This standard specifies the requirements, test methods, inspection rules, marking, transportation and storage of aluminum fluoride. This standard applies to aluminum fluoride prepared by the reaction of hydrogen fluoride or hydrofluoric acid with aluminum hydroxide. Aluminum fluoride is mainly used to adjust the molecular ratio of aluminum electrolyte. GB/T 4292-1999 Aluminum fluoride GB/T4292-1999 Standard download decompression password: www.bzxz.net

GB/T4292—1999
This standard is revised based on the production experience summary and production technology achievements of the fluoride salt industry over the years. This standard is the fourth revision of the "Aluminum Fluoride" standard. The technical content has the following changes and additions compared with GB/T4292-1984: 1 The content of each chemical component is calculated on a natural basis. 2 The product is divided into 4 grades according to chemical composition: special grade 1, special grade 2, grade 1, and grade 2. Special grade 1 and special grade 2 have been added. The current grade 1 and grade 2 are equivalent to the original grade 1 and grade 2, but higher than the original grade 1 and grade 2. From the date of implementation, this standard will replace GB/T4292—1984. This standard is proposed by the State Bureau of Nonferrous Metals Industry. This standard is under the jurisdiction of the China Nonferrous Metals Industry Standard Metrology and Quality Research Institute. Drafting unit of this standard: Xiangxiang Aluminum Factory.
The main drafters of this standard: Wang Youling, Li Zuxing, Huang Zhongxiao. 263
1 Scope
National Standard of the People's Republic of China
Aluminium fluoride
Aluminium fluoride
This standard specifies the requirements, test methods, inspection rules, marking, transportation and storage of aluminum fluoride. GB/T 4292—1999
Replaces GB/T4292—1984
This standard applies to aluminum fluoride prepared by the reaction of hydrogen fluoride or hydrofluoric acid with aluminum hydroxide. Aluminum fluoride is mainly used to adjust the ratio of aluminum electrolyte.
2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T1250--1989 Methods for expressing and determining limit values ​​GB/T8155-1987 Preparation and storage of aluminum fluoride samples for industrial use GB/T8156.1~8156.10-1987 Chemical analysis methods for aluminum fluoride for industrial use 3 Definitions
This standard adopts the following definitions:
Natural base
A calculation basis used when the chemical composition of the product sample is directly determined without air drying, drying, burning, moisture absorption and other processes.
Note: The sample should comply with the provisions of Article 1.3 of GB/T8155---1987 4 Requirements
4.1 Product classification
The product is divided into 4 grades according to the chemical composition: special grade 1, special grade 2, grade 1, and grade 2. 4.2 The chemical composition of aluminum fluoride should comply with the provisions of Table 1. Table 1 Chemical composition of aluminum fluoride
Chemical composition, %
Special first grade
Special second grade
Not less than
Approved by the State Administration of Quality and Technical Supervision on March 4, 199926+
Impurities, not more than
H, 0,550'C.1 h
Implementation on September 1, 1999
Not less than
The chemical composition content in the table is calculated on a natural basis, GB/T 4292--1999
Table 1 (end)
Chemical composition, %
Quality, not more than
2Rules for rounding off values ​​shall be in accordance with Article 5.2 of GB/T1250-1989. The rounded-off digits shall be consistent with the limit digits listed in the table. 4.3Aluminum fluoride is a white powder.
4.4 The product is allowed to have agglomerates with a diameter of 4~10mm, and its weight shall not exceed 5%. Test method
5.1 The chemical composition analysis method of aluminum fluoride shall be carried out in accordance with the provisions of GB/T8156. 5.2 The content of each chemical component on a natural basis is: Xi-. - Xi-g · (100 - W)/100 Where: X.—the content of a chemical component on a natural basis, %; X·—the content of a chemical component on a water basis, %; W——water content, %.
6 Inspection rules
6.1 Inspection and acceptance
H20.550'C,1 h
6.1.1 The product shall be inspected by the supplier's technical supervision department to ensure that the quality meets the requirements of this standard and fill in the quality certificate. 6.1.2 The purchaser shall inspect the received products in accordance with the provisions of this standard. If the inspection results do not match the grade stated in the quality certificate, the purchaser shall submit the matter to the supplier within one month from the date of receipt of the product, and the supplier and purchaser shall negotiate to resolve the issue. If arbitration is required, the arbitration sampling shall be conducted jointly by the supplier and purchaser.
6.2 Batching
Products shall be submitted for inspection in batches, and each batch shall consist of products of the same grade and weigh no more than 60t. 6.3 Inspection Items
Each batch of aluminum fluoride shall be inspected for chemical composition. 6.4 Number of sampling bags
6.4.1 Random sampling according to the number of sampling bags specified in Table 2 (when the total number of bags is greater than 500, the number of sampling bags shall be 3×N, where N is the total number of bags)
Table 2 Provisions for selecting the number of sampling bags
Total number of bags
82~101
102~125
126151
152~181
Select Minimum number of bags taken
Total number of bags
182~216Www.bzxZ.net
217~254
255~296
297343
344394
395~450
451~512
Minimum number of bags selected
6.4.2 Arbitration sampling and sample preparation
GB/T 4292—1999
Randomly select the number of sample bags specified in 6.4.1, use a copper tube probe with a diameter of 19~~25mm, insert it along the diagonal line of the sample bag to 3/4 of its depth to take equal amounts of samples, the total amount of the samples shall not be less than 2kg, mix it thoroughly, and use the quartering method to reduce it to not less than 500, and divide it into 3 parts, one for arbitration analysis, and the other one is kept by the supplier and the buyer. 6.5 Arbitration analysis
The arbitration analysis method for chemical analysis shall be carried out in accordance with the provisions of GB/T8156.1~8156.10 and Article 5.2 of this standard. 6.6 Judgment rules
When the arbitration analysis results of chemical analysis do not meet the requirements of the standard, the grade shall be re-determined according to the arbitration analysis results. 7 Marking, packaging, transportation, storage
7.1 Labeling
The packaging bag should indicate: supplier name, product name, product standard number, batch number, net weight 7.2 Packaging
The product is packed in a laminated plastic woven bag lined with a thin plastic bag and paper bag, with a net weight of 40kg, 50kg or 1000kg per bag. The packaging of export products shall comply with the commodity inspection or foreign business requirements.
7.3 Transportation
When the product is shipped, it must be packed in a clean and rainproof vehicle box, and products of different grades shall not be mixed. 7.4 Storage
The product must be stored in a dry warehouse to avoid damage, contamination and moisture, and the product should be stacked in batches. 7.5 Quality Certificate
Each batch of products shall be accompanied by a quality certificate, which shall indicate: a) name of supplier;
b) product name;
c) grade;
d) batch number;
e) weight or number of pieces;
f) stamp of the technical supervision department;
g) number of this standard;
h) date of manufacture.
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