BS-5663-3-1993 ISO-8263-1992.pdf

BRITISH STANDARD BS 5663-3: 1993 ISO 8263:1992 Methods of testing iron ores Part 3: Iron ore fines Method for presentation of the results of sintering tests UDC 553.31:536.421.5 Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 15:55:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5663-3:1993 This British Standard, having been prepared under the direction of the Iron and Steel Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 October 1993 © BSI 09-1999 The following BSI references relate to the work on this standard: Committee reference ISM/58 Draft for comment 90/39159 DC ISBN 0 580 22283 7 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Iron and Steel Standards Policy Committee (ISM/-) to Technical Committee ISM/58, upon which the following bodies were represented: British Steel Industry Institution of Mining and Metallurgy Coopted members Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 15:55:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5663-3:1993 © BSI 09-1999i Contents Page Committees responsibleInside front cover National forewordii Introduction1 1Scope1 2Definitions1 3Sintering tests2 4Method for reporting results3 Annex A (normative) International Standards specifying the relevant test methods13 Figure 1 Example of sintering test equipment11 Figure 2 Flowsheet of typical sinter test procedure12 Table 1 Chemical analyses (dry basis), moisture content and size distributions of the various ores included in the ore mix4 Table 2 Composition of the ore mix5 Table 3 Chemical analyses (dry basis), moisture content and size distributions of fluxes, fuels and return sintered fines6 Table 4 Composition of the sinter mix7 Table 5 Sintering test results8 Table 6 Sinter product quality data10 List of referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 15:55:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5663-3:1993 ii © BSI 09-1999 National foreword This Part of BS 5663 has been prepared under the direction of the Iron and Steel Standards Policy Committee. It is identical with ISO 8263:1992 Iron ore fines Method for presentation of the results of sintering tests, published by the International Organization for Standardization (ISO). The Technical Committee has reviewed the provisions of ISO 4696 and ISO 7215, to which normative reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references International StandardCorresponding British Standard ISO 3271:1985BS 6212:1987 Method for determination of tumbler strength of iron ores (Identical) ISO 4695:1984BS 6598:1985 Method for determination of reducibility of iron ores (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 14, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 15:55:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5663-3:1993 © BSI 09-19991 Introduction Sintering tests can be conducted for several different purposes, for example, the assessment of the sintering behaviour of a particular iron ore fines, for production and quality control purposes at a sinter plant, or for research purposes concerned with the sintering process or sintering technology. From the results of these sintering tests, the sintering behaviour of an iron ore, or iron ore mix, is determined in terms of production rate, fuel consumption rate and sinter quality. The purpose of this International Standard is to establish the terminology and method for presentation of these results, for use when sintering test data is required to be exchanged between separate parties, such as will be the case where a particular iron ore fines has been assessed for commercial reasons, or where research or production results are to be published. 1 Scope This International Standard specifies a method for presentation of the results of sintering tests. It is applicable to all iron ore fines that are agglomerated by the sintering process. 2 Definitions For the purposes of this International Standard, the following definitions apply. 2.1 ore mix the blend of iron ores, and other iron bearing raw materials, such as mill scale, basic oxygen steel making slag, dust, etc., used in the tests. It does not include return sintered fines, fluxes, coke or other solid fuel 2.2 sinter mix the mix of materials charged to the sintering test apparatus, which includes the ore mix, fluxes, coke or other fuel, and return sintered fines 2.3 mixing times the time, in minutes, taken for blending and granulating the various constituents of the sinter mix 2.4 moisture content of sinter mix the moisture content, as a percentage by mass, determined by drying the granulated sinter mix, as charged to the sintering test apparatus, at 105 °C ± 5 °C 2.5 moisture content for maximum