GB/T 24530-2009Iron ores for blast furnace feedstocks -- Determination of reduction under load (English PDF)

Foreword

This standard is equivalent to international standards ISO 7992:2007 "blast furnace with a load of iron ore reduction Determination" (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;

--- Modify the references to 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 is an informative annex.

The standard proposed by China Iron and Steel Association.

This standard by the National Standardization Technical Committee of the reduced iron ore and direct.

1 Scope

This standard specifies the test methods to determine the physical stability of the reduction of iron ore during the reduction with blast furnace gas flow through simulation.

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 10322.1 iron ore sampling and sample preparation method (GB/T 10322.1-2000, idtISO 3082.1998) 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 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 Determination of acid-soluble iron content of iron ore ISO 9035 titration

3 Terms and Definitions

The standards adopted GB/T 20565 in the terms and definitions.

Principle 4

At 1050 °C, the sample while applying the static load of the bed, which leads to carbon monoxide, hydrogen and nitrogen gas mixture of test samples Reduction until the reduction reaches 80%.

When the test sample reduction of 80%, the measurement sample and the sample gas pressure bed bed height variation.

5 Sampling, sample preparation and test sample preparation