BROADENING OUR HORIZONS - Arrium

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OneSteel Annual Report 2011126OneSteel — Iron Baron and South Middleback Range Ore Beneficiation StockpilesThese are resources currently held in historically built stockpiles that will be beneficiated to yield usable ore.Ore beneficiation commenced in the 2005 financial year at Iron Duke. A new facility is currently under construction at Iron Baron. Bothdraw feed from current and future mining activities and the Ore Beneficiation Stockpiles.Ore suitable for beneficiation is constantly being added to stockpiles at the mining operations due to recovery of resource outside ofdeclared reserve.Beneficiation stockpile tonnes have remained the same after depletion due to processing being matched by mining additions.The Ore Beneficiation Stockpiles with a mean estimated grade exceeding 45% Fe that can be beneficiated to meet current export gradespecifications comprise the Mineral Resources in the following table. Tonnes are reported before considering beneficiation yield, andgrades are reported uncalcined. The estimates are valid as at 30 June 2011.WHYALLA (MIDDLEBACK RANGE) HEMATITE RES<strong>OUR</strong>CESAS AT30 JUNE 2011AS AT30 JUNE 2010Category Measured Resources InDicated Resources Inferred Resources Total Resources 2011 Total Resources 2010typeTotal Quantity Hematite, Goethite,Limonite, MinormagnetiteTonnes(Mt dry)Fe Grade(% uncalcined)Tonnes(Mt dry)Fe Grade(% uncalcined)Tonnes(Mt dry)Fe Grade(% uncalcined)Tonnes(Mt dry)Fe Grade(% uncalcined)Tonnes(Mt dry)OneSteelInterestFe Grade(% uncalcined)%CompetentPerson4.0 53.6 5.7 53.2 10.2 53.9 19.9 53.6 19.9 53.7 100 P. Leevers
GlossaryThe CompanyThe GroupThe Moly-Cop GroupOneSteel Limited and/or its subsidiaries, as the context admits. Also referred to as OneSteel.OneSteel Limited and/or its subsidiaries, as the context admits. Also referred to as OneSteel.The Moly-Cop and AltaSteel businesses acquired by OneSteel on 31 December 2010 from Anglo American plc.BilletBillet is a section of cast steel approximately 127mm to 175mm square and 12 metres long which is used toproduce rod and bar.Blast furnaceFurnace used for converting iron ore into pig iron.C&F, CFRCost and freight, amount includes freight cost.Corporations ActCorporations Act 2001 (Cth)CRUA London-based consulting group that provides business information and market analysis in the areas ofnon-ferrous metals, steel and ferro-alloys and wire and cable.DespatchesTerm used for total tonnes sold to end markets.Electric Arc Furnace Furnace used to convert scrap steel into molten steel.Hematite An iron oxide with the chemical formula Fe 2O 3.Integrated steelworks An integrated steelworks uses blast furnace and basic oxygen steelmaking technology to manufacturesteel from iron ore.Lost Time InjuryFrequency RateA statistical measure of safety performance. A lost time injury is an injury which is attributable toa workplace incident and which results in at least one full shift of work being lost at some time (notnecessarily immediately) after the shift during which the injury occurred.Lost time injury frequency rate is the number of lost time injuries per million hours worked and iscalculated as follows: lost time injury frequency rate equals number of lost time injuries per reportingperiod times one million, divided by hours worked per reporting period.Magnetite An iron oxide with the chemical formula Fe 3O 4.Medical Treatment Injury A statistical measure of safety performance.Frequency RateA medical injury is an injury which is attributable to a workplace incident, requires medical treatment(including restricted work) and results in less than a full shift of work being lost. Injuries which result in aleast one full shift of work being lost are classified as lost time injuries (refer above).The medical treatment injury frequency rate is the number of medical treatment injuries per million hoursworked and is calculated as follows: medical treatment injury frequency rate equals number of medicaltreatment injuries per reporting period times one million, divided by hours worked per reporting period.Non-CISIn the context of prices for Asian imports of hot rolled coil, it refers to product not sourced from theregion previously known as the Soviet Union.OreMineral bearing rock.Ore ReserveRepresents what is currently economically feasible to mine.Ore ResourceRefers to the total ore body.Pellet plantThe pellet plant takes iron ore and produces hard balls of iron ore that can be fed into the blast furnace.PlateLarge flat sections of steel used for the manufacture of tanks, pressure vessels etc.PlattsGlobal provider of energy and metals information and source of benchmark price assessments in thephysical energy markets.ProductionTerm used to define total tonnes produced in particular product.Raw steelRaw steel is produced at the Whyalla Steelworks and the Sydney Steel Mill and is cast in the form of billet,bloom and slab steel.Reinforcing steelUsed for reinforcing concrete.Rod and barRod and bar is semi-finished product that can be used for further value added products such as wire,reinforcing steel, grinding media, posts etc.SBBSteel Business Briefing is an independent publisher that provides news and information to the globalsteel industry.Scope 1Direct emissions generated. Emissions that are the release of greenhouse gases into the atmosphere as adirect result of an activity, or series of activities (including ancillary activities) that constitute the facility.Scope 2Indirect emissions generated. Emissions that are the release of greenhouse gases into the atmosphereas a direct result of one or more activities that generate electricity, heating, cooling or steam that isconsumed by the facility but do not form part of the facility.Sheet and coilSheet and coil is purchased from outside steel producers and processed and distributed by OneSteel orused in the manufacture of pipe and tube.SlabSlab is a section of cast steel usually 250mm thick and between 600 and 1800mm wide and 12 metres long.Steel & Tube NZSteel & Tube Holdings Limited and/or its subsidiaries, as the context admits.Structural steelLarge steel sections used for frames for buildings, factories, bridges and other infrastructure.Tex ReportA daily newspaper published in Japan that reports news on trade in steel products, coal and coke, ironore, pig iron and ferrous scrap and ferro-alloys.WPG ResourcesWPG Resources Limited and/or its subsidiaries, as the context admits.127
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2About OneSteel6Chairman’s Review
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OneSteel Annual Report 20114,000200
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Managing Director’s ReviewCommitm
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Operational Overview1143%of onestee
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Review of Operations$1,507 MILLIONR
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Review of Operations$296 MILLIONNEW
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SustainabilityCustomersWe are commi
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SustainabilityCommunity investment
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OneSteel Annual Report 2011Finance
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OneSteel Annual Report 201146Extern
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