This standard stipulates the wastewater discharge per ton of products and the maximum allowable discharge concentration of major pollutants by steel companies according to the production process and wastewater discharge destination. This standard applies to enterprise emission management in the steel industry, as well as environmental impact assessment, design, completion acceptance and post-completion emission management of construction projects. GB 13456-1992 Water Pollutant Discharge Standard for the Iron and Steel Industry GB13456-1992 Standard download and decompression password: www.bzxz.net

National Standard of the People's Republic of China
Discharge standard of water pollutants for iron and steel industry
GB 13456-92
Replaces GB4911-85 degree water part and
GB897888 iron and steel industry part
This standard is formulated to implement the "Environmental Protection Law of the People's Republic of China", "Water Pollution Prevention and Control Law of the People's Republic of China", "Marine Environmental Protection Law of the People's Republic of China", promote the progress of production technology and pollution control technology, and prevent and control water pollution. 1 Subject content and scope of application
1.1 Subject content
This standard specifies the wastewater discharge per ton of product and the maximum allowable emission concentration of major pollutants of steel enterprises according to the production process and wastewater discharge destination.
1.2 Scope of application
This standard applies to the enterprise emission management of the steel industry, as well as the environmental impact assessment, design, completion acceptance and post-construction emission management of construction projects.
2 Reference standards
GB3097
GB3838
GB4918
GB4919
GB6920
GB7467
GB7472
GB7475
GB7478
GB7479
GB7481
GB7487
GB7490
GB7491
GB8978
GB11901
Seawater quality standards
Surface water environmental quality standards
Industry Determination of total nitro compounds in industrial wastewaterSpectrophotometric methodDetermination of total nitro compounds in industrial wastewaterGas chromatographyWater qualityDetermination of pH valueGlass electrode method
Water qualityDetermination of hexavalent chromiumDiphenylcarbazide spectrophotometric methodWater quality
Water quality
Water quality
Water quality
Water quality
Water quality
Water quality
Water quality
Determination of zincDithiol spectrophotometric method
Determination of copper, zinc, lead and cadmiumAtomic absorption spectrophotometryDetermination of ammoniumDistillation and titration method
Determination of ammonium
Nessler's reagent colorimetric method
Salicylic acid spectrophotometric method
Determination of ammonium
Cyanide Determination of volatile substances Part II: Determination of cyanide Determination of volatile phenols
4-aminoantipyrine spectrophotometric method after distillation Determination of volatile phenols
Integrated sewage discharge standard
Water quality
GB11914
3 Technical content
3.1 Process classification
Water quality
Bromination volumetric method after distillation
Determination of suspended solids Gravimetric method
Determination of chemical oxygen demand Dichromate method
National Environmental Protection Week Approved on May 18, 1992 and implemented on July 1, 1992
GB13456-92
This standard is based on the production process of the steel industry and is combined with The products of the combined production are divided into the following 8 categories and 15 types: a.
b.
c.
d.
e.
f.
g.
h.
Ore dressing: gravity separation and magnetic separation (excluding flotation plants); sintering: sintering and pelletizing;
Coking: coking plants including chemical products; ironmaking: ironmaking plants (referring to ordinary iron);
Steelmaking: converter steelmaking and electric furnace steelmaking:
Continuous casting: continuous casting plants (workshops);
Steel rolling: steel bars, steel sections, wire rods, hot-rolled plates and strips, steel pipes and cold-rolled plates and strips; Iron and steel joint ventures: refers to steel enterprises with basic balance of sintering, coking, ironmaking, steelmaking and rolling. 3.2 Standard classification
This standard is divided into three levels.
3.2.1 Wastewater discharged into Class IⅡI waters (except water protection areas) in GB3838 and Class II sea areas in GB3097 shall comply with Class I standards. 3.2.2 Wastewater discharged into Class IWV and Class V waters in GB3838 and Class III sea areas in GB3097 shall comply with Class II standards. 3.2.3 Wastewater discharged into urban sewers with secondary sewage treatment plants shall comply with Class III standards. 3.2.4 Wastewater discharged into urban sewers without secondary sewage treatment plants shall comply with the provisions of 3.2.1 and 3.2.2 respectively according to the functional requirements of the receiving water area of ??the sewer effluent. 3.2.5 In water protection areas in Class I and Class IIII waters in GB3838 and Class I sea areas in GB3097, it is prohibited to build new sewage outlets, and expansion and reconstruction projects shall not increase the amount of sewage discharged. 3.3 Standard values
This standard specifies the minimum allowable recycling rate of wastewater in the iron and steel industry, the maximum allowable discharge volume per ton of product, and the maximum allowable discharge concentration of water pollutants according to different years.
