YS/T 575.19-2021Methods for chemical analysis of bauxite - Part 19: Determination of loss on ignition - Gravimetric method (English PDF)
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Issued by
Ministry of Industry and Information Technology of the People’s Republic of China
Level / Type
National · Recommended
Issue date
March 5, 2021
Implementation date
July 1, 2021
Scope
YS/T 575.19-2021 (Methods for chemical analysis of bauxite - Part 19: Determination of loss on ignition - Gravimetric method) is available as an English-translated PDF.
YS/T 575.19-2021 — This Document specifies the method for determining the loss on ignition in bauxite ores. This Document is applicable to the determination of the loss on ignition in bauxite ores, with a determination range of 10.00% ~ 30.00%.
Other types of aluminosilicates such as clay and kaolin can be used for reference.
Found what you need?
Document preview — YS/T 575.19-2021
National Standard of the People's Republic of China
- ICS
- 71.040.40
Issued by: Ministry of Industry and Information Technology of the People’s Republic of China
Contents
- Foreword...3
- Introduction...6
- 1 Scope...7
- 2 Normative References...7
- 3 Terms and Definitions...7
- 4 Apparatus...8
- 5 Air Balance Wet Water Correction Method...8
- 6 Determination Method of Pre-Dried Specimen...10
- 7 Precision...11
- 8 Test Report...11
Foreword
This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for
Standardization – Part 1.Rules for the Structure and Drafting of Standardizing Documents.
This Document is Part 19 of YS/T 575 Methods for Chemical Analysis of Bauxite. YS/T 575
has published the following parts.
--- Part 1.Determination of aluminum oxide content EDTA titrimetric method;
--- Part 2.Determination of silicon dioxide content Gravimetric-molybdenum blue
photometric method;
--- Part 3.Determination of silicon dioxide content molybdenum blue photometric method;
--- Part 4.Determination of iron oxide content - Dichromate titrimetric method;
--- Part 5.Determination of iron oxide content - Orthophenanthroline photometric method;
--- Part 6.Determination of titanium dioxide content - Diantipyrylmethane photometric
method;
--- Part 7.Determination of calcium oxide content - Flame atomic absorption
spectrophotometric method;
--- Part 8.Determination of magnesium oxide content - Flame atomic absorption
spectrophotometric method;
--- Part 9.Determination of potassium oxide and sodium oxide content - Flame atomic
absorption spectrophotometric method;
--- Part 10.Determination of manganese oxide content - Flame atomic absorption
spectrophotometric method;
--- Part 11.Determination of chromium oxide content - Flame atomic absorption
spectrophotometric method;
--- Part 12.Determination of vanadium pentoxide content N-benzoyl-N-
phenylhydroxylamine photometric method;
--- Part 13.Determination of zinc content - Flame atomic absorption spectrophotometric
method;
--- Part 14.Determination the total content of rare earth oxide - Tribromo-arsenazo
photometric method;
--- Part 15.Determination of gallium oxide content - Rhodamine B-extraction photometric
method;
--- Part 16.Determination of phosphorus pentoxide content - Molybdenum blue
spectrophotometric method;
--- Part 17.Determination of sulfur content - Direct combustion-iodometric method;
--- Part 18.Determination of total carbon content - Non-aqueous titrimetric method after
combustion;
--- Part 19.Determination of loss on ignition - Gravimetric method
--- Part 20.Preparation of pre-dried sample;
--- Part 21.Determination of organic carbon content titrimetric method;
--- Part 22.Determination of hydroscopic moisture on gravimetric method;
--- Part 23.Determination of element contents X-ray fluorescence spectrometric method;
--- Part 24.Determination of carbon content and sulfur content - Infrared absorption method'
--- Part 25.Determination of sulfur content - Coulometric titration method.
Some contents of this Document may involve patents. The issuing agency of this Document
shall not assume the responsibility to identify these patents.
This Document replaced YS/T 575.19-2007 Methods for Chemical Analysis of Bauxite - Part
19 Determination of the Loss on Ignition - Gravimetric Method. Compared with YS/T 575.19-
2007, this Document has the major technical changes as follows besides the structural
adjustments and editorial modifications.
a) Modify the original standard to "air balance wet water correction method"; add "pre-dried
specimen determination method"; and adopt the arbitration method of "air balance wet
water correction method" (see Clauses 5 and 6 of this Edition; Clauses 6 and 7 of the
2007 Edition);
b) Modify the precision (see Clause 7 of this Edition; Clause 8 of the 2007 Edition);
c) Modify the test report (see Clause 8 of this Editon; Clause 9 of the 2007 Edition).
This Document was proposed by and under the jurisdiction of National Technical Committee
on Nonferrous Metals of Standardization Administration of China (SAC/TC 243).
