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GB/T 39733-2020 English PDF (GBT39733-2020)

GB/T 39733-2020 English PDF (GBT39733-2020)

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GB/T 39733-2020: Recycling iron-steel materials

This standard specifies the classification, technical requirements, inspection methods, acceptance rules, transportation and quality certificates of recycling iron-steel materials. This document applies to recycling iron-steel materials used as ferrite charge raw materials in ironmaking, steelmaking, casting and ferroalloy smelting.
GB/T 39733-2020
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 77.140.01
CCS H 40
Recycling iron-steel materials
ISSUED ON: DECEMBER 14, 2020
IMPLEMENTED ON: JANUARY 01, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Categories... 7
5 Technical requirements ... 15
6 Inspection method ... 16
7 Acceptance rules ... 18
8 Transport and quality certificate ... 19
Appendix A (Informative) Typical photos of recycling iron-steel materials ... 20 Appendix B (Informative) Characteristic attributes of recycling iron-steel materials ... 22
Appendix C (Normative) Testing method of radioactive materials ... 24
Appendix D (Informative) Standards for steel product analysis method ... 30 References ... 35
Recycling iron-steel materials
1 Scope
This document specifies the classification, technical requirements, inspection methods, acceptance rules, transportation and quality certificates of recycling iron-steel materials.
This document applies to recycling iron-steel materials used as ferrite charge raw materials in ironmaking, steelmaking, casting and ferroalloy smelting. 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 5085.1 Identification standards for hazardous wastes - Identification for corrosivity
GB 5085.2 Identification standards for hazardous wastes - Screening test for acute toxicity
GB 5085.3 Identification standards for hazardous wastes - Identification for extraction toxicity
GB 5085.4 Identification standards for hazardous wastes - Identification for ignitability
GB 5085.5 Identification standards for hazardous wastes - Identification for reactivity
GB 5085.6 Identification standards for hazardous wastes - Identification for toxic substance content
GB/T 5202 Radiation protection instrumentation - Alpha beta and alpha/beta (beta energy > 60 keV) contamination meters and monitors
GB/T 8170 Rules of rounding off for numerical values and expression and
judgement of limiting values
GB 18871 Basic standards for protection against ionizing radiation and for 3.6
Bulk density
The mass of recycling iron-steel materials per cubic meter.
3.7
Size
Physical dimensions of the appearance of recycling iron-steel materials: length, width, height, thickness or diameter.
Note: Generally, millimeters are used as the measurement unit.
3.8
Dismantling
The processing technology of decomposing the recycled machinery and
equipment, building materials, steel structures and other steel products into certain sizes, so that the recycling iron-steel materials are suitable for transportation and production.
3.9
Sorting
The process of classifying and screening recycling iron-steel products
according to the requirements of chemical composition, size, use, etc., separating them from other substances, to become specific types of
recycling iron-steel materials.
3.10
Cutting
The process of cutting or shearing recycling iron-steel products into recycling iron-steel materials with sizes that meet the requirements.
3.11
Shredding
The process of processing recycling iron-steel products using professional equipment into broken recycling iron-steel materials.
3.12
batch of recycling iron-steel materials shall be judged to be qualified; otherwise, the batch of recycling iron-steel materials shall be judged to not meet the requirements of this document.
8 Transport and quality certificate
8.1 Transportation
8.1.1 When shipping and loading vehicles (ships), each compartment (cabin, container) is generally only allowed to load the same type and the same designation of recycling iron-steel materials.
8.1.2 In order to load the compartment fully, two or more categories and designations of recycling iron-steel materials can also be loaded together, but they shall be separated as far as possible and clearly marked.
8.2 Quality certificate
8.2.1 When delivering recycling iron-steel materials, each delivery batch shall be accompanied by a quality certificate or delivery note.
8.2.2 The quality certificate or delivery note shall also be accompanied by radioactive inspection materials or certificates, indicating the following: a) The name of the supplier;
b) Mass;
c) Category and designation;
d) If it is an alloy recycling iron-steel material, the steel types and main alloy content must be indicated;
e) For the stainless steel recycling iron-steel materials, it needs to indicate the content of the main components (chromium, nickel).
Appendix B
(Informative)
Characteristic attributes of recycling iron-steel materials
B.1 Appearance characteristics
B.1.1 The appearance of recycling iron-steel materials shall be kept clean; there shall be no obvious waste paper, waste plastic, waste fiber and other
substances.
B.1.2 The appearance of recycling iron-steel materials shall be free from severe corrosion.
B.1.3 There shall be no airtight containers for recycling iron-steel materials. B.1.4 Container products such as steel cylinders and steel drums shall be cut and shredded until they do not have the function of the original container and the originally contained products shall be removed.
B.2 Chemical composition
B.2.1 The content of phosphorus and sulfur in recycling iron-steel materials is not more than 0.050%; the content of copper is not more than 0.300%; the content of arsenic is not more than 0.050%.
B.2.2 Among the alloy steel recycling iron-steel materials, the stainless steel's recycling iron-steel materials contain not less than 7.0% nickel (Ni) or not less than 11.5% chromium (Cr).
