GB/T 1572-2018 in English

GB/T 1572-2018 Standard Overview

Standard Name:Determination Method of Slagging Property of Coal

Standard Number:GB/T 1572—2018, replacing GB/T 1572—2001

Scope of Application:Determination of slagging property of lignite, bituminous coal, anthracite and coke.

Standard Development Background and Technology Evolution Analysis

GB/T 1572—2018 standard was drafted based on the rules of GB/T 1.1—2009, and the main updates include:

• The term definitions "slagging property" and "slagging rate" were added.
• The periodic verification requirements for the constant temperature zone of the muffle furnace were strengthened.
• A new chapter "Test Report" has been added to ensure the integrity and standardization of test data.

Core Terms and Definitions

Slagging:The performance measurement of coal ash softening, melting and slagging during the gasification or combustion process, expressed as slagging rate.

Slagging rate:The mass percentage of slag pieces with a particle size greater than 6 mm in the slag after the sample is gasified and burned at the specified blast intensity.

Determination steps and methods

Instruments and operating specifications

The main instruments include:

• Slagging tester: includes key components such as flue gas chamber, gasification sleeve, and air chamber.
• Blower: air volume not less than 12 m³/h, air pressure not less than 49 hPa.
• Muffle furnace: has a constant temperature zone and can maintain the temperature at (350±10)°C.

Implementation suggestions and precautions

To ensure the accuracy of the test results, it is recommended to:

1. Regularly calibrate the instruments and equipment, especially the muffle furnace and flowmeter.
2. Prepare the samples strictly in accordance with the standard requirements, especially the coal samples with volatile coke slag characteristics greater than 3 need to be debonded.
3. During the measurement process, pay attention to observe and adjust the air flow in time to reach the specified value.