GB/T 29502-2021Purple ores (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 of Standardization Documents" drafted.

This document replaces GB/T 29502-2013 "pyrite slag", compared with GB/T 29502-2013, except for structural adjustment and editorial In addition to the changes, the main technical changes are as follows:

a) Changed the scope of products, and changed "applicable to the slag produced by high temperature roasting of pyrite, mainly used for the manufacture of iron pellets and iron making".

Changed to "applicable to pyrite (or pyrite concentrate, ferrous sulfate) iron-containing materials produced by boiling furnace roasting, used for raw materials in the iron and steel industry.

It can also be used as an iron correction material for cement production" (see Chapter 1, Chapter 1 of the:2013 edition);

b) Added normative references GB/T 6730.81 and GB/T 10322.1, deleted normative references GB/T 6730.9,

GB/T 2007.1, GB/T 2007.2, GB/T 2466, GB/T 2467 and GB/T 2468 (see Chapter 2,:2013 edition of chapter 2);

c) Added the terms and definitions of "pyrite slag" (see 3.1);

d) The technical indicators of the mass fraction of total iron and arsenic have been changed, and the mass fraction of total iron of the first-grade product is not less than 60.0% and the mass fraction is not less than 60.0%.

At 62.0%, change the mass fraction of the first-grade arsenic not more than 0.05% to a mass fraction of no more than 0.03%, and change the mass of the second-grade arsenic The score is not more than 0.08% and the quality score is not more than 0.07% (see 5.1, 3.2 of the:2013 edition);

e) The technical indicators of sulfur mass fraction have been changed, and the mass fraction of third-grade sulfur is not more than 2.5% to a mass fraction of not more than 2.0% (see 5.1, 3.2 of the:2013 edition);

f) Added the technical indicators of chromium and cadmium (see 5.1);

g) Added "the color of the same batch of products should be basically uniform, without lumps" (see 5.4);

h) Added the determination methods for arsenic, chromium and cadmium (see 6.1);

i) The inspection of appearance quality is added (see 6.4);

j) Changed the inspection and acceptance, and changed "each delivery batch shall be inspected by the supplier's quality inspection department" to "the product shall be inspected by the supplier or Inspection by a third-party inspection agency" (see 7.1, 5.1 of the:2013 edition);

k) Changed the inspection items, and changed "Moisture, total iron and sulfur are the ex-factory inspection items specified in this standard" to "Each batch of pyrite slag should be inspection of chemical composition, moisture, particle size and appearance quality"; deleted "under normal production conditions, at least once a month type inspection" (see 7.3, 5.3 of the:2013 edition);

l) Changed the implementation standard of sampling and sample preparation, changed GB/T 2007.1 and GB/T 2007.2 to GB/T 10322.1 (see GB/T 2007.1 and GB/T 2007.2). 7.4.1, 5.4.1, 5.4.2 of the:2013 edition);

m) The requirements for product storage have been changed, and "the storage site of the product should be a hard floor with anti-corrosion and anti-leakage, and there should be barriers around the site.

Water walls, drainage ditches and collection and sedimentation tanks" are changed to "Products should be stored in closed warehouses (or warehouses), and the storage warehouses (or warehouses) are required to be protected.

Take protective measures such as seepage, dust suppression, and wall skirt impermeability, avoid rain and dust, and implement accident risk prevention measures to prevent damage to groundwater, surface water, surrounding air, etc:" (see 8.2.3, 6.3.2 of the:2013 edition);

n) Added accompanying files (see 8.3).

1 Scope

This document specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage and accompanying of pyrite slag Contents of documents and orders.

This document is applicable to the iron-containing materials produced by the roasting and desulfurization of pyrite (or pyrite concentrate, ferrous sulfate) in a boiling furnace.

It can also be used as iron calibration material for cement production.

2 Normative references

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

GB/T 6730.10 Determination of silicon content in iron ore by gravimetric method

GB/T 6730.18 Determination of phosphorus content in iron ore molybdenum blue spectrophotometric method

GB/T 6730.36 Determination of copper content in iron ore by flame atomic absorption spectrometry

GB/T 6730.45 Determination of Arsenic Content in Iron Ore Separation of Arsenic Hydrogen - Arsenic Molybdenum Blue Spectrophotometry

GB/T 6730.53 Determination of zinc content in iron ore by flame atomic absorption spectrometry

GB/T 6730.54 Determination of lead content in iron ore by flame atomic absorption spectrometry

GB/T 6730.57 Determination of chromium content in iron ore by flame atomic absorption spectrometry

GB/T 6730.61 Determination of carbon and sulfur content in iron ore by high frequency combustion infrared absorption method

GB/T 6730.65 Determination of total iron content in iron ore Titanium trichloride reduction potassium dichromate titration method (conventional method)

GB/T 6730.81 Determination of various trace elements in iron ore by inductively coupled plasma mass spectrometry

GB/T 8170 Numerical Rounding Rules and Representation and Judgment of Limit Values

GB/T 10322.1 Iron ore sampling and sample preparation method

GB/T 10322.5 Determination of Moisture Content in Delivery Lot of Iron Ore

GB/T 10322.7 Sieving Determination of Particle Size Distribution of Iron Ore and Direct Reduced Iron

3 Terms and Definitions

The following terms and definitions apply to this document.

4 Product categories

According to the difference of the total iron content of the main component of the pyrite slag, it is divided into three grades, namely the first grade, the second grade and the third grade. END. Draft Version (GB/T 29502-2021)