The new understanding of ore-controlling structure for ore deposit of Bayan Obo is put forward. It is considered that the original syncline structure does not exist. The ore deposit of Bayan Obo is controlled by the Ulan Bragg major fracture and wide groove fracture, which are intersecting at the location of Bayan Obo ore deposit. Bayan Obo ore deposit is deeply controlled by major fracture and the ore-controlling structural model is established.

There is a great deal of raw coke oven gas of 700~800 ℃ in the process of mixing coal transforming to coke in the coking chamber of coke oven and it is containing with a lot of waste heat. The goals of energy conservation and emission reduction as well as developing circular economy are realized by selecting and applying new waste heat recovery device suitable for the company as well as applying it in the production practice combining with the actual situations of waste heat generated in production of coke oven.

In this paper, the basic characteristic indexes for serpentine of Hanzhong are studied. The proportioning and adding scheme for serpentine of Hanzhong instead of serpentine of Nanyang is put forward according to the basic characteristics and physical and chemical indexes of the mine as well as the production is carried out on the 500 m² sintering machine of Baotou Steel. The production results showed that the physical and chemical indexes and metallurgical performances of sinter were improved by proportioning and adding serpentine of Hanzhong compared with serpentine of Nanyang as well as the solid fuel consumption of sinter increased.

The trouble-free operation of blast furnace is achieved through taking such technical measures as strengthening the management of raw fuel, reducing powder into furnace, stabilizing operation system, unifying the operation of four shifts and strengthening management of tapping iron in cast house. The quality of molten iron was significantly improved in September of 2021, the average values of sulphur content and silicon content in molten iron of the whole month reached 0.025% and 0.58% respectively and the ratio of first-grade products reached 93.02%, which was 43.85 percentage points higher than that of last 12 months so that the better economic results have been achieved.

In this paper, the operation of tapping iron in front of 6^# blast furnace of Baotou Steel in later stage of campaign is summarized. In view of such problems as the water at taphole, splashing at taphole, coal gas leakage, block of coke at taphole, short iron flow time and unstable furnace temperature caused by a lot of damages of the sixth sections of cooling stave of 6^# blast furnace in later stage of campaign, the safe production is realized and the work of the taphole in front of the furnace is improved by improving the operation system in front of the furnace and taking effective preventive measures.

In this paper, the multi-objective optimization system of bottom blowing argon is established by selecting different technological parameters at each smelting stage, considering the different metallurgical technology objects at each stage in smelting process of refining furnace, analyzing and studying the bottom blowing technology of refining furnace. The parameters of bottom blowing argon at each stage are optimized so that the stir efficiency is improved and the refining time is shortened, which provide the basis for the bottom blowing argon system.

The production manufacturers' feedback of commercial vehicle is that the design of original car is adopting the Q345 and the designed carrying capacity is that the instantaneous carrying capacity of baseplate is less than 600 MPa. Since the current requirements for fuel economy and power load capacity of commercial vehicle are gradually increased, the optimization of materials for car body and lightweight for current vehicle model is in urgent need. In the paper, it is introduced the current material is replaced with the material to promote, the comprehensive analysis of car hopper is carried out with the simplified calculation method and finite element analysis as well as the parametric modeling and optimization calculation of design variables are carried out by taking the car hopper of heavy-duty dump truck as the objective to verify the weight loss of corresponding parts in the case of ensuring to accord with the original carrying capacity.

In view of the current situation that there is no related standards of unified integrity management effectiveness evaluation at home and abroad, an effectiveness evaluation index system for gathering and transportation pipeline based on the regional characteristics of oilfields is proposed in the paper. Under this index system, the five pilot schemes are with the quantitatively effectiveness evaluation and analysis by analytic hierarchy process (AHP) and data envelopment analysis (DEA). The current situation of integrity management effectiveness for pipeline in the oilfield area can be scientifically and objectively reflected based on the result-oriented effectiveness evaluation system as well as the targeted suggestions are put forward to improve the quality of pipeline management. The results show that DEA focuses on the objective and quantitative effectiveness evaluation of indicators, while AHP focuses more on the subjective and qualitative effectiveness evaluation of indicators. It is of great significance to select appropriate effectiveness evaluation method based on the value of index for pipeline management and hint of production efficiency of oil and gas field.

