GB/T 14263-2010 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 14263-2010 | English | 85 |
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Methods for sampling and sample preparation of flotation copper concentrates in bulk
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| GB/T 14263-1993 | English | 479 |
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Methods for sampling and sample preperation of flotation copper conentrates in bulk
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GB/T 14263-2010: Methods for sampling and sample preparation of flotation copper concentrates in bulk
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT14263-2010
D 42
NATIONAL STANDARD
OF THE PEOPLE'S REPUBLIC OF CHINA
Replace GB/T 14263-1993
Methods for Sampling and Sample
Preparation of Flotation Copper
Concentrates in Bulk
Issued on: DECEMBER 23, 2010
Implemented on: SEPTEMBER 01, 2011
Jointly Issued by the General Administration of Quality Supervision,
Inspection and Quarantine of the People's Republic of
China and the Standardization Administration of the
People's Republic of China
GB
Table of Contents
Foreword... I
1 Scope...1
2 Normative References... 1
3 Terms and Definitions...1
4 Requirements... 1
5 Sampling... 2
6 Sample Preparation...7
7 Moisture Determination...12
IForeword
This standard is drafted in compliance with the rules in GB/T 1.1-2009.
This standard replaces GB/T 14263-1993 "Methods for Sampling and Sample
Preparation of Flotation Copper Concentrates in Bulk". Compared with GB/T 14263-1993,
this standard has the following main changes.
——The content of total precision of sampling, sample preparation and determination in
the standard is modified greatly;
——The basic lot is modified;
——The systematic sampling method is divided into mass systematic sampling method
and time systematic sampling method, and respective provisions are made for them;
——The ground sampling method is added in the truck sampling method;
——The bagged sampling method is added;
——The sample preparation flow chart is modified, the interfusion method in sample
preparation is added, and the sample flow chart which is also used for sample preparation in
the former standard is deleted;
——"Sieving" in sample preparation is modified to "free pass a standard sieve";
——The precision of the electronic balance used in moisture determination is modified
to with a sensibility not less than 0.01g;
——The requirements for the specification of drying tray for moisture determination are
specified;
——Rules of rounding off for numerical values for moisture determination are added.
This standard is proposed by China Nonferrous Metals Industry Association.
This standard is under the jurisdiction of the National Technical Committee on
Nonferrous Metals of Standardization Administration of China (SAC/TC 243).
Drafting organizations of this standard. Daye Nonferrous Metals Co., Ltd., China
Institute of Weights and Measures Quality of Nonferrous Metal Industry.
Participating drafting organizations of this standard. Tongling Nonferrous Metals Group
Holding Co., Ltd., Jiangxi Copper Corporation, CHALCO Yunnan Copper Co., Ltd. Branch,
Jinchuan Group Co., Ltd., Yanggu Xiangguang Copper Co., Ltd., Nantong Entry-Exit
Inspection and Quarantine Bureau.
Chief drafting staff of this standard. Cheng Xi, Liu Zhengming, Hu Xinping, Zhao
Junfeng, Zhang Zelin, Hong Xiongwen, Long Yuzhen, Bu Shaotian, Yi Aihong, Wu Zhiqing,
Zhang Fazhi, Hou Jin, Chen Yingwu.
The previous edition of the standards replaced by this standard is as.
——GB/T 14263-1993.
1NATIONAL STANDARD
OF THE PEOPLE'S REPUBLIC OF CHINA
Methods for Sampling and Sample Preparation of
Flotation Copper Concentrates in Bulk
1 Scope
This standard specifies the procedure and method for sampling, sample preparation and
moisture determination of flotation copper concentrates in bulk.
This standard is applicable to the taking, preparation and moisture determination of the
samples used for chemical composition and moisture determination as well as other physical
item inspection of flotation copper concentrates in bulk.
2 Normative References
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references, the
latest edition (including any amendments) of the normative document is applicable to this
standard.
GB/T 8170 "Rules of Rounding Off for Numerical Values & Expression and Judgement
of Limiting Values"
GB/T 14260-2010 "General Rules for Sampling and Sample Preparation of Heavy
Nonferrous Metals Flotation Concentrates in Bulk"
3 Terms and Definitions
For the purposes of this standard, the terms and definitions in GB/T 14260 apply.