3.3.1 Iron and steel industry construction projects approved before January 1, 1989 and enterprises put into production after completion shall comply with Table 1. Table 1
Maximum allowable discharge concentration of pollutants, mg/LIndustry category
Metallurgical system
Ore dressing
Steel, ferroalloys,
Steel and iron and steel joint enterprises
(excluding ore dressing plants)1
Classification
First level
Second level
Third level
First level
Second level
Third level
Minimum allowable water
recycling rate
Large 、Medium (75%)
Small (60%)
Water-deficient area3 (85%)
Water-rich area* (60%)
PH value
vo
6~
9
Suspended matterVolatile phenol
150
400
150
300
400
Note: 1) Including enterprises with independent production process and independent external discharge outlet. 1.0
1.0
2.0
1.0
1. 0
2.0
Cyanide
0.5
0.5
1. 0
0.5
0.5
1.0
Chemical Oxygen Demand
(CODc)
150
200
500
150
200
500
2) Water-rich areas: The water sources are taken from the Yangtze River, Yellow River, Pearl River, Xiang River, Songhua River and other large rivers as water-rich areas; Oil
15
20
30
15
20
30
Water-scarce areas: The water sources are taken from reservoirs, groundwater and areas determined as water-scarce by the national water resources administrative department as water-scarce areas. Hexavalent chromium
0.5
0.5
Total nitrobenzene
Compounds
3.0
5.0
3.3.2 For steel industry construction projects approved between January 1, 1989 and June 30, 1992 and for enterprises that went into production after completion, the implementation shall be in accordance with Table 2.
Industry category
Ferrous
Metallurgical system
Ore dressing
Steel and iron processes, ferroalloys, steel joint ventures
(excluding ore dressing plants)1
Classification
First level
Second level
Third level
Third level
Minimum allowable
Water recycling rate
90%
Water-scarce areas\(90%)
Water-rich areas\(80%)
GB13456-92
Table 2
Maximum allowable emission concentration of pollutants, mg/L Chemical demand
pH value
6～9
6～9
Suspended matter Volatile phenols Ratified substances Oxygen
Content
(COD)
70
300
400
70
200
400
Note: 1) Including enterprises that produce with a separate process and have their own separate external discharge outlet. 2) The nitrogen index for coking will be implemented on January 1, 1994. 0.5
0. 5
2. 0
0.5
0.5
2.0
0. 5
0.5
1.0
0.5
0.5
1.0
100
150
500
100
150
500
3) Fengshui area: water sources are taken from the Yangtze River, Yellow River, and Pearl River , Xiangjiang River, Songhua River and other large rivers and rivers are flood-rich areas: oil
10
10
30
10
10||tt| | 30 | The area is a water-scarce area. The iron and steel industry construction projects initiated on July 1, 1992 and the enterprises put into operation after completion shall be implemented according to Table 3. 3.3.3
Table 3
Discharge 1
Production
T Technology
Ore Processing
b
Sintering|| tt||c
Coking
d
Ironmaking
Classification
Grading
Level 1
Heavy and magnetic Select
Level 3
Level 3
Level 1
Sintering
Pellets
Coking*
Ironmaking| |tt||Level 3
Level 3
(m\/t product) 2)
Water shortage
District
.0.7||tt ||0.01
Level 2
0.005
Level 2
Level 3
Level
Level 2
Level 3
First level
Second level
Lan level
3.0
(7)
3.0
Fengshui|| tt||area
0.7
OH value
6~9
6~9
0.01
0.0056~9||tt ||4.0
6~9
(7)
10.0
6~9
suspended solids
(mg/L)
70
300
400
70
150
400
70
150|| tt||400
70
150
400
70
150
400
Volatile phenol||tt ||(mg/L)
0.5
0.5
2.0
rat compounds
(mg/L.)
0.5| |tt||0.5
1.0
Chemical requirements
Oxygen
Amount
(CODcr)
(mg/L)|| tt||100
150
500
Oils
Hexavalent Chromium
(mg/L)
(mg/L )
8
10
30
zinc
2.0
4.0
5.0
2.0| |tt||4.0
5.0
nitrogen nitrogen
(mg/L)
15
25
40||tt| |Nitrogen
15.0
40.0
150
Zinc
(mg/L)
2.0
4.0| |tt||5.0
Production
Technology
e
Steelmaking
f
Continuous casting
g| |tt||Steel rolling
h
United
Enterprise
Classification
Converter
Electric furnace
Joint financing|| tt||steel bad
shaped steel
wire rod
hot rolled
plate and strip
steel pipe
cold rolled
plate Belt
Steel Alliance
Joint Enterprise
Grading
First Class
Second Class
Level Three
First Class| |tt||Level 2
Level 3
Level 1
Level 2
Level 3
Level 1
Level 2|| tt||Level 3
Level 1
Level 3
Level 3
Level 1
Level 2
Level 3||tt ||Level 1
Level 2
Level 3
Level 1
Level 2
Level 3
Level 1||tt| |Level 2
Level 3
Level 1
Level 2
Level 3
Displacement 1)
(m/t product) 2)
Water shortage
District
1.5
1.2
1.0
1.5
3.0
2.5
4.0
4.0
3.0
10
Fengshui
District"
5.0
5.0
2.0
3.0
6.0
4.5
pH value
6～9
6～9|| tt||6~9
6~9
6~9
6~9
6~9
8.0
10.0
169
6.8
20
6~9www.bzxz.net
6~9
GB13456—92
Continued Table 3
suspended solids
(mg/L)
70
150
400
70
150||tt ||400
70
150
400
70
150
400
70
150
400
70
150
400
70
150
400
70| |tt||150
4.00
70
150
400
70
150
400||tt ||Volatile phenol
(mg/L)
0.5
0.5
2.0
Cyanide
(ng/L)| |tt||0.5
0.5
1.0
Chemistry requirements
Wearing amount
(COD&)
(mg/L)| |tt||100
150
500
Note: 1) Due to agricultural irrigation needs, the amount of water allowed to be discharged is not included in the law enforcement indicators. Oils
(mg/L)
9o
10
30
8
10
30|| tt||8
10
30
10
30
10
30
8||tt| |10
30
8
10
30
Hexavalent chromium
(mg/L)
0.5
0.5
1.0.
