GB 50408-2015 English PDFGB 50408: Historical versions
Basic dataStandard ID: GB 50408-2015 (GB50408-2015)Description (Translated English): Code for design of sintering plant Sector / Industry: National Standard Classification of Chinese Standard: P73 Classification of International Standard: 77.020 Word Count Estimation: 105,184 Date of Issue: 2015-02-02 Date of Implementation: 2015-10-01 Older Standard (superseded by this standard): GB 50408-2007 Quoted Standard: GB 50009; GB 50011; GB 50016; GB 50019; GB 50191; GB 50414; GB 50632; GB 5749; GB/T 16157; GB/T 21368; GB 28663; HJ/T 426; HJ/T 427; HJ/T 428; HJ/T 397 Regulation (derived from): Ministry of Housing and Urban-Rural Development Announcement No.738 Issuing agency(ies): Ministry of Housing and Urban-Rural Development of the People's Republic of China; General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Summary: This Standard applies to all types of iron ore sintering plant new construction and renovation design. GB 50408-2015: Code for design of sintering plant---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.1 General 1.0.1 This specification is formulated to ensure the design quality of sintering engineering, realize advanced technology, reasonable economy, safety and applicability, energy saving and emission reduction, and recycling. 1.0.2 This code is applicable to the new construction and reconstruction design of various types of iron ore sintering plants. 1.0.3 The design of the sintering plant shall not only comply with this specification, but also comply with the current relevant national standards. 2 terms 2.0.1 Raw materials Refers to iron-containing raw materials, which is the general term for iron powder ore, iron concentrate and other iron-containing materials used in sintering. 2.0.2 Flux flux Limestone, dolomite, serpentine, quicklime, slaked lime, lightly burned dolomite powder, magnesite and other alkaline substances and silica sand and other silicon-enhancing fluxes. 2.0.3 fuel The general term for coke powder, anthracite and gas. Coke powder and anthracite are also called solid fuels. 2.0.4 blending yard The place where raw materials are prepared, stacked, mixed and stored. 2.0.5 Blended ores Raw materials with different physical and chemical properties are pre-mixed, stacked and mixed to achieve the expected uniform physical and chemical properties. 2.0.6 Sintering sintering Iron-containing raw materials are added with flux and solid fuel, mixed according to the required ratio, mixed with water and granulated, then spread flat on the sintering machine trolley, and sintered into blocks by ignition and ventilation. 2.0.7 Utilization coefficient sintering machine productivity The hourly output of finished sintered ore per unit sintering area, expressed in t/(m2·h). 2.0.8 Automatic weight proportioning The method for automatically adjusting the given amount of various materials according to the weight ratio of the required iron-containing raw materials, flux, solid fuel, etc. 2.0.9 fuel points plus divided fuel addition The method in which solid fuel is added to the mixture separately in the batching chamber and after granulation. 2.0.10 Mixture Ferrous material, flux, solid fuel and added water are mixed and pelletized. 2.0.11 hearth layer A layer of underlayment that is laid before sintering the trolley cloth. 2.0.12 bed depth During production, the sum of the thickness of the mixture on the sintering machine trolley and the thickness of the bottom layer. 2.0.13 Permeability of material layer The mixed material spread on the sintering machine, under the condition of certain material layer thickness and negative pressure, the air volume passing per minute per unit sintering area. 2.0.14 minipellet sintering A method of sintering the mixed material into pellets larger than 3mm and accounting for more than 75%. 2.0.15 Low temperature sintering Sintering at a temperature lower than 1280°C produces a sintering method in which acicular calcium ferrite with high strength and good reducibility is the main binder phase. 2.0.16 hot air sintering hot gas sintering The method of introducing the hot waste gas of the cooling machine into the sealing cover of the sintering machine behind the ignition furnace for sintering. 2.0.17 sinter cake The material formed after sintering is completed. 2.0.18 hot return fines After the sintered cake is crushed and sieved by hot ore, the undersize with a particle size of less than 5mm is obtained. 2.0.19 off-strand cooling After the sinter cake is broken, it is cooled in the cooler outside the sintering machine. 2.0.20 on-strand cooling The cooling of the sintered cake on the sintering machine. 2.0.21 Whole grain sinter sizing of sintered ore After the sinter is cooled, it is screened and granulated, and the finished sinter, the bottom material for sintering and the process of returning ore are separated into the finished sinter within the particle size range required by the blast furnace. 2.0.22 cold return fines After the sinter is cooled, the returned ore with a particle size of less than 5mm is separated by screening and sizing. 2.0.23 High basicity sinter high basicity sinter Sintered ore with an alkalinity (CaO/SiO2) of 1.7 or higher. 