Standard ICS number:Environmental protection, health and safety>>>>13.060.30 Wastewater
Standard Classification Number:Environmental Protection >> Pollutant Emission Standards >> Z61 Mining Areas, Raw Materials and Other Industrial Pollutant Emission Standards
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
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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 chromiumwwW.bzxz.Net 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 6~9 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. 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