Drafting organizations of this Document. Chalco Zhengzhou Nonferrous Metals Research
Institute Co., Ltd.; Shandong Nanshan Aluminum Co., Ltd.; Guangdong Academy of Sciences
Industrial Analysis and Testing Center; Chalco Mining Co., Ltd.; China Aluminum Shandong
Co., Ltd.; Kunming Metallurgical Research Institute Co., Ltd.; and Shenzhen Zhongjin Lingnan
Nonferrous Metals Co., Ltd. Shaoguan Smelter.
Chief drafting staffs of this Document. Bai Wanli, Ma Huixia, Song Lili, Liu Jing, Ma Yanhong,
Zhang Yingying, Peng Zhan, Huang Puying, Wang Fenghui, Tian Rui, Luo Shun, Feng
Jingdong, Wang Hengyu, Tang Qing, Liu Gangxiang, Nian Lina, Yan Yuxin, He Jianwen, and
Wang Lijuan.
The historical editions replaced by this Document are as follows.
--- YS/T 575.19-2006 was first-time published in 2006; first-time revised in 2007;
--- It is second-time revised hereby.
1 Scope
This Document specifies the method for determining the loss on ignition in bauxite ores.
This Document is applicable to the determination of the loss on ignition in bauxite ores, with a
determination range of 10.00% ~ 30.00%. Other types of aluminosilicates such as clay and
kaolin can be used for reference.
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in this Document. For the dated documents, only the versions with the dates
indicated are applicable to this Document; for the undated documents, only the latest version
(including all the amendments) is applicable to this Document.
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of
limiting values
YS/T 575.20 Methods for chemical analysis of bauxite - Part 20.Preparation of pre-dried
sample
YS/T 575.22 Methods for chemical analysis of bauxite - Part 22.Determination of
hydroscopic moisture - Gravimetric method
3 Terms and Definitions
For the purposes of this Document, there are no terms and definitions apply.
4 Apparatus
4.1 Plate. flat bottom, the plate bottom area shall be no greater than 100 cm2.
4.2 Crucible. platinum crucible or porcelain crucible, diameter is about 30 mm, height is about
45 mm. The porcelain crucible shall be burned in a high temperature furnace at 1075°C ± 25°C
for at least 3 h before the first use.
4.6 Analytical balance. the actual graduation value is 0.0001g.
4.7 Weighing bottle. with lid, large enough to hold the required specimen volume.
5 Air Balance Wet Water Correction Method
5.1 Principle
Weigh two specimens after air balance; one for air balance wet water content measurement, the
other for loss on ignition measurement; use air balance wet water content correction to calculate
loss on ignition.
5.3 Test procedures
5.3.1 Parallel test
Perform two parallel tests and take the average value.
5.3.2 Constant weight of crucible
5.3.3 Determination
5.3.3.1 Weigh 1.0g ± 0.1g of air balance specimen (5.2) into a constant weight crucible (5.3.2);
and record the weighed mass of the air balance specimen (m1), accurate to 0.0002g. At the same
time, weigh the same air balance specimen according to the method specified in YS/T 575.22,
and determine the air balance wet water content (wwet water).
5.4 Test data processing
The loss on ignition content is calculated by the loss on ignition mass fraction wloss on ignition,
calculated according to Formula (1).
6 Determination Method of Pre-Dried Specimen
6.1 Principle
The specimen pre-dried in an oven at 110°C ± 5°C is heated in a high-temperature furnace at
1075°C ± 25°C to constant weight; and the loss on ignition is calculated based on the difference
in mass before and after heating.
6.3 Test procedures
6.3.1 Parallel test
Perform two parallel tests and take the average value.
6.3.2 Crucible constant weight
6.3.3 Determination
6.3.3.1 Weigh 1.0g±0.1g of the pre-dried specimen (6.2) into a constant weight crucible (6.3.2),
and record the weight of the pre-dried specimen (m4), accurate to 0.0002g.
6.3.3.2 Place the crucible containing the pre-dried specimen (6.3.3.1, if a platinum crucible is
used, the crucible containing the specimen shall be placed in a high-temperature furnace at
375°C±25°C and heated for 10min) in a high-temperature furnace (4.3) at 1075°C±25°C and
heat for 60min±2min. Take it out and cool it slightly. Then place it in a desiccator (4.4); cool it
to room temperature; take it out quickly and weigh it, accurate to 0.0002g. Place the crucible
(6.3.3.1) in the same high-temperature furnace (4.3) and heat it at 1075°C±25°C for
30min±2min.
6.4 Test data processing
The loss on ignition content is calculated as the loss on ignition mass fraction wloss on ignition;
calculated according to Formula (2).
7 Precision
7.1 Repeatability
The difference between two independent test results obtained under repeatability conditions is
no greater than 0.35%.
8 Test Report
This Clause stipulates that the contents of the test report, which at least includes the following
aspects.
