JB/T 14329-2021 (JB/T14329-2021, JBT 14329-2021, JBT14329-2021)
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Ring-roller micro powder mill
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JB/T 14329-2021
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Standards related to: JB/T 14329-2021
| Standard ID | JB/T 14329-2021 (JB/T14329-2021) | | Description (Translated English) | (Ring roller type micro-powder mill) | | Sector / Industry | Mechanical & Machinery Industry Standard (Recommended) | | Classification of Chinese Standard | D94 | | Classification of International Standard | 73.120 | | Word Count Estimation | 11,135 | | Date of Issue | 2021-12-02 | | Date of Implementation | 2022-04-01 | | Drafting Organization | Ministry of Industry and Information Technology | | Administrative Organization | Ministry of Industry and Information Technology | | Regulation (derived from) | Ministry of Industry and Information Technology Announcement No. 33 of 2021 | | Summary | This standard specifies the type and basic parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of ring-roll micropowder mills. This standard is applicable to the ring roller type grinding of non-flammable and explosive mineral materials such as gypsum, limestone, barite, fluorite, apatite, feldspar and calcite with a Mohs hardness not greater than 6 and a humidity below 6%. Micro powder mill. | JB/T 14329-2021
JB
MECHANICAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 73.120
D 94
Ring-roller micro powder mill
环辊式微粉磨
ISSUED ON: DECEMBER 02, 2021
IMPLEMENTED ON: APRIL 01, 2022
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Types and basic parameters ... 5
3.1 Type ... 5
3.2 Model ... 6
3.3 Basic parameters ... 7
4 Technical requirements ... 7
4.1 General requirements... 7
4.2 Appearance quality requirements ... 8
4.3 Quality requirements for main components ... 8
4.4 Assembly requirements ... 8
4.5 Performance requirements of whole machine ... 9
4.6 Safety requirements ... 9
4.7 Requirements for no-load test ... 9
4.8 Load test requirements... 10
4.9 Completeness ... 10
5 Test method ... 10
5.1 General test ... 10
5.2 No-load test ... 11
5.3 Load test ... 11
6 Inspection rules ... 12
6.1 Inspection classification ... 12
6.2 Exit-factory inspection ... 12
6.3 Type inspection ... 12
7 Marking, packaging, transportation, storage ... 13
Ring-roller micro powder mill
1 Scope
This standard specifies the type and basic parameters, technical requirements, test
methods, inspection rules, markings, packaging, transportation and storage of ring
roller micro-powder mills.
This standard is applicable to the ring roller micro powder mill for grinding non-
flammable and explosive mineral materials, which have Mohs hardness of not greater
than grade 6 and relative humidity below 6%, such as gypsum, limestone, barite,
fluorite, apatite, feldspar and calcite (hereinafter referred to as micro powder mill).
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 standard.
GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 699-2015 Quality carbon structural steels
GB/T 1591-2018 High strength low alloy structural steels
GB/T 1804-2000 General tolerances - Tolerances for linear and angular dimensions
without individual tolerance indications
GB/T 3768 Acoustics - Determination of sound power levels and sound energy
levels of noise sources using sound pressure - Survey method using an enveloping
measurement surface over a reflecting plane
GB/T 5226.1 Electrical safety of machinery - Electrical equipment of machines -
Part 1: General requirements
GB/T 6388 Transport package shipping mark
GB/T 8923.1-2011 Preparation of steel substrates before application of paints and
related products - Visual assessment of surface cleanliness - Part 1: Rust grades and
preparation grades of uncoated steel surface and steel surface after complete
removal of original coating
GB/T 11352-2009 Carbon steel castings for general engineering purpose
GB/T 13306 Plates
GB/T 19418 Arc-welded Joints in steel - Guidance on quality levels for
imperfections
GB/T 25706 Code of designations for mining machinery products
GB/T 37400.3-2019 Heavy mechanical general technical specification - Part 3:
Welding parts
GB/T 37400.10 Heavy mechanical general technical specification - Part 10:
Assembling
GB/T 37400.12 Heavy mechanical general technical specification - Part 12: Painting
GB/T 37400.13 Heavy mechanical general technical specification - Part 13:
Packaging
3 Types and basic parameters
3.1 Type
The main machine of the micro powder mill is mainly composed of a main shaft, a
multi-layer turntable, multiple rollers, a grinding ring, and a machine body. The type is
as shown in Figure 1. This Figure does not determine the special structure of the micro
powder mill. The main machine of the micro powder mill and the equipped fan, powder
classifier, cyclone powder collector, pulse dust collector, etc. constitute a complete
powder making system.
4.2 Appearance quality requirements
4.2.1 There shall be no burrs, bruises, rust on the main machined surface.
4.2.2 The surface of the main welded parts shall be flat. There shall be no visible
unevenness, when visually inspected.
4.2.3 Before painting, the surface of steel parts shall be treated with anti-rust treatment.
The treatment level shall not be lower than the requirements of St2 level in GB/T
8923.1-2011.
4.2.4 The exterior paint requirements of the micro powder mill shall comply with the
provisions of GB/T 37400.12.
4.2.5 The font of the sign shall be clear. The fixed position shall be obvious, firm, not
skewed.
4.3 Quality requirements for main components
4.3.1 Main parts
4.3.1.1 The performance of the main shaft of the main engine and the main shaft of the
powder classifier shall not be lower than the requirements of No.45 steel in GB/T 699-
2015.
4.3.1.2 The performance of the main engine body shall not be lower than the
requirements of ZG 270-500 steel in GB/T 11352-2009.
4.3.1.3 The performance of the main engine cylinder shall not be lower than the
requirements of Q345B steel in GB/T 1591-2018.
