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GB/T 15057.1-1994Limestone for chemical industry--Methods of sampling and preparing (English PDF)

化工用石灰石采样与样品制备方法

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Issued by

State Bureau of Technical Supervision

Level / Type

National · Recommended

Issue date

May 5, 1994

Implementation date

February 1, 1995

Scope

GB/T 15057.1-1994 is the English-translated version of 化工用石灰石采样与样品制备方法.

GB/T 15057.1-1994 is the Chinese national standard on limestone for chemical industry--methods of sampling and preparing, in the field of mining and minerals. The /T suffix marks it as a recommended standard: it is not compulsory by itself, but it becomes binding as soon as a contract, a tender or a customer specification calls it up - which in practice is how most foreign buyers meet it. It was issued on 5 May 1994 by the State Bureau of Technical Supervision, and has been in force since 1 February 1995. Classification: ICS 73.080, CCS D51. This page is published from the official record of the standard held by the Chinese standards administration: the identification, the dates, the classification and the issuing body are taken from there. The clause text, the tables and the numeric limits are in the document itself, which is delivered complete in English translation.

Document preview — GB/T 15057.1-1994

National Standard of the People's Republic of China

ICS: 73.080
Classification: D51

Issued by: State Bureau of Technical Supervision

2 Normative References
3 Sampling Method 3.1 Sampling of mine pile
6 Table of Contents

Foreword

NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA UDC 549.51:661:543.06 D 51

GB/T 15057.1~15057.11-94

Chemical Analysis of Limestone for Chemical Industry

2 Normative References

GB/T 4650 Chemical products for industrial use - Sampling - Vocabulary

GB/T 6678 General Principles for Sampling Chemical Products

3 Sampling Method 3.1 Sampling of mine pile

The sampling point shall be no less than 0.3m from the top and from the bottom, and no less than 0.2m from the surface. The sample quantity at each point collected in the same batch shall be similar.

3.1.1 Ore of less than 1000t The sampling amount shall be no less than 2/100,000. The row spacing and point spacing shall be no greater than 2.5m, which shall be evenly distributed on the surface of the ore pile. Sample shall be taken at the intersection of row spacing and point spacing.

3.1.2 Ore of greater than 1000t The sampling amount shall be no less than 1/100,000. The row spacing and point spacing shall be no greater than 3.5m; and shall be evenly distributed on the surface of the ore pile. Sample shall be taken at the intersection of the row spacing and the point spacing.

6 The sampling amount shall be no less than 2/100,000. The row spacing and point spacing shall be no greater than 1.5m, and shall be evenly distributed on the surface of the ore in the cabin. Sample shall be taken at the intersection of the row spacing and the point spacing.

3.3.2 Ship of greater than 1000t The sampling amount shall be no less than 1/100,000. The row spacing and point spacing shall be no greater than 2.0m, and shall be evenly distributed on the surface of the ore in the cabin. Sample shall be taken at the intersection of the row spacing and the point spacing.

3.4 Belt conveyor sampling Sample quantity taken from the same batch shall be similar.

3.4.1 Sampling is conducted once every hour; and the sampling amount is 2/100,000 of the throughput of the belt conveyor per hour.

3.4.2 The sampling position can be carried out at any section of the belt conveyor. Each time, 3-point samples are continuously and randomly taken from the cross-section of the belt conveyor.

3.4.3 For ores with a transportation volume of less than 4 h, the number of sampling times from the cross-section of the belt conveyor shall be no less than 6 times; and for ores with a transportation volume of less than 2 h, the number of sampling times shall be no less than 4 times.

4 Preparation of Sample 4.1 Mixing each sample in a batch constitutes the sample of that batch.

4.2 The mixed sample needs to undergo procedures such as smashing, crushing, and grinding. Each procedure shall be screened. Mix well and divide into quarters. Each reduction shall be carried out as follows: Where: Q - the minimum reliable mass of the reduced sample, in kg, d - maximum diameter of sample particles, in mm, K - uniformity coefficient of ore, limestone is 0.1.

--- The End - - -

6 Table of Contents

1 Theme Content and Scope ................................................................................ 3

2 Normative References ...................................................................................... 3

3 Sampling Method ............................................................................................ 3

4 Preparation of Sample ......................................................................................

Limestone for Chemical Industry - Methods of Sampling and Preparing 1 Subject Content and Scope

This Standard specifies the sampling and sample preparation methods for limestone used in chemical industry. This Standard applies to the collection and preparation of limestone analysis specimens for chemical industry.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 8 pages — is available in the English PDF.

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Editions of GB/T 15057.1

Edition	Title	Revision	Status
GB/T 15057.1-1994	Limestone for chemical industry--Methods of sampling and preparing	current edition	Current

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