In the wave of digital transformation, the intelligent operation and maintenance technology has gradually become important method for enterprises to improve operating efficiency and reduce costs. Grafana, as the visual monitoring tool of open source data, is widely used in intelligent operation and maintenance with its powerful data integration ability and flexible visual interface. In this paper, it is discussed the applications of Grafana in operation and maintenance of iron and steel enterprises as well as analyzed its core functions, best practices and practical cases, which are aimed to provide references and guidance for enterprises to implement intelligent operation and maintenance.

The effective volume of 7^# blast furnace of Baotou Steel is 4 150 m³. On October 23rd, 2022, it was blown down for gunning of lining and remolding inner profile. In the blowing down, the method of dropping stockline by spraying water was adopted and the stockline was dropped to a position below center line of tuyere. The methods of reducing the basicity of furnace slag ahead of time and increasing furnace temperature were taken to increase wall temperature, the match of air and oxygen quantities and assessment method of depth of stockline different from the past as well as the method of spraying water, that is, monitoring the mean value and difference value trend of four points of top temperature to control the water quantity were adopted. After taking the above measures, stockline could be dropped safely and rapidly.

With the incremental production of small size products, coil shape control gradually becomes the key link to restrict quality and benefits. The defective coil shape not only affects operation rate and economic and technical indexes of high speed wire rod production, but also causes such problem as there are troubles in the process of using wire for downstream users so that the efficiency of downstream processing is affected. In this paper, it is analyzed some factors affecting the spinning state of wire rod in high speed wire rod production line, briefly elaborated several cases of defective coil shape in production process, analyzed causes of problems and proposed solutions so as to improve the production efficiency and quality of product. The regular coil shape could ensure smooth wire and reduce rate of fracture of wire for drawing of users so that the quality improvement in the whole process is realized.

In the production technology of continuous casting, oriented silicon steel, as a type of “soft steel” in the traditional sense, shows unique physical properties. Its thermal conductivity is relatively poorer, liquid thermal conductivity is approximately 27% lower than that of ordinary carbon steel so that it shows significant weak thermal conductivity. This property makes it easy to be deformed in high temperature environment. Consequently, there are often such surface defects as liquid level fluctuation of crystallizer, bulge and dimple of ingot blank as well as such internal quality issues as center segregation, center porosity and cracks during the continuous pouring production process. These issues directly impact the number of continuous pouring heats. In order to solve these problems, it becomes the key strategy for increasing the number of continuous pouring heats to design and implement reasonable cooling regime and casting speed.

In this paper, the measurement methods of gauge, diagonal and horizontal bending of main beam for metallurgy crane are mainly studied. Traditional measurement methods for crane with such tools as steel wire and ruler are with such disadvantages as low efficiency, poor accuracy, strict conditions and high safety risk. In order to finish the measurement work of metallurgy crane accurately and efficiently, several methods for measuring gauge, horizontal bending and diagonal of metallurgy crane using instruments and tools are studied as well as the traditional measurement methods of crane are improved and innovated. Practices show that the efficiency of measuring metallurgy crane is greatly improved with these measures.

The studies on hardenability and heat treatment test of steel tube for trenchless drill pipe are carried out combining with its service condition requirements and main failure modes in the paper. The experimental results showed that the depth of hardening layer for obtaining minimum 50% martensite was 11 mm and that for obtaining minimum 95% martensite was 7 mm for the seamless steel tube for trenchless drill pipe containing rare earth, which was with good hardenability; the optimal recommended heat treating regime was obtained after the heat treatment test with adjusting tempering temperature.

The status survey and heat loss test of steam pipeline network system of Baotou Steel are carried out as well as its amount and rate of heat loss during heating season in the winter are calculated aiming at its existing problem of great heat loss. The energy saving transformation measures to reduce heat loss of steam pipeline network system are put forward by analyzing current influencing factors of greater heat loss for the system, which could provide the reference for transforming steam pipeline network system of Baotou Steel.

In this paper, such aspects as microstructure, hardness and wear resistance of rare earth wear resistant steel plate BTNM450 of Baotou Steel and NM1^# wear resistant steel plate produced by a foreign manufacturer are selected to be compared and analyzed. The study results showed that the wear extent of rare earth wear resistant steel plate BTNM450 of Baotou Steel was 0.390 0 g, which was significantly fewer than that of NM1^# wear resistant steel plate. Compared with the wear resistant steel plate BTNM450-NORE without adding rare earth elements, the wear extent of rare earth wear resistant steel plate BTNM 450 of Baotou Steel after adding rare earth elements is reduced by 20.9%. The hardness distribution on section of NM1^# wear resistant steel plate is not uniform and hardness of rare earth wear resistant steel plate BTNM450 of Baotou Steel does not change significantly along the direction of section thickness, which is with excellent wear resistance.

It is helpful for better energy management and optimization as well as realization of sustainable development of enterprises to improve the accuracy of energy measurement. The accuracy rate of data acquisition could be improved by strengthening energy measurement management, perfecting relevant management systems, selecting reasonable sampling points and acquisition and calculation modes as well as using means of data analysis so that the facticity, reliability and fairness of energy data could be guaranteed, which could provide strong supports for such aspects as energy conservation and emission reduction, cost accounting and quality control of enterprise.

The test steels with different La contents are smelted in vacuum induction furnace under laboratory conditions. The morphology and size of inclusions are studied with X-ray diffractometer, field emission scanning electron microscopy, Bruker energy spectrometer, OTS software and electron probe micro-analyzer (EPMA). The results showed that the inclusions, AlN and Al₂O₃ are modified into La-O-S, La-O-S-Al and LaS as well as inclusion size was decreased from 4.37 μm to 2.92 μm by adding La into X100 pipeline steel. The refinement effect of La on austenite grain size is obvious. With the increase of La content, austenite grain size in test steel is increased from level 5 to level 8.5. After adding rare earth La, the main inclusions in steel are La-O-S and La-O-S-Al of about 2 μm in size with the pinning effect so that austenite grain size is reduced significantly.