SN 0066-1992Methods for sampling and sample preparation of chrome ores in bulk for import (English PDF)

Foreword

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

This standard replaces SN 0066-1992 "chrome ore imports bulk sampling and sample preparation method." this standard compared with SN 0066-1992, the main changes are as follows.

--- Increasing the preface;

--- In Chapter 1, increasing the clause "This standard specifies the bulk import chrome ore sampling and sample preparation method";

--- In Chapter 2, delete the original text of the standard "2 reference standard", add "2 Normative references";

--- "2 Normative references", delete obsolete standard "GB 2007.5-87", to increase the standard "GB/T 2007.4-2008 Bulk minerals sampling and sample preparation General bias, precision Experimental methods for checking "" SN/T 2726 Inspection minerals terminology ";

--- Added "3 Terms and Definitions";

--- The standard "coefficient of variation" are replaced by "relative standard deviation";

--- Standard in many "80 mesh" are changed to "180µm";

--- The "5.2 sampling tool" in the drawings in Appendix A to move;

--- The "6.1 sample preparation tool" in Appendix B to move to the drawings;

--- The original 6.2 to 6.6 standard texts made editorial modifications;

--- Original standard "Appendix A reference piece" Delete;

--- Delete annotated, the annotated contents described in the "foreword" in.

This standard is proposed and managed by the National Certification and Accreditation Administration Committee.

This standard was drafted. People's Republic of China Liaoning Province Exit Inspection and Quarantine.

1 Scope

This standard specifies the bulk import chrome ore sampling and sample preparation methods.

This standard applies to bulk import chrome ore (lump ore, fine ore and concentrates) chemical composition, moisture, particle size and other physical items like measuring Chemicals and preparation.

2 Normative references

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

GB/T 2007.1-1987 bulk minerals sampling and sample preparation General manual sampling methods GB/T 2007.2 bulk minerals sampling and sample preparation General manual sample preparation method GB/T 2007.3 minerals in bulk sampling, test methods for sample preparation quality fluctuation General Evaluation GB/T 2007.4 bulk minerals for sampling and sample bias General, Experimental methods for checking the precision GB/T 2007.6 bulk minerals sampling and sample preparation General Determination of Water - heat drying method GB/T 2007.7 bulk minerals sampling and sample preparation method for determination of size by General manual sieving SN/T 2726 Test Mineral Terminology

3 Terms and Definitions

SN/T 2726 defined by the following terms and definitions apply to this document.

Batch lot

Processing or production of a certain amount of material under the same conditions.

Consignment One delivery of a certain amount of ore. Consignment may be batch, lot or batch number portion of ore composition.

Batch batch

Constitute a group or a delivery material mass batches.

Basic batch baciabatch the minimum number of quality goods.

Increments and increment amount portionandportionamount Samples from a number of materials in a point or a prescribed part of the quality of the extracted sample parts, each kind of quality parts called parts of the sample volume.

Part number of samples portionnumber by a group of materials should take a minimum number of parts, the number of increments.