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GB/T 33908-2017: Technical specification for testing of liquidus temperature of the electrolyte
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 33908-2017 | English | 199 |
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Technical specification for testing of liquidus temperature of the electrolyte
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GB/T 33908-2017
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Basic data | Standard ID | GB/T 33908-2017 (GB/T33908-2017) | | Description (Translated English) | Technical specification for testing of liquidus temperature of the electrolyte | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H21 | | Classification of International Standard | 71.100.10 | | Word Count Estimation | 10,111 | | Date of Issue | 2017-07-12 | | Date of Implementation | 2018-06-01 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | GB/T 33908-2017: Technical specification for testing of liquidus temperature of the electrolyte---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Technical specification for testing of liquidus temperature of the electrolyte
ICS 71.100.10
H21
National Standards of People's Republic of China
Technical specification for determination of primary crystal temperature of aluminum electrolytes
2017-07-12 released
2018-06-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
China National Standardization Management Committee released
Foreword
This standard is drafted in accordance with the rules given in GB/T 1.1-2009.
This standard is proposed by China Nonferrous Metals Industry Association.
This standard is owned by the National Committee for the Standardization of Nonferrous Metals (SAC/TC243).
This standard is responsible for drafting units. China Aluminum Industry Co., Ltd. Zhengzhou Research Institute Co., Ltd., non-ferrous metals technology and economic research institute.
This standard participates in the drafting unit. Baotou Aluminum Company Limited.
The main drafters of this standard. warehouse Xianghui, Zhang Shuzhao, Li Rongzhu, Li Bo, Liu Jing, Zhang Xiaoping, Li Ruiling.
Technical specification for determination of primary crystal temperature of aluminum electrolytes
1 Scope
This standard specifies the basic requirements of the initial crystallization temperature of the electrolyte and the speed of the sample during the measurement. The identification of the inflection point of the primary crystal temperature
And cooling speed and other technical requirements.
This standard is suitable for the determination of the initial crystallization temperature of aluminum electrolytes by step cooling curve method. The measurement range is 800 ° C to 1000 ° C.
2 terms and definitions
The following terms and definitions apply to this document.
2.1
Primary crystal temperature
The temperature at which the electrolyte begins to crystallize is also considered to be the temperature at which the aluminum electrolyte begins to convert from a liquid state to a solid state.
2.2
Step - down curve method stepcoolingcurvemethod
The method of measuring the primary crystallization temperature of the aluminum electrolyte is determined by first-step cooling of the aluminum electrolyte sample under the prescribed conditions, and then recording
The entire cooling curve has a stagnant period (inflection point).
3 aluminum electrolytic sampling and sample preparation of the general requirements
3.1 The aluminum electrolyte sample is sampled in the cell according to Appendix A.
3.2 Sampling After crushing and grinding to all through a 75 μm standard screen.
3.3 The samples are pre-dried in an oven at 110 ° C ± 5 ° C for at least 3 hours, taken out and stored in a desiccator.
4 Determination of cycle and equipment selection
4.1 Determination of the cycle
Should be determined according to the production of enterprises, usually 15 days. With one of the following conditions, should be appropriate to shorten the initial crystal temperature measurement
cycle.
a) the recent addition of different types, components of the electrolyte;
b) the recent anode effect of the electrolytic cell is more frequent and unstable than the original;
c) The cell is restarted after overhaul.
4.2 Auxiliary equipment
4.2.1 Oven. temperature can be controlled at 110 ℃ ± 5 ℃.
4.2.2 Analysis of the balance. the amount of 0.01g.
4.2.3 melting crucible. the choice of a certain resistance to fluoride corrosion of the material, should use special corundum or heat-resistant stainless steel, stainless steel crucible
The size of the cup should be φ20 × 70mm. The molten sample can be contained and does not react with the sample.
4.2.4 Crushing and grinding equipment. mainly including jaw crusher, grinding machine, the electrolyte can be crushed and ground to all through the 75μm
Standard screen.
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