The microstructure and properties of second generation on-line heat-treated U76CrRE rail with rare earth are stable through optimizing the smelting composition of billet and on-line heat treatment technology of rail during the process of its industrial trial production and research and development. The test results showed that its tensile strength could reach 1 280 MPa, elongation was greater than 10%, tread hardness (HBW) could reach 370~420 and there was no abnormal structure.

The high-temperature deformation behavior and continuous cooling phase transformation law for austenite of X80M steel are studied with thermal simulation compression and thermal expansion tests as well as the parameters of controlled rolling and controlled cooling are formulated and the industrial production is carried out. The study results showed that the deformation in final pass of controlled rolling and controlled cooling process was greater than 25% and it could be with perfect recrystallization, grain size was significantly refined and acicular ferrite + bainite with suitable proportion was obtained when the cooling rate was 20~25 ℃/s, the yield ratio of steel strip was about 0.86, impact energy at-20 ℃ was not lower than 370 J, shearing area of drop-weight test at-15 ℃ was not smaller than 95% as well as ductile-brittle transition temperature of Charpy V test was-45 ℃ to ensure the welded pipe to be with low bauschinger strength variation and ductile-brittle transition temperature and excellent resistance to buckling instability.

The Yangwan Iron Mine occurs in the hornblende plagioclase gneiss of the first formation complex of Wulashan Group of mesoarchean. The ore body is composed of magnetite quartzite and its form is simple, its discontinuous output is like bedded, lentoid in groups and bands as well as the occurrence is consistent with the stratum so that it is a direct indicator for deposit. The iron mine in this area is with stronger magnetism so that it can be an indirect indicator for deposit.

In this paper, it is expounded the acting force caused by ore transfer car on ore transporting highway and the destructional forms to pavement, analyzed the intensity composition characteristics of pavement of ore transporting highway with different grades of road materials and the economic benefits obtained after apply new gravel road materials in Bayan Obo Iron Mine through the comparative test of road material in the process of maintaining road.

The grade of fluorite ore concentrate of Bayan Obo Iron Mine is difficult to be improved under the existing reagent system since its main impurities are fine-grained disseminated iron mineral, rare earth and part of monomeric barite. The barite mineral can be restrained effectively, grade of fluorite ore concentrate could be increased from 80% to 95.72% to reach the acid grade fluorite index through the rational combination of new reagent such as sulfating water glass, aluminum sulfate, tannin extract and naphthenic acid as well as adopting the closed circuit flotation process of one-time rougher flotation and five-time concentration.

The influence of gas flow distribution on blast furnace smelting is important. After the blow-on of 3^# blast furnace of Baotou Steel for medium maintenance, the control interval of reasonable gas flow distribution of blast furnace is put forward based on the data analysis of upper and lower adjustments by taking economic indicators as reference so that the reasonable control of gas flow distribution is realized. As a result, the goals of improving utilization rate of gas and reducing coke ratio are reached so that the long-term stability and smooth operation of blast furnace are maintained.

In this article, the technology of smelting process for X80 submerged arc welding wire steel produced by Baotou Steel is discussed from such aspects as smelting conditions, deoxidation modes, refining slag system adjustment and protective pouring of casting machine. The control goals of low carbon, phosphorus and sulfur are achieved through process research and technical measures for each production process so that the high quality requirements of submerged arc welding wire steel for X80 pipeline of Baotou Steel are guaranteed.

The influencing factors of KR pre-desulfuration technology are analyzed and studied through the test of operation and technological parameters of KR desulfurization. The test results showed that the effects of consumption of desulfurization powder as well as stirring time and speed on the desulfurization rate of molten iron were obvious. Moreover, the parameters of KR desulfurization production technology are determined and the production technology is solidified, which could provide guarantee for stable production of variety steel.

In the paper, it is mainly elaborated a series of problems of Φ600 mm roughing mill since the new production line of bars was put into production in the work zone of strip steel of Long Products Plant of Baotou Steel. The pass, guide plate and tilting plate are remoulded aiming at the corresponding defects of roughing mill. The accident of seizing-up is reduced and production efficiency is improved through the systematic maintenance of Φ600 mm roughing mill so that the design capacity for production line of bars could be guaranteed to be reached smoothly.

The causes, internal and external factors of pipeline corrosion and damage are analyzed aiming at the operation situation of gaspipe network as well as the hidden danger of corrosion and leakage for gas pipeline of Baotou Steel. The corresponding method of plugging leakage accompanied with gas and pressure is pointedly adopted combining with the specific conditions of pipeline corrosion of different mediums to eliminate unsafe factors in operation of gaspipe network, ensure safe operation and normal gas transmission of network as well as safe and stable operation of gaspipe network system.

In this paper, the reasonable alloy composition system and smelting, rolling and heat treatment process routes are designed according to the performance requirements of high strength and toughness steel plate for square cabin of special off-road vehicle, the microstructure of produced high strength and toughness BT700E steel plate is tempered sorbite as well as well as the tensile, impact and cold bending properties are good. The BT700E steel plate has been tested for anti-explosion protective performance as well as there are no cracks on both of the whole protective cover of explosive parts and bending line after inspection, which could meet the protective requirements of protecting against 8 kg TNT explosives for special mine-resistant vehicle and user feedback is good.

The causes for longitudinal crack on high strength steel of wide and thick plate of Baotou Steel are found out through analyzing the chemical composition of high strength steel, water quantity and cone angle of crystallizer, casting powder and production organization combining with the casting machine and technological characteristics for wide plate of Baotou Steel. Moreover, such control measures as optimizing the production organization, properly increasing cone angle of crystallizer, decreasing water quantity of crystallizer and optimizing operation of changing ladle between heats are established so that the longitudinal crack on high strength steel is reduced obviously. The results showed that strict quality control measure was the key factor to eliminate longitudinal crack on high strength steel.

