In this paper, the cognition for ore genesis of iron, rare earth and niobium of Bayan Obo is put forward with comprehensive geological research means through surface geological survey, geostatistics, element spatial concentration regularity as well as researches of the latest deep drilling data and fluid inclusions. It is considered that the iron, rare earth and niobium ores are the genesis of igneous carbonate magma accompanied by multi-period hydrothermal metasomatism in later period, which provide important basis for Bayan Obo to establish the prospecting model, conduct metallogenic prediction and evaluation as well as accurately search for resource target regions.

After years of operation, there are such problems for the crushing system in submontane dressing area of Baoshan Mining Co. as large number of equipment, low technical level and high maintenance costs. The factors affecting crushing operation indexes are found out through investigating and analyzing the current situation of existing crushing technology. The existing crushing circuit is transformed, the original crushing circuit is changed from “one closed circuit each three sections” to “one closed circuit each two sections”, add HP800 fine crusher to realize the matching running of two types of crushers and carry out the size optimization of sieve plate. The particle size of entering grinder is greatly reduced after the transformation, which creates favorable conditions for subsequent grinding and separation operations, the number of equipment as well as workload of equipment maintenance and inspection are reduced so that the comprehensive benefit of RMB 8.54 million yuan per year can be created.

Under the circumstances of environmental protection, production limitation and tension supply of agglomerate, it is becoming a new trend in the development of furnace burden structure for iron making to use large proportion of pellet in 2 200 m³ blast furnace of Baotou Steel. The blast furnace condition maintains stable and trouble-free, application of large proportion of pellets in 2 200 m³ blast furnace of Baotou Steel is successfully realized and the proportion of pellet is up to 50% through adjusting and controlling the bandwidth for matrix of burden distribution, amount of central coke, sequence of material discharge at output section, diameter and length of the tuyere, heat reserve of hearth, basicity of slag as well as actively responding to the changes of furnace condition for operations after the proportion of pellet increases.

The armco iron requires the manganese content in steel to be controlled within 0.005%. In order to study the smelting process for low manganese steel, the thermodynamic and dynamic conditions of demanganization reaction are analyzed. The study showed that the lower the temperature of liquid steel was, the higher the oxidizability of slag and oxygen content in steel were as well as the lower the manganese oxide content in slag was, the easier the oxidation reaction of manganese was. When the manganese content in liquid iron is 0.040%~0.055%, the end point carbon content of liquid steel in converter after bessemerizing is controlled at 0.025%~0.035% and final temperature is controlled below 1 620 ℃ so that residual manganese content in liquid steel could be reduced to 0.04%~0.08%. The demanganization rate of liquid steel increases with the quantity of converter slag increases. Without the deoxidation during tapping of converter, the liquid steel and slag in ladle would maintain higher oxidizability. During the refining process in ladle furnace(LF), the manganese content in steel could be reduced by 32% on average and decreasing amplitude is 0.01~0.04 percentage points. The manganese content in steel could be reduced steadily within 0.05% with the combined demanganization processes of converter and LF.

In this paper, the influences of equipment failure for rolling mill on product quality and improvement measures are discussed by analyzing the relative movement of roll collar for KOCKS rolling mill and flange plate, detection and classification of movement through CAPAS system as well as vibration detection rules of transmission shaft for C module. The results showed that the bending of bars above Φ19 mm was caused by the deterioration of working condition for rolling mill as well as the wave bending of finished product could be effectively improved through maintaining the shaft sleeve and flange plate of rolling mill; the bending of bars below Φ19 mm was caused by the vibration of rolling mill as well as the wave bending of finished product could be obviously improved through repairing the movement and drive system of rolling mill. The axial drifting of roller is determined by strength of rolling bearing of drive shaft so that the vibration of rolling mill is affected. As a result, the wave bending of finished products could be obviously improved through using high quality rolling bearing.

In order to improve the charge discharge efficiency of nickel metal hydride (Ni-MH) battery at high temperature and meet the requirements of service environment, the charge and discharge performance of Ni-MH battery at high temperature are tested by adding NaOH into the conventional electrolyte. The experiment of comparing the charge discharge efficiency of Ni-MH battery added NaOH electrolyte with that of conventional Ni-MH battery is carried out at the environment temperatures of 55 ℃ and 65 ℃ separately. The results showed that the charge and discharge performance of Ni-MH battery added NaOH electrolyte was obviously higher than that of conventional Ni-MH battery in high temperature environment. The charge discharge efficiency is about 3 percentage points higher than that of conventional battery in high temperature environment of 55 ℃ and it is about 17~20 percentage points higher than that of conventional battery in high temperature environment of 65 ℃.

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.

In this paper, the cold rolling process of high magnetic induction oriented silicon steel 27QG090 is explored and studied with the cold rolling testing system of pilot scale test platform as well as the microstructure and macroscopic XRD texture of samples after cold rolling in laboratory are analyzed with the Zeiss microscope and X-ray diffractometer. The study results showed that its microstructure after cold rolling with different reduction ratios was fibrous that elongates along the rolling direction and shear bands in the uneven deformation zone could be observed. Its texture after cold rolling in laboratory was mainly the α texture and a little {001}<110> rotated cubic texture as well as cold rolling specifications preferred 0.27 mm and 0.23 mm. The macro texture of cold rolled sheet for industrial trial production consists of α texture and a small amount of rotated cubic textures, which mainly concentrates in {114}<110> and {115}<110> textures so that the microstructure and texture are consistent with those of cold rolling in laboratory.

