GB/T 42345-2023 (English Version)

Standard No.: GB/T 42345-2023
Language: Chinese, Available in English version
Release Date: 2023
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 42345-2023

Scope: This document specifies the general requirements, sample collection and preparation, instrument preparation and parameter setting, mineral content determination, data processing, etc. of the automatic analysis system for vanadium-titanium magnetite mineral parameters. This document is applicable to the quantitative detection of vanadium-titanium magnetite mineral components using the automatic analysis system for mineral parameters.

Introduction

Interpretation of the standard for quantitative detection methods of vanadium-titanium magnetite minerals

1. Background and significance of the standard

GB/T 42345-2023 "Quantitative Detection Methods of Vanadium-Titanium Magnetite Minerals" is managed by the National Technical Committee for Standardization of Comprehensive Utilization of Vanadium-Titanium Magnetite, aiming to standardize the use of automatic mineral parameter analysis systems for quantitative detection of vanadium-titanium magnetite. This standard was proposed by the China Iron and Steel Association and jointly drafted by a number of authoritative research institutions.

As an important strategic resource, vanadium-titanium magnetite is widely used in metallurgy, chemical industry and other fields. With the advancement of technology, traditional manual detection methods have gradually been replaced by efficient and accurate automatic analysis systems. The formulation of this standard fills the gap in this field in China and provides a basis for scientific management and quality control.

2. Comparison of standard frameworks

Standard dimensions	GB/T 42345—2023	International reference standards
Scope of application	Quantitative detection of mineral components of vanadium-titanium magnetite	ISO/International general rock and mineral analysis methods
Core content	Sample collection and preparation, instrument parameter setting, data processing	Equipment calibration, data analysis process
Technical requirements	Scanning electron microscope and energy spectrometer parameter optimization	Automated analysis system integration

3. Interpretation of key technologies

3.1 Sample preparation process

According to the standard requirements, sample collection and preparation are divided into two types: block and powder. For powder samples, the reduction method is used for collection and the reduction method is used for processing. The preparation process includes the production of sanding sheets and sand flakes to ensure that the mineral particles are evenly distributed without threshing, bubbles and other problems.

Case Study: Key Points for Sanding Sheet Preparation

Samples need to be ground into sanding sheets and sand thin sheets
Sanding sheets are used for subsequent sample preparation, and sand thin sheets are used for SEM analysis
The thickness of the observation surface should not exceed 5mm

4. Implementation Suggestions

4.1 Equipment Configuration Suggestions

The laboratory needs to be equipped with a scanning electron microscope (SEM) and an energy dispersive spectrometer (EDS), and install automatic quantitative analysis software for mineral parameters. The selection of the accelerating voltage should be adjusted according to the sample particle size, usually 20kV, and if the particle size is less than 38μm, it should be reduced to 15kV.

4.2 Data Calibration Recommendations

Perform micro-area quantitative analysis of samples using electron probe microanalysis (EPMA) regularly to ensure the accuracy of the database. Select at least 10 measurement points for each test and compare with the results of the automatic analysis system.

4.3 Personnel Training Requirements

Operators must have laboratory work experience and receive professional training, with a focus on equipment operation, data processing and quality control. Pay special attention to the identification and calibration methods of complex minerals.

GB/T 42345-2023 history

2023 GB/T 42345-2023 Quantitative detection method of vanadium-titanium magnetite minerals