The rare earth wear resistant steel produced by the production line of wide and thick plate of Baotou Steel is the national green design product. In this paper, the distribution of carbon emissions for products in such four stages as within enterprise, load of upstream, transportation stage and recycling by products and carbon emission of each working procedure in enterprise are analyzed as well as the technological paths of carbon drop for rare earth wear resistant steel products are discussed through the life cycle assessment (LCA) of product. The results showed that the carbon emission of rare earth wear resistant steel was mainly in enterprise, accounted for about 78.86% so that such processes as the iron making, sintering and coking as well as energy load in enterprise were the key points of carbon drop, recycle of by products played an active role in carbon drop and applications of advanced technologies made significant carbon drop possible. The carbon emissions in enterprise will be increased by developing high-performance rare earth wear resistant steel, but the effects of energy conservation and carbon drop for the society are significant so that it plays an active role in realizing carbon neutrality in our country to vigorously promote and apply rare earth wear resistant steel.

The effects of surface morphology for cold rolled automobile steel on the morphology, compactness and phase composition of phosphating film are very important, but there would be inevitably some scratches in such processes as packaging and transportation. The effects of artificial scratches on the surface roughness, morphology of phosphating film and phase composition of cold rolled automobile steel DC04 are analyzed with such test equipment as the surface roughometer, scanning electron microscope and x-ray diffractometer. The results showed that the average value of surface roughness R a was 1.124 μm for mother blank of DC04, average value of peak density R P c was 76.5 cm^-1, R a basically unchanged and R P c decreased slightly after artificial grinding; R a of all samples for DC04 changed a little, but R P c increased slightly compared with those before phosphating; local structure of phosphating film on the surface of sample with artificial scratch was discontinuous, content of incompact zinc phosphate tetrahydrate, Zn₃(PO₄)₂·4H₂O in the phosphating phase was 100%, content of compact zinc ferrous phosphate tetrahydrate, Zn₂Fe(PO₄)₂·4H₂O and value of “P ratio” were zero, so the phosphating effect was poor.

In the paper, it is summarized the necessities of establishing statistical system for archives by analyzing the current situations and existing problems of archival statistical work in group company as well as elaborated the archives management system in detail from such four aspects as the function design, technical route design, practical application and prospect combining with some experiences of the statistical management of archives in Baotou Steel. The human and material inputs are saved as well as the costs of archives management for group company are reduced through the standardized management and networking applications of statistical system for archives in group company.

The digital analysis system for enterprise finance collects and extracts data from the enterprise resource planning (ERP) information system, yonyou NC system and Internet industry to build the data analysis set of enterprise finance. The financial data is analyzed and mined with the data analysis technology combining with the financial model and financial business; the financial indexes and analysis results are displayed adopting the visual data display technology. The system provides the comprehensive, intuitional and visual analysis means of financial data for the financial staff of enterprise as well as the means of assistant analysis and decision making for operating management finance of manager in enterprise.

With the axle load and transport volume of train increase year by year, it’s necessary to use new type high strength rail to satisfy the operating requirements, prolong the service life of rail and reduce the maintenance of railway. The third generation of rare earth heat-treated rail is successfully developed by Baotou Steel through researching the composition optimization and heat treatment process of rare earth rail. Its tensile strength R_m≥1 300 MPa, percentage elongation after fracture A≥10%, tread hardness HB is 380~430. The experimental study showed that the rare earth was easy to attach to the inclusions in high carbon steel rail so that such inclusions as MnS and Al₂O₃ were modified; simultaneously, the lamellar spacing of pearlite was reduced and austenite grain size was refined by rare earth so as to improve the toughness of high carbon heavy rail steel. The wear resistance and contact fatigue resistance of rail could be significantly improved with new type heat-treated rare earth rail, which is suitable for heavy haul railway and section with small curve.

The smelting and rolling of hot rolled U75V rails with different contents of rare earth Ce are carried out in laboratory. The low temperature impacting property and fracture toughness of the rolled rail are compared and analyzed. The test results showed that the impact toughness of rail at room temperature could increase by about 30%, low temperature impacting property at -60 ℃ could increase by about 60% after add 0.005 6% rare earth Ce into hot rolled U75V rail; the average value of -20 ℃ K_IC of rail increased by about 14% and the average value of -60 ℃ K_IC of rail increased by about 15% so that the addition of rare earth Ce could further improve the low temperature toughness of hot rolled U75V rail.

In the paper, the production technology and technological improvement for 500 MPa cold stamping automobile axle housing steel plate are elaborated, the chemical components of Nb, Ti, Cr and Mo as main strengthening elements are designed as well as a series of whole production technology including smelting, continuous casting, heating, rolling and cooling is formulated. The steel plate is with such comprehensive properties as high strength and ductility and toughness, complex cold stamping without cracking as well as small thickness fluctuation on one plate and anisotropy. Its production technology is mature and stable so that the probability of cracking in cold stamping process is greatly reduced, which could meet the technical requirements of automobile axle housing steel and the processing cost is reduced.

In this paper, the chemical composition and annealing process of galvanizing process for hot-dip galvanized fingerprint resistant sheet DCJD2+Z for household appliances are designed. The effects of different annealing temperatures on the metallographic structure and mechanical properties of steel strip DCJD2+Z are studied with such analysis methods as optical microscope and universal tensile testing machine as well as the process of DCJD2+Z products is determined combining with the using status of users. When the galvannealing temperature is 810~840 ℃ and elongation of temper mill is 0.6%~1.2%, the mechanical properties and formability are good to meet user requirements.

The tubular belt conveyor is the main tool for materials transportation in modern productions. In the paper, the causes of such faults as off tracking, rolling over, tearing and tube expanding of belt for tubular belt conveyor are found out through analyzing its working principle and common various faults in operations in detail. As a result, the devices for preventing off tracking, tearing, spillage and tube expanding are manufactured and installed so that the loss of belt and fault rate of tubular belt conveyor could be effectively reduced as well as the normal operations of production are ensured.

In the paper, the transformation plan of increasing four sub lines in the area of car dumper inside station is proposed based on the weak transportation organization as well as study of capacity expansion and transformation of station aiming at the problem that the holding volume of cargo trains in railways bureau is so great that the lines inside rare earth steel station are limited. The effect of limited lines on efficiency of fetching and delivering train is relieved, traffic congestion inside plant is avoided as well as unloading capacity of goods allocation is improved so that the unloading of raw materials and productions are further ensured.