Crushing and Screening

Mobile crawler-mounted crushing and screening plant is witnessing advancements that induce higher mobility, fuel efficiency, ease of maintenance and more productivity. NBM Media reports.

A large number of new road projects are being rolled out across the country along with road widening from 2 to 4-laning and from 4 to 6-laning, which in turn is boosting demand for mobile Crushing and Screening plants. And, given the restricted timelines, contractors want machines that give assured performance with minimum set-up time coupled with minimum downtime. Manufacturers are coming to their aid by upgrading their machines so that they deliver better and faster.

Abhijeet Pai
Affirms Abhijeet Pai, President, Puzzolana Machinery Fabricators, "Contractors are looking for mobile crawler-mounted crushing and screening equipment that can be set up quickly in 3 to 4 hours of supply and up to 250tph capacity, and, of course, there is also the question of overall costs. To meet these expectations, we are offering mobile crawlers with both diesel and electric mode of operations and all the drives are standard/dust-proof electric motors. Puzzolana provides diesel generator onboard with a change-over switch to grid power, which substantially saves on cost compared to diesel, and also delivers high equipment uptime. Puzzolana had recently introduced a vertical shaft impactor in its crawler crushers to enhance the production capacity of fine aggregates and sand, and is also ensuring a seamless plant.

In view of the super expressways with 6 lanes and service roads, the need for aggregates requirements has increased, leading to reduced project completion time. This has led to demand for higher capacity plants of 300 to 800 tph (up from 200 tph). Also, with the restrictions being placed on use of natural sand for concrete road projects, there is increase in demand for manufactured sand plants.

Says Pai, "Especially for commercial plants that are fixed in nature, our Jaw crushers of higher capacities can be fine-tuned to meet mining requirement. We provide stockpiles between the primary jaw crusher station and the secondary cone crusher station. With stockpiles, independent operation of primary crusher, and (depending on the mining/quarrying hours) the plant owners can plan/create a stock. Further, the secondary and tertiary plant operations can be continuous, despite any breakdown or feed restriction in quarry/primary crushing with a stockpile arrangement. There would also be optimization of power consumption and flexibility in maintenance. All of this would lead to better operations from trucks for feeding to removal of finished products, power optimization etc."


He adds, "To ensure all-time availability of our plants, we have placed our service team at almost all the crushing zones and we have our experts at our branch offices across all regions and at our associates' locations. We have enhanced the capacities of our in-house foundries to take care of wear parts, and have added more stockpoints for spares."

Puzzolana Crawler Crushers

Today, Puzzolana is certified as "Approved Training Partner of Infrastructure Equipment Skill Council" to certify operators for crushing & screening plants.

Jaideep Shekhar

According to Jaideep Shekhar, MD, TEREX Materials Processing, India, demand for faster construction has become a major driver for customers to move towards mobility. "We have seen this trend for the last few years and it is one of the prime reasons for the growth of the tracked crushers and screeners industry in the Indian market. We have seen a similar phenomenon in the Iron Ore industry in the early 2000's when customers were opting only for Tracked Crushers and Screens to meet the strict deadlines for shipping iron ore to their export markets."

He informs that Terex Track Plants are best suited to meet the requirements in large projects that need to be completed in a relatively shorter period of time. "Terex is the market leader in Tracked Mobile Crushing and Screening market with two of our brands – Powerscreen and Terex Finlay - being the preferred choice of customers. We offer the largest selection of tracked machines that are manufactured locally to meet the price, delivery and quality requirements of Indian customers. Our range of products include Tracked Jaw Crushers and Cone Crushers, Tracked Two and Three Deck Screens and unique machines like Warriors and Tracked Conveyors. We also have an extensive range Tracked Impactors and Tracked Horizontal screens, which we import from our UK factory as per the requirements."

Warrior 600 Limestone

The company will be adding many new products to its tracked conveyor range, and will be launching the High Level Feeder Conveyor and the Low Level Feeder Conveyor in India, later this year. It is also adding its tracked 100 ft Conveyor to the 65ft and 80ft conveyors already available in the market.

