Development Of Acid-resistant Steel And Application Of Gas Holder

In order to store gas and save energy,iron and steel enterprises and other large quantities of converter gas,which are produced in the production process,have been developing rapidly in recent years.As an important part of the converter gas recovery system,converter gas cabinet plays a key role in gas distribution and voltage regulation.Because the steel structure in the converter gas cabinet is prone to corrosion in special environment,especially the bottom plate and side of the cabinet.The corrosion of the board is particularly serious,and there are many corrosion holes,which cause air leakage in many places in the converter gas cabinet.The converter gas is a dangerous medium that is flammable,explosive and easy to poison.Once a leak occurs,it is easy to cause an explosion and a fire accident,which seriously threatens the safe production and causes huge losses.Therefore,the steel used in the gas cabinet needs to have strong acid resistance and corrosion resistance.This topic combines the actual problems of Hegang Tangshan Steel to develop sulfuric acid dew point corrosion resistant steel for gas cabinets,and can be applied to air preheaters,heat exchangers and evaporators to resist condensation corrosion of sulfurcontaining gas.It has improved the service life and production efficiency of equipment in the power petrochemical field,in line with the national requirements for energy conservation,emission reduction and green production,with good economic benefits and market prospects.The specific content of this subject is to determine the production process of acidresistant steel according to the process characteristics of the company’s thin slab production line and the steel grade characteristics of acid-resistant steel.And from simple to difficult,first test the Q315 NS with a lower grade,and then test the acid-resistant steel 09 CrCuSb steel.By optimizing the smelting process,reducing the content of S,P,O and N in the steel and improving the purity of the molten steel;ensuring the smoothness of the continuous casting process and the stability of the hot rolled coil by the precise control of the chemical composition and temperature;Optimized high-temperature performance of secondary slag,secondary cooling strength,good quality defect-free continuous casting billet;optimized slab heating system,rolling mill load distribution,and controlled rolling and controlled cooling process,producing good shape,high dimensional accuracy,mechanics High-quality acid-resistant steel hot-rolled coils with stable performance and excellent surface quality to meet relevant standards and user requirements,and applied to the company’s internal equipment.By expanding the steel varieties,the advantages of Tangshan Steel’s 1700 medium and thin slab continuous casting and rolling are exerted,and the quality is not lower than the conventional slab,eliminating the internal segregation of the continuous casting billet,reducing the energy consumption of the whole process,and making up for the acid production of the traditional process.Insufficient steel.Acid-resistant steel will become a high value-added product of Hegang Tangshan Steel Co.,Ltd.,and make a major breakthrough in the service life of Hegang Tangshan Steel’s flue or gas cabinet.Figure 46;Table 22;Reference 43...