What is PS Ball? Weight Material PS Ball is heavier than sand, therefore it can be used as a mixing material in a counter balance.

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2 What is PS Ball? Precious Slag Ball is environment-friendly product with stable molecular structure from molten slag generated a steelmaking process at steel melting shop. Precious Slag Ball is a trademark of Ecomaister Co. Ltd, and used with permission. Diversified Applications of PS Ball Abrasive Blasting Material One of the major application areas of PS Ball is Abrasive Blasting Material. PS Ball can be used as a substitute for Garnet or Copper Slag and sometimes it can be used as a substitute for Steel Ball. Weight Material PS Ball is heavier than sand, therefore it can be used as a mixing material in a counter balance. Casting Sand PS Ball can be used as Casting Sand for the casting of nonferrous metals, with its special properties such as hardness, spherical shape, uniformed size and permeable effect. Water Treatment With its uniform and spherical shape, PS Ball can be used as filtration media for recycling treatment of industrial waste water. It has been proved to have higher efficiency than river sand for pollution removal. Roofing Granules PS Ball can be used widely as high resistant granules to produce asphalt roofing shingles. It has been proved that the appearance and useful life of shingles applied with PS Ball are better than crushed rock. Non-slip Material PS Ball has the property of high coefficient of friction and high resistant to slip. By applying it for the covering on the road, non-slip effect can be achieved greatly with durability of abrasion. Reinforcement Material Due to its special property of coherence with asphalt or concrete, and durability of abrasion, PS Ball can be used as Repair or Reinforcement Material with high efficiency. Poly-concrete Material PS Ball can be used as one of the main material for the production of Poly-concrete products. Using its property of cement-friendly, low water absorption and hardness, excellent Poly-con product can be made with big cost saving. Sand-pile Material For hardening of the ground of seashore or riverside, usually sand has been applied for pumping water. Using PS Ball, it can be done with high efficiency due to PS Ball s property of hardness, uniform and spherical shape. Road Pavement Material For Concrete Road, Concrete mixture using PS Ball can reduce the cost of cement and chemical admixture. Besides, the durability will be highly increased. For Asphalt Road, Black color of road can last longer using PS ball than conventional road, and the durability will be increased remarkably. Permeable Reactive Material Utilizing the properties of its hardness, uniform and spherical shape, PS Ball can be used as Permeable Reactive Material in waste (food or garbage) dumping area. PURNA BAJA HECKETT PS-BALL

3 Purna Baja Heckett, pt. is established in November 2, 1983 as a joint venture company between Purna Sentana Baja, pt. (Indonesia) and Harsco Corporation (United States of America). Purna Sentana Baja owns 60% of the Purna Baja Heckett shares, and another 40% owned by Harsco Corporation. Purna Sentana Baja runs the business on trade and service under Krakatau Steel Pension Fund Foundation. Harsco Corporation through MultiServ provides service in steel mill business field. MultiServ itself operates in 30 countries covering 120 locations worldwide. Before the cooperation established, Krakatau Steel as the biggest steel company in Indonesia relied on their own capability to manage their raw materials and other side product. By the time, Krakatau Steel could not manage it themselves, and searched for solution to solve the problem related in handling the raw materials and side products. Now Purna Baja Heckett run their business based on the contract with the Krakatau Steel. Service provide by Purna Baja Heckett including scrap management and processing, slag management, solid waste management, metal recovery and service on steelmaking Purna Baja Heckett produce PS Ball, Precious Slag Ball made of an atomizing liquid steel slag using SAT, Slag Atomizing Technology, patented by Ecomaister Co. Ltd. (South Korea) in an environmentally controlled process. PS Ball produced by Purna Baja Heckett has been certified for SNI and ISO 9001:2008 (I) and approved by Ministry of Environment, Republic of Indonesia as an Environmental Friendly Product, where activities that use PS Ball not required having permits (II). Related Website: pbhsteelslag.com krakatausteel.com harscometals.com ecomaister.com (I) Refer to Attachment A & B (II) Refer to Attachment C & D PURNA BAJA HECKETT PS-BALL

