categories and cross-verify the same within the limit of OEM in correlation with equipment-operating parameters like temperature.
- Physiochemical parameters like TBN, TAN, viscosity, flash point, oxidation test , etc. Wear Metals – Al, Cu, Fe, Pb, Cr, Sn, etc.
- Contaminant: Water, Na, Si, Ca, etc.
- Additive Concentration: Zn, P, Ca.
How does one choose the right lubricant?
Normally, the simplest thing will be to follow OEMs` recommendation as lubricants are approved and recommended after proper evaluation considering operating conditions and equipment design.
However, there can be variation in anticipated condition hence OEM and Lubricant Technical Advisor must be consulted for equipment operating under special/severe conditions. Selection of the right lubricant for each application should always be based on the following considerations:
- Type or part to be lubricated.
- Speed and load.
- Criticality of operations.
- Viscosity grade.
- Current lubrication procedures
- The performance specification of lubricant
By using low quality lubricants, an expensive production equipment can breakdown due to lubricant failure resulting in:
- production loss due to downtime.
- expenses for repair/ replacement for the equipment parts.
It is critical to refer OEM recommendations like the operation and maintenance manual during selection of lubricant besides seeking advice from lubricant experts.
How do lubricants get contaminated and what are the consequent hazards?
Contamination can come from the following external sources:
- Water can result in corrosion, foaming, excessive wear, oxidation and deterioration of oil.
- Particulate contamination in form of lime, cement coal from atmosphere can result in malfunctioning of sensitive equipment leading to failure.
Can one overdose lubricant and does it have any impact on the performance?
Overfilling of oil can increase oil levels and there is a chance of oil leakage through level indicator openings, breather, etc.
Overfilling can also lead to a higher churn in the oil that can then lead to foaming and higher oil drag. This increases internal friction and impacts the system efficiency negatively. Internal friction can also lead to higher oil temperature which combined with foaming can increase risk of oxidation.
Tell us about the new age lubricants available in the market.
The cement industry has slowly started accepting synthetic lubricants due to high performance requirements in severe and highly loaded applications like VRM rollers, kiln support roller bearings, compressor oils, apart from benefits of reduced energy usage. Synthetic lubricants offer a longer oil life which can reduce number of oil changes hence increase productive time.
Cement industry is now using only specialty lubricants instead of bituminous compound for open gear and wire rope lubricant, which are not as environment friendly.
How did the industry perform last year? What are your projections for this year?
Cement consumption in India is expected to rise by 8-9 per cent taking the estimated cement consumption in 2013-14 to about 280-285 MT, from around 260 MT in the 2012-13, as per the Cement Manufacturers Association.Industry performance was not satisfactory last year as fewer number of new projects were commissioned in 2013, compared to the previous year. We are roughly expecting a growth of 8 per cent on our existing share from the expansion projects, also we hope that the cement plants will go back to operate at a hundred per cent of their installed capacity.Even though the industry did not perform so well over last couple of years, we were able to increase our wallet share at major cement groups by delivering value to their business. We are expecting to further increase our market share in 2014.
Who are your major clients in the cement sector?
Shell either directly or through its distributors, supplies to many major cement plants and their mines includes third party mining contractors and project sites of cement OEMs in India
Do you offer consultancy or total lubricant management services?
Our lubricant technical advisors conduct comprehensive study on site at a cement plant to assess the prevailing situations and practices and accordingly advise the customer on the use of the right lubricant for the right equipment, and address their lubrication challenges. We share best practices from around the world and help them realise maximum value from the use of Shell products and our expert services for lowering total cost of ownership.
Do you provide training in this area?
Shell has a on-site training service called LubeCoach. The objectives are to provide training to cement plant personnel on storage, the handling, dispensing and disposal of lubricants. We train them in the basics of lubrication, friction and wear, selection of right lubricant for the right machineries, etc.
Lubricants from shell
- Shell Rimula: Engine oil.
- Shell Omala: Industrial gear oil.
- Shell Tellus: Hydraulic oil.
- Shell Corena: Compressor oil.
- Shell Morlina: Bearing and circulating oil.