YS/T 575.19-2021
YS
NONFERROUS METAL INDUSTRY STANDARD
ICS 71.040.40
CCS H 30
Replacing YS/T 575.19-2007
Methods for Chemical Analysis of Bauxite – Part 19.
Determination of Loss on Ignition – Gravimetric Method
Issued on. MARCH 05, 2021
Implemented on. JULY 1, 2021
Issued by. Ministry of Industry and Information Technology of the People's
Republic of China.
Table of Contents
Foreword... 3
Introduction... 6
1 Scope... 7
2 Normative References... 7
3 Terms and Definitions... 7
4 Apparatus... 8
5 Air Balance Wet Water Correction Method... 8
6 Determination Method of Pre-Dried Specimen... 10
7 Precision... 11
8 Test Report... 11
Foreword
This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for
Standardization – Part 1.Rules for the Structure and Drafting of Standardizing Documents.
This Document is Part 19 of YS/T 575 Methods for Chemical Analysis of Bauxite. YS/T 575
has published the following parts.
--- Part 1.Determination of aluminum oxide content EDTA titrimetric method;
--- Part 2.Determination of silicon dioxide content Gravimetric-molybdenum blue
photometric method;
--- Part 3.Determination of silicon dioxide content molybdenum blue photometric method;
--- Part 4.Determination of iron oxide content - Dichromate titrimetric method;
--- Part 5.Determination of iron oxide content - Orthophenanthroline photometric method;
--- Part 6.Determination of titanium dioxide content - Diantipyrylmethane photometric
method;
--- Part 7.Determination of calcium oxide content - Flame atomic absorption
spectrophotometric method;
--- Part 8.Determination of magnesium oxide content - Flame atomic absorption
spectrophotometric method;
--- Part 9.Determination of potassium oxide and sodium oxide content - Flame atomic
absorption spectrophotometric method;
--- Part 10.Determination of manganese oxide content - Flame atomic absorption
spectrophotometric method;
--- Part 11.Determination of chromium oxide content - Flame atomic absorption
spectrophotometric method;
--- Part 12.Determination of vanadium pentoxide content N-benzoyl-N-
phenylhydroxylamine photometric method;
--- Part 13.Determination of zinc content - Flame atomic absorption spectrophotometric
method;
--- Part 14.Determination the total content of rare earth oxide - Tribromo-arsenazo
photometric method;
--- Part 15.Determination of gallium oxide content - Rhodamine B-extraction photometric
method;
--- Part 16.Determination of phosphorus pentoxide content - Molybdenum blue
spectrophotometric method;
--- Part 17.Determination of sulfur content - Direct combustion-iodometric method;
--- Part 18.Determination of total carbon content - Non-aqueous titrimetric method after
combustion;
--- Part 19.Determination of loss on ignition - Gravimetric method
--- Part 20.Preparation of pre-dried sample;
--- Part 21.Determination of organic carbon content titrimetric method;
--- Part 22.Determination of hydroscopic moisture on gravimetric method;
--- Part 23.Determination of element contents X-ray fluorescence spectrometric method;
--- Part 24.Determination of carbon content and sulfur content - Infrared absorption method'
--- Part 25.Determination of sulfur content - Coulometric titration method.
Some contents of this Document may involve patents. The issuing agency of this Document
shall not assume the responsibility to identify these patents.
This Document replaced YS/T 575.19-2007 Methods for Chemical Analysis of Bauxite - Part
19 Determination of the Loss on Ignition - Gravimetric Method. Compared with YS/T 575.19-
2007, this Document has the major technical changes as follows besides the structural
adjustments and editorial modifications.
a) Modify the original standard to "air balance wet water correction method"; add "pre-dried
specimen determination method"; and adopt the arbitration method of "air balance wet
water correction method" (see Clauses 5 and 6 of this Edition; Clauses 6 and 7 of the
2007 Edition);
b) Modify the precision (see Clause 7 of this Edition; Clause 8 of the 2007 Edition);
c) Modify the test report (see Clause 8 of this Editon; Clause 9 of the 2007 Edition).
This Document was proposed by and under the jurisdiction of National Technical Committee
on Nonferrous Metals of Standardization Administration of China (SAC/TC 243).
Drafting organizations of this Document. Chalco Zhengzhou Nonferrous Metals Research
Institute Co., Ltd.; Shandong Nanshan Aluminum Co., Ltd.; Guangdong Academy of Sciences
Industrial Analysis and Testing Center; Chalco Mining Co., Ltd.; China Aluminum Shandong
Co., Ltd.; Kunming Metallurgical Research Institute Co., Ltd.; and Shenzhen Zhongjin Lingnan
Nonferrous Metals Co., Ltd. Shaoguan Smelter.
