1 Introduction1.1 OutlineThe design reference Baosteel sintering plant, according to the design requirements of the mission statement, the design production capacity of 300 tons, the sintering plant products of high quality for blast furnace sinter.Because annular cooler temperature exhaust gas discharged with the airflow and fine dust released into the air, allowing more serious environmental pollution, while a large number of hot exhaust gas into the atmosphere, waste heat, dust and heat in order to reduce emissions, reduce pollution of the environment, the design of the ring after a hot exhaust gas cooler dust stove and holding furnace used for point after.The design of the sintering engineering technology, equipment level and the degree of automation and, basically, Baosteel sintering plant rather, is the worlds advanced level, the design of a complete process: thick material layer sintering, centralized dust removal system, dual diagonal band spot stove, the addition of a ring cooler holding furnace and hot exhaust gas emissions as a promoter, these are the sintering process technology and equipment constitute the main content, but also an important indicator of the level of todays world.1.2 Design basis and design principles1.2.1 Design basisThis design is the Central South University of Resources Processing and Bioengineering pellets Professional 2013 session of the graduate design task, entitled “Design sinter plant of an annual output of 3 million tons of sinter“ which combined in Baosteel graduation internship process field data collected and the master site processes and equipment prepared on the basis of.1.2.1 Design principlesIn order to do this sinter plant design, intended to the following design principles:1) According to todays world sintering technology, combined with the actual situation of Baosteel, determine the design process technology and equipment level.2) reasonably compact device configuration, production workshop has sufficient operating area to ensure smooth material transport facilities.3) selection of equipment, construction to achieve standardization and universal.4) Take effective measures to reduce the sinter plant dust pollution.5) Consider the possibility of future expansion.1.3 Design rangeThe design of the sintering project include the following:1) coke crushing and screening system.2) ingredients mixed system.3) sintering and cooling system.4) the main electrical room.5) finished crushing and screening system.6) the dust handling system.32 Iron-containing materials, flux, fuel2.1 iron-containing materialsThe design of the sintering plant iron raw materials including imported iron ore , national concentrates.Imported iron ore is a high iron low silicon raw materials, mainly from India, Brazil, Australia and other importing countries. Imported Materials ore from the steamer pier, transported by belt conveyor to the raw material yard, through Neutralization and mix on the yard, then by belt conveyor to the dosing chamber, Sintering plant mainly recyclable materials is iron by the belt conveyor to the field and mixed with other Materials Materials , to pre-dosing effect. Iron-containing materials in the yard after mixing , directly to the dosing chamber.2.1.1 Chemical composition of iron-containing materials The chemical composition of iron-containing materials into the plant in Table 2-1.2.1.2 The requirements Size and grade1) the size requirements: Fines requirements, should be shot mix stockyard and, if possible together with the steel plant was built in order to achieve sintering, pelletizing plant feed ingredients stable, uniform size. For medium and small sintering plant should also be set up according to the specific conditions of mixing facilities; raw single species, grade fluctuation is small, or not to set mixing facilities. But it should be built by the mining of raw materials warehouse and warehouse and so on. There blending stockyard, the sintering plant should no longer raw materials warehouse. But in wet areas should be located indoor storage facilities.Medium-sized sinter plant material should be adopted by the dumper. Dumper is a large unloading equipment, which is widely used in large and medium-sized and some large sintering plant sinter plant. It has the unloading of high efficiency, large capacity, suitable for all kinds of bulk material unloading turn. Because high degree of mechanization, is conducive to automated or semi-automated unloading operations.9By mine shafts is used only by the material and not for storage facilities. Generally used for steel mills to accept bulk materials and auxiliary materials. By mine chute design should consider the use of mechanized equipment. Small mines can be spiral unloading machine or a chain-head unloading machine to accept raw materials. Most of the raw materials warehouse sintering plant designed to stabilize production, raw materials warehouse storage time of various materials as follows: iron-c