2.0.24 burden design The composition of the iron-containing charge loaded into the blast furnace during blast furnace ironmaking, that is, the combination of various charge materials such as lump ore, sintered ore and pellet ore. 2.0.25 main electrical building Set up workshops for power transformation and distribution equipment and automatic control equipment. 2.0.26 main control room The center for centralized operation, monitoring, production organization and command and control of production process and equipment. 2.0.27 waste heat recovery The process of recycling the hot waste gas and other heat generated in the sintering and cooling process. 2.0.28 Sintering process of flue gas re-circulation A sintering process that returns part of the hot flue gas generated during the sintering production process to the sintering material surface for reuse. 3 Basic Regulations3.0.1 The design of the sintering plant should have sufficient design basis and complete design basic data and environmental impact assessment report. 3.0.2 The site of the sintering plant should be selected within the iron and steel company and close to the blast furnace and the raw material mixing yard, and the topography, engineering geology, hydrology, earthquake, environmental protection and historical flood elevation, meteorology, nature, ecology and society should be considered Factors such as economic environment, industrial traffic, regional economy, and production requirements of steel companies. 3.0.3 The layout of the general plan of the sintering plant should be smooth and compact, use the terrain, save land, reduce the amount of earth and stone, and determine whether to reserve room for development according to the planning needs. 3.0.4 The determination of the scale of the sintering plant should be based on the availability of raw materials, according to the company's development plan and blast furnace charge structure requirements for the quantity and quality of sintering ore, and should consider the surplus capacity. 3.0.5 The scale division of sintering machine should meet the following conditions. 1 Large. the use area of a single sintering machine is equal to or greater than 360m2; 2 Medium-sized. the use area of a single sintering machine is equal to or greater than.200m2 and less than 360m2; 3 Small. the use area of a single sintering machine is equal to or greater than 180m2 and less than.200m2. 3.0.6 The usable area of a single sintering machine in a newly built and renovated sintering plant shall not be less than 180m2. 3.0.7 Large and medium-sized sintering machines should adopt belt-type sintering machines. 3.0.8 The sintering test shall meet the following requirements. 1.For commonly used iron-containing raw materials, only the sintering cup test is carried out, including the optimization ore blending test, etc.; if there are tests or production data with similar conditions, the test may not be carried out; 2 For complex or unpracticed iron-containing raw materials and special process flow, it is advisable to conduct semi-industrial or industrial tests on the basis of sintering pot tests. 3.0.9 The utilization factor of the sintering machine shall meet the following requirements. 1 When the content of fine iron ore is equal to or greater than 70%, the utilization coefficient of the sintering machine should be equal to or greater than 1.35t/(m2 h); 2 When the iron concentrate content is greater than 50%, the utilization factor of the sintering machine should be equal to or greater than 1.25t/(m2 h); 3 When using vanadium-titanium ore, limonite, and siderite as raw materials, it should be determined through tests or actual production indicators. 3.0.10 The working system of the sintering plant shall be designed according to the continuous working system. 3.0.11 The calendar operating rate of the sintering plant should be 92% to 95%. 3.0.12 The design of the sintering plant shall adopt advanced, safe, reliable, energy-saving and environment-friendly equipment. The specifications and performance of auxiliary equipment should be compatible with the production scale. 3.0.13 It is strictly forbidden to use second-hand sintering production equipment eliminated at home and abroad. 3.0.14 When carrying out the design of the sintering plant, waste heat recovery and desulfurization design must be carried out at the same time. 3.0.15 When designing the sintering plant, it is advisable to carry out the denitrification design at the same time, and it should meet the requirements of the national nitrogen oxide emission standard. 3.0.16 The sintering plant design should not select sintering raw materials that are likely to produce dioxin substances during the sintering process. 4 Raw materials, fluxes, fuels and their preparation 4.1 Conditions for entering raw materials, fluxes and fuels 4.1.1 Raw materials entering the sintering plant shall meet the following conditions. 