YS/T 851-2012 English PDF (YST851-2012)

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YS/T 851-2012: Technical specification for on-line rotating degassing system used for aluminium and aluminium alloy melts
YS/T 851-2012
YS
NONFERROUS INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 77.180
H 93
Technical Specification for On-Line Rotating Degassing
System Used for Aluminum and Aluminum Alloys Melts
铝熔体在线连续除气装置
ISSUED ON: DECEMBER 28, 2012
IMPLEMENTED ON: JUNE 1, 2013
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 Classification of Degassing and Filtering Devices ... 5
4 Naming Rules for Devices ... 5
5 Technical Requirements ... 7
6 Inspection Methods ... 10
7 Inspection Rules ... 12
8 Marking, Packaging, Transportation and Storage ... 13
9 Random Files ... 14
10 Contents of Order Form (or Contract) ... 14
Technical Specification for On-Line Rotating Degassing
System Used for Aluminum and Aluminum Alloys Melts
1 Scope
This Standard specifies the classification, naming rules, technical requirements, inspection
methods, inspection rules and markings, packaging, transportation, storage, random documents,
order forms (or contracts) contents of aluminum melt online degassing and filtering devices.
This Standard applies to aluminum and aluminum alloy box-type online rotary spray degassing
and filtering devices (hereinafter referred to as degassing and filtering devices).
2 Normative References
The following documents are essential to the application of 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 3274 Hot-rolled plates/sheets and strips of carbon structural steels and high strength
low alloy structural steels
GB 3766 Hydraulic Fluid Power - General Rules Relating to Systems
GB 11984 Safety Regulation for Chlorine
GB 30078 Safety Specification for Wrought Aluminum and Aluminum Alloy Ingots
Production
GB 30079.1 Safety Specification for Aluminum and Aluminum Alloys Plates, Sheets and
Foils and Foils Production - Part 1: Cast-rolling
JB/T 5943 Construction machinery - General specifications for welding parts
YS/T 601 Technical Specification for Process of On-line Degassing and Filtering for
Aluminum and Aluminum Alloy Melts
3 Classification of Degassing and Filtering Devices
3.1 Classification of degassing devices
3.1.1 Classification according to the number of rotors
It is divided into single rotor, double rotor and multi-rotor degassing devices.
3.1.2 Classification according to box type
It is divided into fixed box type, pouring box type, rotating box type and vacuum box type
degassing devices.
3.2 Classification of filtering devices
3.2.1 Classification according to filtering levels
It is divided into single-stage, double-stage and multi-stage filtering devices.
3.2.2 Classification according to used filter media
It is divided into glass fiber cloth, foam ceramic plate, alumina ball and ceramic tube filtering
device.
3.2.3 Classification according to box type
It is divided into fixed box type, tilting box type and tube type filtering devices.
4 Naming Rules for Devices
4.1 Degassing device
4.1.1 The naming of the degassing device should include the equipment code, number of rotors,
maximum processing capacity of aluminum melt and box type.
4.1.2 The equipment code is represented by the English "APR" (APR is the English
abbreviation of Aluminum purification by rotating degas bank).
4.1.3 The number of rotors is represented by lowercase Arabic letters. Single rotors are marked
with "1", double rotors are marked with "2", and so on.
4.1.4 The maximum processing capacity of aluminum melt is expressed by numbers, in "t/h".
4.1.5 The box type is indicated by uppercase English letters. The fixed box type device is
marked with "F", the pouring box type device is marked with "P", the rotating box device is
marked with "R", and the vacuum box device is marked with "V".
5 Technical Requirements
5.1 Design requirements for degassing and filtering devices
5.1.1 General requirements
5.1.1.1 The design of degassing and filtering devices shall comply with the relevant provisions
of GB 11984, GB 30078, GB 30079.l, and YS/T 601.
5.1.1.2 The degassing and filtering device generally consists of the box and upper cover, upper
cover lifting mechanism, pouring mechanism, heater, automatic control system, rotor and
driving mechanism, gas control system, etc. The design of the degassing device should meet
the requirements of 5.1.2~5.1.8, the design of the filtering device shall meet the requirements
of 5.1.2~5.1.6.
5.1.2 Box and upper cover
The box body and upper cover are generally composed of lining, insulation layer and iron shell.
5.1.2.1 Lining
5.1.2.1.1 The lining is made of integrally sintered refractory materials, which shall be non-stick
to aluminum, resistant to high temperatures, washing, and thermal vibration, good thermal
insulation and not prone to chemical reactions with molten aluminum.
5.1.2.1.2 The shape and structure of the lining make it easy to manually clean the slag
accumulation.
5.1.2.1.3 The normal service life of the lining shall be ≥24 months.
5.1.2.2 Insulation layer
5.1.2.2.1 The insulation layer between the lining and the iron shell shall be filled tightly to
ensure that the lining is not loose.
5.1.2.2.2 The insulation layer between the lining and the iron shell has good thermal insulation
performance. The temperature rise of the iron shell during operation shall be < 45°C.
5.1.2.3 Iron shell
5.1.2.3.1 The steel used for the iron shell shall meet the requirements of GB/T 3274.
5.1.2.3.2 Iron shell welds shall meet the requirements of JB/T 5943.
5.1.2.3.3 The surface of the iron shell shall be conducted anti-rust treatment.
5.1.2.3.4 The overall metal frame of the iron shell is firmly welded and does not deform.
5.1.2.4 Sealing
The matching surface between the bottom of the upper cover and the box is inlaid with high-
temperature sealing strips, and the contact surfaces are flush and seamless to ensure that the hot
air in the box does not leak out.
5.1.2.5 Functional parts
5.1.2.5.1 The box shall be equipped with a drainage device.
5.1.2.5.2 The degassing box shall have good sealing performance and isolate gas from entering
and exiting.
5.1.2.5.3 When using chlorine gas, the upper cover shall be equipped with a safe discharge
device for treated gas.
5.1.3 Upper cover lifting mechanism
5.1.3.1 The upper cover lifting mechanism shall operate stably, safely and reliably.
5.1.3.2 The connection between the upper cover lifting mechanism and the upper cover shall
be safe and reliable.
5.1.4 Pouring mechanism
5.1.4.1 The pouring mechanism shall facilitate complete emptying of the metal in the box.
5.1.4.2 The pouring mechanism shall operate stably, be safe and reliable.
5.1.4.3 The pouring mechanism shall adopt a hydraulic system, and the hydraulic system shall
comply with the provisions of GB 3766.
5.1.5 Heater
5.1.5.1 The heater shall operate stably, be sturdy and durable.
5.1.5.2 Each component of the heater shall be easy to assemble and disassemble.
5.1.6 Automation control system
5.1.6.1 The automatic control system shall integrate the control electrical system, temperature
control system, etc., and the control accuracy shall comply with the provisions of YS/T 601.
5.1.6.2 The automated control system...