With the advancement of information construction for iron and steel enterprises, the data volume generated in various production technology process links is increased significantly, especially the data for raw materials and logistics of iron and steel, which shows universality, relevance, diversity, dynamism and complexity. In order to explore data values fully, the data warehouse of raw materials is successfully established, visualization management and deep analysis for raw material data of steelmaking are realized as well as mining, processing and analysis of data for raw materials and logistics of iron and steel enterprises are completed successfully with the big data platform, combining the ETL(extract, transform, load) data extraction technology with converging and developing personalized data aiming at the data for raw materials and logistics of steelmaking for a steel mill.

The assembly for pretwisted blades of turbine has significant effect on its overall performance. In this paper, its deformation mechanism is studied and simulation experiments are carried out through finite element model to verify the accuracy of assembly system for pretwisted blades. The process parameters of manually tapping blades are obtained using high speed camera and piezoelectric type impact sensor as well as corresponding mathematical model is established. The parameters of this model are adjusted in software to design the assembly system for pretwisted blades of turbine. The final results indicated that sufficient impact could be generated by the assembly system to meet assembly requirements when the range of air source pressure was between 0.4 MPa and 0.6 MPa so that feasibility and effectiveness of the system were verified.

In the paper, the typical rollover defect at edge on surface of stainless steel plate is studied. The morphology, microstructure and composition of cross section for rollover at edge are analyzed by metallographic microscope and scanning electron microscope. It is found that the rollover defect at edge has formed on hot rolled intermediate billet as well as micro morphology is the crack with opening pointing to edge and there is delamination for subscale, which is caused by uneven transverse deformation of metal in rolling process under high temperature condition. According to this, a type of formation mechanism of the defect is proposed. This defect could be reduced or even eliminated through effective prevention measures so that the impacts of it on yield of finished products could be reduced.

In the wave of digital transformation, the intelligent operation and maintenance technology has gradually become important method for enterprises to improve operating efficiency and reduce costs. Grafana, as the visual monitoring tool of open source data, is widely used in intelligent operation and maintenance with its powerful data integration ability and flexible visual interface. In this paper, it is discussed the applications of Grafana in operation and maintenance of iron and steel enterprises as well as analyzed its core functions, best practices and practical cases, which are aimed to provide references and guidance for enterprises to implement intelligent operation and maintenance.

In this paper, the causes of surface defects for 310 zed beam rolled by YQ450NQR1 continuous casting billet produced with cross section of bloom (320×415 mm) by 7^# continuous casting machine in Steel-making Plant of Baotou Steel are analyzed and control scheme is proposed so that the yield of product is improved. The tongue-shaped defects in rolled products are determined to be caused by the surface crack at corner of continuous casting billet by analyzing the macrostructure and microstructure of continuous casting billet and rolled products with metallographic microscope and scanning electron microscope. The qualified rate of YQ450NQR1 continuous casting billet is improved from 90.5% to 98.5% and stable control of product quality for 310 zed beam is realized through reducing the water amount and optimizing uniformity of water crevice for crystallizer to improve the uniformity of continuous casting billet cooled in crystallizer as well as taking such measures as reducing the specific water amount of secondary cooling, increasing casting speed to increase the surface temperature of entering tension leveler and optimizing slow cooling regime.

Dust removing fan is the key equipment of blast furnace production system. If there is abnormal vibration of fan equipment, the fault alarm would be triggered. As a result, there is not dedusting air volume in the environmental dedusting system so as to cause such environmental pollutions as flying dust. In the paper, it is proposed the causes and solutions for vibration fault of motor for dust removing fan for blast furnace by taking the basic principle of “high efficiency, high quality, low cost, green and environmental” as well as elaborated strengthening method for foundation bolt of motor and how to solve the problem of motor vibration with the six-point positioning principle. This method has been validated through field practices, which could effectively prevent and solve the problem of unnatural vibrations for dust removing fan.

The effects of adding rare earth element Ce on microstructure and magnetic properties of non-oriented silicon steel 50W470 are studied from such aspects as inclusions, precipitates, grain size and texture. The proportion of central equiaxed crystal in the billet of non-oriented silicon steel after adding rare earth element is 41%~45%, size of rare earth inclusions existed in forms of globularity and rod without sharp corner is about 664 nm. There is obvious inhomogeneity of microstructure on the RD-ND plane of hot rolled microstructure, it is mainly recrystal microstructure with a small amount of banded microstructure on surface layer and mainly banded microstructure in the center as well as there are part of recrystallized grains among banded microstructure. For the finished product of rare earth doped non-oriented silicon steel 50W470 produced with complete process, its magnetic properties, iron loss P1.5/50 is 3.142 W/kg and magnetic induction intensity B50 is 1.705 T.

With the development of global economy, the energy poor and environmental pollutions are becoming increasingly serious as well as low carbon and environmental protection, energy conservation and emission reduction have become the focus of global attention. In this context, Baotou Iron & Steel (Group) Co., Ltd. actively responds to the call of the country, promotes elimination and replacement of old-fashioned diesel locomotives, which are committed to achieving green and low-carbon railway transportation. In this article, the transformation ideas, technical solutions and practical application effects are discussed by taking the research and development and application of pure electric locomotives in factory region of Baotou Steel as object of study. The practical application shows that the effects of pure electric locomotives on saving energy as well as reducing consumptions, carbon emissions and noises are significant. The research of this article provides the solutions for green railway transportation of all industries as well as practical references for promoting green transformation of rail transit equipment in our country and high quality co-construction of the “Belt and Road”.

It can be obtained that the concentration and granularity of pulp into fine sieve are positively correlated through experiment. The finer the granularity, the lower the concentration of pulp. The screening efficiency of sieve mesh with aperture of 75 μm is higher than that of the other three types of sieve mesh and it could reach 42.55% after using for 180 days under the conditions that the maximum concentration of pulp is 51.57% and minimum is 35.19% as well as experimental conditions of granularity of pulp into fine sieve and service time. The increase of run load for ball mill caused by low screening efficiency of fine sieve, pressure of staff who need to frequently change sieve mesh and potential safety hazard on site caused by frequently changing sieve mesh could be effectively reduced by selecting optimal operating conditions of sieve mesh for fine sieve.

The prominent problem existed in the production and sales for Kabuki Mine of Wuhai Mining Co. is high rate of fine ore of raw ore, while the sale price of fine ore in market is the lowest so that costs are difficult to be covered. Therefore, it is of great significances for reducing costs and increasing benefits in mines to improve on-site blasting technology so as to improve blasting quality. In order to find new method to improve the blasting effect, numerical simulation of blasting in the zone of total explosion is realized based on different blasting schemes so that the technical problem of past single-hole numerical simulation is solved as well as the effects under different blasting conditions are with comprehensive and deep analysis. Finally, the scientific and reasonable technical scheme is proposed by optimizing blasting schemes combining with such three aspects as design, analysis and numerical simulation so that blasting costs are saved. The experimental study on hole-by-hole blasting with uncoupled charge in radial direction is designed and proposed through studying the influencing factors of blasting process on generation of fine ore and combining with existing technical plan of blasting for the mine. The numerical simulation of blasting scheme in blast zone is carried out based on the GDEM blasting simulation software and particle size is analyzed for simulation effects. The study showed that the rates of fine ore and block were decreased by 9.45% and 3.07% respectively, qualified lumpiness was increased by 12.52 % and blasting effects were significantly improved with the optimization scheme.