GB/T 33815-2017 in English
VALIDTechnical specification for wastewater treatment of iron ore mining and mineral processing enterprises
- Issued on:2017-05-31
- Implemented on:2018-02-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$156.00
《GB/T 33815-2017铁矿石采选企业污水处理技术规范》由TC317（全国铁矿石与直接还原铁标准化技术委员会）归口，主管部门为中国钢铁工业协会。
Introduction
GB/T 33815—2017 Standard Interpretation
GB/T 33815—2017 Technical Specification for Wastewater Treatment in Iron Ore Mining and Dressing Enterprises is a technical standard for wastewater treatment in the iron ore mining and dressing industry, aiming to guide enterprises to achieve wastewater reduction, resource utilization and harmless treatment. The standard has detailed provisions from terminology definition, wastewater classification, general requirements to specific treatment technologies, and is applicable to wastewater treatment in open-pit mining, underground mining and mineral processing.
1. Background and significance of standard formulation
With the rapid development of the iron ore mining and dressing industry, the scale of tailings ponds and waste rock dumps has continued to expand, and the discharge of acid mine wastewater and domestic sewage has become increasingly prominent. These wastewaters often contain high levels of suspended solids, heavy metals and acidic substances, posing a serious threat to the surface water and groundwater environment. In response to this challenge, GB/T 33815-2017 came into being, filling the technical gap in wastewater treatment for iron ore mining and dressing enterprises.
The formulation of this standard not only complies with the requirements of national environmental protection policies, but also provides scientific technical guidance for enterprises, promoting the industry to develop in a green and sustainable direction. Through the principles of source control, classified treatment and recycling, it helps enterprises achieve a win-win situation of economic and environmental benefits.
2. Wastewater classification and treatment principles
| Wastewater type | Source | Main pollutants | Treatment requirements |
|---|---|---|---|
| Mining wastewater | Drainage water generated by open-pit mining and underground mining, and wastewater discharged from waste rock dumps | Suspended solids, acidic substances | Classified collection and quality-based treatment, with priority given to reuse in mining and dressing production or external supply |
| Mineral processing wastewater | Tailing water generated in the mineral processing process | Suspended solids, chemical oxygen demand (COD) | Reuse in mineral processing production, overflow water from tailings pond needs to be treated before reuse or discharge |
| Acidic mine wastewater | Acidic hydrolysis products caused by mining activities | Heavy metals, acidic substances | Source control, emergency treatment, ensure that discharge meets the requirements of GB 28661 |
| Domestic sewage from mines | Sewage generated by the life of enterprise staff | Organic pollutants | Treatment in regulating ponds, biochemical decontamination, priority reuse or connection to municipal pipe network |
3. Comparison of standard frameworks and technological evolution
Compared with GB 28661 “Emission Standard of Pollutants for Iron Ore Mining and Dressing Industry”, GB/T 33815-2017 has achieved technical upgrades in the following aspects:
- Refine treatment requirements:From pretreatment to deep treatment, the technical parameters and process design of each link are clarified.
- Introduce the concept of resource utilization:Emphasis on the resource utilization of sewage reuse and sludge disposal to reduce fresh water consumption.
- Strengthen risk management:Added emergency treatment system requirements to ensure environmental safety under extreme conditions such as heavy rain.
4. Implementation recommendations
(1) Source control and classification management
Enterprises should establish a complete wastewater classification collection system based on actual conditions. For acidic wastewater, the pollutant concentration can be reduced through source control measures (such as the use of anti-seepage materials and reducing drainage). At the same time, it is recommended to monitor water quality regularly to ensure that the treated reused water meets production requirements.
(2) Process optimization and technological innovation
In terms of treatment technology, the following measures are recommended:
- Wastewater from magnetic separation process: remove suspended solids by graded sedimentation and reuse in grinding or separation.
- Wastewater from flotation process: add biological oxidation units to reduce the chemical oxygen demand index.
- Treatment of acidic wastewater: use lime neutralization or calcium carbide slag neutralization to control the pH value between 6 and 9, and reduce the consumption of reagents by sludge return.
(3) Sludge disposal and resource utilization
The sludge generated during the treatment process should be disposed of in a standardized manner and can be transported to the tailings pond or transported out after mechanical dehydration. For enterprises with conditions, they can explore ways to comprehensively utilize sludge, such as using it as a building material or fertilizer.
5. Conclusion
The implementation of GB/T 33815-2017 Technical Specification for Wastewater Treatment in Iron Ore Mining and Dressing Enterprises will effectively promote the improvement of the industry's environmental protection level and provide technical support for enterprises to achieve sustainable development goals. In the future, with the further strengthening of environmental protection policies and technological advances, wastewater treatment in the iron ore mining and dressing industry will develop in a more intelligent and resource-based direction.
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