- Shell Gadus: Greases, products for open gear and wire rope applications.
- Shell Spirax: Axle and transmission oils.
- Shell Argina: Marine engine lubricants.
Indian cement industry is well known for its energy and natural resource efficiency
Dr Hitesh Sukhwal, Deputy General Manager – Environment, Udaipur Cement Works Limited (UCWL) takes us through the multifaceted efforts that the company has undertaken to keep emissions in check with the use of alternative sources of energy and carbon capture technology.
Tell us about the policies of your organisation for the betterment of the environment.
Caring for people is one of the core values of our JK Lakshmi Cement Limited. We strongly believe that we all together can make a difference. In all our units, we have taken measures to reduce carbon footprint, emissions and minimise the use of natural resources. Climate change and sustainable development are major global concerns. As a responsible corporate, we are committed with and doing consistent effort small or big to preserve and enrich the environment in and around our area of operations.
As far as environmental policies are concerned, we are committed to comply with all applicable laws, standards and regulations of regulatory bodies pertaining to the environment. We are consistently making efforts to integrate the environmental concerns into the mainstream of the operations. We are giving thrust upon natural resource conservation like limestone, gypsum, water and energy. We are utilising different kinds of alternative fuels and raw materials. Awareness among the employees and local people on environmental concerns is an integral part of our company. We are adopting best environmental practices aligned with sustainable development goals.
Udaipur Cement Works Limited is a subsidiary of the JK Lakshmi Cement Limited. Since its inception, the company is committed towards boosting sustainability through adopting the latest art of technology designs, resource efficient equipment and various in-house innovations. We are giving thrust upon renewable and clean energy sources for our cement manufacturing. Solar Power and Waste Heat Recovery based power are our key ingredients for total power mix.
What impact does cement production have on the environment? Elaborate the major areas affected.
The major environmental concern areas during cement production are air emissions through point and nonpoint sources due to plant operation and emissions from mining operation, from material transport, carbon emissions through process, transit, noise pollution, vibration during mining, natural resource depletion, loss of biodiversity and change in landscape.
India is the second largest cement producer in the world. The Indian cement industry is well known for its energy and natural resource efficiency worldwide. The Indian cement industry is a frontrunner for implementing significant technology measures to ensure a greener future.
The cement industry is an energy intensive and significant contributor to climate change. Cement production contributes greenhouse gases directly and indirectly into the atmosphere through calcination and use of fossil fuels in an energy form. The industry believes in a circular economy by utilising alternative fuels for making cement. Cement companies are focusing on major areas of energy efficiency by adoption of technology measures, clinker substitution by alternative raw material for cement making, alternative fuels and green and clean energy resources. These all efforts are being done towards environment protection and sustainable future.
Nowadays, almost all cement units have a dry manufacturing process for cement production, only a few exceptions where wet manufacturing processes are in operation. In the dry manufacturing process, water is used only for the purpose of machinery cooling, which is recirculated in a closed loop, thus, no polluted water is generated during the dry manufacturing process.
We should also accept the fact that modern life is impossible without cement. However, through state-of-the-art technology and innovations, it is possible to mitigate all kinds of pollution without harm to the environment and human beings.
Tell us about the impact blended cement creates on the environment and emission rate.
Our country started cement production in 1914. However, it was introduced in the year 1904 at a small scale, earlier. Initially, the manufacturing of cement was only for Ordinary Portland Cement (OPC). In the 1980s, the production of blended cement was introduced by replacing fly ash and blast furnace slag. The production of blended cement increased in the growth period and crossed the 50 per cent in the year 2004.
The manufacturing of blended cement results in substantial savings in the thermal and electrical energy consumption as well as saving of natural resources. The overall consumption of raw materials, fossil fuel such as coal, efficient burning and state-of-the-art technology in cement plants have resulted in the gradual reduction of emission of carbon dioxide (CO2). Later, the production of blended cement was increased in manifolds.