In this paper, the causes of oxidized burning loss for heating furnace of 4^# production line of Long Product Plant of Baotou Steel are analyzed in detail. The improvement measures are proposed according to the working principle and characteristics of the heating furnace so that the oxidized burning loss and accumulation of iron scale in the furnace are effectively reduced, production efficiency is improved and some economic benefits are obtained.

The hot dip galvanized fingerprint resistant plate for high-end home appliances with excellent corrosion resistance, humidity resistance, fingerprint resistance and coating performance is developed through the reasonable process design and combining the film-forming mechanism of passivation solution with features of steel plate. Such indicators as the corrosion resistance, electrical conductivity and humidity resistance could all meet the technical requirements for delivery. It is widely used in manufacturing the outside plate of such high-end home appliances as the computer chassis, server, film and television sound equipment and automatic office system. Unitl now, the capability of steady mass supply is ensured.

In this article, the low cost industrial production plan of pickling high strength automobile structural steel QStE420TM is introduced. The product performances are guaranteed to meet the standard requirements as well as the goal of saving alloy cost is achieved by redesigning the chemical composition, adding the ferro-titanium with lower price to replace part of the ferro-niobium with higher price in the smelting process as well as optimizing the rolling process, which provide the ideas for reducing alloy costs of other series of products.

In this paper, it is introduced that the chemical composition design as well as smelting, continuous casting, rolling and heat treatment technologies of steel plate for trial produced 960 MPa grade heavy machinery by CSP Plant of Baotou Steel. Moreover, its microstructure and performances are tested. The results show that it is pure, the inclusion content is low, matching of low temperature toughness and strength is good as well as the weldability can be compared with the like products in China.

In this paper, such current situations as poor coil shape manufactured with the recoiling line of cold rolling production line, larger deviation of wave heights between the work side and drive side of exported strip steel as well as short service life of rubber roll are studied. The production practices for improving the shape of cold rolled recoiling coil have been carried out starting from the deformation of vertical looper frame and the effects are good. The shape of recoiling coil is improved as well as the effect of reducing cost and increasing efficiency is achieved.

The 650 MPa grade high strength wheel rim steel is developed with the low carbon Nb-Ti microalloying component system as well as controlled rolling and cooling process. The changes of mechanical properties and metallographic structure of materials after weld thermal cycle as well as the precipitation and dissolution of Nb and Ti carbonitrides are mainly studied. It is concluded that the finer the precipitates of material matrix, the greater the dislocation density and the greater the decrease of strength of heat affected zone compared with the matrix and weld joint. When it is lower than the coordinated deformation force of material in the process of hole enlargement and shaping for rim, the cracking of the heat affected zone or the quality defect of necking is occured.

In this paper, the influence factors of atmospheric corrosion resistance of weather resisting steel Q450NQR1 for railway vehicles are introduced. Its microstructures and inclusions are analyzed by scanning electron microscope as well as the influences of such factors as type and homogeneity of microstructure, grain size and non-metallic inclusions in steel on the corrosion resistance of weather resisting steel are discussed. The study results show that the corrosion rate of weathering steel decreases and the corrosion resistance in atmospheric environment increases by 31% when its grain size decreases from 11.2 μm to 7.5 μm.

It will be one of effective means to improve the performances of hot-rolled section steel to replace the microalloy addition with green, energy-saving, low-cost and resource-friendly controlled cooling technology after rolling. The metallographic structure of product with controlled cooling after hot rolling is ferrite + pearlite, the morphology is fine, performance is uniform, yield strength is increased by about 70~100 MPa and tensile strength is increased by about 80~150 MPa. In the paper, the research ideas, methods, experimental simulation and application examples of controlled cooling after rolling for high-strength section steel are introduced by taking angle steel as an example. The results show that the experimental data and simulated results are consistent with the production practices, which proves that the research method proposed in this paper is accurate and effective so that it can provide the reference for researching controlled cooling of angle steel and other hot-rolled section steels.

