YS/T 951-2014 PDF English
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| YS/T 951-2014 | English | 160 |
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Laterite nickel ores - Determination of moisture content of a consignment
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YS/T 951-2014: Laterite nickel ores - Determination of moisture content of a consignment---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/YST951-2014
NON-FERROUS METAL INDUSTRY STANDARD
ICS 77.120.01
D 42
Laterite nickel ores - Determination of moisture
content of a consignment
Issued on. OCTOBER 14, 2014
Implemented on. APRIL 01, 2015
Issued by. Ministry of Industry and Information Technology of the
People's Republic of China
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Terms and definitions... 4
4 Method summary... 5
5 Instruments and equipment... 5
6 Sample... 6
7 Determination steps... 6
8 Result calculation and expression... 7
9 Test report... 9
Annex A (normative) Determination of moisture content of over-wet or sticky
laterite nickel ore consignment... 11
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard shall be under the jurisdiction of National Technical Committee
on Non-ferrous Metals of Standardization Administration of China (SAC/TC243).
Main drafting organization of this Standard. Bayuquan Entry-Exit Inspection and
Quarantine Bureau of the People's Republic of China, China Inspection and
Certification Group Liaoning Co., Ltd., China Nonferrous Metals Industry
Standard Metrology and Quality Research Institute.
The drafting organization of this Standard. Shenyang Entry-Exit Inspection and
Quarantine Bureau of the People's Republic of China, Ningbo Entry-Exit
Inspection and Quarantine Bureau of the People's Republic of China, Tianjin
Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China,
Nantong Entry-Exit Inspection and Quarantine Bureau of the People's Republic
of China, Changshu Entry-Exit Inspection and Quarantine Bureau of the
People's Republic of China.
Main drafters of this Standard. Jiang Xiaoguang, Song Chenggang, Zhao
Junfeng, Chu Ning, Jiang Li, Li Weigang, Zhu Xiaoyan, Guo Chengwei, Pan
Hongwei, Zhang Xiaodong, Xu Yuyu, Cao Guozhou, Zhang Yanfu, Wang
Yanjun, Chen Yu.
Laterite nickel ores - Determination of moisture
content of a consignment
1 Scope
This Standard specifies the determination method of moisture content of a
consignment of laterite nickel ores.
This Standard is applicable to the determination of moisture content of a
consignment of laterite nickel ores.
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 of the referenced document (including any
amendments) applies.
YS/T 950, Methods for sampling and sample preparation of laterite nickel
ores in bulk
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 consignment
A certain amount of ores in one delivery. A consignment may consist of a batch,
several batches or partial batches of ores.
3.2 gross sample
A sample that consists of all increments and fully represents all quality
characteristics of a batch.
3.3 partial sample
A sample that is composed of partial increments required to form a gross
sample.
3.4 increment
A certain amount of ores that are obtained in one operation by a sampling
device or a sample reduction device.
3.5 sample
Relatively small amount of ores that are representative and are taken from a
batch of ores of which their quality characteristics are to be evaluated.
4 Method summary
In 105°C±5°C air flow, dry the test portion to constant weight. By determining
the mass loss of test portion, calculate its moisture content.
5 Instruments and equipment
5.1 Drying pan. stainless-steel or enamel; about 1000g of test portion are
placed in the pan and the thickness is about 10mm.
5.2 Blast dryer. equipped with temperature indicator and controller; be able to
control the temperature of any point in the cabinet within 105°C±5°C; the air in
the cabinet can conduct cycling and replacement, so as to make test portion
completely dried without any loss.
6 Sample
Use the moisture sample that is taken according to the provisions of YS/T 950
and the prepared granularity is not greater than 10.0mm.
7 Determination steps
7.1 Determination times
According to the preparation method of test portion, based on the number of
test portions specified in Table 1, measure the moisture once for each test
portion.
7.2 Measurement
After obtaining the moisture sample, according to the number of test portions
specified in Table 1, in the dry drying pan (5.1) with a known mass, weigh 1000g
of test portion as soon as possible, to the nearest of 0.1g.
8 Result calculation and expression
8.1 Test portion
The determination result of moisture content of each test portion wi, expressed
in mass fraction, is calculated according to formula (1). Keep the result to two
digits after the decimal place.
8.2 Consignment
9 Test report
The test report shall at least contain the following information.
Annex A
(normative)
Determination of moisture content of over-wet or sticky laterite nickel
ore consignment
A.1 When the moisture sample is too wet or sticky to sieve, break and divide, it
shall pre-dry the moisture sample till it is easy to prepare.
NOTE. It shall carefully distribute the pre-dried test portion, weigh the initial mass of test
portion and the mass of pre-dried test portion, so as to ensure the determination precision
of pre-dried moisture content.
A.2 Weigh the initial mass of test portion.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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