If we think about the growth of blended cement in the past few decades, we can understand how much quantity of , (fly ash and slag) consumed and saved natural resources like limestone and fossil fuel, which were anyhow disposed of and harmed the environment. This is the reason it is called green cement. Reduction in the clinker to cement ratio has the second highest emission reduction potential i.e., 37 per cent. The low carbon roadmap for cement industries can be achieved from blended cement. Portland Pozzolana Cement (PPC), Portland Slag Cement (PSC) and Composite Cement are already approved by the National Agency BIS.
As far as kilogram CO2 per ton of cement emission concerns, Portland Slag Cement (PSC) has a larger potential, other than PPC, Composite Cement etc. for carbon emission reduction. BIS approved 60 per cent slag and 35 per cent clinker in composition of PSC. Thus, clinker per centage is quite less in PSC composition compared to other blended cement. The manufacturing of blended cement directly reduces thermal and process emissions, which contribute high in overall emissions from the cement industry, and this cannot be addressed through adoption of energy efficiency measures.
In the coming times, the cement industry must relook for other blended cement options to achieve a low carbon emissions road map. In near future, availability of fly ash and slag in terms of quality and quantity will be reduced due to various government schemes for low carbon initiatives viz. enhance renewable energy sources, waste to energy plants etc.
Further, it is required to increase awareness among consumers, like individual home builders or large infrastructure projects, to adopt greener alternatives viz. PPC and PSC for more sustainable
What are the decarbonising efforts taken by your organisation?
India is the world’s second largest cement producer. Rapid growth of big infrastructure, low-cost housing (Pradhan Mantri Awas Yojna), smart cities project and urbanisation will create cement demand in future. Being an energy intensive industry, we are also focusing upon alternative and renewable energy sources for long-term sustainable business growth for cement production.
Presently, our focus is to improve efficiency of zero carbon electricity generation technology such as waste heat recovery power through process optimisation and by adopting technological innovations in WHR power systems. We are also increasing our capacity for WHR based power and solar power in the near future. Right now, we are sourcing about 50 per cent of our power requirement from clean and renewable energy sources i.e., zero carbon electricity generation technology. Usage of alternative fuel during co-processing in the cement manufacturing process is a viable and sustainable option. In our unit, we are utilising alternative raw material and fuel for reducing carbon emissions. We are also looking forward to green logistics for our product transport in nearby areas.
By reducing clinker – cement ratio, increasing production of PPC and PSC cement, utilisation of alternative raw materials like synthetic gypsum/chemical gypsum, Jarosite generated from other process industries, we can reduce carbon emissions from cement manufacturing process. Further, we are looking forward to generating onsite fossil free electricity generation facilities by increasing the capacity of WHR based power and ground mounted solar energy plants.
We can say energy is the prime requirement of the cement industry and renewable energy is one of the major sources, which provides an opportunity to make a clean, safe and infinite source of power which is affordable for the cement industry.
What are the current programmes run by your organisation for re-building the environment and reducing pollution?
We are working in different ways for environmental aspects. As I said, we strongly believe that we all together can make a difference. We focus on every environmental aspect directly / indirectly related to our operation and surroundings.
If we talk about air pollution in operation, every section of the operational unit is well equipped with state-of-the-art technology-based air pollution control equipment (BagHouse and ESP) to mitigate the dust pollution beyond the compliance standard. We use high class standard PTFE glass fibre filter bags in our bag houses. UCWL has installed the DeNOx system (SNCR) for abatement of NOx pollution within norms. The company has installed a 6 MW capacity Waste Heat Recovery based power plant that utilises waste heat of kiln i.e., green and clean energy source. Also, installed a 14.6 MW capacity solar power system in the form of a renewable energy source.
All material transfer points are equipped with a dust extraction system. Material is stored under a covered shed to avoid secondary fugitive dust emission sources. Finished product is stored in silos. Water spraying system are mounted with material handling point. Road vacuum sweeping machine deployed for housekeeping of paved area.
In mining, have deployed wet drill machine for drilling bore holes. Controlled blasting is carried out with optimum charge using Air Decking Technique with wooden spacers and non-electric detonator (NONEL) for control of noise, fly rock, vibration, and dust emission. No secondary blasting is being done. The boulders are broken by hydraulic rock breaker. Moreover, instead of road transport, we installed Overland Belt Conveying system for crushed limestone transport from mine lease area to cement plant. Thus omit an insignificant amount of greenhouse gas emissions due to material transport, which is otherwise emitted from combustion of fossil fuel in the transport system. All point emission sources (stacks) are well equipped with online continuous emission monitoring system (OCEMS) for measuring parameters like PM, SO2 and NOx for 24×7. OCEMS data are interfaced with SPCB and CPCB servers.