0.5
0.5
1.0
ammonia nitrogen
(mg/L)||tt ||10
25
40
Zinc
(mg/L.)
2. 0
4.0||tt| |5.0
2) Ore dressing is raw ore, sintering is sinter, coking is coke, iron-making is pig iron, steel-making is crude steel, continuous casting is steel bad, steel rolling is steel, steel complex enterprise||tt| |
J
GB13456-92
3) Water-rich areas: water sources are taken from the Yangtze River, Yellow River, Pearl River, Xiangjiang River, Songhua River and other large rivers and rivers, which are rich-water areas; water shortages Areas: Areas whose water sources are taken from reservoirs, groundwater, and areas determined to be water-scarce by the national water resources administrative department are water-scarce areas. 4) Use groundwater as the cooling medium, and the drainage index is 7m/t product (no chilled water is used). The coking nitrogen index was implemented on January 1, 1994 (there are no values ??in the blank columns of the table).
4 Monitoring
4.1 Sampling point
The sampling point should be at the enterprise's wastewater discharge outlet (hexavalent chromium is sampled at the outlet of the workshop or workshop treatment facility), and the discharge outlet should be set up with wastewater volume measurement Installations and permanent signs.
4.2 Sampling frequency
The sampling frequency should be determined according to the production cycle. If the production cycle is within 8 hours, the monitoring frequency will be collected once every 2 hours; if the production cycle is greater than 8 hours, the monitoring frequency will be collected once every 4 hours. The maximum allowable discharge concentration of wastewater pollutants is calculated based on the daily average value. 4.3 Displacement
Displacement should include production drainage base and indirect cooling water. The allowable drainage volume of wastewater per ton of product is calculated based on the monthly average. 4.4 Statistics
The enterprise's raw material usage, product output, etc. shall be based on the statutory monthly report or annual report. 4.5 Determination
The determination method used in this standard is performed according to Table 4. Table 4
Serial number
1
2
3
1
5
6
7
8
9
Volatile phenols
Fluoride
Item
Chemical Oxygen Demand
Hexavalent Chromium| |tt||Ammonia nitrogen (NHs-N)
pH value
suspended solids
zinc
total nitro compounds
5 standard implementation supervision|| tt | |Isonicotinic acid-pyrazolone colorimetric method
Dichromate method
Diphenylcarbazide spectrophotometric method
Distillation and titration method
Nessler's reagent colorimetry
Salicylic acid spectrophotometry
Glass electrode method
Gravimetric method
Atomic absorption spectrophotometry
Disulfide gland Spectrophotometry
Spectrophotometry
Gas Chromatography
This standard is supervised and implemented by the environmental protection administrative departments of the people's governments at all levels. GB7490
GB7491
GB7487
GR11914
GB7467
GB7478
GB7479
GB7481
GB6920| |tt||GB11901
GB7475
GB7472
GB4918
GB1919
Method standard number
Additional instructions:
GB13456-92
This standard is proposed by the Science and Technology Standards Department of the State Environmental Protection Administration. This standard is sponsored by the General Institute of Construction of the Ministry of Metallurgy, the Beijing General Institute of Iron and Steel Design and Research, the Environmental Standards Institute of the Chinese Academy of Environmental Sciences, and the Chongqing Iron and Steel Design and Research Institute. The institute, Anshan Ferrous Metallurgical Mine Design and Research Institute, and Anshan Coking Refractory Materials Design and Research Institute were responsible for drafting. The main drafters of this standard are Liu Hongming, Zhang Hong, Song Weimin, Teng Jing, Sun Tongjiu, Zhang Qin, Zeng Zhengping, Fu Tieming, Han Yingjian, and Zhang Fengyu. The National Environmental Protection Administration is responsible for interpreting this standard.
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