NAWA Launching High Capacity Mobile Crushing System at Excon 2007

To meet the high aggregate need of the present days time bound fast-track construction projects, Nawa Engineers will introduce its High Capacity Mobile Crushing System at Excon 2007. This was disclosed by Mr. G.N. Raju, Managing Director, Nawa Engineers in an interview with SKK.

Kindly mention about the fuel efficiency of your crushers and highlight the features of the engines which make the crushers fuel-efficient.
Mostly, the crushers by all global manufacturers are electric motor driven, and the electrical power to the motor either comes from dedicated diesel generator sets or from a state power grid.

Our range of crushers – single toggle jaw crushers, roller bearing cone crushers, and VSI crushers - are all energy efficient. They are designed with heavy-duty frictionless roller bearings to reduce power consumption. We have observed our crushers powered with same motors deliver 15-25% higher rated output resulting lesser per ton cost of power consumption.

Since the Indian market is witnessing demand of high capacity crushers at a range of 300 TPH and above, in lieu of the same what are the advanced technical features you are incorporating in your crushers for higher productivity? Provide details on the improved technology and higher capacity features for enhanced productivity.
Nawa Engineers has already built high capacity aggregate crushing plants with its big crushers, namely, a 200-400 TPH 44"x32" jaw crusher, a long head gyratory secondary cone working in tandem with its roller bearing cone crusher for a throughput of 450 TPH, and a twin drive 400-550 TPH 2x200 kW VSI tertiary crusher in tertiary crushing. These combinations are already in successful operation at highway projects and commercial aggregate plants.

We are now launching High Capacity Mobile Crushing Systems at Excon’07 for capacities 300 TPH and above. These are unique configurations, designed with our big size crushers mounted on wheel chassis for quick setup and faster movement. They comprise a 3-axle primary jaw mobile with our 48"x36" single toggle jaw crusher of capacity 300-600 TPH, secondary twin-cone mobile with a long head and short head cone crushers on a 2-axle chassis and a tertiary twin-drive VSI mobile on 2-axle chassis.

The high capacity Nawa Mobile Stations are designed putting into them in-depth knowledge and experience, and in arranging them into a well balanced system, which would guarantee a plus 300 TPH of high quality end products meeting the high end fast track infrastructure projects, at the lowest cost per ton of aggregates or mineral ores.

Kindly mention about the automated features and the computerized control features in your crushers by giving the advanced automated features, please justify how the machines are capable of higher productivity/output.
A high degree of system automation and machine safety features have long been introduced into our system designs and machine operations. For example, all our hydraulic cone crushers are provided with double safety features for tramp iron release inbuilt into the electro hydraulic circuits.

These machine safety features are found to be of great help in reducing the shutdown time and contributing higher plant productivity.

Given the high capacity requirements for the market, what are the different ranges of high capacity crushers being planned by your company for launch in near future?
The need of aggregates for the present day time bound fast-track construction projects–airports, SEZs, longer stretches of BoT expressways, large-scale commercial quarries–is increasing in terms of tons per hour production to meet the tight completion schedules.

The 200 TPH plants hitherto in great demand are not adequate to meet the aggregates needs of these high-end projects. The requirements are getting increased to 300 TPH and more. Nawa has already designed, manufactured and installed high capacity crushers. A 44"x32" primary jaw crusher of capacity 200-400 TPH, a 48"x36" primary jaw crusher of capacity 300-600 TPH, a long head secondary gyratory cone of capacity 200-350 TPH, a twin-drive VSI crusher of capacity 400-500 TPH are the additions to our crusher range, and have already been launched to meet the higher plant capacity requirements. Nawa also simultaneously undertook development of bigger screening equipment of sizes 2.1m wide x 6.0 m long two and three decks and a four deck screen of size 1.8 m wide x 4.8 m long, which would meet the product classification requirements Of these high capacity plants.

Since higher output/productivity of the crushers are based on maintaining the equipment at an appropriate order, what are the necessary information guidelines and manufacturers maintenance schedule you have at your end for the customers to maintain the equipment properly?
Nawa always gives great importance to the proper maintenance and operation of the equipment it has supplied, as it is the key for maximizing the productivity. Nawa provides to the customers the operation and maintenance manuals that are prepared with great care and detail, which serve as bible for the operating crew of the customers. Nawa takes great pains to educate the plant crew as to how the plant productivity can be optimized for the benefit of the customers. Nawa’s expert engineers render on-the-job training to the operators at the time of commissioning and for extended periods, as may desired.

Our after-sales-service teams are battle-ready to reach site and guide the operating crew from small to complete care of the equipment. Nawa, however desires that the owner should deploy skilled and competent manpower for plant operation and maintenance to achieve the best production results. We also strongly recommend use of quality spare parts and wear liners, and strictly use all consumables like oils, grease, filtering elements etc as per specifications given in the equipment manuals. This aspect often gets neglected and leads to frequent breakdowns and loss of production.

Mention some high-end construction projects in the country where your crushers are in operation.
A few of our recent crusher plant installations include:

• Hyderabad International Airport Project: 200 TPH 3-stage mobile crusher plant for M/s Robo-GMR.
• NH 7 BoT Road Project, Bangalore: 270 TPH 2-stage mobile crusher plant for M/s Patel-KNR JV.
• Reliance Petro-chemical Complex Expansion Project, Jamnagar: 200 TPH 3-stage mobile crusher plant for M/s Robo Silicone.
• NH–7 BoT Road Project, Nagpur: 250 TPH 3-stage stationary crusher plant for M/s Atlanta Limited.
• Chutak Hydro Electric Project, Kargil, J&K: 70 TPH 3-stage stationary crusher plant for M/s HCC Ltd.
• NH–7 Karur-Nammakkal BoT Road Project: 200 TPH 3-stage mobile crusher plant for M/s Gannon Dunkerly & Co.
• KNNL Canal Project, Karnataka: 200 TPH 2-stage mobile crusher plant for M/s IVRCL.
• Budhil Hydo Electric Project, Himachal Pradesh: 70 TPH 3-stage stationary crusher plant for M/s Coastal Projects Pvt. Ltd.