permeability the moisture content of the granulated sinter mix at which maximum permeability is obtained 2.6 bulk density of sinter mix the mass per unit volume of the wet sinter mix as charged 2.7 hearth layer a layer of previously made and sized sinter, or other iron ore material, which is placed on the grate before the sinter mix is charged 2.8 grate area the area of the grate of the sintering test apparatus 2.9 net bed height the height of the bed of sinter mix above the hearth layer, prior to the application of suction and ignition 2.10 suction the air suction measured at the wind box or at the entrance of the main blower of the sintering test apparatus 2.11 ignition intensity the heat supplied per unit of grate area per unit time of ignition 2.12 ignition temperature the maximum temperature attained at or immediately above the surface of the sinter bed during the ignition process 2.13 sintering time the time from the start of ignition until the exhaust gas temperature reaches a maximum 2.14 sinter cake the total mass of sinter produced, including the hearth layer and the material collected from the bottom of the wind box 2.15 sinter handling treatment the tumbling and/or shatter treatment given to the sinter cake, obtained in a sinter pot to simulate the effects of handling and transportation in a sinter plant Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 15:55:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5663-3:1993 2 © BSI 09-1999 2.16 return sintered fines the undersize fines separated from the sinter cake by sieving after the handling treatment 2.17 sinter product the sinter acceptable size for charging to the blast furnace 2.18 productivity the mass of sinter product, produced per unit grate area per unit of time (see 3.1.1) 2.19 fuel consumption the dry mass(es) of solid fuel(s) consumed per unit mass of sinter product after deducting the hearth layer (see 3.1.2) 2.20 yield the proportion (percentage) of sinter product in relation to the sinter cake, excluding the hearth layer (see 3.1.3) 2.21 return sintered fines balance the ratio of the mass of return sintered fines charged to the mass of undersize sintered fines produced (see 3.1.4) 3 Sintering tests For reference, an example of sintering test equipment is illustrated in Figure 1, while Figure 2 gives a flow-sheet of a typical sinter test procedure. The International Standards covering test methods for determining the chemical analyses, sieving analyses, and sinter quality indices are listed in Annex A. If any of these International Standards are not available, the respective national or regional standard should be used. 3.1 Calculation of results 3.1.1 Productivity The productivity P, in tonnes of sinter per square metre per hour, is calculated from the equation where NOTE 1Productivity may also be reported in terms of tonnes of iron contained in sinter of acceptable size per square metre per hour, to reflect changes in the grade of the sinter product. The productivity PFe, in tonnes of iron in sinter per square metre per hour, is calculated from the equation where wFe is the percentage iron content in the sinter. 3.1.2 Fuel consumption The fuel consumption C is calculated from the equation where 3.1.3 Yield The yield Y, as a percentage by mass, is calculated from the equation m1is the total mass, in kilograms, of sinter of acceptable size produced (including the hearth layer); m2is the mass, in kilograms, of the hearth layer; Ais the area of grate, in square metres; tis the sintering time, in minutes. m1is the total mass, in kilograms, of sinter of acceptable size produced (including the hearth layer); m2is the mass, in kilograms, of the hearth layer; m3is the dry mass of solid fuel in the sinter mix consumed. Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 15:55:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5663-3:1993 © BSI 09-19993 where 3.1.4 Return sintered fines balance The return sintered fines balance B is calculated from the equation where NOTE 2In a sinter pot test, this is normally maintained within limits of 1 ± 0,05, for results to be representative of actual practice. The percentage of return sintered fines F may also be recorded, and is calculated from the equation 4 Method for reporting results The results of sintering tests shall be reported according to schedules 1 to 6 as follows. Schedule 1: Chemical analyses (dry basis) and size distribution of the various ores included in the ore mix. Table 1 lists the chemical analysis and size distribution of each iron ore contained in the ore mix used in the tests. A separate column is used for each ore, or iron bearing material, included in the ore mix. It is not necessary to actually