Powerscreen Crushers

Etrack a subsidiary of Keestrack, which began operations in India recently with machines imported from its parent facility in Italy, Czech Republic and China will soon begin local manufacturing at its upcoming facility in Ghiloth, Neemrana,Rajasthan. Initially, the company will manufacture 200-300 tph primary and secondary track plants, with jaw and cone with on-board screen for the Indian market, and will also consider exporting the plants to South East Asian, African and Middle East Markets.

Keestrack person
According to Swapan Das, Managing Director and Topor Basu, Area Sales Manager, the overall objective will be to deliver a high level of productivity and plant availability at the lowest cost per ton. "We will be manufacturing plants in India for use in quarrying, cement and mining and will utilize our vast previous experience in tracked plants in India to bring in worthwhile modifications to suit the Indian conditions. Our selling proposition will be the low cost of operations as the plants can operate plugged into grid electricity ushering in savings of upto 70%. The diesel unit of the plant, coupled with the genset, ensures upto 30-40 percent savings on diesel. Our plants will bring faster ROI despite their seemingly higher initial costs."

Says Das, "Keestrack's concept of using powerful electric motors for the crusher/screener units and the necessary plant hydraulics (lifting cylinders, tracks etc) combined with several smaller e-drives for conveyors and ancillary equipment provide many other benefits in terms of safety, ease of operation and maintenance, availability and lower long-term total cost of ownership. By being able to use a significant smaller hydraulic circuit, the reduced oil volume minimizes leakage risks, optimizing the plant's environmental impact and maintenance costs. Reduced running hours of the onboard diesel when plugged in, lower rpm of engine extends service intervals and increases the resale value."

Keestrack PREBauma19 Electric

Das informs that the machines are fitted with alternator and Volvo Penta engines which ensure consistent power supply giving higher production in the long run. Another unique feature that ensures higher uptime is the ‘drop off' facility, in which, the diesel genset can be dismounted from the machine and can remotely operate through wires, if the site conditions are very dusty. Moreover, a secondary source of power can also be used to operate the plant while genset being repaired.

For the Indian market, Keestrack is considering medium and higher capacity machines, followed by smaller ones. It will economize on the machines' procurement cost with almost 90 percent localization through vendors who will develop jaw plates, cone crushers, and conclave mantles as per company standards, with a special emphasis on casting for quality. The company's target is to produce 25 units in India during the first year of its operation, and gradually increase production and expand its product portfolio.


Keestrack India is considering direct sales of its products and operational and maintenance contracts with customers. "This will help us curtail costs and enable us to have a closer liaison with our customers with a better understanding of their changing requirements and future plans," says Basu.

Ramesh Palagiri
According to Ramesh Palagiri, MD, Wirtgen India, Kleemann screens MS 702/703 EVO achieve a maximum output of 350 t/h while the MS 952/953 EVO gives an hourly output of up to 500 tons. "This high output is achieved by the good material stream through the plant. This starts with the infeed which, thanks to the generously-sized feed hopper, is possible by means of a wheel loader or an upstream crushing plant. The material is conveyed to the screen casing on the extra-wide feeding conveyor of 1,200 mm. Its screening angle can be adapted to the application. An impact plate on the conveyor discharge spreads the material evenly on the screen surface. Wear is thus kept to a minimum and a high throughput is guaranteed."

Elaborating on the safety aspects of the plants, Palagiri adds, "For the Kleemann EVO plants, there is greater safety as its operation is via a mobile control panel that can be attached at three different points on the plant. This guarantees the best viewing positions of the plant functions. All plant functions are started automatically – without each side discharge conveyor having to be activated individually. Data on machine operation can also be read off at the control panel. Plant movement is without jolts thanks to the proportionally activated hydraulic valves. The plants operate particularly efficiently and produce a high output when interlinked with crushing plants of the EVO series, whose size and output are tuned to the EVO screening plants. A further bonus for safe plant operation is the emergency-off function, which, in the case of an interlinked combination of plants, works across all screening and crushing stages."

Raj Shrivastava
TIL Limited-with its customer-centric approach, is re-orienting its product support services to provide more value to its customers, who largely comprise large and medium size quarry owners, corporate contractors, as well as sub-contractors. Says Raj Shrivastav, Executive in Charge – Crushing & Screening, TIL, "Many of the large road contractors and those involved in production of ready-mix concrete have been increasingly outsourcing their crushing requirements to quarry owners. This is essentially to curtail their cost of operations and meet their project timelines, since setting up and operating plants often require management of local resources, which is time-consuming. A prerequisite for outsourcing is the timely availability of the crushed aggregates in required quantities.