Chief drafting staffs of this Document. Bai Wanli, Ma Huixia, Song Lili, Liu Jing, Ma Yanhong,
Zhang Yingying, Peng Zhan, Huang Puying, Wang Fenghui, Tian Rui, Luo Shun, Feng
Jingdong, Wang Hengyu, Tang Qing, Liu Gangxiang, Nian Lina, Yan Yuxin, He Jianwen, and
Wang Lijuan.
The historical editions replaced by this Document are as follows.
--- YS/T 575.19-2006 was first-time published in 2006; first-time revised in 2007;
--- It is second-time revised hereby.
1 Scope
This Document specifies the method for determining the loss on ignition in bauxite ores.
This Document is applicable to the determination of the loss on ignition in bauxite ores, with a
determination range of 10.00% ~ 30.00%. Other types of aluminosilicates such as clay and
kaolin can be used for reference.
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in this Document. For the dated documents, only the versions with the dates
indicated are applicable to this Document; for the undated documents, only the latest version
(including all the amendments) is applicable to this Document.
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of
limiting values
YS/T 575.20 Methods for chemical analysis of bauxite - Part 20.Preparation of pre-dried
sample
YS/T 575.22 Methods for chemical analysis of bauxite - Part 22.Determination of
hydroscopic moisture - Gravimetric method
3 Terms and Definitions
For the purposes of this Document, there are no terms and definitions apply.
4 Apparatus
4.1 Plate. flat bottom, the plate bottom area shall be no greater than 100 cm2.
4.2 Crucible. platinum crucible or porcelain crucible, diameter is about 30 mm, height is about
45 mm. The porcelain crucible shall be burned in a high temperature furnace at 1075°C ± 25°C
for at least 3 h before the first use.
4.6 Analytical balance. the actual graduation value is 0.0001g.
4.7 Weighing bottle. with lid, large enough to hold the required specimen volume.
5 Air Balance Wet Water Correction Method
5.1 Principle
Weigh two specimens after air balance; one for air balance wet water content measurement, the
other for loss on ignition measurement; use air balance wet water content correction to calculate
loss on ignition.
5.3 Test procedures
5.3.1 Parallel test
Perform two parallel tests and take the average value.
5.3.2 Constant weight of crucible
5.3.3 Determination
5.3.3.1 Weigh 1.0g ± 0.1g of air balance specimen (5.2) into a constant weight crucible (5.3.2);
and record the weighed mass of the air balance specimen (m1), accurate to 0.0002g. At the same
time, weigh the same air balance specimen according to the method specified in YS/T 575.22,
and determine the air balance wet water content (wwet water).
5.4 Test data processing
The loss on ignition content is calculated by the loss on ignition mass fraction wloss on ignition,
calculated according to Formula (1).
6 Determination Method of Pre-Dried Specimen
6.1 Principle
The specimen pre-dried in an oven at 110°C ± 5°C is heated in a high-temperature furnace at
1075°C ± 25°C to constant weight; and the loss on ignition is calculated based on the difference
in mass before and after heating.
6.3 Test procedures
6.3.1 Parallel test
Perform two parallel tests and take the average value.
6.3.2 Crucible constant weight
6.3.3 Determination
6.3.3.1 Weigh 1.0g±0.1g of the pre-dried specimen (6.2) into a constant weight crucible (6.3.2),
and record the weight of the pre-dried specimen (m4), accurate to 0.0002g.
6.3.3.2 Place the crucible containing the pre-dried specimen (6.3.3.1, if a platinum crucible is
used, the crucible containing the specimen shall be placed in a high-temperature furnace at
375°C±25°C and heated for 10min) in a high-temperature furnace (4.3) at 1075°C±25°C and
heat for 60min±2min. Take it out and cool it slightly. Then place it in a desiccator (4.4); cool it
to room temperature; take it out quickly and weigh it, accurate to 0.0002g. Place the crucible
(6.3.3.1) in the same high-temperature furnace (4.3) and heat it at 1075°C±25°C for
30min±2min.
6.4 Test data processing
The loss on ignition content is calculated as the loss on ignition mass fraction wloss on ignition;
calculated according to Formula (2).
7 Precision
7.1 Repeatability
The difference between two independent test results obtained under repeatability conditions is
no greater than 0.35%.
8 Test Report
This Clause stipulates that the contents of the test report, which at least includes the following
aspects.
......
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 11 pages — is available in the English PDF.
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Related Standards
GB/T 8170-2008 — Rules of rounding off for numerical values & expression and judgement of limiting values
YS/T 575.1-2007 — Methods for chemical analysis of bauxite - Part 1: Determination of aluminium oxide content - EDTA titrimetric method
YS/T 575.16-2007 — Methods for chemical analysis of bauxite. Part 16: Determination of phosphorus pentoxide content. Molybdenum blue spectrophotometric method
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