GB/T 32832-2025Bauxite-based synthetic homogenized grogs (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.

This document replaces GB/T 32832-2016 "Alumina-based refractory homogeneous materials". Compared with GB/T 32832-2016, except for the structural adjustment and in addition to editorial changes, the main technical changes are as follows:

a) The definition of alumina-based refractory homogeneous material has been changed (see 3.1, 3.1 of the 2016 edition);

b) Added the grades of alumina-based refractory homogeneous materials FNJ-90 and FNJ-83, and adjusted the grades of FNJ-70, FNJ-60 and FNJ-50 to FNJ-70A, FNJ-70B, FNJ-60A, FNJ-60B, FNJ-50A, FNJ-50B (see Chapter 4, Chapter 4 of the 2016 edition);

c) The physical and chemical indicators of alumina-based refractory homogeneous materials have been changed (see Table 1, Table 1 of the 2016 edition);

d) Added requirements for other physical properties (see 5.2);

e) The corresponding test methods have been changed (see Chapter 6, Chapter 6 of the 2016 edition);

f) The contents of packaging, labeling, transportation, storage and quality certificate have been changed (see Chapter 8, Chapter 8 of the 2016 edition).

1 Scope

This document specifies the grades, technical requirements, test methods, inspection rules, packaging, marking, transportation, storage and certificate of quality.

This document applies to alumina-based refractory homogeneous materials.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document.

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to this document.

GB/T 2007.7 General rules for sampling and sample preparation of bulk mineral products - Particle size determination method - Manual sieving method

GB/T 2999 Test method for bulk density of refractory particles

GB/T 6900 Chemical analysis methods for aluminum-silicon refractories

GB/T 15545 General provisions for packaging, marking, transportation, storage and quality certification of monolithic refractory materials

GB/T 17617 Rules for Sampling and Inspection of Refractory Raw Materials

GB/T 18930 Terminology of Refractory Materials

GB/T 21114 X-ray fluorescence spectrochemical analysis of refractory materials - Fused glass disc method

JB/T 6570 Determination of magnetic content in common abrasives

YB/T 5142 Packaging, marking, transportation, storage and quality certification of metallurgical mineral products

3 Terms and Definitions

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

4 Brand

According to the chemical composition of alumina, bauxite-based refractory homogeneous materials are divided into eleven grades, namely FNJ-90, FNJ-88, FNJ-85, FNJ-83, FNJ-80, FNJ-70A, FNJ-70B, FNJ-60A, FNJ-60B, FNJ-50A, FNJ-50B. The "F", "N" and "J" in the brand name respectively stand for "bauxite".

The first Chinese characters of "base", "refractory" and "homogeneous material" are the pinyin initials. The numbers are the mass fractions of aluminum oxide. A and B are the grades. Differences in iron content.