GB/T 14261-2010Methods for sampling and sample preparation of flotation zinc concentrates in bulk (English PDF)

Foreword

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

This standard is GB/T 14261-1993 "flotation zinc concentrates in bulk sampling and sample preparation method" as amended. And GB/T 14261-1993 Compared to the standard main changes are as follows.

--- The inspection volume, type and quality variation sampling, sample preparation and measurement precision of the total, respectively, has been modified;

--- Increasing the sampling precision;

--- The system is divided into quality sampling system sampling time and sampling systems, and make provisions, respectively;

--- Van sampling method increases the sampling test batch increase and car delivery time;

--- Increasing the sampling methods bagged concentrate;

--- Moisture measurement, the accuracy of the balance has been modified; make it clear that the time for drying the water sample.

1 Scope

This standard specifies the sampling and sample preparation procedures and methods for measuring the moisture content of bulk flotation of zinc concentrate.

This standard applies to bulk flotation of zinc concentrate chemical composition, moisture and other physical item detection sample taken with the preparation and moisture Determination.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this document. For undated references, the latest edition (including any amendments) applies to this document.

GB/T 8170-2008 revised value represents about rules and limit values and judgment

GB/T 14260-2010 heavy nonferrous metals flotation concentrates in bulk sampling and sample preparation General

3 Terms and Definitions

This standard adopts GB/T 14260 terminology and definitions.

4 Requirements

4.1 Sampling, sample preparation and total precision measurement (betaSPM) and sampling precision (betaS), shown in Table 1.

The first method specified in 4.2 sampling method is no system error method.

4.3 special cases, test batches agreed by both parties.

To 4.4 percent zinc content as quality characteristics of zinc concentrate.

4.5 according to the method for sampling and sample preparation, and, if required for checking the precision test.

4.6 As a result of constraints, may be appropriate to change the sampling method, but it must be no significant difference after checking test confirmed before use.

4.7 If the delivery of quality ore is uneven or mixed foreign inclusions, negotiated by both parties.

4.8 composition sample should be kept for three months (International Trade custody for six months), to prepare for verification.

4.9 Water samples should be placed in a dry, clean, closed containers to prevent moisture changes.