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GB/T 25708-2010 (GBT25708-2010)

GB/T 25708-2010_English: PDF (GBT 25708-2010, GBT25708-2010)
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GB/T 25708-2010English130 Add to Cart 0--9 seconds. Auto-delivery Ball mill and rod mill Valid GB/T 25708-2010

Standard ID GB/T 25708-2010 (GB/T25708-2010)
Description (Translated English) Ball mill and rod mill
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard D94
Classification of International Standard 73.120
Word Count Estimation 15,179
Date of Issue 2010-12-23
Date of Implementation 2011-07-01
Older Standard (superseded by this standard) JB/T 1406-2002
Quoted Standard GB/T 191; GB/T 700; GB/T 1174; GB/T 1348; GB/T 1804-2000; GB/T 3768; GB/T 5226.1; GB/T 5680; GB/T 7233.1-2009; GB/T 9444-2007; GB/T 9969; GB/T 10095.1; GB/T 10095.2; GB/T 13306; JB/T 5000.3-2007; JB/T 5000.4; JB/T 5000.6; JB/T 5000.8; JB/T 5000.12; JB/T 5000.13; JB/T 8853
Drafting Organization Luoyang Mining Machinery Engineering Design Institute Co., Ltd.
Administrative Organization National Mining Machinery Standardization Technical Committee
Regulation (derived from) National Standard Approval Announcement 2010 No.10 (Total No.165)
Proposing organization China Machinery Industry Federation
Issuing agency(ies) Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China
Summary This standard specifies the types and basic parameters of a ball mill and rod mill, technical requirements, test methods, inspection rules, signs and instructions, packaging, transport and storage. This standard applies to wet, dry grinding processes various hardness ores, rocks and other suitable mill and rod mill grinding materials.