4.3.1.4 The unmarked linear dimension tolerance of the cutting process on the drawing
shall comply with the level m requirements of GB/T 1804-2000.
4.3.2 Welded structural parts
4.3.2.1 The tolerances of the unmarked linear and angular dimensions of the main
structural parts shall comply with the provisions of Class B in GB/T 37400.3-2019. The
unmarked geometric tolerances shall comply with the provisions of Class F in GB/T
37400.3-2019.
4.3.2.2 Welded structural parts shall be cleaned of welding slag and deburred. The main
welded structural parts shall be stress relieved.
4.4 Assembly requirements
4.4.1 The components of the main machine of the micro-powder mill and the powder
classifier shall pass the inspection of the inspection department. Outsourced parts shall
have quality certification documents or be assembled after passing the inspection of the
inspection department.
4.4.2 The assembly of the micro powder mill shall comply with the provisions of GB/T
37400.10.
4.5 Performance requirements of whole machine
4.5.1 Specification parameters, such as the motor power of the micro-powder mill and
the technical parameters on the nameplate, shall comply with the provisions in Table 1.
4.5.2 The structure and performance of the micro powder mill shall be able to run
continuously for 24 hours.
4.5.3 The standard production capacity and finished product particle size of the micro
powder mill shall comply with the provisions in Table 2.
4.5.4 The service life of the main wearing parts (rollers and rings) of the micro powder
mill, when processing materials with a Mohs hardness not greater than grade 3, ensuring
that the particle size of the finished product is not greater than 15 μm and the sieve rate
is not lower than 97%:
a) Grinding roller: Not less than 5000 h;
b) Grinding ring: Not less than 7200 h.
4.5.5 The service life of the main machine of the micro powder mill, before the first
overhaul, shall not be less than 15000 h (subject to the replacement of the turntable).
4.6 Safety requirements
4.6.1 The exposed rotating parts and transmission parts of the micro powder mill shall
be equipped with safety protection devices.
4.6.2 The joints of the micro-powder mill shall be tightly sealed; no dust shall leak.
4.6.3 The electric control box shall be equipped with overload protection devices, for
the motors of the micro-powder mill's main machine, powder classifier and fan. The
electric control box shall also have an interlock control function. Other safety
requirements of the electric control box shall comply with the provisions of GB/T
5226.1.
4.6.4 The noise sound pressure level of the on-site control room shall not exceed 85
dB(A).
4.7 Requirements for no-load test
4.7.1 Requirements for no-load test of the main machine of micro powder mill
5.1.2 The physical and chemical tests of the main parts are subject to the material quality
certificate or the physical and chemical test report.
5.1.3 The weld quality requirements and defect classification test methods for main
welded structural parts shall comply with the provisions of GB/T 19418.
5.2 No-load test
5.2.1 No-load test of the main machine of micro powder mill
5.2.1.1 The no-load test of the main machine of the micro powder mill shall be carried
out on the special test bench of the manufacturer.
5.2.1.2 During the no-load test, the main machine of the micro-powder mill shall be
manually cranked or started by jogging.
5.2.1.3 The temperature of the bearing of the main machine of the micro powder mill
is measured by a spot thermometer or a sensor near the bearing.
5.2.1.4 The test method of the no-load noise of the micro-powder mill host shall comply
with the provisions of GB/T 3768.
5.2.2 No-load test of powder classifier
5.2.2.1 The no-load test of the powder classifier shall be carried out on the working
platform of the manufacturer. During the test, the casing shall be fixed on the platform
and the frequency converter shall be connected.
5.2.2.2 Measure the error -- between the output shaft speed value of the frequency
conversion motor of the powder classifier and the digital display value of the frequency
converter.
5.2.2.3 The temperature of the powder classifier bearing is measured near the bearing
by a spot thermometer or sensor.
5.2.2.4 The test method for the no-load noise of the classifier shall comply with the
provisions of GB/T 3768.
5.3 Load test
5.3.1 Determination of the production capacity of the micro powder mill: It shall be
measured at the finished product packaging place for 20 minutes; then calculate the
hourly weight, according to the number of packaging bags. The number of actual
measurements shall not be less than three; take the average value.
5.3.2 The particle size measurement of the finished product of the micro powder mill:
It shall take about 100 g of the finished product sample, to measure the particle size of
the finished product, on the laser particle size analyzer. Use standard samples for
c) When the production is restored, after suspension for more than 1 year;
d) Where there is a large difference between the exit-factory inspection result and
the previous type inspection;
e) When the national quality supervision and inspection agency puts forward the
requirements for type inspection.
6.3.2 Type inspection items shall include all the requirements of this standard.
6.3.3 The type inspection shall be carried out by randomly selecting one product that
has passed the exit-factory inspection. If the inspection is unqualified, it shall double
the sample for re-inspection. If the re-inspection is still unqualified, the type inspection
shall be judged as unqualified.
7 Marking, packaging, transportation, storage
7.1 The micro-powder mill shall be fixed with a signboard, at an appropriate and
obvious place. The type and size of the signboard shall meet the requirements of GB/T
13306, which shall indicate the following contents:
a) Product name and model;
b) Main technical parameters;
c) Implemented standard number of product;
d) The name and address of the manufacturer;
e) Exit-factory number and date of manufacture.
7.2 The micro powder mill shall provide the following accompanying documents:
a) Product quality certification documents;
b) Product instruction manual;
c) Packing list or packing catalog;
d) Foundation drawing and installation drawing;
e) Consumable parts (accessories) catalog.
7.3 Before packaging, the micro powder mill shall be removed of oil stains and water
marks. All exposed processing surfaces must be painted with anti-rust grease.
7.4 The packaging mark of micro-powder mill shall comply with the provisions of
GB/T 191 and GB/T 6388. It shall indicate the following contents:
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