GB/T 39202-2020 in English
VALIDGuide for circular economy evaluating—Iron and steel industry
- Issued on:2020-10-11
- Implemented on:2021-05-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$214.00
《GB/T 39202-2020循环经济评价 钢铁行业》由TC415（全国产品回收利用基础与管理标准化技术委员会）归口，主管部门为国家标准化管理委员会。
Introduction
Analysis of the core framework of the standard
This standard constructs a three-level indicator system:
| Indicator level | Contents included | Typical indicator examples |
|---|---|---|
| First-level indicators (2 categories) | Resource output, resource recycling | - |
| Second-level indicators (6 categories) | Energy/water resources/raw materials output, gas/water/solid waste utilization | Blast furnace gas utilization rate |
| Third-level indicators (19 items) | Specific parameters such as process energy consumption and resource recycling | Converter gas recovery per ton of steel |
Detailed explanation of key technical indicators
Key points of energy consumption control
The energy consumption limit of the coking process is 97kgce/t, and the converter process needs to achieve negative energy steelmaking (≤-30kgce/t). The electric furnace process is divided into the full scrap steel method (59kgce/t) and the hot iron hot charging process (45kgce/t).
Hard requirements for resource recycling
- Gas utilization rate: Coke oven/blast furnace gas must reach 100%
- Solid waste utilization: Comprehensive utilization rate of blast furnace slag/steel slag/iron-containing dust sludge ≥ 100%
- Water recycling: Recycling rate ≥ 98%
Evaluation implementation points
| Evaluation level | Index range | Industry share | Core requirements |
|---|---|---|---|
| Leading level | PT≥95 | ≤10% | Advanced technologies such as waste heat power generation are required |
| Advanced level | 90≤PT＜95 | ≤20% | Achieve cascade utilization of energy |
| Standard level | 85≤PT＜90 | ≤50% | Complete basic indicator requirements |
Data collection specifications
Energy data shall be uniformly converted according to the conversion coefficient in Appendix B:
Electricity equivalent value 0.1229kgce/(kW·h), blast furnace gas 0.1071kgce/m³, steam (medium pressure) 0.1038kgce/kg
Standard evolution background
This standard inherits GB/T 34345 technical framework, targeting the characteristics of the steel industry:
- Strengthen the hierarchical control of process energy consumption (8 process differentiation indicators)
- Innovatively introduce negative energy steelmaking evaluation
- Highlight the whole process resource cycle (from raw materials to end management)
Enterprise implementation suggestions
Technical transformation path
Take a steel plant with an annual output of 5 million tons as an example:
- Install gas recovery monitoring system to improve the utilization rate by 3-5%
- Steel slag micro-powder production line makes the comprehensive utilization rate reach 102%
- Digital water circulation system achieves a reuse rate of 99.2%
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