Latest ArticlesThe 2 250 mm hot rolling production line of Inner Mongolia Baotou Steel Metal Manufacturing Co., Ltd. is one of the last production lines put into production in China at present. The new equipment status, especially the accuracy of rolling mill, is the key index for accuracy of device we urgently need to know currently. With the R & D of digital platform for stiffness of hot finishing mill stand of Baotou Steel, the timely and rapid data collection is finished in the short time of shut-down for changing finishing roll, fault handling and short-time overhaul as well as the data is integrated into platform to know virtual condition of rolling mill in time so that the accuracy of rolling mill is improved effectively in real time as well as continuously stabilized and improved.
The technology and equipment are improved, cleaning difficulty is reduced and cleaning efficiency is increased from the perspective of realizing on-line cleaning of mist catcher based on analyzing the factors affecting resistance of mist catcher in production process of desulfurization system.
In the paper, the causes for blocking of regenerator for heating furnace of 1# production line of Long Products Plant of Baotou Steel are analyzed as well as the solutions are put forward according to the working principle of regenerative heating furnace and characteristics of regenerator, with which the replacement cycle of regenerator is effectively prolonged, maintenance costs are reduced, production efficiency is improved and some economic benefits are obtained.
The monitoring of deep horizontal displacement is the key project for field monitoring of foundation pit engineering. In this paper, the method more beneficial to safety of foundation pit engineering is found out through technical analysis on monitoring data of deep horizontal displacement in the foundation pit monitoring project of Baotou three-dimensional comprehensive traffic hub, comparative analysis of displacement and time curves based on field measurement as well as based on embedded positions of inclinometer, selected support systems and different construction procedures of support structure, hoping to be beneficial to future engineering practices.
In the paper, the dedecting and analysis on fixed flash welding joints of U71MnG high speed rail are introduced. The welding joints of different wave heights by ultrasonic testing are compared and analyzed as well as their causes are analyzed, which provides the basis for adjusting welding process so that the quality of welding joints is improved.
The fluorite is widely distributed in the mining area of Bayan Obo. Its degrees of mineralization are different for each ore block, so it is classified as "four generations". The distribution characteristics of fluorite in different generations are studied by means of microscope, XRD and SEM, which prove that the radioactive element Th makes fluorite with the optical property of anisotropism and it has direct influence on the replacement of Ca with Sc.
In this paper, it is introduced the calcium chloride solution is used as dust suppressant for dust suppression operation on dry beach face of tailings aiming at the problem that dust is easy to raise on dry beach face of tailings pond. The concentration of dust suppressant is adjusted in time by observing the moisture and crusting regime of dry beach face after spray the dust suppressant so that the effects of improving the environment of reservoir area and reducing resource loss are good.
The prediction model of coal blending is established with Minitab software so that the problems of large error and low accuracy of coal blending prediction by experiences in Baotou Steel are solved, which plays a stronger guiding role in production. The coke quality can be quickly predicted with the model so that the production of coking coal blending is guided in time as well as the coke quality, the stable and trouble-free operation of blast furnace are ensured. Meanwhile, the range of coal used in Baotou Steel is expanded, high-quality coking resources are saved and costs of coal are reduced so that it is of great significance in application and promotion.
In this paper, the technical scheme of substituting bentonite with cobinder is proposed aiming at the production situation of high ratio of bentonite and high content of SiO2 for pellets of Baotou Steel as well as the experimental research is carried out. The results showed that the grade of pellets could increase by 0.84 percentage points and content of SiO2 could reduce by 0.86 percentage points with 8# cobinder, which can better meet the demands of blast furnace process.
The difficulty of mixing coke powder with retorting coal is solved through such measures as strengthening particle size control of fuel and optimizing the processibility aiming at the retorting coal is with such disadvantages as poor controllability of particle size after cracking, more moisture and non uniform combustion velocity. The maximum proportion of retorting coal is 53% of fuel consumption so that the whole sintering production is smooth, the output increases and quality of sinter is stable. Moreover, the utilization coefficient of sintering machine increases by 0.021 t/m2·h, solid fuel consumption decreases by 5.87 kg/t, content of FeO of sinter decreases by 0.18 percentage points, drum index increases by 2.11 percentage points and the RI increases by 1.77 percentage points.
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