name each ore source which can be referred to as ore A, B, C, etc. Schedule 2: Composition of the ore mix. Table 2 shows the percentage of each iron ore, or iron bearing material, contained in the ore mix for each test. These percentages are calculated on a dry basis. Schedule 3: Chemical analyses (dry basis) and size distributions of fluxes, fuels and return sintered fines. Table 3 is similar to Table 1, but lists the chemical analyses and size distributions of all the other materials included in the sinter mix, such as the coke or alternative fuels used, each of the fluxes used, and the return sintered fines. The coke or fuel analyses give the percentage of ash as well as fixed carbon and volatile matter. If a hearth layer other than sized sinter is utilized, then the type and composition of the material used should be listed in Table 3. Schedule 4: Composition of the sinter mix. Table 4 shows the percentage of each constituent of the sinter mix, including the ore mix, fluxes, coke or other fuel, and the return sintered fines. NOTE 3From Table 1 and Table 2, the overall weighted composition of the ore mix can be calculated and used as the basis for calculation of flux quantities. Schedule 5: Sintering test results. Table 5 gives the conditions under which the sintering tests were done and the results of the tests. Schedule 6: Sinter product quality data. In Table 6 the results of chemical and physical tests undertaken on the sinter product are recorded. m1is the total mass, in kilograms, of sinter of acceptable size produced; m2is the mass, in kilograms, of the hearth layer; m4is the total mass, in kilograms, of sinter cake. m5is the mass of return sintered fines charged (input); m6is the mass of undersize sintered fines produced (output). Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 15:55:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5663-3:1993 4 © BSI 09-1999 Table 1 Chemical analyses (dry basis), moisture content and size distributions of the various ores included in the ore mix Ore AOre BOre COre D Mill scale and/or other surface coatings Test ore % Chemical analysis Fe (total) FeO SiO2 Al2O3 CaO MgO MnO S P Na2O K2O C TiO2 Loss on ignition Combined water Moisture content Size distribution + 8,0 mm 8,0 mm + 5,6 mm 5,6 mm + 4,0 mm 4,0 mm + 2,0 mm 2,0 mm + 1,0 mm 1,0 mm + 500 4m 500 4m + 250 4m 250 4m + 125 4m 125 4m + 63 4m 63 4m Method of size analysis wet/dry sieving Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 15:55:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5663-3:1993 © BSI 09-19995 Table 2 Composition of the ore mix Values in percentage by mass % (m/m) (dry basis) Constituents of ore mix Test No. 1 Test No. 2 Test No. 3 Test No. 4 Test No. 5 Test No. 6 Ore A Ore B Ore C Ore D Mill scale and/or other surface coatings Test ore Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 15:55:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5663-3:1993 6 © BSI 09-1999 Table 3 Chemical analyses (dry basis), moisture content and size distributions of fluxes, fuels and return sintered fines Coke or other fuel FluxReturn sintered finesLimestoneDolomiteSiliceousOther % Chemical analysis Fe (total) FeO SiO2 Al2O3 CaO MgO MnO S P Na2O K2O C TiO2 C (fixed) Ash Volatile Matter (VM) Combined water Moisture content Size distribution + 8,0 mm 8,0 mm + 5,6 mm 5,6 mm + 4,0 mm 4,0 mm + 2,0 mm 2,0 mm + 1,0 mm 1,0 mm + 500 4m 500 4m + 250 4m 250 4m + 125 4m 125 4m + 63 4m 63 4m Method of size analysis: wet/dry sieving Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 15:55:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5663-3:1993 © BSI 09-19997 Table 4 Composition of the sinter mix Values in percentage by mass % (m/m) (dry basis) Constituents of sinter feed Test No. 1 Test No. 2 Test No. 3 Test No. 4 Test No. 5 Ore mix Return sintered fines Siliceous material Limestone Dolomite Other fluxes (if any) Coke Other fuel (if any) Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 15:55:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5663-3:1993 8 © BSI 09-1999 Table 5 Sintering test results Item Test No. 1 Test No. 2 Test No. 3 Test No. 4 Test No. 5 Sinter mix Mass of hearth layer m2 (kg) Size range of hearth layer material (mm) Mass of sinter mix charged wet (kg) Moisture content of feed (%) Moisture content for maximum permeability (%) Bulk density of wet sinter mix (t/m3) Conditions of sinter test Mixing time: 1st stage (min) 2nd stage (min) Grate area (m2) Height of hearth layer (mm) Net bed height (mm) Suction: at ignition (kPa) sinter bed (kPa) cooling bed (kPa) Type of ignition fuel Ignition intensity (MJ/m2/min) Ignition temperature (°C) Ignition time (min) Cooled: in sinter pot discharged h