4 Steel Mill Service & PS Ball Producer TECHNICAL DATA SHEET SLAG ABRASIVE Page 1 of 1 DATE OF ISSUE : DECEMBER 2010 DESCRIPTION PS Ball, Precious Slag Ball made of an atomizing liquid steel slag using SAT, Slag Atomizing Technology SAT (Slag Atomizing Technology) is a new technology for processing steel slag into PS Ball. SAT produces Valuable, Enviromentally Friendly product with Ref. No. 928 Year 2008, Dated December 24, 2008 from Ministry of environment of Republic of Indonesia. AVERAGE CHEMICAL COMPOSITION PHYSICAL CHARACTERISTICS Fe Total % Loose bulk density : 2.3 kg/l Fe2O % Hardness : 7 8 mohs SiO % CaO % Appearance : Black Glossy Surface Al2O % with stable spinel MgO % structure Na2O Less than % Moisture Content % Melting Point : 1500 C 1550 C CAS No. MESH PS BALL CONSUMPTION RATE (GUIDE) # 4 10 SSPC SP 6/Sa 2 18 Kg/m2 # SSPC SP 10/Sa 21/2 32 Kg/m2 # SSPC SP 5/Sa 3 52 Kg/m2 # PURNA BAJA HECKETT PS-BALL

5 Steel Mill Service & PS Ball Producer Page 1 of 2 MATERIAL SAFETY DATA SHEET SLAG ABRASIVE DATE OF ISSUE : DECEMBER 2010 PRODUCT AND COMPANY INFORMATION COMPANY PT. PURNA BAJA HECKETT Jl. N2 Cigading Cilegon PO Box.136 Banten Indonesia TELEPHONE ( ) ; ; FAX NUMBER ( ) PRODUCT NAME TYPE / MODEL BRAND SLAG ABRASIVE IRON GRANULAR (PS BALL) MESH 4 10, MESH 10 20, MESH 20 40, MESH PBH A01 COMPLY WITH SNI STANDARD COMPOSITION PHYSICAL AND CHEMICAL PROPERTIES Chemical Formula Fe Total-Fe2O3-SiO2-CaO Physical State : Solid AI2O3-MgO-Na2O Appearance : Glassy surfase with a Moisture Content & Odor stable spinel structure Elements And Content & Odorless Fe Total % Fe2O % SiO % Melting Point : Around 1500 C 1550 C CaO % Al2O % Boiling Point : - MgO % Absorption Rate : 0,42 % Na2O Less than % of Water Moisture Content % Bulk Density : gr/cc - Loose CAS No. HAZARD IDENTIFICATION : PURNA BAJA HECKETT PS-BALL

6 Steel Mill Service & PS Ball Producer MATERIAL SAFETY DATA SHEET SLAG ABRASIVE Page 2 of 2 FIRT AID MEASURES Inhalation Eye Contact Skin Contact Ingestion Rinse thoroughly with water. Seek medical attention for abrasion Wash with soap and water Seek medical attention for discomfort FIRE FIGHTING MEASURE ACCIDENTAL RELEASE MEASURE Flash Point and Method Land Spill : Clean up spilled material Flammable Limits Not Combustibie Water Spill : Clean up spilled material Fire Fighting Equipment Not fire Hazardous HANDLING : It s safe to handle steel slag, however recommended to use personal protection EXPOSURE CONTROLS/PERSONAL PROTECTION Respirator Protection Eye Protection Skin Protection STABILITY AND REACTIVITIY General Dust expiosion Ignition Oxide ability Combustibility TOXICOLOGICAL INFORMATION Under ordinary condition no respiratory protection is required. Wear respirator/dust mask when exposed to dust above exposure limits Wear glasses or safety goggles to prevent contact with eyes Use gloves, shoes and protective clothing to prevent skin contact Product is stable (reactivity of spontaneous and water) ECOLOGICAL INFORMATION Skin corrosiveness : No Decomposition : There is no problem Stimulation (skin and eyes) : No Accumulation : There is no problem Acute toxicity : No Fish toxicity : There is no problem (including : lethal dose 50) Sub-acute toxicity : No Chronic toxicity : No Cancer field : No Mutation field : No (microorganism & abnormal Chromosome) Genital toxicity : No PURNA BAJA HECKETT PS-BALL

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