GB/T 32551-2016 in English
VALIDFluorspar powder in bulk―Determination of transportable moisture limits―Flow-table method
- Issued on:2016-02-24
- Implemented on:2017-01-01
- File Format:PDF
- Delivery:Within 1 day
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《GB/T 32551-2016散装萤石粉 适运水分限量的测定 流盘实验法》由TC183（全国钢标准化技术委员会）归口，TC183SC17（全国钢标准化技术委员会冶金非金属矿产品分会）执行，主管部门为中国钢铁工业协会。
Introduction
1. Standard background and scope of application
GB/T32551-2016 "Flow plate test method for determination of transportable moisture limit of bulk fluorite powder" is the first standard formulated in my country for the transportation safety of bulk fluorite powder. It aims to determine its transportable moisture limit (TML) through flow plate test to ensure the safety of goods in non-special vessel transportation.
2. Comparison of standard frameworks
| Standard dimensions | GB/T32551-2016 | International similar standards |
|---|---|---|
| Scope of application | Bulk fluorite powder with a maximum particle size of ≤1mm, and the proportion of fine particles ≥80% | Similar to bulk cargo transportation standards, but not specifically for a single ore type |
| Determination method | Flow plate test method | Shaking table test, ring test method, etc. |
| Technical indicators | Flow Moisture Point (FMP) and its 90% safety factor Transportable Moisture Limit (TML) | TML is generally determined by direct application of FMP or addition method |
3. Practical Application Scenarios and Case Studies
Background:With the increase in the export volume of fluorite powder in my country, problems such as fluidization of cargo and affected ship stability due to excessive moisture content in bulk transportation have become increasingly prominent. Such risks can be effectively prevented through the implementation of standards.
Case 1:When a trader exported a batch of fluorite powder, he did not determine the transportable moisture limit according to the standard. As a result, due to bad weather during sea transportation, the cargo fluidized, causing the ship to tilt. Upon investigation, the moisture content of the batch of cargo far exceeded the TML value.
Case 2:Another trader strictly measured and controlled the moisture content in accordance with the GB/T32551-2016 standard. No safety accidents occurred during transportation, which demonstrated the effectiveness and necessity of the standard.
4. Implementation suggestions
- Strict sampling and sample preparation:Ensure the representativeness of the samples to avoid deviations in the measurement results due to uneven sampling.
- Equipment calibration:Regularly verify and calibrate key instruments such as flow pans, balances, and ovens to ensure the accuracy of experimental data.
- Staff training:Strengthen the understanding of the standards and the study of operating specifications, especially the judgment of fluidization phenomena and emergency response measures.
- Establish a traceability system:It is recommended that companies establish a complete test record and result tracking system to quickly trace the source when problems arise.
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