The company has done considerable work upon water conservation and certified at 2.76 times water positive. We installed a digital water flow metre for each abstraction point and digital ground water level recorder for measuring ground water level 24×7. All digital metres and level recorders are monitored by an in-house designed IoT based dashboard. Through this live dashboard, we can assess the impact of rainwater harvesting (RWH) and ground water monitoring.
All points of domestic sewage are well connected with Sewage Treatment Plant (STP) and treated water is being utilised in industrial cooling purposes, green belt development and in dust suppression. Effluent Treatment Plant (ETP) installed for mine’s workshop. Treated water is reused in washing activity. The unit maintains Zero Liquid Discharge (ZLD).
Our unit has done extensive plantations of native and pollution tolerant species in industrial premises and mine lease areas. Moreover, we are not confined to our industrial boundary for plantation. We organised seedling distribution camps in our surrounding areas. We involve our stakeholders, too, for our plantation drive. UCWL has also extended its services under Corporate Social Responsibility for betterment of the environment in its surrounding. We conduct awareness programs for employees and stakeholders. We have banned Single Use Plastic (SUP) in our premises. In our industrial township, we have implemented a solid waste management system for our all households, guest house and bachelor hostel. A complete process of segregated waste (dry and wet) door to door collection systems is well established.
Tell us about the efforts taken by your organisation to better the environment in and around the manufacturing unit.
UCWL has invested capital in various environmental management and protection projects like installed DeNOx (SNCR) system, strengthening green belt development in and out of industrial premises, installed high class pollution control equipment, ground-mounted solar power plant etc.
The company has taken up various energy conservation projects like, installed VFD to reduce power consumption, improve efficiency of WHR power generation by installing additional economiser tubes and AI-based process optimisation systems. Further, we are going to increase WHR power generation capacity under our upcoming expansion project. UCWL promotes rainwater harvesting for augmentation of the ground water resource. Various scientifically based WHR structures are installed in plant premises and mine lease areas. About 80 per cent of present water requirement is being fulfilled by harvested rainwater sourced from Mine’s Pit. We are also looking forward towards green transport (CNG/LNG based), which will drastically reduce carbon footprint.
We are proud to say that JK Lakshmi Cement Limited has a strong leadership and vision for developing an eco-conscious and sustainable role model of our cement business. The company was a pioneer among cement industries of India, which had installed the DeNOx (SNCR) system in its cement plant.
NTPC selects Carbon Clean and Green Power for carbon capture facility
Carbon Clean and Green Power International Pvt. Ltd has been chosen by NTPC Energy Technology Research Alliance (NETRA) to establish the carbon capture facility at NTPC Vindhyachal. This facility, which will use a modified tertiary amine to absorb CO2 from the power plant’s flue gas, is intended to capture 20 tonnes of CO2) per day. A catalytic hydrogenation method will eventually be used to mix the CO2 with hydrogen to create 10 tonnes of methanol each day. For NTPC, capturing CO2 from coal-fired power plant flue gas and turning it into methanol is a key area that has the potential to open up new business prospects and revenue streams.
Sustainable Mining for the Future
ICR presents a case for responsible reporting across the mining supply chain.
The importance of mining, in times of sustainability reporting, is rising in stature. The rise of mining output is not waning but growing and the share of construction mineral ore in all of this still remains close to 50% of the entire extractive output.
It is estimated that the global combined extractive output in mining is going to grow to 167gt in 2060, from the 2019 statistics of 92 gt. Out of this 27% is biomass, 15% is fossil fuel, 9% is metal ores and the balance is non-metallic minerals, bulk of which goes to the construction industry. While sustainability considerations would be driving most of the future growth, most notably, metals will be needed for electric storage batteries (eg. for electric cars), which require aluminium, cobalt, iron, lead, lithium, manganese and nickel but also for other relevant technologies, including those used for the production of wind turbines and solar panels; far greater amounts of metals are needed for clean energy production than the traditional energy production from fossil fuels. Thus the growth in metals for sustainability will offset the drop in extraction that would stem from growth in recycling.