The development of beam steel 800L with the composition design of low carbon, microalloying of niobium, vanadium and titanium as well as controlled rolling and cooling process is carried out in the lab. Moreover, the chemical composition, heating and holding temperatures, rolling and cooling technologies are studied as well as the mechanical properties are tested and microstructure is analyzed. The results showed that the trial-produced 800L steel was with two-stage rolling after held at 1 250 ℃ and finishing temperature was set at 860 ℃, laminar cooling was carried out after rolling and finish cooling temperature was 600 ℃ so that the beam steel 800L with good mechanical properties was obtained as well as its yield strength, tensile strength and percentage elongation after fracture were 753 MPa, 845 MPa and 18.5% respectively as well as the 180° bending test was qualified.

A parts company stamps the parts of "dust cover of brake" and there is the situation that sheet is not suitable in the process of material switch. In this paper, the deteriorating trend of sheet is accurately expressed through two modes of contrast calculation, direction of performance adjustment is given through simulation analysis, friction coefficient is improved through increasing tensile value and optimizing surface micro-morphology so that the performances of subsequent products are improved and user feedback is good.

In this paper, the component design requirements of line pipe BNS with acid service of Steel Tube Co. of Baotou Steel are introduced as well as the tensile property, impact property, microstructure and corrosion resistance of material are tested and analyzed. After normalizing treatment, the material is with good mechanical properties and corrosion resistance. The test results showed that designed BNS could completely meet the performance requirements of line pipe under the conditions of acidic service.

The BG87 high strength steel strand wire rod for railway bridge is independently designed by Baotou Steel as well as its mechanical properties, microstructure and drawing property are studied through such means as controlled cooling process of rolling, determination of static CCT curve, tensile test and metallographic examination. The results showed that the strength and structure property of developed high carbon steel wire rod were good so that it could meet request for utilization of 2 300 MPa grade pre-stressed steel strand. Moreover, the product is applied on experimental bridge of Nachang-Jingdezhen-Huangshan high-speed railway so that a breakthrough of domestic 2 300 MPa high strength steel strand products is achieved.

The high strength and toughness BGX80 wire rod for submerged arc welding wire of X80 pipeline steel is independently researched, developed and designed by taking the composition, microstructure and performances of X80 pipeline steel of Baotou Steel as research basis combining with welding technology, weld structure and performance characteristics in the process of manufacturing pipe. Moreover, the change rules of its microstructure and mechanical properties are analyzed and studied by such means as CCT curve, tensile test and metallographic inspection. The results showed that the use of controlled rolling and delayed slow cooling technologies for steel wire rod for submerged arc welding wire of X80 pipeline steel in Morgan production line of Baotou Steel ensured the strength and toughness of wire rod.

In this paper, it is introduced the working principle and characteristics of cone crusher as well as described the causes of flying cone, the particular fault of cone crusher in detail and mechanical analysis. Moreover, the solutions are put forward combining with the actual work on site, which can effectively prevent and control the fault of flying cone for cone crusher.

The read system parameters of uninterruptible power supply (UPS) are recorded and analyzed through serial port and network technologies to achieve the purpose of knowing the running status, degradation trend and preventive maintenance of UPS. Moreover, the battery performances could be mastered according to the change trend of such parameters as battery capacity and internal resistance of battery pack so that the UPS in cluster can be discharged according to the automatic scheduling through remote control.

With the continuous development of information technology, it is constantly introduced into the field of file management to improve work efficiency of it. In this paper, the functions and technical route of file management information system of Baotou Steel are studied and designed by adopting digital and information technologies based on analyzing the existing archive management pattern of Baotou Steel by taking the informatization and digitization of file management of Baotou Steel as targets to achieve the digital management of archives of Baotou Steel.

The intelligent unmanned crane control for dry coal shed is realized through developing the hardware configuration of control system and software model algorithm with such technologies as edge controller, three-dimensional positioning, anti-swing and anticollision, three dimension scanning as well as reconstruction of point cloud combining with the characteristics of material pile in dry coal shed and environmental factor. In this paper, it is introduced the functions of intelligent unmanned crane system, research and development of intelligent unmanned crane strategy as well as described the research and development process of intelligent unmanned crane.

The robot is designed based on analyzing the environment in which it is to fulfil a task as well as integrating the applicable mechanical structure and programming system. The robot is based on the Mecanum wheel train chassis and with infrared sensor for positioning, identification and control under the control of STM32 single chip computer. The experimental study results showed that the proposed scheme in paper could satisfy the job activities of robot in narrow area.

In this paper, the existing problems and countermeasures in the inspection of special equipment of iron and steel metallurgical enterprises are summarized, which provide the references for enterprises to timely and effectively carry out inspection and management of special equipment.

In this paper, the current situation of existing management and control for labor cost of Baotou Steel Union Co., Ltd. is analyzed and elaborated, the corresponding suggestions on reforming the existing employment and distribution systems are put forward as well as the systematic measures to reduce labor costs are summarized, which provide practical suggestions and ideas for enterprises to successfully complete the "four decreases and two increases" project and achieve high-quality development.

In the paper, the analytical research on the training of Baotou Steel Union Co., Ltd. based on demands is tried to carry out through establishing competency model to formulate more targeted training plan, achieve the purpose of training system optimization, improve training quality and really realize effective talent training, which provide training orientation and theoretical support for the "talents make enterprise strong" strategy as well as lay a good foundation for the long-term development of enterprise.