GB/T 20475.5-2020Classification for content of harmful elements in coal—Part 5: Fluorine (English PDF)

Foreword

GB/T 20475 "Classification of Hazardous Elements in Coal" is divided into 5 parts.

---Part 1: Phosphorus;

---Part 2: Chlorine;

---Part 3: Arsenic;

---Part 4: Mercury;

---Part 5: Fluorine.

This part is Part 5 of GB/T 20475.

This section was drafted in accordance with the rules given in GB/T 1.1-2009.

1 Scope

This part of GB/T 20475 specifies the classification, naming and code of coal according to the dry base fluorine content w (Fd) range, and the mining of coal samples. Take, prepare and measure.

This part is applicable to coal exploration, production and processing, sales and utilization.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document. For undated references, the latest version (including all amendments) applies to this document.

GB/T 474 Coal sample preparation method

GB/T 475 Commercial coal sample manual sampling method

GB/T 482 Coal Seam Coal Sample Collection Method

GB/T 4633 Method for determination of fluorine in coal

GB/T 19494.1 Mechanized coal sampling Part 1: Sampling method

GB/T 19494.2 Coal mechanized sampling Part 2: Coal sample preparation

MT/T 1034 Method of producing coal samples

3 Classification, naming and code of fluorine content in coal

See Table 1 for the classification, naming and code of fluorine content in coal.

4 Collection, preparation and determination of coal samples

4.1 Coal samples are taken in accordance with the regulations of GB/T 475, GB/T 482, GB/T 19494.1, and MT/T 1034.

4.2 Coal sample preparation shall be carried out in accordance with the regulations of GB/T 474 and GB/T 19494.2.

4.3 The determination of fluorine content in coal shall be carried out in accordance with the regulations of GB/T 4633.