An overview of the mining sector
Mining for non-metallic minerals, from where the construction industry sources all its inputs, perhaps falls under the ASM (artisanal and small-scale mining), which has still remained labour intensive and suffers from safety issues all across, the developed world and developing, all have the similar challenges to grapple with. Efforts to increase automation, mechanisation and digitisation also come with the fair share of demands from the local community, which can hardly be neglected. While Large Scale Mining (LSM) is moving towards mechanisation and automation with minimum labour resources, the focus is increasingly shifting towards partnerships on supply chains that connect local procurement partners and the community at large to the external markets.
One of the significant developments has been the shift towards battery-electrification of mobile equipment in the mines to the complete automation of all mining equipment with Net zero targets in focus. There are man-less mines in existence already where underground operations are being orchestrated through battery-electric equipment remotely connected through control systems. The partnerships between mining companies and the mining equipment OEMs is ensuring a smooth transition in this area that will take the use of fossil fuels in mines to a negligible proportion (mostly as consumables) in the near future. This however calls for a skills inventory crossover, that would need larger hand holding with the local government and other institutions as well as the local communities.
Sustainability in mining
The goals of sustainable development in mining would include transparency as a key theme between a large pool of actors that constitute and connect the upstream to the downstream supply chain partners (supplier, trader, smelter refiner, component producer, contract manufacturer, end user, intermediaries, agents and transporters). This would also entail collaboration with governments and across the supply chain to support a circular economy to minimise inputs to waste from the mining process and to increase the reuse, recycling and repurposing of raw materials and products to improve sustainable consumption. The traceability systems also ensure that the level of information that is shared and disclosed along the value chain. They illustrate the chain of custody, which is the sequence of stages and custodians the product is transferred to through the supply chain.
The transparency of reporting across the entire supply chain is at the core of this and this has two parts:
- Minimise resource use and waste (use of water, energy, land and chemicals and minimise production of effluent, waste and chemicals) and also purpose waste rock
- Incorporate life cycle thinking (extend responsible sourcing to all suppliers and collaborate to connect the consumer with sustainable raw materials).
India-centric big picture
India as a country has progressed well in SDG Reporting and Sustainable Development in the mining sector that accounts for 2.5% of the country’s GDP. Many of the key companies of the sector are SOEs. India is abundant in natural mineral resources and the country is one of the world’s main producers of iron ore and bauxite. India is the third largest producer of coal, behind the US and China. In construction related extractive minerals, India is the world’s second largest producer. Section 135 of India’s Companies Act on CSR and Regulation for large public companies to produce Business Responsibility Reports, makes it imperative for Large Mining companies (both metallic and non-metallic extractive ones) to be part of the SDG reporting, that cover diverse range of sustainability areas including GHG gas emissions, energy use, stakeholder engagement and labour and human rights.
In 2011, the Indian Ministry of Corporate Affairs issued the National Voluntary Guidelines on the Social, Environmental and Economic Responsibilities of Business (NVGs). Building on the NVGs, a new guidance entitled the National Guidelines on Responsible Business Conduct (NGRBC) was released in 2018. The new guidance integrates the ‘Respect’ pillar of the United Nations Guiding Principles and the UN Sustainable Development Goals.
Following other countries, India is also on the path of developing sustainability guidelines for the end-to-end supply chains in the mining sector. This will only ensure stakeholder participation for safety and sustainability in all four stages: profiling, reservation, exploration and departure. For future growth in mining, that will entail coal, iron-ore, bauxite and limestone extraction as the top four mining categories, it is an absolute necessity that focus on SDG reporting is carried through beyond the voluntary reporting mandate to encompass the aspirations of the communities and investors who would be the major beneficiaries of such initiatives. Without their blessings, the growth in these sectors would be mired by distrust and lack of transparency, which remains to be one of the dampeners for sustainable growth in mining.