1.The particle size of iron-containing raw materials should be 8mm-0, and the particle size of rolled steel and steel slag should be less than 8mm and 5mm respectively; the particle size requirements of special iron powder ore and iron concentrate should be determined according to the test; 2 The iron-containing raw materials should be mixed evenly, and the allowable deviation of the mixed ore iron grade fluctuation should be ±0.5%; the allowable deviation of SiO2 fluctuation should be ±0.2%; 3 The moisture of magnetite concentrate should be less than 10%, and the moisture of hematite concentrate should be less than 11%. 4.1.2 The flux entering the sintering plant should meet the following requirements. 1 The particle size of limestone should be 80mm-0, the CaO content should not be less than 52%, the SiO2 content should not be greater than 2.2%, and the moisture should be less than 3%; 2 The particle size of quicklime should be less than or equal to 3mm, and the CaO content should be equal to or greater than 85%; 3 The particle size of slaked lime should be less than or equal to 3mm, the moisture should be 18%-20%, and the CaO content should be equal to or greater than 60%; 4 The particle size of dolomite should be 80mm-0, the moisture should be less than 4%, the MgO content should be equal to or greater than 19%, and the SiO2 content should be less than or equal to 3%; 5 The particle size of serpentine should be 40mm~0, the moisture should be less than 5%, and the (CaO+MgO) content should be greater than 35%; 6 The particle size of lightly burned dolomite powder should be 3mm-0, the CaO content should be equal to or greater than 52%, the MgO content should be equal to or greater than 32%, and the SiO2 content should be less than or equal to 3.5%; 7 The particle size of magnesite should be 80mm-0, the moisture should be less than 4%, the MgO content should be equal to or greater than 19%, and the SiO2 content should be less than or equal to 3%. 4.1.3 The fuel entering the sintering plant shall comply with the following regulations. 1 The coke particle size should be 25mm-0, the fixed carbon content should be greater than 80%, and the moisture should be less than 12%; 2 The particle size of anthracite should be 40mm-0, the moisture should be less than 10%, the ash content should be less than 15%, the volatile matter should be less than 5%, the S should be less than 1%, and the fixed carbon should be more than 75%; 3 Coke oven gas, natural gas, converter gas, blast furnace gas or other gaseous fuels should be used as fuel for sintering ignition. When coke oven gas, natural gas, converter gas and mixed gas are used as ignition fuel, the gas pressure near the sintering cooling chamber should not be lower than 4000Pa; when blast furnace gas is used as ignition fuel, the gas pressure near the sintering cooling chamber should not be lower than 7000Pa. The dust content of all kinds of gas should be less than 10mg/m3. 4.2 Receipt and storage of raw materials, fluxes and solid fuels 4.2.1 When there is a mixing yard in the raw material yard, the sintering plant should not set up a raw material warehouse. 4.2.2 In areas with heavy rain, typhoons or severe freezing, the mixing yard should be set up indoors. 4.2.3 Large and medium-sized sintering machines should use a dumper for receiving bulk materials; for small batches of materials such as rolled steel sheets, a receiving trough should be used, and a mechanized unloading device should be installed. 4.2.4 Grab bridge crane unloading method should not be used for unloading. 4.2.5 When transported by car, a special car receiving trough can be set up. 4.2.6 The dumper room and the underground building part of the material receiving chute shall be provided with waterproof, drainage, ventilation and dust removal facilities. 4.2.7 The raw materials mixed in the stockyard should be sent directly to the sintering batching tank by the belt conveyor. Quicklime and lightly burned dolomite should be transported to the batching room by sealed tank trucks and sent to the batching tank by pneumatic conveying. When the quicklime roasting plant is adjacent to the sintering plant, the quicklime can be directly sent to the sintering batching tank by pneumatic conveying. 4.2.8 When limestone, dolomite and solid fuel are processed in the sintering plant, flux tanks and fuel tanks should be installed. The storage time should be 3d~5d when there is a dedicated transportation line, and 5d~7d if there is no dedicated transportation line. The storage time of flux and fuel in the stockyard should be 7d~10d. If there is a special conveyor belt from the stockyard to the sintering plant, the storage time in the sintering plant should not be less than 12h. 4.2.9 The raw material receiving and storage system in northern regions should be equipped with anti-freezing and thawing facilities. 4.3 Preparation of flux and solid fuel 4.3.1 Solid fuel crushing and screening should be located in the sintering plant, and limestone and dolomite should be purchased as finished products. 4.3.2 When limestone and dolomite need to be crushed in the sintering plant, a closed-circuit crushing and screening process should be adopted. 4.3.3 The final particle size of limestone and dolomite in the ingredients should be more than 90% less than 3mm, and the content greater than 5mm should be less than 5%. 