4 Requirements
5300g.
5.4.2 For the sampling with sampling drill rod, the increment sample quantity is
approximately 400g.
5.4.3 The taken increment sample quantity shall be basically consistent, and the mass
variation coefficient shall not be greater than 20%.
5.5 Sampling methods
5.5.1 Systematic sampling method
The systematic sampling method is divided into mass systematic sampling and time
systematic sampling. It is to take the increment sample according to certain mass or time
interval during the unloading or metering movement process of a lot of concentrates.
The sampling interval of the mass systematic sampling shall be calculated according to
Formula (1), and reserved the integer part if any decimals.
NT 11 (1)
Where,
T1——the sampling mass interval, t;
N1——the inspection lot, t;
n——the increment sample number specified in the standard.
The sampling interval of the time systematic sampling shall be calculated according to
Formula (2), and reserved the integer part if any decimals.
nG
NT
60 (2)
Where,
T2——the sampling interval, min;
N1——the inspection lot, t;
n——the increment sample number specified in the standard;
G——the handling quantity per hour, t/h.
The first increment sample of systematic sampling method may be randomly sampled
within the first interval, instead of the start point of the first interval. Then the increment
sample shall be taken according to the calculated interval. If the increment sample number to
be taken has been taken completely according to the fixed interval, but the concentrate
handling is still in progress, the sampling shall be continued according to the specified
interval until the whole lot of concentrates is handled completely.
For sampling on a conveying belt or at the outlet, the total section of the concentrate
flow shall be intercepted. For sampling during the handling and stacking process of such tools
as grab bucket and forklift, the sampling shall be carried out on the new exposed concentrate
surface during the handling or stacking process or in the handling tool. The sampling points
shall be uniformly distributed at each position of the whole lot of concentrates.
5.5.2 Stratified sampling method
For the sampling that a lot of concentrates is divide into several layers (at least three
layers) during the handling process, the sampling shall be carried out by uniformly
distributing points on the new exposed surface in proportion according to the mass of each
6layer. The increment sample number to be taken for each layer shall be calculated according
to Formula (3), and rounded off to the integer if any decimals.
1N
Nnn ii
(3)
Where,
ni——the increment sample number to be taken for each layer;
n——the increment sample number specified in the standard;
Ni——the mass of each layer, t;
N1——the inspection lot, t.
5.5.3 Truck sampling method
Where a lot of concentrates is delivered by train or automobile, uniformly distribute
points in the carriage, take off the surface layer, use a sampling drill rod to vertically insert
into the bottom from the new exposed surface, and take the increment sample after rotation.
Avoid taking from the surface layer or some local position. This method may not be adopted
until it is proved that there is no error after checking according to Appendix C of GB/T 14260.
For train delivery, the routine sampling may comply with the increment sample number
specified in this standard according to the inspection lot. Where an inspection lot is composed
of multiple trucks, the increment sample number to be taken from each truck shall be
calculated according to Formula (4), and rounded off to the integer if any decimals.
nn 2 (4)
Where,
n2——the increment sample number to be taken from each vehicle;
n——the increment sample number specified in the standard;
M——the total vehicle number of inspection lot.
Note. Where the loading masses of the trucks are different, the distribution of the increment sample number shall be
proportional to the loading capacity.
For automobile delivery, if the inspection lot is less than the basic lot, the increment
sample number to be taken shall be calculated according to Formula (5) (rounded off to the
integer if any decimals); if the inspection lot is not less than the basic lot, sampling may be
carried out according to the increment sample number specified in this series standard.
Nnn 11 (5)
Where,
n1——the minimum increment sample number to be taken by automobile;
n——the minimum increment sample number specified in the standard;
N1——the inspection lot, t;
N——the basic lot, t.
Where an inspection lot is composed of multiple automobiles, the increment sample
number to be taken by each automobile shall be calculated by reference to Formula (4), and
rounded off to the integer if any decimals.
For automobile ground sampling...
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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