Companhia Siderúrgica Nacional

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2 Companhia Siderúrgica Nacional CSN operates in five sectors: IRON AND STEEL INDUSTRY, MINING, LOGISTICS, CEMENT and ENERGY. 2nd largest producer and exporter of iron ore from Brazil 6th largest producer of iron ore in the world CASA DE PEDRA MINE Congonhas/MG Fundation: 1913; Area: ha; Production (2016): 32Mt; Integrated System: Mine / Railroad / Porto; Casa de Pedra Mine (IRON ORE)

3 Control of Fuel Supply Possibilities for control of fuel supply equipment: 1 Manual fuel supply control (through equipment operators): The operator identifies the need and supply requests release of offset fuel station.

4 Control of Fuel Supply Possibilities for control of fuel supply equipment: 2 Automatic fuel supply control (through fuel reduction in fleet control): The fleet management system uses a logic of decrease of fuel by inserting the average fuel consumption (litres/hour) and the number of hours of operation for each equipment. 2.1 Supply manual allocation 2.2 Automatic supply allocation Control Room - CSN

5 Control of Fuel Supply Possibilities for control of fuel supply equipment: 3 ONLINE fuel supply control (through the use of telemetry): The dispatch system reads the network CAN (Controller Area Network), extracting realtime diesel volume information contained in equipment.

6 Case Study 1 Road equipment: Manual Fuel supply control Automatic fuel supply control Mercedes Actros 8x4 Nominal Payload Capacity: 32 t Fuel Tank: 400 l Number of equipment: 135

7 Case Study 1 Introduction: - Manual fuel supply control (through equipment operators): Low fuel supply volume per event (average of 59% of tank capacity); High level of queue at fuel station in night period; Small vehicles fuel supply prioritization in administrative period; 33% 31% 29% 27% 31% % Queue - Fuel station 27% 25% 23% 21% 19% 17% 21% 20% 15% 00:00 às 06:00 06:00 às 12:00 12:00 às 18:00 18:00 às 24:00

8 Case Study 1 Metodology: - Fuel supply module deployment (Smartmine system); - Automatic fuel supply control (through fuel reduction in fleet control) This methodology has manual intervention: odometer insertion and operation time

9 Percent Case Study 1 Results: - Increase in average liters of fuel supply and reduction of standard deviation: Análise de abastecimentos Normal Frota Transporte Variable JUN JUL AGO SET OUT Mean StDev N 253,4 58, ,8 52, ,6 46, ,1 42, ,4 37, Litros

10 Case Study 1 Results: Increase of 11.4% at average volume fueled; Reduction of 10.3% in the number of fuel supply; Reduction of 26.3% in queue at fuel station (hours); Increase of 0.61% in effective use of the transport fleet (equivalent to monthly hours of operation); Annual operating cost reduction of US$ 406,400

11 Fuel Supply control Case Study 2 Off road equipment: Automatic fuel supply control ONLINE fuel supply control CAT 793F Nominal Payload Capacity: 240 t Fuel Tank: l Average fuel consumption: 125 l/h Number of equipment: 34

12 Fuel Supply control Case Study 2 Metodology Use of VIMS system for reading on the fuel level in real time; Integrating with the dispatch system Intellimine; Automatic targeting equipment to fuel station

13 Fuel Supply control Case Study 2 Monitoring and control screen of the fuel level

14 Fuel Supply control Case Study 2 Conditions for automatic fuel supply designation FUEL STATION Fuel level below 25% Availability at the fuel station Location within 2 km of the fuel station

15 Fuel Supply control Case Study 2 Preliminary analysis - Period 1 (January to may/2017)

16 Fuel Supply control Case Study 2 Results - Period 2 (June to December / 2017)

17 Fuel Supply control Case Study 2 Results: Increase of 15.6% at average volume fueled; Reduction of 26.1% in the number of fuel supply; Increase of 0.3% in effective use of the transport fleet; Annual operating cost reduction of US$ 626,470

18 Fuel Supply control Results: Results Savings Case Study 1 (US$) 406,400 Case Study 2 (US$) 626,470 TOTAL (US$) 1,032,87

19 New technologies In mining the energy source used in the transport of material is diesel oil Recently developed the largest electric truck in the world: the edumper - Nominal Payload Capacity: 65 t - Battery pack boasting 700 kwh of storage capacity The edumper start the operation in a quarry in Péry (Switzerland) The truck will transport more than 300,000 tons/year, with useful life of 10 years. Reduction of 500,000 liters of diesel; Reduction of carbon dioxide emissions around 1,300 t.

20 New technologies The edumper rises up the hillside to the empty mine and down loaded with 60 tonnes of ore. Thus, the consumption is of 30 kwh in the climbs, while downhill and does not consume energy, the electric motor still generates 40 kwh, using the electric motor as a generator energy which is completely stored in the batteries. According to the manufacturers and operating conditions, it is an electric vehicle that produces more energy than it consumes.

21 Thank You! Questions? Walter Schmidt Felsch Junior, MSc. Mining Engineer (31) / (31)