B.2.3 The chemical composition of cast iron and other alloy steel recycling iron- steel materials shall be negotiated and agreed between the supplier and the buyer.
B.3 Metal characteristics
Recycling iron-steel materials shall ensure high-quality metal properties; the TFe content is as shown in Table B.1
Appendix C
(Normative)
Testing method of radioactive materials
C.1 Testing instrument
The testing instrument shall comply with the requirements of GB 18871, GB/T 12162.3, GB/T 5202.
C.2 Measurement of external radiation penetration radiation dose rate
C.2.1 Measurement of natural environmental radiation background
C.2.1.1 Before the measurement of external radiation penetration radiation dose rate, the local natural environmental radiation background value shall be measured and determined first.
C.2.1.2 Select 3 ~ 5 points (which can be used as fixed survey points) on a flat and open ground without radioactive material that can represent the local normal natural radiation background state as the measurement points.
C.2.1.3 Place the measuring probe of the measuring instrument at a height of 1 m from the ground above the measuring point, to measure the external
radiation penetration radiation dose rate; read the measured value once every 10 s; take the average of the 10 readings as the measured value at this point; take the arithmetic average of the measured values at each measuring point as the average value of normal natural radiation.
C.2.2 Patrol testing
C.2.2.1 The raw materials shall be subject to patrol testing for radioactive material before passing through the port channel. During the patrol testing, the measuring instrument shall be as close as possible to the surface of the measured object or the surface of the container, car body, warehouse, etc. which are loaded with raw materials, to perform patrol testing for the peripheral surface of the measured object.
C.2.2.2 When it is found that the radioactivity has obviously exceeded the management limit of the three testing indicators during the patrol testing, it is judged as unqualified. When the radioactive material has been found to exceed the management limits of the three testing indicators, no sorting or selection will be carried out.
C.2.3 Distribution of test points
C.2.3.1 For trucks, trains, containers, ships that are used to transport raw K?? - The efficiency factor of the measuring instrument;
- The measurement reading of the measuring instrument, the in
microgray per hour (??Gy/h)
C.3 Testing of ??, ?? surface contamination
C.3.1 Testing requirements
Generally, the patrol testing and spot measurement of the ??, ?? surface
contamination level shall be carried out at the same time as the measurement of the external radiation penetration radiation dose rate. The patrol testing and the spot measurement of the item can be carried out separately.
C.3.2 Test point layout
For the testing of ??, ?? surface contamination level, the test points shall be arranged in accordance with the provisions of C.2.3; the measurement area shall be greater than 300 cm2.
C.3.3 Measurement of efficiency of ?? surface contamination measuring
instruments
C.3.3.1 Use ?? surface contamination measuring instrument to measure the count N0, ?? of the radiation background of the natural environment for 10 min. C.3.3.2 Measure the instrument calibration source for 5 min to get count N1, ??. C.3.3.3 Reverse the probe of the instrument by 180?? and then measure 5 min, to obtain the count N2, ?? of the calibration source (considering the unevenness of the plane source).
C.3.3.4 Calculate the efficiency factor ??4?€(??) of the instrument according to formula (C.3).
Where:
??4?€(??) - Efficiency factor of the testing instrument for ?? surface radiation contamination;
N1, ?? - The previous 5 min measured count of the calibration source;
N2, ?? - The count measured after the instrument probe is reversed 180??; N0, ?? - The radiation count of the instrument against the background;
Appendix D
(Informative)
Standards for steel product analysis method
GB/T 223.3 Methods for chemical analysis of iron, steel and alloy - The diantipyryl methane phosphomolybdate gravimetric method for the
determination of phosphorus content
GB/T 223.4 Methods for chemical analysis of iron, steel and alloy - The volumetric method for determination of manganese content by ammonium
nitrate oxidation
GB/T 223.5 Methods for chemical analysis of iron, steel and alloy - The reduced molybdosilicate spectrophotometric method for the determination of acid- soluble silicon content
GB/T 223.6 Methods for chemical analysis of iron, steel and alloy - The neutralization titrimetric method for the determination of boron content GB/T 223.7 Iron powder - Determination of iron content - Potassium dichromate titration method
GB/T 223.8 Methods for chemical analysis of iron, steel and alloy - The sodium fluoride separation-EDTA titration method for the determination of aluminum content
GB/T 223.9 Iron steel and alloy - Determination of aluminum content - Chrome azurol S photometric method
GB/T 223.11 Iron, steel and alloy - Determination of chromium content - Visual titration or potentiometric titration method
GB/T 223.12 Methods for chemical analysis of iron, steel and alloy - The sodium carbonate separation-diphenyl carbazide photometric method for the
determination of chromium content
GB/T 223.13 Methods for chemical analysis of iron, steel and alloy - The ammonium ferrous sulfate titration method for the determination of vanadium content
GB/T 223.14 Methods for chemical analysis of iron, steel and alloy - The N- Benzoy-N-Phenylhydroxylamine extraction photometric method for the
determination of vanadium content
GB/T 223.17 Methods for chemical analysis of iron, steel and alloy - The diantipyrylmethane photometric method for the determination of titanium

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