In this paper, the oxidation and decarbonization as well as formation rule of heterogeneous particles around cracks of web for SS400B hot rolled H beam are studied. The experiment is designed based on the actual working conditions on site as well as oxidation and decarbonization and performance distribution of heterogeneous particles with different processes are analyzed qualitatively and quantitatively with metallographic analysis and energy spectrum. The results showed that there was decarburization around cracks of SS400B hot rolled H beam in the stage of rough rolling, but no heterogeneous particles appeared. It is systematically and comprehensively explained that the oxidation and decarbonization and precipitation of silicon containing heterogeneous particles around cracks are closely related to the composition of steel, process location and thermal regulation combining with domestic study results.

In this article, the current conditions and development tendency of cooling bed in the production line of section steel are introduced. A new type of captation and dewatering installation for spray cooling system is designed to solve the problems in applications of spray cooling technology in production of cooling bed. Its layout and structure are mainly introduced combining with design drawings. It is with such characteristics as lower costs, shorter construction period, easier installation and convenient maintenance. With these characteristics, the advantages of spray cooling technology for temperature control in cooling process of section steel could be fully taken, the cooling effect of cooling bed on limited area is better and capacity of cooling bed is improved with the spray cooling technology, which provide reference for upgrading the spray cooling system of online cooling bed.

The chemical composition of wire rod for 2 200 MPa ultra-high strength steel strand is designed based on the chemical composition of SWRH82B. The Φ14 mm wire rod is rolled by second heating and cogging with 280 mm×380 mm continuous casting billet. The tensile strength of hot rolled wire rod is increased from 1 150 MPa to over 1 450 MPa by optimizing the cooling rate of wire rod. The target that the strength of steel strand reaches over 2 200 MPa after drawing is realized. The results of industrial trial production showed that the time of soft blow and deep vacuum was the key to control the size of non-metallic inclusions and oxygen content in steel as well as it should be more than 15 min; under the condition of constant casting speed and the degree of superheat is below 35 ℃, the center macrosegregation index could be controlled below 1.15; the ideal microstructure of sorbite could be obtained by controlling moderate cooling rate and optimum cooling rate was 4.89~5.62 ℃/s.

Such aspects as the establishment of data governance system, construction of data platform and data application design are planned and designed by taking “acquisition, storage, management and application” of data as the main line, aiming at such existing problems that the data sharing and risk early warning in financial domain of Baotou Steel are not timely as well as combining with the business situations and future plan of financial department of Baotou Steel. Moreover, the complex and changeable data application scenarios are satisfied through data warehouse design and data platform application design. The business indicators are improved and business decisions are supported through effectively using data internally; the management efficiency of enterprise is improved and marketing is assisted through constructing client portrait and dissecting customer transactions externally.

The S450J0 steel pile is vanadium nitrogen alloy steel in H section steel family as well as it is with such characteristics as high strength, heavy gauge, good impact toughness and weldability. In the paper, its key technologies and processes are mainly introduced. The composition of steel is designed as well as the relevant smelting, continuous casting and rolling processes are formulated based on the performance requirements of products. The production practices show that the composition design of S450J0 is reasonable and products could meet the requirements of technical agreement. The technical difficulties are the stable control of high nitrogen content in industrial productions and rolling of heavy gauge with small compression ratio.

The Φ7.3 mm wire rod without drawing for high-speed wire rod is rolled successfully by reasonable roll pass and guide designs as well as optimization of control process aiming at the individual requirements of it in market combining with the characteristics of the fifth-generation Morgan high-speed wire rod mill. As a result, the usage requirements of users could be satisfied very well and product mix of the fifth-generation Morgan high-speed wire rod mill is widened, which could provide the references for developing like products subsequently as well as a brand new market is exploited and the green production in the whole process of industry is realized.

The 4^# slip mass in area D of the main stope of Bayan Obo Iron Mine is above the fixed transport corridor of 1 458 m to 1 430 m of the main line of stope as well as it is mainly composed by piling up loose gravel and dimension stone so that the larger and extremely unstable slope structure is formed, which directly threatens the safety production of lower part. If it is not treated in time, it will cause to suspend production in the whole stope. The treatment scheme of taking the 1 542 m platform as dividing line of step by step governance, adopting the method of cutting slope and reducing load at upper part as well as adopting the cleaning and reinforcement of slope at lower part is established through actual investigation and analysis of current situations for 4^# slip mass. The expected goals and effects are completely achieved after implement the treatment scheme so that the conditions of safety production at lower part are effectively improved, which could be as reference in future slope treatment.

In the paper, such aspects as the design thoughts, principles and methods of evacuation lighting and standby lighting in electrical room of steelshop are elaborated by taking GB 51309—2018 Technical Standard of Emergency Lighting and Evacuation Indicating System for Fire Fighting as the design consideration combining with the design process of converter project in a steelshop. The necessary illumination and accurate evacuation information are provided for safe evacuation of personnel so that it is ensured through selecting reasonable emergency evacuation lighting control system for fire fighting as well as power supply and distribution scheme of lamps and lanterns.

The changes of morphology, component and size for non-metallic inclusions in smelting process are studied with metalloscope and scanning electron microscope-energy spectrum analysis by sampling in each link of technological process of heavy rail. The results showed that the non-metallic inclusions in smelting process were spherical and their main components were CaO-SiO₂-MgO-Al₂O₃ as well as the proportion of content for each component was changed regularly with technological links, sizes were decreased gradually and quantity was reduced with the advance of technological process. The main source of inclusions in rail could be judged according to the change laws of components for inclusions in each process of smelting process for heavy rail. It could be inferred that the large size inclusions in heavy rail steel are compound inclusions composed of deoxidation product that is not upfloated combining with foreign inclusions during continuous casting process by analyzing the scanning electron microscope-energy spectrum detection results for large size inclusions in heavy rail.

In this paper, it is analyzed the essential differences between cost budgeting with ERP system and traditional cost budgeting as well as discussed the advantages of ERP system in cost budgeting based on its characteristics in the cost budgeting process of iron and steel enterprise combining with the actual production of an iron and steel enterprise. The degree of participation and work efficiency of all staff in cost budgeting are significantly improved by the high synergy and efficiency of ERP system in production practices, which could provide timelier and more reliable data for deploying production decisions of company.