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GB/T 24235-2009 English PDF

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GB/T 24235-2009: Iron ores for shaft direct-reduction feedstocks -- Determination of the low temperature reduction-disintegration index and degree of metallization
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GB/T 24235-2009English174 Add to Cart 3 days [Need to translate] Iron ores for shaft direct-reduction feedstocks -- Determination of the low temperature reduction-disintegration index and degree of metallization Valid GB/T 24235-2009

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Basic data

Standard ID GB/T 24235-2009 (GB/T24235-2009)
Description (Translated English) Iron ores for shaft direct-reduction feedstocks -- Determination of the low temperature reduction-disintegration index and degree of metallization
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard D31
Classification of International Standard 73.060.10
Word Count Estimation 9,942
Date of Issue 2009-07-15
Date of Implementation 2010-04-01
Adopted Standard ISO 11257-2007, 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 test methods for identification of pellets and lump ore powder rate and metallization rate.

GB/T 24235-2009: Iron ores for shaft direct-reduction feedstocks -- Determination of the low temperature reduction-disintegration index and degree of metallization


---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Iron ores for shaft direct-reduction feedstocks.Determination of the low temperature reduction-disintegration index and degree of metallization ICS 73.060.10 D31 National Standards of People's Republic of China GB/T 24235-2009/ISO 11257..2007 Direct reduction furnace charge with iron ore low temperature reduction pulverization rate And the metallization rate of the measured gas direct reduction method (ISO 11257..2007, IDT) 2009-07-15 released 2010-04-01 Implementation General Administration of Quality Supervision, Inspection and Quarantine of the People 's Republic of China China National Standardization Management Committee released

Foreword

This standard is equivalent to the use of international standards ISO 11257..2007 "direct reduction furnace charge iron ore low temperature reduction rate of powder and metallization Of the direct reduction of the measured gas method "(English version). For ease of use, this standard has the following editorial and non-technical differences. --- "this international standard" to "this standard"; --- replace the comma as a decimal point with a decimal point. " - to remove the preamble of international standards; --- reference documents to the corresponding national standards. Appendix A of this standard is a normative appendix. This standard is proposed by China Iron and Steel Industry Association. This standard by the national iron ore and direct reduction of iron standardization technical committee. This standard is responsible for drafting units. Baoshan Iron & Steel Co., Ltd. This standard participates in the drafting unit. Metallurgical Industry Information Standards Institute. The main drafters of this standard. Yu Chengfeng, Li Yuguang, Wang Han, Xu Hongwei, Zhou Xing, Tu Shu Lin, Chen Zibin. GB/T 24235-2009/ISO 11257..2007 Direct reduction furnace charge with iron ore low temperature reduction pulverization rate And the metallization rate of the measured gas direct reduction method WARNING - Personnel using this standard should have practical experience in formal laboratory work. This standard does not indicate all possible security questions question. It is the responsibility of the user to take appropriate safety and health measures and to ensure compliance with the conditions set forth in the relevant national regulations.

1 Scope

This standard specifies the test of the pulverization and metallization rates of pellets and lumps under conditions similar to the direct reduction of gases method.

2 normative reference documents

The terms of the following documents are hereby incorporated by reference into this standard. Whichever is the date of the reference file, which is followed by all (Excluding corrigenda) or revisions do not apply to this standard, however, encourage the parties to reach an agreement under this standard Whether you can use the latest version of these files. For undated references, the latest edition applies to this standard. GB/T 6003.1 Wire Mesh Test Screen (GB/T 6003.1-1997, eqv ISO 3310-1..1990) GB/T 6003.2 metal perforated plate test sieve (GB/T 6003.2-1997, eqv ISO 3310-2..1990) GB/T 6730.5 Determination of iron content of iron ore Titanium trichloride reduction method (GB/T 6730.5-2007, ISO 9507. 1990, MOD) GB/T 6730.6 Methods for chemical analysis of iron ores - Determination of iron content by ferric chloride - sodium acetate volumetric method Methods for chemical analysis of iron ores - The sulfosalicylic acid photometric method for the determination of metallic iron content GB/T 6730.7 GB/T 10122 Sampling and sample preparation of physical test specimens for iron ore (sinter, pellet) GB/T 10322.1 Method for sampling and sampling iron ores (GB/T 10322.1-2000, idt ISO 3082..1998) GB/T 10322.7 Determination of particle size distribution of iron ore (GB/T 10322.7-2004, idt ISO 4701..1999) GB/T 20565 Iron Ore and Direct Reduction Iron Terminology (GB/T 20565-2006, ISO 11323..2002, IDT) ISO 9686 Direct reduction of iron and/or sulfur content - Determination of high - frequency combustion infrared absorption method

3 principle

A reducing gas consisting of hydrogen, carbon monoxide, carbon dioxide and methane was used at a temperature of 760 ° C for a test sample in a rotary tube For 300min isothermal reduction. Heat the test sample in an inert gas. Screening with a 3.15 mm square hole test screen. use Less than 3.15 mm of the weight of the particles calculated by the percentage of the reduction of the rate of reduction. The chemical analysis of the reduced material is carried out to calculate the gold Localization rate. 4 Preparation of samples, samples and test samples 4.1 Sampling and preparation of samples Sampling and sample preparation should be carried out according to GB/T 10322.1. Pellet grain size composition. 10.0mm ~ 12.5mm 50%, 12.5mm ~ 16.0mm 50%. The particle size of the lump ore composition. 10.0mm ~ 16.0mm 50%, 16.0mm ~ 20.0mm 50%. At least 2.0 kg of dry basis screening samples. Before preparing the test sample, the sample should be dried to constant weight at a temperature of 105 ° C ± 5 ° C and cooled to room temperature. Note. When the two consecutive weighing sample quality difference does not exceed the initial mass of 0.05% of the sample that is constant weight. GB/T 24235-2009/ISO 11257..2007

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