YS/T 1241-2018 English PDF (YST1241-2018)

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YS/T 1241-2018: Lithium sulfate
YS/T 1241-2018
NON-FERROUS METAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 77.120.99
H 64
Lithium Sulfate
硫酸锂
ISSUED ON: APRIL 30, 2018
IMPLEMENTED ON: SEPTEMBER 1, 2018
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 Requirements ... 4 
4 Test Methods ... 5 
5 Inspection Rules ... 5 
6 Marking, Packaging, Transportation, Storage and Quality Certificate ... 6 
7 Order Form (or contract) Content ... 7 
Lithium Sulfate
1 Scope
This Standard specifies the requirements, test methods, inspection rules, marking,
packaging, transportation, storage, quality certificate and order form (or contract)
content.
This Standard is applicable to solid by-product lithium sulfate, which is generated
during the preparation of lithium iron phosphate through wet process.
2 Normative References
The following documents are indispensable to the application of this Standard. In terms
of references with a specified date, only versions with a specified date are applicable
to this Standard. In terms of references without a specified date, the latest version
(including all the modifications) is applicable to this Standard.
GB/T 191 Packaging - Pictorial Markings for Handling of Goods
GB/T 6678-2003 General Principles for Sampling Chemical Products
3 Requirements
3.1 Chemical Composition
Lithium sulfate’ chemical composition shall comply with the stipulations in Table 1.
Table 1 -- Chemical Composition
(mass fraction) %
Li2SO4H2O content,
not less than
Impurity Content, not more than
Na K Ca Mg Fe Cl Pb
Hydrochloric
Acid Insoluble
Matter
97.0 0.03 0.01 0.02 0.005 0.001 1.5 0.03 0.002 0.05
NOTE: Li2SO4H2O content shall be obtained through the calculation of Li content.
3.2 Appearance Quality
Products shall be white crystalline particles and have certain fluidity. There shall be no
visible foreign inclusions.
Along the center of a sack, insert the sampling tube into 2/3 area of the sack. After
mixing up the sample, use quartering method to divide the sample to around 200 g.
5.4.2 Sampling size
Sampling size shall comply with the stipulations in 7.6 in GB/T 6678-2003.
5.5 Determination of Inspection Result
5.5.1 When the result of chemical composition analysis is disqualified, take a doubled
size of samples from the same batch of products to conduct re-inspection of the
disqualified items. If the samples still fail in one of the items in the re-inspection result,
then, this batch of products shall be determined as disqualified.
5.5.2 When the samples are disqualified in appearance quality inspection, then, this
batch of products shall be determined as disqualified.
6 Marking, Packaging, Transportation, Storage and
Quality Certificate
6.1 Marking
On product packaging, the following shall be indicated:
a) Product’s name;
b) Serial number of this Standard;
c) Main content;
d) Batch number;
e) Net weight;
f) Supply-side’s name;
g) Place of production;
h) The marking of “keep away from the rain” in GB/T 191.
6.2 Packaging
Products shall adopt lined with plastic film bag. On the outside, products shall be
covered with double-layer packaging of plastic woven bag, or, be packed through
plastic coated bag. The internal bag shall be tied or heat-sealed; the external bag shall
be firmly sealed.