In this article, it is introduced a series of high temperature tempering tests for 75 kg/m on-line as-heat-treated bainite rails in the laboratory as well as compared and analyzed the conventional mechanical properties, fracture toughness at-20 ℃, spreading rate of fatigue crack, residual stress and microstructure of rails with different tempering processes. The test results show that the strength, hardness and residual stress of on-line as-heat-treated rails decrease linearly; such toughness indexes as fracture toughness at-20 ℃ and impact energy firstly decrease and then increase with the tempering temperature increases as well as the performance indexes of fracture toughness and spreading rate of fatigue crack are better than those at low temperature tempering state. The on-line as-heat-treated with high temperature tempering is with higher fracture toughness and lower spreading rate of fatigue crack so that the characteristics of high toughness and resistance to generation and spread of crack for bainite rails could be further exerted.

In the paper, it is studied the stelmor process of wire rod for 600 MPa grade high strength welding wire and analyzed the influences of alloying elements on the performances of welding wire. The phase transition temperature intervals of hot-rolled welding wire steel at different cooling rates are determined by CCT curve measurement. Moreover, the influences of tapping temperature and cooling rate on the drawing performance of welding wire steel are analyzed. The practices prove that all indexes of wire rod for 600 Mpa grade high strength welding wire could meet user requirements.

Aiming at the accidents such as the grinding machine measuring arm is damaged, the flaw detection device is scratched, and the roll position deviates from the initial position during grinding, this paper puts forward the solution of changing the z-axis limit position and integrating the anti-collision switch in the measuring arm through the inspection of the limit of z-axis running system, X-axis feeding system and X1 axis measuring system, as well as the inspection of motor, deceleration and code disk, as well as the analysis of the measuring system. It ensures the stable operation of production and has the characteristics of strong operability, less investment and easy popularization.

In this article, it is introduced the concept, characteristics and classification of cloud computing, discussed the technical route and architecture for private cloud computing of Baotou Iron & Steel (Group) Co., Ltd. in detail as well as explained its region partition, the configuration and constitution of Internet zone and internal zone, which provide a solid platform for its application and future development needs as well as raises the informationalized level of the company to a new level.

According to the distribution of existing measurement and acquisition points for energy data of Da An Iron and Steel, the wireless communication mode is selected to ensure the energy measurement data to be transmitted to the energy management system timely and accurately, which provides strong support for energy monitoring, statistical analysis of energy and energy supply decision-making. Compared with wired data acquisition, it is with such characteristics as low cost and short duration.

In this paper, the failure causes are studied, analyzed and diagnosed, the solutions are formulated aiming at the failures of electrical circuit and lightning protection system in computer room as well as starting with the electric leakage and outage detection of electrical circuit, internal resistance detection of the circuit and measurement of ground resistance for lightning protection. As a result, the failure of electrical circuit in computer room is effectively prevented and more economic losses caused by the major accidents such as fire are avoided, so that the safe and stable operation of computer room is ensured.

Electric vehicle automatic charging robot is one of the ways to solve the difficult and inconvenient of charging operation of electric vehicles. A pose estimation method of electric vehicle DC charging port was designed based on ellipse detection and binocular vision in this paper. Firstly, the image is preprocessed, then the edges are extracted and filtered, and finally the least square ellipse fitting is carried out after filtering, the pose of the DC charging port is estimated according to the ellipse after filtering. Through the third-party test, it could be found that the accuracy of the method meets the requirements, and the algorithm is robust and the application scenario has high universality.

With the increasingly prominent role of archives in social development and human life, the archives awareness of the whole society has been comprehensively improved and the management upgrade of archives institutions at all levels has been carried out in order, but it is a common prominent problem to ignore the construction of fonds file. In this paper, it is analyzed the importance and existing problems for the construction of fonds file as well as elaborated how to standardize the construction of fonds file from such five aspects as establishing and perfecting the system, improving management awareness, standardizing daily business, enhancing the training as well as intensifying supervision and guidance so as to achieve the goal of improving the level of archives management.