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GB/T 24236-2009: Iron ores for shaft direct-reduction feedstocks -- Determination of the reducibility index, final degree of reduction and degree of metallization
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| GB/T 24236-2009 | English | 254 |
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Iron ores for shaft direct-reduction feedstocks -- Determination of the reducibility index, final degree of reduction and degree of metallization
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GB/T 24236-2009
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Basic data | Standard ID | GB/T 24236-2009 (GB/T24236-2009) | | Description (Translated English) | Iron ores for shaft direct-reduction feedstocks -- Determination of the reducibility index, final degree of reduction and degree of metallization | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | D31 | | Classification of International Standard | 73.060.10 | | Word Count Estimation | 13,162 | | Date of Issue | 2009-07-15 | | Date of Implementation | 2010-04-01 | | Adopted Standard | ISO 11258-2007, IDT | | Regulation (derived from) | National Standard Approval Announcement 2009 No.9 (Total No.149) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the gas directly under reducing conditions, by measuring the reduction index, eventually restored and metal test methods to evaluate the rate of removal of oxygen from iron ore in the degree of difficulty. This standard is suitable for lump ore and pellets. | GB/T 24236-2009: Iron ores for shaft direct-reduction feedstocks -- Determination of the reducibility index, final degree of reduction and degree of metallization
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Iron ores for shaft direct-reduction feedstocks. Determination of the reducibility index, final degree of reduction and degree of metallization
ICS 73.060.10
D31
National Standards of People's Republic of China
GB/T 24236-2009/ISO 11258.2007
Direct reduction furnace with iron ore reduction index,
Determination of the final degree of reduction and the rate of metal
(ISO 11258.2007, IDT)
Posted 2009-07-15
2010-04-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard is equivalent to international standards ISO 11258.2007 "direct reduction furnace reduction of iron ore index, final degree of reduction and metal
Determination of rates "(in English).
For ease of use, this standard has been modified following editorial and non-technical difference of.
--- "This International Standard" by "this standard";
"." --- With a decimal point instead of a comma as the decimal point, "";
--- Delete foreword international standards;
--- References modify the corresponding national standards;
--- Rearrange the picture number and location;
--- Chapter 10 trials reporting changes to Chapter 11, also made a non-technical content changes.
Appendix A of this standard is a normative appendix, Appendix B and Appendix C are informative appendices.
The standard proposed by China Iron and Steel Association.
This standard by the National Standardization Technical Committee of the reduced iron ore and direct.
This standard is drafted by. Baoshan Iron & Steel Co., Ltd.
Participated in the drafting of this standard. Metallurgical Industry Information Standards Institute.
The main drafters of this standard. Sun Liang, Wang Han, Li Fengyun, SOUTHERN, the Chen Hailan, Jihua Dong, Zhou Xing, to a peak.
GB/T 24236-2009/ISO 11258.2007
Direct reduction furnace with iron ore reduction index,
Determination of the final degree of reduction and the rate of metal
Warning --- personnel should use this standard practice regular laboratory work. This standard does not point out all possible security asked
question. Users have the responsibility to take appropriate safety and health practices and to ensure compliance with the conditions relevant national regulations.
1 Scope
This standard specifies the gas in the direct reduction conditions, by measuring the reduction index, final degree of reduction and the metallization rate to evaluate the oxygen from the iron ore
Test methods for stone removal degree of difficulty.
This standard is suitable for lump ore and pellets.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 6730.5 Determination of the amount of total iron ore titanium trichloride reduction method (GB/T 6730.5-2007, ISO 9507.1990,
MOD)
GB/T 10322.1 iron ore sampling and sample preparation method (GB/T 10322.1-2000, idtISO 3082.1998)
GB/T 20565 term iron ore and direct reduced iron (GB/T 20565-2006, ISO 11323.2002, IDT)
Determination of the amount of total iron ore ISO 2597-1 Part 1. stannous chloride reduction titration
ISO 5416 direct reduced iron - Determination of metallic iron content of bromine - methanol titration
Determination of acid-soluble iron content of iron ore ISO 9035 titration
Carbon and/or determination of ISO 9686 DRI sulfur content - High frequency combustion infrared absorption method
3 Terms and Definitions
The standards adopted GB/T 20565 in the terms and definitions.
Principle 4
The test sample after sample fixed bed at 800 ℃ access by hydrogen, carbon monoxide, carbon dioxide and nitrogen gas reduction
Test samples were heated reduction. 90min reduction in time, continuously or at intervals of time weighing the test sample. Oxygen ratio of iron
0.9 when calculating the degree of reduction, while the loss of oxygen by mass 90min after (R90) to calculate the final degree of reduction. By reduction of the sample after
Analysis or R90 formula to calculate the rate of metal.
5 sampling, sample preparation and test sample preparation
5.1 Sampling and sample preparation
Sampling and sample preparation according to GB/T 10322.1 performed.
Size pellets composed of. 10.0mm ~ 12.5mm accounted for 50%, 12.5mm ~ 16.0mm 50%.
Lump ore particle size composition. 10.0mm ~ 16.0mm accounted for 50%, 16.0mm ~ 20.0mm 50%.
Dried sample size composed of the above-mentioned at least 2.5kg.
Samples at 105 ℃ ± 5 ℃ oven drying to constant weight, and then cooled to room temperature.
Note. If two consecutive dry sample varies no more than 0.05% by mass of the original sample is considered state of the sample constant weight is reached.
GB/T 24236-2009/ISO 11258.2007
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