He further adds, "Our pan India reach and quick availability of service engineers on site, help customers further in preventive maintenance thereby minimizing equipment downtime. Operational intelligence on plant performance provided by TIL also enables customers to optimize their production plans, to meet their business requirement."

TIL is focused on timely availability of parts, lowering of operating costs, enhancing equipment availability. Says Shrivastsv, "Our plants are robustly designed keeping in mind the operating environment. The design also provides our customers the flexibility to adapt to the changing demands for products in the market."

TIL High Frequency Screen

TIL is in partnership with Telsmith Inc., Kolberg Pioneer Inc. (KPI), Johnson Crushers International (JCI) and Astec Mobile Screens (AMS), all of which belong to Astec Aggregate & Mining Group (AAMG). This co-operation results in the design, manufacture, marketing and service support of a range of world-class Track Mobile Plants, Wheeled Portable Plants, Stationery Plants, Unit Equipment manufactured at TIL's Kharagpur Works in West Bengal (viz. Jaw Crushers, Cone Crushers, Vertical Shaft Impactors, Vibrating Screens & Vibrating Grizzly Feeders) and High Frequency Screens for mining and quarry operations in India. TIL offers aggregate crushing plants up to 500 TPH from Astec Aggregate & Mining Group (a part of Astec Industries, Inc. US).

R S Raghavan
R S Raghavan, Managing Director, Proman Infrastructure Services, avers, "Proman modular relocatable skid plants are quite competitive in terms of the capex cost. The flexibility of foldable and quick setting of the conveyors are also an advantage. Plus, the company's strategy of placing the service team and parts supply within a radius of 200 kms is enabling us to support our customers most efficiently."

Bringing significant utility and value to earthmoving machines, of any brand or model, MB Crusher is offering the widest range of attachments in the industry. Products include Crusher Machines, Screening Machines, Drum Cutters, Demolition and Sorting Grapples and its newest product Shaft Screeners (officially launched at Bauma Munich this year).

Piero Guizzetti
Says Piero Guizzetti, CEO, MB India, "The application areas are many and we discover new ones as we engage with the market, not only in the construction and earthmoving domain, but also in some process industries. Some of the applications which we have implemented with great success in India include Demolition, Road Works, Recycling, Environmental Remediation, Quarries, Mines, Industrial, Urban Construction, and Tunneling projects."

He informs that except for the large units, most of the stone crushing units either buy stone from nearby mines or are situated close to the small mines. The smaller units mostly use a combination of local explosives, mechanical and manual stone breaking methods. The mined stones are then transported to the crusher sites by tractor trolleys or pay-loaders. This not only consumes valuable time but also adds significant logistical costs. Considering the tough geographical terrains in some parts of India, transportation cost impacts the price of the raw materials and more time is taken to reach the construction site.

Vertical Shaft Impactor

He adds, "MB products can be attached to any brand and model of excavator/backhoe loader, which means that crushing operations can be carried out directly at construction sites, helping contractors become independent from third party suppliers, and from delays and inflated costs, beyond their control. One of our esteemed customers has been quoted as saying: ‘Thanks to MB, we are getting more job orders because we are doing work which our competitors cannot, and are generating more revenue’."

Tata HItachi

As regards aftersales and aftermarket support Piero Guizzetti informs, "As a global market leader with an installed base spread across 150 countries, we try to imbibe the best global practices which are most pertinent to the Indian market, as aftersales support is of utmost importance here. When we came to India, we designed a very sustainable, flexible and dynamic service structure. We undertake scheduled visits to customer sites to ensure that our machines are being properly utilized, adequately maintained and operated by a trained person. We have warehouses spread across our network for prompt delivery of spares, and we maintain adequate stock for minimum 12 months. We have been in India for over 5 years now and will continue to invest in after-sales and service. This is because we hope to see India as one of our top 3 markets for the next 20 years."

MB provides operator training, engages on a regular basis with its sales and service partners, holds capacity building sessions, shares product knowledge and solutions to help its team members to provide the best product support and service.
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