In this article, it is introduced such three aspects as the background, direction and significances of establishing the intelligent party building platform driven by digitization, platform architecture and introduction of functions as well as innovation research and applications of party building platform. Such modules as information management of party affairs, information visualization of party affairs management, casting soul of party building brand, collaborative communications of knowledges and mobile assistant of party building are established so that the digitization and intelligence of party building work are realized as well as convenient management of the entire process of party building work is promoted.

In the paper, the causes of common faults for vacuum on-load tap changer of transformer are systematically analyzed and improvement measures for its reliable operations are deeply discussed aiming at the key effects of its operation stability on power system security. It is found by analysis that the causes of faults for on-load tap changer are various. The service life of equipment is increased, downtime is reduced and overall operating efficiency of power system is improved through such measures as optimization design and model selection as well as normalizing installation and commissioning. Moreover, it is aimed to provide the comprehensive troubleshooting ideas and effective improvement scheme of reliability for operation and maintenance staff of power to ensure the stable operations of vacuum on-load tap changer of transformer so that the reliability of bulk supply for power system is improved.

In the paper, the risks of short circuit for outdoor bus bar caused by foreign objects are indicated through analysis aiming at the accident of protective trip for longitudinal differential of main transformer due to short circuit of AB phase for 10 kV exposed bus bar caused by birds in 110 kV substation. The feasibility for retrofitting bus bar insulation of iron and steel enterprise with the self-fusing tape of silicone rubber with radiation crosslinking is discussed combining with the trend of insulation technology. Moreover, it is elaborated that the material is with such advantages as high temperature resistance, self-fusing sealing and weather resistance. The problem of short circuit caused by lapping of foreign object is completely solved by applying the material in 10 kV bus bars of Baotou Steel so that maintenance free and safe operations are achieved, which could provide long-term protective scheme for the industry.

In the paper, the core operation risks and management challenges facing in such high risk scenes as high temperature molten metal area, special equipment and finite space are deeply analyzed by taking a large rail and beam rolling plant as the typical case aiming at the grim reality that the incidence of accidents is high in maintenance and repair operations of contractors in the metallurgical industry. It is found that the accidents are caused by such key management defects as formalization of examination and verification of qualification, omission of process monitoring as well as insufficient emergency coordination through this study. In this study, a set of closed loop safety management optimization system covering the entire process of “access-monitoring- acceptance” is proposed and established to solve these problems. The core content of the system includes establishing three-dimensional access, examination and verification model integrating “qualification inspection-technical capacity assessment-credit assessment”; developing and applying management platform of digital work permit to realize process standardization and dynamic supervision of risks; designing and implementing regime of concurrent technical disclosure and safety disclosure as well as mechanism of cooperation of proprietor and contractor; establishing linkage mechanism of blacklist based on performance assessment. The paper is aimed at improving the essential safety level for operations of contractors in metallurgical enterprises as well as providing theoretical references and practice paths for innovating safety management patterns in the industry through systematic optimization.

In this paper, the content of FeO in sinter is determined with pressed power pellet-X-ray fluorescence spectrometry. The method for determining content of FeO in sinter with X-ray fluorescence spectrometer is established with diffraction channel configured by Simultix 15 X-ray fluorescence spectrometer. The detection range of the method is 5.88%~13.00% and linearly dependent coefficient of the calibration curve established could reach 0.999. The detection speed is fast and analysis results are accurate with this method, which could replace classical wet chemical method to analyze the FeO in sinter on site.

In this article, it is introduced the hidden dangers found by on-site safety inspection of 15 small and medium-sized metallurgical non-ferrous enterprises in a west area are with classification and tabulate statistics in accordance with the Judgment Criteria of Major Potential Accidents in Industrial and Trading Enterprises and the Classification and Codes of Hazardous and Harmful Factors in Production Process. Moreover, the own problems of small and medium-sized metallurgical non-ferrous enterprises, mutual problems of enterprises as well as their causes are further analyzed with the function of pivot table of Excel combining with data analysis aiming at the current situations of safety work in enterprises. As a result, a series of measures and suggestions for improvement are proposed for safe development of enterprises and regional industries, which are with reference significances for improving safety management and compliance in large-scale metallurgical non-ferrous enterprises and other industrial and trading enterprises.

The method of testing recrystallization temperature for cold rolled sheet with thermal simulated test machine in laboratory is introduced in this paper. The thermal simulation experiment schemes with a series of annealing temperatures and time are designed combining with on-site production conditions. The recrystallization temperature of test steel is obtained through thermal simulation experiments of SPFC390 cold rolled sheet at a series of temperatures, hardness test and microstructure analysis. The recrystal activation energy and coefficients are obtained by calculation as well as the relational model of recrystallization temperature and annealing time for test steel is established, which could provide the basis for formulating or optimizing annealing process on site.

The experimental study on discarding tailings in advance is carried out for raw ore to be ground and ore discharged by primary ball mill of a mine with the processes of dry-type and wet-type discarding tailings in advance based on studying process mineralogy of low grade iron ore in the mine as well as size composition of raw ore to be ground and ore discharged by primary ball mill in the existing process. The experiment results showed that the tailings with productivity of 28.27% and content of magnetic iron of 0.44% could be discarded for raw ore to be ground with dry-type discarding tailings in advance; the tailings with productivity of 33.44% and content of magnetic iron of 0.49% could be discarded for raw ore to be ground with wet-type discarding tailings in advance; the tailings with productivity of 41.39% and content of magnetic iron of 0.36% could be discarded for ore discharged by primary ball mill with wet-type discarding tailings in advance.

In this paper, the effects of optimizing structure of coal as fired on metallurgical performances of coke are systematically studied by adding XN fat coal and SX coking coal S1.3 based on the coal as fired of coke oven in a company aiming at the strict requirements of coke quality for blast furnace ironmaking. The experimental results showed that the coke strength after reaction (CSR) and mechanical strength (M₄₀) could be significantly improved with both scheme 1 and 2, thereinto, CSR was increased by 7.7 percentage point, M₄₀ was increased by 6.4 percentage point as well as proportion of large and medium coke size was increased by 7.64 percentage point with scheme 2 compared with those of basic scheme. This study provides theoretical and practical basis for industrial coal blending optimization.

In this article, the increase of ore types blended under the current condition of proportion of iron concentrate in sintering of Baotou Steel is researched as well as optimal ore blending scheme is proposed through comprehensive evaluation of sinter from such aspects as the chemical composition, size composition and metallurgical performances. The research results showed that the quality indexes of sinter in scheme 4 (45% self-produce iron concentrate+31% Mac fines+11%FMG mixed ore fines+5% high-silicon Brazilian rough ore fines+4% Indian ore fines+3% limonite) reached optimal values, solid fuel consumption was decreased by 3.46 kg/t compared with that of benchmark scheme, finished product rate was increased by 3.09 percentage point, drum strength was increased by 2.54 percentage point and average particle size was increased by 0.37 mm so that this scheme was preferred.