Document Details |
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| Name of Department/Committee : | MTD 13 |
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| Document Number : | MTD 13 ( 23619) |
| Document Title [English] : | Iron ores for blast furnace feedstocks Determination of the decrepitation index |
| Document Title [Hindi] : | ब्लास्ट फर्नेस फीडस्टॉक के लिए लौह अयस्क - क्षय सूचकांक का निर्धारण |
| Document Type : | New |
| Language : | English |
| Priority : | 3 |
| ICS Code : | 73.060.10 |
| Date of Project Approval : | 11-09-2023 |
| Standards to be Superseded : | |
Classification Details |
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| Group : | Metals, Alloys and Metal Products (including Steel Products) |
| Sub Group : | Heat treatment, metallography and testing |
| Sub Sub Group : | Methods of mechanical testing of metals |
| Aspects : | Methods of tests |
| Risk : | Low |
| Certification : | None |
| Short Commom Man's Title : | |
| ITCHS Code : | |
| Ministry : |
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| Sustainable development Goals : | |
| Degree of Equivalence : | Identical under dual numbering |
| Identical/Equivalent Standards : | ISO/DIS 8371 : Iron Ores for Blast Furnace Feedstocks — Determination of the Decrepitation Index |
| Organization Type: | ISO |
| Sl.No. | Synosis Points | |
| 1 | The Decrepitation Index (DI), the parameter used to describe the extent of decrepitation, is described as the ratio of the mass of particles <6 mm after pre-heating to the total mass of the sample. As the cold burden lands on the top of the hot burden in the furnace and descends, it is subject to thermal shock, which may also cause breakdown of the lump particles. To assess this behaviour of lump ore, the decrepitation index (DI) is usually measured in accordance with ISO 8371. The decrepitation index quantifies the resistance of lump ore to thermal degradation. A high decrepitation index results in more iron loss through dust generation and has a negative impact on blast furnace permeability. | |
Timeline Details |
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Stages |
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| Sl. No. |
Stage | Date of Occurence | Remarks | Circulated to | Files |
| 1 | Generation of Document Number | 11-09-2023 | ------- | ||
| 2 | P-Draft Waived | 21-09-2023 | As the standard is ISO adoption . | ------- | |
| 3 | P-Draft Waived | 21-09-2023 | ISO adoption | ------- | |
| 4 | WC Draft | 21-09-2023 | Duration : 30 Days Submitted for HOD approval |
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| 5 | WC Draft | 22-09-2023 | WC approved by HOD |
MTDC MTD 13, | ------- |