Standards related to: GB/T 25708-2010

GB/T 25708-2010
ICS 73.120
D 94
Ball mill and rod mill
Issued by.
General Administration of Quality Supervision, Inspection
and Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic of
Table of Contents
Foreword ... 3 
1  Scope ... 4 
2  Normative references ... 4 
3  Types and basic parameters ... 5 
4  Technical requirements ... 13 
5  Test method ... 19 
6  Inspection rules ... 19 
7  Marking and operation instructions ... 20 
8  Packaging, transportation and storage ... 21 
Since implementation date of this Standard, previous Standard JB/T 1406-2002 Ball-mill
and rod-mill is abolished.
This Standard was proposed by China Machinery Industry Federation.
This Standard shall be under the jurisdiction of National Technical Committee (SAC/TC 88)
on Mining Machinery of Standardization Administration of China.
The responsible drafting organization of this Standard. Luoyang Mining Machinery
Engineering Design & Research Institute Co., Ltd.
The participating drafting organizations of this Standard. Shenyang Heavy Machinery
Group Co., Ltd, CITIC Heavy Industries Co., Ltd, Jinan Heavy Machinery Joint-stock Co.,
Ltd, Hengyang Heavy Machinery Co., Ltd, Sinosteel Co., Ltd., and Shendong Shankuang
Machinery Co., Ltd.
The chief drafting staffs of this Standard. Zhang Xiao, Li Chunran, Wang Jisheng, Yu Xiao,
Gao Junkun, Zhou Xiaoping, Zhao Heng, Yang Xianli, Liu Wanhua, Wang Jianhua, Fan
Yongqing, and Wang Chunhong.
Ball mill and Rod mill
1 Scope
This Standard specifies ball-mill and rod-mill’s types and basic parameters, technical
requirements, test methods, inspection rules, marking and operation instructions,
packaging, transportation and storage.
This Standard applies to ball-mills and rod-mills that grind ores, rocks and other suitable
materials of various hardness in wet and dry processes (hereinafter referred to as mills).
2 Normative references
The articles contained in the following documents have become part of this Standard
when they are quoted herein. For the dated documents so quoted, all the modifications
(excluding corrections) or revisions made thereafter shall not be applicable to this
Standard. For the undated documents so quoted, the latest editions shall be applicable to
this Standard.
GB/T 191 Packaging - Pictorial marking for handling of goods (GB/T 191-2008, ISO
780. 1997, MOD)
GB/T 700 Carbon structural steels (GB/T 700-2006, ISO 630. 1995, NEQ)
GB/T 1174 Cast bearing metals (GB/T 1174-1992, neq ISO 4382-1. 1991)
GB/T 1348 Spheroidal graphite iron castings (GB/T 1348-2009, ISO 1083.2004,
GB/T 1804-2000 General tolerances-Tolerances for linear and angular dimensions
without individual tolerance indications (eqv ISO 2768-1. 1989)
GB/T 3768 Acoustics - Determination of sound power levels of noise sources using
sound pressure - Survey method using an enveloping measurement surface over a
reflecting plane (GB/T 3768-1996, eqv ISO 3746. 1995)
GB/T 5226.1 Electrical safety of machinery - Electrical equipment of machines - Part
1. General requirements (GB 5226.1-2008, IEC 60204-1. 2005, IDT)
GB/T 5680 Austenitic manganese steel castings
GB/T 7233.1-2009 Steel castings - Ultrasonic examination - Part 1. Steel castings for
general purposes (ISO 4992-1. 2006, MOD)
Ø7300mm series are recommended to adopt slider bearing. Mills of which the barrel
diameter is less than Ø4000mm may also adopt rolling bearing.
4.2.3 Scavenge oil temperature rise of main bearing under normal operation shall not be
higher than 15°C; maximum scavenge oil temperature shall not be higher than 55°C.
4.2.4 For mills of which the barrel diameter is less than or equal to Ø4000mm series and
the power is less than or equal to 1600kW, pinion bearing is recommended to adopt
grease for fabrication; for mills of which the barrel diameter is greater than Ø4000mm
series and the power is greater than 1600kW; pinion bears are recommended to adopt
thin oil for lubrication.
4.2.5 Sound pressure level of noises during mill idling running shall not exceed 90dB (A).
4.2.6 Complete set of mill shall include host machine, main motor, spray lubrication device,
main bearing lubrication station, low-voltage centralized electrical control equipment, etc.
Synchronous transmission shall also include clutch; asynchronous transmission includes
reducer and coupling; gearless transmission shall also include brake. Mills of which the
barrel diameter is grater than or equal to Ø2700mm series shall be provided with
necessary auxiliary equipment (e.g. low-speed transmission device, jack-up device, etc.).
4.2.7 Lubrication device of mill shall operate reliably. If there is lubrication station, oil pump
motor and main motor shall have electrical interlock; it shall generates the signal when
lubrication system breaks down and cannot work properly, so as to ensure automatic
stopping of main motor. There shall be alarm signaling device for oil temperature, oil
pressure, oil mass and differential pressure. Lubrication system shall include safety valve,
pressure gauge, thermometer and other safety devices.
4.2.8 Inclination of oil return line is recommended to be 1.20 to 1.6.
4.3 Safety requirements
4.3.1 Rotating part of transmission gear shall be fitted with a protective cover; user shall
set up the protective railings around rotating parts.
4.3.2 Requirements of protective grounding, insulation resistance, pressure test, etc. shall
comply with relevant provisions of GB5226.1.
4.4 Requirements for main components and parts
4.4.1 Main bearing bush and slider bearing bush material shall not be lower than the
specifications on mechanical properties in table 5. Main bearing liner of which the barrel
diameter is less than Φ5500mm series is recommended to adopt tin-based cast bearing
alloy; alloy material shall not be lower than the specification on ZSnSb11Cu6 in GB/T1174;
alloy shall be fitted securely and have no shelling phenomenon. Main bearing liner of mills
of which the barrel diameter is greater than or equal to Φ5500mm series is recommended
to adopt molded copper tile structure; material is recommended to be copper-based cast
5 Test method
5.1 Appearance inspection is conducted visually; there shall be no significant defect.
5.2 During complete machine idling, noises shall be determined by the method specified
in GB/T3768.
5.3 Mill shall be conducted for idling test and meets the following requirements.
a) Continuous idling time is not less than 4h;
b) Main bearing scavenge oil temperature rise and the maximum scavenge oil
temperature shall comply with the provisions in 4.2.3;
c) Lubrication at all lubrication points shall be normal and there is no oil leakage
d) Noises shall comply with the provisions in 4.2.5;
e) Current of main motor has no significant change.
5.4 Load running test is conducted after empty load becomes qualified. Before running,
load mill barrel with steel ball (bar) and material that account 20% ~ 30% of maximum load
capacity. After running, add 10% every 30min, until full load. Operate for 24h continuously
and it shall achieve that.
a) Mills shall work smoothly without abnormality;
b) Screw holes, man-holes and flange junction surface of barrel shall have no leakage
c) Main bearing scavenge oil and maximum scavenge oil temperature shall comply with
the provisions of 4.2.3.
6 Inspection rules
6.1 Inspection classification
Inspection is divided into exit-factory inspection and type inspection.
6.2 Exit-factory inspection
6.2.1 Each mill shall pass the inspection by quality inspection department of manufacturer
before exit-factory; there shall be attached with document that proves product quality
during exit-factory.
7.3 Packing mark of mill shall comply with the provisions of GB/T 191.
8 Packaging, transportation and storage
8.1 Packages of mill shall comply with the provisions of JB/T5000.13.
8.2 Mill packing is divided into enclosed packing, nude packing, bundled packing, etc.
Components and parts shall be fixed firmly in cases during packing.
8.3 Exposed machining surface of mill shall receive preservative treatment and bound up
with oil paper or plastic film; anticorrosion period shall not be less than 1 year.
8.4 Outer wall of enclosed packing case shall be indicated with obvious wording mark and
comply with the provisions of 7.3; the contents of which include.
a) Name of consignment location and consignee;
b) Name of delivery location and delivery organization;
c) Contract number, product name and model;
d) Gross weight, net weight, carton number and dimensions;
e) Lifting operation, storage and transportation graphs and marks.
8.5 During nude packing, there shall be apparent wording marks at apparent positions,
which shall comply with the provisions of 7.3.
8.6 Following technical documents shall be attached.
a) Product quality document;
b) Product operation instructions;
c) Packing list and list of complete sets ...