GB/T 14201-2018Iron ore pellets for blast furnace and direct reduction feedstocks -- Determination of the crushing strength (English PDF)

Foreword

This Standard was drafted as per the rules specified in GB/T 1.1-2009.

This Standard replaced GB/T 14201-1993 Ore Pellets - Determination of Crushing

Strength. Compared with GB/T 14201-1993, this Standard has the major technical

changes as follows besides the editorial modifications:

--- Add "Warning" and "7 Confirmation of Equipment";

--- Add "load drops to 50% of the recorded maximum load value, or appear load

higher than the recorded maximum value" in the test end conditions of "analysis

procedures";

--- Add "when the crushing strength of individual pellets is lower than 10daN, it shall

be excluded when calculating the final result" in the "analysis procedures";

--- Modify the content of information that "test report" shall include.

This Standard uses redrafting method to modify and adopt ISO 4700:2015 Iron Ore

Pellets for Blast Furnace and Direct Reduction Feedstocks - Determination of the

Crushing Strength.

Compared with ISO 4700:2015, this Standard has the structural adjustments as follows:

--- Adjust the Clause 10 of ISO 4700:2015 into Clause 7 of this Standard;

--- Adjust the Clause 7 of ISO 4700:2015 into Clause 8 of this Standard;

--- Adjust the Clause 8 of ISO 4700:2015 into Clause 9 of this Standard;

--- Adjust the Clause 9 of ISO 4700:2015 into Clause 10 of this Standard.

The technical differences and the causes between this Standard and ISO 4700:2015

are as follows:

--- With regard to Normative References, this Standard has adjusted the technical

differences to meet the technical conditions of China. The adjustments are

reflected in Clause 2 "Normative References". The specific adjustments are as

follows:

* Replace ISO 3082 by GB/T 10322.1 that equivalently adopts international

standards;

* Replaced ISO 11323 by GB/T 20565 that equivalently adopts international

standards.

Iron Ore Pellets for Blast Furnace and Direct

Reduction Feedstocks - Determination of the

Crushing Strength

Warning: Personnel using this standard shall have practical experience working

in formal laboratory. This standard does not point out all possible safety issues.

It is the user's responsibility to take appropriate safety and health measures and

to ensure compliance with the conditions prescribed by the relevant national

regulations.

1 Scope

This Standard specifies the method for determining the crushing strength of iron ore

pellets for blast furnace and direct reduction feedstocks.

This Standard is applicable to iron ore pellets for blast furnaces and direct reduction

feedstocks.

2 Normative References

The following documents are essential to the application of this document. For the

dated documents, only the versions with the dates indicated are applicable to this

document; for the undated documents, only the latest version (including all the

amendments) are applicable to this document.

GB/T 10322.1 Iron Ores - Sampling and Sample Preparation Procedures (GB/T

10322.1-2014, ISO 3082:2019, IDT)

GB/T 20565 Iron Ores and Direct Reduced Iron - Vocabulary (GB/T 20565-2006,

ISO 11323:2002, IDT)

3 Terms and Definitions

For the purpose of this document, the terms and definitions given in GB/T 20565 apply.

6 Test Equipment

7 Confirmation of Equipment

In order to ensure the reliability of the test results, it is necessary to regularly check

and confirm the equipment. The frequency of inspection is determined by each

laboratory.

The inspection items shall include:

--- Pressure plate;

--- Load device;

--- Load transmission system;

--- Load indicator;

--- Recorder.

It is recommended to prepare internal reference materials for periodic inspection of

test repeatability.

Records of the above verification activities shall be kept.

8 Analysis Procedures