GB/T 2988-2023High alumina bricks (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.

This document replaces GB/T 2988-2012 "High Alumina Bricks". Compared with GB/T 2988-2012, except for structural adjustments and editorial changes In addition, the main technical changes are as follows.

a) Delete the grades of ordinary high alumina bricks LZ-75G and LZ-55G (see Table 1 of the 2012 version);

b) Added indicators such as low creep high alumina bricks Fe2O3, TiO2 and thermal shock resistance (see Table 2);

c) Added low creep high alumina brick DRL-145K brand (see Table 2);

d) Changed some indicators of low creep high alumina bricks (see Table 2, 2012 version of Table 2).

1 Scope

This document stipulates the classification, brand, shape and size, technical requirements, test methods, quality assessment procedures, packaging, marking, and transportation of high alumina bricks. transport, storage and quality certificates.

This document is applicable to ordinary high alumina bricks and low creep high alumina bricks used in high temperature kilns.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.

GB/T 2992.1 Shape and dimensions of refractory bricks Part 1: General bricks

GB/T 2997 Test method for volume density, apparent porosity and true porosity of dense shaped refractory products

GB/T 5072 Test method for compressive strength at room temperature of refractory materials

GB/T 5073 Compressive creep test method for refractory materials

GB/T 5988 Test method for permanent linear change of refractory materials when heated

GB/T 6900 Chemical analysis method for aluminum-silicon refractory materials

GB/T 7321 Preparation method for specimens of shaped refractory products

GB/T 10325 Sampling inspection rules for acceptance of shaped refractory products

GB/T 10326 Inspection methods for size, appearance and cross-section of shaped refractory products

GB/T 16546 General provisions for packaging, marking, transportation, storage and quality certificates of shaped refractory materials

GB/T 18930 Refractory terminology

GB/T 20511 Classification rules for refractory products

GB/T 21114 Cast glass sheet method for X-ray fluorescence spectrochemical analysis of refractory materials

GB/T 30873-2014 Test method for thermal shock resistance of refractory materials

YB/T 370 Test method for softening temperature under load of refractory materials (non-differential-heating method)

3 Terms and definitions

The terms and definitions defined in GB/T 18930 and the following apply to this document.