4.3.4 When the particle size of crushed coke is 25mm to 0, a two-stage open-circuit crushing process should be adopted. When the particle size is less than 10mm, the moisture content is less than 10%, and the coke content of the particle size less than 3mm accounts for more than 30%, pre-screening and one-stage open-circuit crushing process can be used. When the particle size is greater than 25mm and the particle size content accounts for more than 10%, pre-screening can be used to separate out large pieces, and then the second-stage open-circuit crushing process can be used. 4.3.5 For the crushing of anthracite, the two-stage open-circuit crushing process can be adopted according to the specific conditions such as particle size and moisture. When the particle size of less than 3mm accounts for more than 30% and the moisture content is less than 10%, a pre-screening process can be added before the primary crushing. 4.3.6 When iron concentrate powder is used, the final particle size of crushed coke and anthracite processing less than 3mm should account for more than 85% and 75% respectively. When all imported fine ore is used, crushed coke and anthracite whose final particle size is less than 3mm should account for more than 75% and 65% respectively. 4.3.7 Solid fuels of different varieties or with large differences in physical and chemical properties should be broken separately. 4.3.8 The crushing of solid fuel shall avoid the use of crushing equipment that is prone to over-crushing. 4.3.9 Limestone, dolomite and solid fuel should be equipped with iron removal device before crushing.5 Sintering process5.1 Process flow 5.1.1 The sintering process should be based on the principles of stable production process, excellent product quality, comprehensive utilization of resources, energy saving and emission reduction, safe and clean production, and environmental friendliness, and should be based on the scale, raw materials, fuel and flux conditions and transportation acceptance methods, Product plan, internal logistics and its transportation mode, test conclusion, equipment manufacturing situation, routine maintenance, etc. are determined. 5.1.2 The hot ore sintering process is strictly prohibited. 5.2 Ingredients 5.2.1 The number of batching series should be determined one-to-one with the sintering machine. 5.2.2 Raw materials, fluxes and solid fuels should be batched automatically by weight. 5.2.3 The batching trough should be able to store the amount used for more than 8 hours. 5.2.4 The number of batching troughs should be determined according to the batching amount and the capacity of the batching equipment. The main iron-containing raw materials should not be less than 3 grids, and the auxiliary raw materials should be 2 grids for each type. For small batching volumes, 1 grid and two cuttings can also be used. mouth. 5.2.5 The main iron-containing raw materials and low-viscosity materials should be batched first, and the fuel should not be batched first. 5.2.6 Sintering and blast furnace return should be prepared separately. 5.2.7 Quicklime or slaked lime should be added as a flux in the ingredients; the amount to be added should be determined according to the specific conditions such as raw material conditions and test conclusions. 5.2.8 The setting of quicklime digestion facilities shall be determined according to raw material conditions, test conclusions, environmental protection requirements, quicklime dosage and mixing and granulation time adopted. 5.2.9 When the recovered dust is concentrated in the batching process, it is advisable to humidify the dust. 5.3 Adding water, mixing and granulating 5.3.1 Two-stage mixing should be used when iron powder ore is used as the main raw material. When the iron concentrate is used as the main raw material, if the ball sintering method is adopted, three times of mixing can be set to roll out the solid fuel. 5.3.2 When a cylinder mixer is used, the total mixing and granulation time should be 5 minutes to 9 minutes. When iron powder ore is used as the main raw material, the lower limit should be taken; when iron ore concentrate is used as the main raw material, the granulation time including solid fuel rolling out should be taken as the upper limit. 5.3.3 The filling rate of the cylinder mixer should be 10% to 16% for the primary mixer, and 9% to 15% for the secondary mixing (granulation) machine. 5.3.4 The primary cylinder mixer and the secondary cylinder mixer should be installed on the ground. 5.3.5 The drum mixer and feeding belt conveyor should be configured in parallel. 5.3.6 Medium and small sintering machines should be installed on the high-rise platform of the sintering cooling room. 5.3.7 The particle size of the rolled coal should be less than 3mm. 5.3.8 Adding water to the mixture should be automatically detected and controlled. 5.3.9 The mixture should be heated, and the heating medium can be hot water or steam. Hot water should be added to the mixer and......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB 50408-2015_English be delivered?Answer: Upon your order, we will start to translate GB 50408-2015_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB 50408-2015_English with my colleagues?Answer: Yes. The purchased PDF of GB 50408-2015_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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