GB/T 6645-2008 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 6645-2008 | English | 90 |
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Granulated Electric Furnace Phosphorous Slag Used for Cement
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| GB/T 6645-1986 | English | 399 |
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Granulated electric furnace phosphorous slag used for cement production
| Obsolete |
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GB/T 6645-2008: Granulated Electric Furnace Phosphorous Slag Used for Cement---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/GBT6645-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 91.100.10
Q 12
Replacing GB/T 6645-1986
Granulated Electric Furnace
Phosphorous Slag Used for Cement
Issued on. JUNE 30, 2008
Implemented on. APRIL 1, 2009
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration 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 Technical Requirements... 5
5 Test Methods... 5
6 Inspection Rules... 6
7 Transportation and Storage... 7
8 Requirements of Usage... 7
Appendix A (Normative) Determination Method of Bulk Weight of Granulated
Electric Furnace Phosphorous Slag... 8
Foreword
This Standard replaces GB/T 6645-1986 Granulated Electric Furnace Phosphorous
Slag Used for Cement Production.
In comparison with GB/T 6645-1986, this Standard has the following main changes.
---NOTE is added to the definition of granulated electric furnace phosphorous slag
(Chapter 2 in Version 1986; Chapter 3 in this version);
---Radioactive indexes and corresponding inspection methods of phosphorous
slag are added (4.6 in this version; 5.7 in this version);
---Inspection rules specifically stipulate the determination rules of exit-factory
inspection and type inspection of phosphorous slag (Chapter 4 in Version 1986;
6.5 in this version);
---Appendix A in the previous standard is modified into determination method of
bulk weight of granulated electric furnace phosphorous slag; Appendix B in the
previous standard is deleted.
Appendix A in this Standard is normative.
This Standard was proposed by China Building Materials Federation.
This Standard shall be under the jurisdiction of National Technical Committee on
Cements of Standardization Administration of China (SAC/TC 184).
The responsible drafting organization of this Standard. China Building Materials
Academy.
The participating drafting organizations of this Standard. Yunnan Building Material
Research & Design Institute, Yunnan Ruian Building Material Investment Co., Ltd.
The main drafters of this Standard. Yan Bilan, Wangxin, Wang Meiyi, Wu Xiujun, Jiang
Lizhen, Liuchen, Li Changhua, Ma Dongmei.
This Standard was issued for the first time in 1986.This is the first amendment.
Granulated Electric Furnace
Phosphorous Slag Used for Cement
1 Scope
This Standard specifies the terms, definitions, technical requirements, test methods
and inspection rules of granulated electric furnace phosphorous slag used for cement.
This Standard is applicable to granulated electric furnace phosphorous slag used for
cement mixture.
2 Normative References
Through the quotation in this Standard, clauses in the following documents become
clauses in this Standard. In terms of references with a specific date, all the subsequent
modification sheets (excluding corrected content) or revised versions are not
applicable to this Standard. However, all parties that reach an agreement in
accordance with this Standard are encouraged to explore the possibility of adopting
the latest versions of these documents. In terms of references without a specific date,
the latest versions are applicable to this Standard.
GB 175 Common Portland Cement
GB/T 6003.2 Test Sieves of Perforated Metal Plate
3 Terms and Definitions
The following terms and definitions are applicable to this Standard.
Granulated Electric Furnace Phosphorous Slag
When electric furnace method is adopted to prepare yellow phosphorus, molten
material, whose primary element is calcium silicate, is obtained. Through quenching
granulation, it becomes granulated electric furnace phosphorous slag (phosphorous
slag, for short).
4 Technical Requirements
4.1 Mass coefficient K of raw phosphorous slag shall be not less than 1.1.
4.2 In phosphorous slag, mass fraction of phosphorous pentoxide shall be not more
than 3.5%.
4.5 Any foreign substances, for example, phosphorus mud, shall not be mixed into it.
4.6 Conduct the inspection in accordance with 5.6, the radioactivity of phosphorous
slag shall satisfy relevant requirements in GB 6566.
5 Test Methods
5.1 Calcium Oxide, Magnesium Oxide, Silicon Dioxide, Aluminum oxide,
Fluorine Content and Phosphorus Pentoxide Content
Conduct the test in accordance with the method in JC/T 1088.
5.2 Mass Fraction K
Mass fraction of raw phosphorus slag shall be calculated in accordance with Formula
(1). The calculation result shall retain two decimal places.
5.4 Granule Content over 10 mm
Use 10 mm circular sieve, whose aperture satisfies the requirement in GB/T 6003.2 to
test granule content. Dry phosphorous slag at (105 ± 5) °C to constant weight, then,
weigh-take 2 kg of phosphorous slag sample, place it in the sieve. Manually vibrate it,
till there is no apparent sample passing through, then, weigh the residue on the sieve.
Mass fraction of granule over 10 mm shall be calculated in accordance with Formula
(2). The calculation result shall retain to integer.
5.6 Radioactivity
Grind phosphorous slag powder into refined powder whose granule size shall be less
than 0.16 mm.
6 Inspection Rules
6.1 Sampling Method
Phosphorous slag, which is discharged every half a month, shall be deemed as one
batch here. Sample can be taken continuously; or an equivalent amount of sample can
be taken from over 20 different parts and the total amount of the sample shall be at
least 20 kg. After thoroughly mixing the sample, use quartering method to quarter the
sample to 5 kg for tests. During sampling, eliminate 150 mm ~ 200 mm surface layer.
6.3 Type Inspection
Under one of the following circumstances, type inspection shall be conducted in
accordance with all the requirements in Chapter 4.
6.4 Determination Rules
7 Transportation and Storage
In bulk transportation, phosphorus slag shall not be mixed with other materials. Wagon
or compartment must be cleaned up, so as to avoid the mixture with foreign substances.
In terms of storage, foreign substances shall not be mixed with phosphorus slag.
8 Requirements of Usage
When a cement enterprise starts using phosphorous slag provided by the supply side,
it shall conduct acceptance inspection in accordance with all the requirements in
Chapter 4.
Appendix A
(Normative)
Determination Method of Bulk Weight of Granulated Electric Furnace
Phosphorous Slag
A.1 Instruments
A.1.3 Steel ruler
The length of steel ruler shall be not less than 150 mm.
A.1.4 Platform scale
The division value of platform scale shall be not more than 10 g.
A.2.2 Test
In the test of bulk weight, place the bulk weight meter on a stable test table. Thoroughly
mix up the sample; block the lower mouth of the funnel. Pour the phosphorous slag
sample into the funnel. Open the feed opening, so that phosphorous slag can naturally
fall into the bulk weight cylinder. After the cylinder is filled with phosphorous slag, use
a steel ruler to scrape redundant phosphorous slag; weigh the mass of the bulk weight
cylinder, which is filled with phosphorous slag.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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