Latest ArticlesThe market of special pipe for gas cylinder is broader and broader, the Φ232.0 mm × 5.5 mm gas cylinder cannot be rolled with the original Φ238 mm pass of 180 work zone. In order to expand the market as early as possible, the Φ242 mm series of pass for tandem mill is developed based on the parameters of pass for existing tandem mill and distribution method of top coefficient of elongation as well as the original Φ230.3 mm mandril is applied so that the production of Φ232.0 mm × 5.5 mm gas cylinder is realized. It is put into service and received a favorable reception of customer.
In this paper, it is introduced the evolution law of mechanical properties and microstructure for BT140TT high anti-collapse casing with the specification of Ф141 mm × 13.5 mm produced by Steel Tube Co. of Baotou Steel with different heat treatment processes, the orthogonal experiment of heat treatment process showed that the optimum heat treatment process of BT140TT was quenching at (890 ± 10)℃ and holding for 40 min, tempering at (660 ± 10)℃ and holding for 90 min, material yield strength≥965 MPa and impact energy at 0 ℃ ≥100 J, which could meet the design requirements of BT140TT anti-collapse casing as well as the integrated requirement of high strength and toughness could be realized.
The 20Mn2A hot rolled wire rod for round-link chain is trial-produced with such equipment as the 100 converter, LF refining, continuous casting with billet and Morgan's fifth-generation high-speed wire rod mill as well as combining with narrow composition control of C and Mn, formulating reasonable controlled rolling and cooling process. The results showed that the performance indexes of product could meet the requirements of standard and technical agreement so that using effect was better.
In this paper, the system component composition, system design, systematic principle and system features of AGC hydraulic control system for wide and thick plate mill of Baotou Steel are introduced and analyzed. Moreover, the troubleshooting and diagnosis of typical faults for the hydraulic control system are analyzed as well as the steps of troubleshooting and treatment for them are summarized and introduced combining with the experiences of on-site maintenance and fault handling for AGC hydraulic control system for wide and thick plate mill, which can be as references for design, maintenance, fault diagnosis, system optimization and improvement of AGC hydraulic control system for rolling mill.
In this article, the components and working principle of the robot of screwing inner ring in tube body introduced for the production line of casing processing of Baotou Steel are briefly introduced. Such problems as the high labor cost, hostile construction environment and the standard working of tightening torque for thread protector in the entire process control cannot be realized are solved through replacing the manual screwing and installation of inner thread protector with robot of screwing inner ring in tube body.
The lift pumping station is the common solution to collect field backwater in modern industry. When the water level of pump station is high, the sewage pump is started for drainage and when the water level is low, the sewage pump is shut down, so the control system is required to be highly reliable. In this paper, it is proposed to collect the liquid level with double liquid level meter, analyze and judge the changes of liquid level for liquid level meter through PLC to determine the running status of liquid level meter and remind maintenance personnel to dispose in time. The practices prove that the reliability is so high that full automatic operation could be realized completely.
The distributing device on 4# blast furnace of Baotou Steel is manufactured by WOODINGS Company of the USA. During the repair of spare parts, its internal part, crank is with the domestic reconstruction. Two months after the production line was put into service, the crank was fractured. The modeling analysis of crank is with the software Solidworks to study the reason of fracture for crank and formulate the improvement project so that the on-site problems are solved reasonably.
The "V" type roller rotation speed model and action time model of upper roll for transport frame are established by analyzing the principle of ultrasonic flaw detection aiming at the control of end-upsetting steel tube in inspection area so that the movement condition of steel tube is controlled accurately and the effectiveness of detection function for diagnostic machine is guaranteed.
The source, composition and treatment technology of waste water and gas produced in the process of manufacturing single rare earth carbonate with rare earth ore concentrate of Bayan Obo of Baotou by such processes as high-temperature roasting of concentrated sulfuric acid, water leaching, transformation, extraction and carbon deposition are elaborated. In this paper, its resource process route is analyzed based on the long-term research trial on treatment technology of waste water and gas as well as combining with the actual production conditions of industrialization for its treatment technology, which is hoped to play a positive role in green sustainable development of rare earth industry.
In the paper, the importance of stability of heating value for operation of CCPP unit is introduced. The feasibility and reliability of operation for CCPP unit with low heating value are explored through optimizing the unit protection, which is beneficial to the treatment of defects for coking coal system of CCPP unit without shut down so that the economic and social benefits of operation for CCPP unit are improved.
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