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, 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.

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 this paper, the three dimension(3D) modeling software is used to design the funnel-shaped fossula rotunda at iron notch suitable for large blast furnace, the manufacture method of funnel-shaped fossula rotunda at iron notch for monoblock casting is summarized as well as its technical characteristics and application in 7^# and 8^# blast furnaces of Baotou Steel are introduced. The experiment results showed that the service life of funnel-shaped fossula rotunda for monoblock casting was greatly improved and labor intensity of furnacemen was reduced, which were to the benefit of stable and trouble-free operation of blast furnace.

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.

In the paper, the realization process and approaches of cost system in company are elaborated in detail by taking Qinghua Co. of Baotou Steel as an example. The accurate cost accounting and efficient cost management are realized with the cross-platform and cross-system modes the first time so that work procedures of cost business personnel are simplified and working efficiency is greatly improved. This mode is convenient, fast, efficient and with specific task allocations, which provides the feasible references for successfully implementing other subsequent information management systems.

With the information construction of iron and steel enterprises, more and more data are generated in each link of logistics for crude fuel in iron and steel enterprises. The process of logistics for crude fuel relates to the safety of inventory for crude fuel and utilization ratio of storage space. In order to further improve the utilization of data, the real-time collection and monitoring of logistics data are particularly important. Therefore, the visual management of logistics process could intuitively show the connection and trend among information. In the paper, the applications of visual data management in logistics management of crude fuel in iron and steel enterprises are discussed by taking the construction of visualization system of logistics for crude fuel of Inner Mongolia Baotou Steel Union Co., Ltd. as an example.

The expense allocation of auxiliary production unit of Inner Mongolia Baotou Steel Union Co., Ltd. is studied in detail. The expenses are allocated to all the units based on their nature and actual services provided. As a result, each unit knows the expenses they bear more clearly, intuitively and transparently, which could provide the reference for auxiliary units to better provide market-oriented services next. At present, this method has been applied to the monthly cost accounting of company and the effects are good so that all units pay more attention to the cost control.

The data governance refers to the process of transition from using sporadic data to using unified data, from few or no organization flow to enterprise-wide comprehensive data governance and from data confusion to well-organized data. In this paper, the standards and methods of data governance are formulated through the data extraction, cleaning and governance for the system of raw fuel procurement management, transportation management and storage management as well as exploring and researching the application processes combining with the current status of raw fuel procurement, transportation management and storage management. In the process of enterprise informatization, the enterprise development is enabled through informatization, which is the application mode of deep integration for new generation information technology and manufacturing industry as well as will become the core carrier of enterprise competitiveness.

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.

There are certain influences of fluorinion contained in barren liquor of organic amine on the effects of flue gas treatment in the process of roasting rare earth, so the accurate determination of fluorinion is required. Thus, the ion selective electrode method for determining the content of fluorinion in barren liquor of organic amine is established. The effects of pH value, temperature, accompanying ion and organic amine matrix on the determination results are studied as well as the interference elimination test of accompanying ion is carried out. The research results showed that the influences of organic amine matrix on determination of fluorine could be ignored, pH value was controlled at 5.0~6.0 with acetic acid-sodium acetate, interference of accompanying ion could be masked by adding 10 mL of total ionic strength adjustment buffer, analysis effect was the best with stirring for more than 5 min. when determined under the condition that the temperatures of detection and drawing working curves were the same. For this method, the mass concentration of fluorinion shows good linear relationship within the range of 0.04~40.00 μg/mL, detection limit is 0.021 μg/mL and quantification limit is 0.069 μg/mL.The standard recovery experiment for three barren liquor of organic amine samples is carried out based on this method and the recovery rate is 97.22%~104.10%. The method is applied for determining the fluorinion in three barren liquor of organic amine samples and the relative standard deviation (RSD, n=11) of results are 1.9%~2.4%. The results are basically consistent with those obtained with the chromatography.

The sample is dissolved by acid, residue is precipitated and filtered, the mixed flux of anhydrous sodium carbonate and boric acid is melted as well as it is mixed with acid dissolving test solution and the constant volume process is carried out. The contents of Si, Mn, P, Al and Cu in ferrotitanium are determined with the ICP-AES, the analytical spectral lines of elements to be determined and working parameters of instrument are optimized with this method as well as the disturbing effects of matrix elements Ti and Fe are investigated. The disturbing effects are eliminated with the mode of matrix matching and detection limit of the method is 0.000 3%~0.002 7%. The standard samples are determined with this method as well as measured values are consistent with certified values of all compositions, relative standard deviation (RSD, n=11) is 0.85%~9.03%, which could meet the analysis requirements of ferrotitanium.

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.