In this paper, it is introduced such devices as the power supply and alarm system are designed and installed on locomotive to avoid the accidents of diesel engine caused by the unfulfillment of inspection or sudden serious leakage of intercooler during the operation of diesel engine. Meanwhile, a leakage detector is installed in the intake port of intercooler of diesel engine to monitor whether the intercooler is leaking or not so that the "water hammer" accident of diesel engine could be effectively avoided.

The characteristics of vibration signals for the rolling bearing of reducer of rolling mill in the bar work zone of Long Products Plant are non-linear and non-stationary so that the fault feature is difficult to be extracted. As a result, the classification of the SVM condition recognition model established based on this is with the problem of poor precision, so a method for condition recognition of rolling bearings based on VMD and SVM is proposed. The experimental and case analysis results showed that the fault feature information of rolling bearing could be accurately and effectively extracted to realize its condition recognition, which provides a new method for field application.

In the paper, a new fault diagnosis method for gearbox combining with the kurtosis of fast spectrum and 1.5 dimension spectrum is proposed aiming at the problem that the initial failure of gearbox is difficult to be recognized. Firstly, the maximum frequency band of kurtosis for original signal is filtrated with kurtosis of fast spectrum, and then the filtrated frequency band is analyzed with 1.5 dimension spectrum. Finally, the positions of faults for gearbox are determined by analyzing prominent components in the spectrogram so as to take precautions in advance. The method is with the analysis validation by project cases, it is fully proved that the fault information could be effectively extracted with this method, which plays a certain guiding role in engineering applications.

In this paper, it is introduced the technical improvement for some problems of iron notch drill of 8^# blast furnace of Baotou Steel in actual productions. The improvement technique is mainly taking the coordination mode of drill pipe and connecting sleeve as the starting point as well as they are redesigned. After the improvement, the iron notch drill is with such advantages as improving the efficiency of opening, reducing the labor intensity of workers as well as saving the costs of productions and manufacturing.

The quenched steel plate of wide and thick plate is a product with strong competitiveness. The stable operation of quenching machine is crucial for production and good network communication is its prerequisite. In this paper, the problems and improvement measures for network communication in the control system of quenching machine are mainly introduced.

In this paper, it is summarized the practical experiences in the governance process of stack effluents for 7 m large capacity coke oven of Coke Chemical Engineering Branch Co. of Baotou Steel, analyzed the main causes impacting the stack effluents for 7 m coke oven exceed standard. The indexes of stack effluents are controlled by such measures as adjusting heating and pressure schedules as well as strengthening oven body maintenance, which provide certain technical reference for governance of stack effluents for JNX3-70-2 coke oven.

In the paper, it is introduced the engineering practice of preparing concrete with refractory brick as coarse aggregate and slag powder as mineral admixture through taking the heat resistance concrete for ground of electrolytic cell workshop of Baotou Aluminium Manufacturer as the research subject. The functions of refractory brick and slag powder for heat resistance concrete are evaluated through comparing the intensity differences of concrete with every mix proportion after burning of high temperature with the heat-resisting ability of normal concrete. Compared with normal concrete without slag powder, its working performance and mechanical performance are higher, the heat resisting property is improved greatly and the practicability of concrete is guaranteed.

The electrolytic cell is the key equipment in electrolytic aluminium industry. Its cradle pot shell consists of two end side plates, two long side plates and a base plate. There are two types of end-side plate, circular arc and flat plate types and there are a large number of parts welded on it. The welding quantity of end-side plate is large and it is easy to be deformed, so the control of welding deformation is the key point and difficulty in the process of installing and welding it. In this paper, the manufacturing technology of flat-plate type end-side plate for electrolytic cell is mainly introduced.

In this paper, the possible main faults of gas chromatograph in the experimental operation process from inlet system of gas path to temperature system and then to sampling system are introduced as well as the corresponding solutions are put forward. Normally, the leakage test method is applied to solve such problem as the leakage in gas path system; the internal electric circuit problems in temperature system are solved by replacing components; different kinds of faults in sampling system could be judged, analyzed and solved with the sequential exclusion method.

The coke oven gas contains large amount of corrosive gas and it is difficult to be eliminated since it is accumulated in the pipeline after condensation. As a result, the corrosion of the pipeline is aggravated and the leak sources are formed so that the energy is wasted even the fire and explosion will occur. In this paper, several conventional temporary plugging methods for leak source of gas pipeline for coke oven under the condition of non-stop gas are introduced. The time and labor could be saved with them, they are relatively economical and practical as well as the safety can also meet the requirements, so they are worthy of discussing, promoting and referencing by fraternities.