As one of the important hot tools in perforated rolling process of seamless steel tube, the quality of guide plate directly affects quality and cost of steel tube. In this paper, the effects of modification of rare earth and heat treatment on carbide shape in high chromium nickel alloy guide plate are studied aiming at the problem of its fragmentation during use. Moreover, the microstructure of net carbide in high chromium nickel guide plate is fragmentated and broken, matrix structure is refined and carbide uniformly distributes by selecting reasonable process so that the purpose of improving service life of guide plate is achieved.

In the paper, the continuous cooling transformation (CCT) curve of test steel is determined with FORMASTOR-F full automatic phase transformation instrument by taking 38CrMoAl steel as the research object. The results showed that the microstructure at room temperature was proeutectoid ferrite+pearlite when cooling rate was 0.2~ 0.5 ℃/s; the microstructure at room temperature was ferrite+pearlite+bainite and there was a small amount of bainite when cooling rate was 0.5~1 ℃/s; the bainite was formed at the temperature near Bs in the uppermost part of transition zone for bainite and the microstructure at room temperature was upper bainite when cooling rate was 1 ℃/s; the martensite increased continuously and bainite decreased gradually as well as the microstructure at room temperature was mixed microstructure of bainite+martensite when cooling rate was 2~5 ℃/s; the microstructure at room temperature was just martensite when cooling rate was not less than 5 ℃/s, which provide the reference basis for formulating heat treatment process.

Such problems as abnormal wear of such components as lining plate, uneven product particle size as well as short service life and high manufacturing cost of such components as lining plate, spider cap and head nut caused by uneven burden distribution of distributing device are found during the process of using Sandvik CH-870 crusher in Baoshan Mining Co. so that the frequency of maintenance and operating cost for crusher are high in the early stage of operation. In this paper, the working principle of Sandvik CH-870 crusher is introduced as well as its components such as distributing device, spider cap and head nut are improved combining with the actual situations on site. The operation of equipment is stable, processing capacity of crusher is obviously improved and operating maintenance cost is reduced with the improvement, which provides the references for other enterprises to introduce CH-870 crusher.

As the important energy medium, gas is widely used in each working procedure of metallurgical enterprises, but the inaccurate measurement of mixed gas flow always troubles accurate measurement of enterprise energy. In the paper, it is introduced the composition and general situations of mixed technology for gas of Baotou Steel, elaborated the measurement principle of throttling differential pressure flow meter, analyzed the causes of errors with differential pressure flow meter in the detecting system of mixed gas flow as well as proposed the method for correcting measurement of mixed gas flow under different working and equipment conditions so that the problem of inaccurate measurement of mixed gas is solved.

In this paper, the design and implementation processes of intelligent quality inspection system for scrap steel are mainly discussed. The system adopts such advanced intelligent technologies as artificial intelligence (AI), big data analysis and video capture to automatically analyze and grade the iron and steel scrap in storage so that such problems as inaccurate identification and unwarrantable objectivity caused by artificial quality inspection are solved. The system can be interconnected with the measurement system, settlement system and warehouse system to automatically generate settlement reports so that work efficiency can be greatly improved as well as safe, accurate and high-efficiency operation of scrap steel inspection is promoted.

With the growth in the people’s living standard, the demand of resources is more and more, which leads to continuous exploitation of a large number of mineral resources in our country so that there are many ecological problems. In this paper, the ecological impacts of strip mining in desert steppe are analyzed from such aspects as plant and animal resources, land resources as well as landscape through field investigation in project area by taking the strip mining project in Dongkekeyiligeng mining area of Darhan Muminggan Liahheqi in Inner Mongolia as an example. Moreover, the suggestions on ecological conservation measures of strip mining are put forward based on the theory of restoration ecology.

It is a new reform measure for financial organization to establish the Financial Shared Service Center (FSSC) to enhance collaborative sharing of financial business and it is widely used all over the world at present. It plays an important role in improving the work efficiency and accuracy of financial data so that the core competitiveness of whole group company could be enhanced. In the paper, the necessity and feasibility as well as some ideas on construction path and method of establishing the FSSC in Baotou Steel with the rapid development of information-based system of enterprise are briefly analyzed combining with the financial management mode and development history so as to provide reference for decision-making departments.

The iron ore concentrate with grade of 64.22% and recovery rate of 77.69% could be obtained by taking the process of weak magnetic separation-strong magnetic separation-reverse flotation to the middle low grade ore stacked in a polymetallic mine; the rare earth ore concentrate with grade of 55.85% and recovery rate of 60.08% could be obtained by taking the process of direct flotation with one-time rougher flotation and three-time concentration to the tailings of high intensity magnetic separation; the fluorite concentrate with grade of 91.7% and recovery rate of 29.67% could be obtained by taking the process of one-time rougher flotation and six-time concentration-strong magnetic concentration to the tailings of rare earth ore beneficiation.

In this paper, the experimental study on improving quality and reducing impurities of a fine-grained fluorite flotation concentrate that is difficult to be separated with the high gradient magnetic separator is introduced. Under the condition that grinding size smaller than 0.013 mm accounts for 70%, the magnetic separation tests were carried out to flotation concentrate at different field strengths with high gradient magnetic separator in laboratory. The test results showed that the mineral content of fluorite gradually increased, the more the magnetic impurities were removed as well as the productivity of non-magnetic products and recovery rate of fluorite decreased with the increase of magnetic field strength, the mineral content of fluorite in concentrate increased from 84.97% to 93.63% and recovery rate was 59.51% when magnetic field strength was 1.7 T. The optimal conditions for improving quality and reducing impurities of fluorite concentrate are proposed, which are with the important guiding significance for actual productions.

In the paper, it is discussed the production of continuously adding large proportion of coke wet quenching into blast furnace under the background of maintaining coke dry quenching system of 4 150 m³ blast furnace of Baotou Steel and the improper response causes the fluctuation of furnace condition. The changes of furnace condition are analyzed from the functions of coke in blast furnace as well as the furnace condition gradually returns to normal by adjusting the coal blending structure of coke, charging and thermal systems of blast furnace.