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GB/T 26731-2011 English PDF (GBT26731-2011)

GB/T 26731-2011 English PDF (GBT26731-2011)

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GB/T 26731-2011: Treatment and processing of waste tyre

This Standard specifies the terms, definitions, methods, safety and environmental protection requirements of the treatment and processing of waste tyre. This Standard is applicable to the treatment and processing of waste tyre.
GB/T 26731-2011
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 83.160.01
G 41
Treatment and Processing of Waste Tyre
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ISSUED ON: JULY 20, 2011
IMPLEMENTED ON: MARCH 1, 2012
Issued by: General Administration of Quality Supervision, Inspection and Quarantine;
Standardization Administration of the PEOPLE Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 4
4 Processing Treatment ... 5
5 Technical Requirements for Safety and Environmental Protection ... 10 Treatment and Processing of Waste Tyre
1 Scope
This Standard specifies the terms, definitions, methods, safety and environmental protection requirements of the treatment and processing of waste tyre.
This Standard is applicable to the treatment and processing of waste tyre. 2 Normative References
The following documents are indispensable to the application of this document. In terms of references with a specified date, only versions with a specified date are applicable to this document. In terms of references without a specified date, the latest version (including all the modifications) is applicable to this document. GB 4655 Safety Rules of Static Electricity in the Rubber Industry
GB 8978 Integrated Wastewater Discharge Standard
GB 12348 Emission Standard for Industrial Enterprises Noise at Boundary GB 15577 Safety Regulations for Dust Explosion Prevention and Protection GB 16297 Integrated Emission Standard of Air Pollutants
GB 50483 Code for Design of Environmental Protection of Chemical Industry Projects 3 Terms and Definitions
The following terms and definitions are applicable to this document.
3.1 Waste Tyre
Waste tyre refers to tyre that has lost its original use value and cannot be refurbished for continued use.
3.2 Break Up
Break up refers to a mode of processing waste tyre that changes or makes the original shape unrecoverable through physical methods like crushing.
3.3 Decomposition
Decomposition refers to a mode of processing waste tyre that changes or makes the original shape unrecoverable through chemical and thermal treatment.
3.4 Direct Use
Direct use refers to a mode of processing waste tyre that directly or indirectly uses the original characteristics of waste tyre without the decomposition treatment. 3.5 Disassembly
Disassembly refers to a mode of processing waste tyre that directly re-utilizes each part of tyre after decomposition.
4 Processing Treatment
4.1 Break Up
4.1.1 General rules
Through physical methods, such as: crushing and grinding, process waste tyre into usable materials.
4.1.2 Produce rubber powder (particle)
Crush and grind waste tyre into rubber particles of different particle sizes. The process of producing rubber powder (particle) is to process waste tyre in the mode of stepwise crushing after the separation of the bead wires to reach the required particle size. In addition, during the crushing process, the steel wires and fibers are gradually separated. The main methods of producing rubber powder (particle) include: normal- temperature mechanical method and freezing method.
4.1.2.1 Room-temperature mechanical method
Under normal-temperature conditions, through the modes of shearing, tearing and rolling, produce waste tyre into rubber powder (particle). The main methods include: generating, roller, milling and cone grinding, etc. See the process flow in Figure 1. The main equipment for producing rubber powder (particle) through the room- temperature mechanical method include: bead separator, crusher, coarse crusher, medium crusher, magnetic separator, fiber separator, fine crusher and screening machine, etc.

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