GB/T 21836-2024
Trimanganese tetroxide (English Version)
- Standard No.
- GB/T 21836-2024
- Language
- Chinese, Available in English version
- Release Date
- 2024
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Latest
- GB/T 21836-2024
- Replace
- GB/T 21836-2008
- Introduction
1. Overview of the national standard for manganese tetraoxide
GB/T 21836-2024 "Manganese tetraoxide" standard was released in 2024, replacing the previous GB/T 21836-2008. The new standard has been comprehensively revised in terms of scope, classification code, technical requirements, etc., and is applicable to manganese tetraoxide produced by the metal manganese method and other processes.
2. Comparison of standard frameworks
Standard content GB/T 21836—2008 GB/T 21836—2024 Scope Only applicable to products produced by the metal manganese method Covering products produced by multiple processes such as the metal manganese method and the manganese sulfate method Classification code Undefined classification system Two new categories, DCM and DZM, are added to refine the classification of grades Chemical composition requirements A wide range of manganese content Newly added doping element indicators and limits 3. Detailed explanation of technical requirements
Appearance quality: The product should have uniform color, without lumps and inclusions.
Chemical composition and physical performance indicators
Item Mass fraction/% Manganese (Mn) DCM-1：70.0 DCM-2：69.0 DCM-3：65.0 DZM-1：71.0 DZM-2：70.0 DZM-3：70.0 4. Inspection methods and quality control
The standard stipulates the ammonium ferrous sulfate titration method and inductively coupled plasma atomic emission spectrometry for manganese content. Inspection items include chemical composition analysis, physical property testing and moisture determination.
Implementation suggestions
Production link:Enterprises should establish a complete quality management system and strictly control raw material procurement and production processes in accordance with standard requirements.
Inspection link:The laboratory must be equipped with advanced spectrometers and other equipment, and operated by professionals to ensure data accuracy.
Packaging and storage:It is recommended to use moisture-proof packaging and store in a cool and dry environment to prevent the product from being affected by moisture and affecting performance.
GB/T 21836-2024 Referenced Document
- GB/T 13390 Metallic powder.Determination of the specific surface area.Method of nitrogen adsorption
- GB/T 1479.1 Metallic powders—Determination of apparent density—Part 1:Funnal method
- GB/T 5314 Powders for powder metallurgical purposes.Sampling
- GB/T 5686.7 Ferromanganese，ferromanganese-silicon，nitrogen-bearing ferromanganese and manganese metal—Determination of sulfur content—Infrared absorption method and combustion-neutralization method
- GB/T 6284 Chemical products for industrial use General method for determination of water content The loss mass on drying method
- GB/T 9729 Chemical reagent.General method for the determination of chloride
GB/T 21836-2024 history
- 2024 GB/T 21836-2024 Trimanganese tetroxide
- 2008 GB/T 21836-2008 Manganous manganic oxide for soft magnetic ferrites
