Steel industry and weighing instrument industry
Ningbo Goldshine Electronic Co., Ltd
【Abstract】 This article outlines the important role of weighing instruments in the iron and steel industry, and proposes that weighing instruments are the lifeline of the iron and steel industry. It grasps a series of information such as production and operation, quality inspection, automation control, safety and environmental protection monitoring, energy saving and consumption reduction in the iron and steel industry, and becomes informatization. The mainstream, the foundation of a modern enterprise.
[Keywords] iron and steel industry, weighing instrument, logistics, information flow, capital flow
- Logistics in the steel industry
The iron and steel industry is a large-scale logistics enterprise. The raw materials come from different factories, mines and businesses, with a wide range of varieties, different qualities, and more or less quantities. These complex logistics systems participate in the entire process of iron and steel production through collection and distribution. The variety is constantly changing with the process, and hundreds of steel products have been formed through mining, beneficiation, pelletizing, burning, coking, ironmaking, steelmaking, and transformation.
(Model, Variety, Specification, Quality, Steel Type) The whole logistics process has been completed. The logistics comes from thousands of raw material supply factories and mines, and the logistics is distributed to thousands of steel users. The whole process of logistics has gone through quantitative removal of coarse and fine, from more to less; geometric shapes from large to small (coarse broken, medium broken, fine broken to ball mill to 200 mesh size), and from small to large sinter, molten iron, molten steel, billet, steel; physics Changes: magnetic separation, flotation, gravity separation, high-temperature sintering, iron-making and steel-making from solid to liquid, liquid steel continuous casting into solid billets; chemical reactions in sintering, iron-making, and steel-making in chemical changes. After such a long “mathematical, physical and chemical” change, the whole process of the logistics operation of the steel industry has been completed, and a complex logistics network of the steel industry has been formed. At the same time, a complex information flow network has also been derived, and finally the capital flow is rewarded. The most important information in the information flow of the iron and steel industry is output and quality. The output is fully undertaken by large scales, and the quality is tested by the balance as the main core instrument. From the macro to the micro, we grasp the core information and lifeline of the steel industry.
Compared with other industries, the logistics and information flow of the iron and steel industry are the most favored and the most complicated. Compared with the coal industry, there are only a few weighing instruments for coal mining, coal transportation, and coal sales. Although China’s coal production is 20%. 100 million tons of steel, steel is at the level of nearly 500 million tons, but the total amount of weighing instruments in the steel industry from raw materials to steel is dozens of times that of the coal industry, and the scales used are dozens of times. As for the petrochemical industry The power sector is even less equipped with weighing instruments than the steel industry. For the equipment manufacturing sector, the automobile industry, tractors, construction machinery, etc., the raw materials need to be weighed, and the products are calculated on the basis of pieces. Therefore, the number of applications of weighing instruments in the steel industry is unparalleled by other industrial enterprises. The following example can illustrate this point. There are about ten iron and steel enterprises in my country with an annual output of 10 million tons of steel. The entire logistics process of an enterprise with an annual output of 10 million tons of steel is like this. Starting from mining, it needs nearly 60 million tons of raw ore from self-production to outsourcing. From self-provided mines (within ten), outsourcing small ore mines (a large number), the large ore mined is coarsely, medium, and finely crushed into small pieces, and then ball milled many times.
The powder with a particle size of 200 meshes is subjected to magnetic, flotation, and gravity separation to eliminate SiO2 and select Fe3O4 or Fe2O3 iron ore concentrate. At this time, 60 million tons of raw ore will form 20 million tons of iron ore concentrate. It is discharged as tailings (the tailings also contain less than 10% iron). The general number of concentrators is three or five. In the sintering process, a large number of ingredients will be dissolved, such as limestone, fluorite, coal, white ash, blast furnace ash and so on. At this time, the corresponding output is more than 20 million tons, and the weight of limestone, white ash, coal, etc. added in it is also in the order of several million tons or more and less. The sintering ore is used for iron smelting and nearly 5 million tons of coke and 1.5 million tons of pulverized coal (blast furnace pulverized coal to save coke). After smelting, more than 10 million tons of molten iron are produced. Most of this 10 million tons of molten iron is sent to the smelting smelter. In the steel plant (part of it is sold as pig iron), smelting and out-of-furnace refining are completed by adding scrap steel, alloy materials, and auxiliary materials in the steel plant. At this time, the scale production of 10 million tons of steel is completed, and then continuous casting to slabs , Square billet, round billet, for rolling mills to roll into various types, materials, and specifications of steel such as plates, tubes, wires, corner grooves, etc. The amount is less than 10 million tons, of which sintering, ironmaking, smelting A large number of auxiliary materials, auxiliary materials, oxidizers, reducing agents, stabilizers, etc. are converged in the steel process, and the steel rolling is the largest diversion, and the heavy task of the weighing instrument is entrusted to weigh more weight information. In such a steel enterprise with an annual output of 10 million tons of steel, according to its large processes and small processes, one step at a time, a total of 20 mainstream weighing and nearly a hundred total weighing processes are required for tributary measurement and mainstream weighing. The amount of weighing instruments required and the frequency of use of each weighing instrument, because all processes from mining to steel rolling in the steel industry are continuously operated 24 hours a day, and the main line workers are shifted.
To sum up, the steel industry deserves to be the most complex and the largest industry in logistics. This complex logistics network provides a huge market for the weighing instrument industry, and is also a battlefield and test field for the weighing instrument industry. In the past ten years, the big names in the weighing instrument industry have also actively poured into the steel industry to participate in the construction of information flow that accompanies logistics.
- Weighing instrument measurement is the mainstream of the information flow of the iron and steel industry
In the process of production, operation and management of iron and steel enterprises, from the initial mine production dispatch center to a series of factories and mines production command centers such as ore dressing, sintering, ironmaking, steelmaking, steel rolling, and even the general production command center of the head office, it is based on daily or even real-time Output and quality data direct production, and the flow of information measured by weighing instruments guides the smooth flow of logistics. It is a weighing instrument that provides real-time output, shift output, daily output, monthly output, annual output and other data information of various mines and imported ores, iron concentrates produced by various concentrators, and sintered ore produced by various sintering plants. Provides the molten iron from the iron plant, the molten steel and the billet from the steel plant, the shift production, daily production, monthly production, and annual production of various steel products in each rolling mill, and also includes a large number of purchased raw materials, fuels, auxiliary materials, and auxiliary materials into the logistics Main line weighing instrument measurement information. In addition to the mainstream information, there is also a lot of influx of tributary logistics information, such as the influx of dozens of ingredients in sintering ingredients, the influx of coke as a reducing agent in ironmaking, the influx of pulverized coal injection, and the influx of The influx of scrap steel, alloy materials, and various auxiliary materials. These information measured by weighing instruments are the most important information that participates in the whole process of steel smelting, and participates vigorously in the whole process of steel production in large weighing instruments. At the same time, as a branch of weighing instruments: balances are also testing its chemical composition, the most important quality information throughout the whole process (the whole process of steel production). Wherever large weighing instruments go, wherever the balance goes. Iron ore alone needs to be tested for its geological grade, mined grade, overflow grade, etc., and then the chemical composition of iron ore concentrate, pellets, sintered ore, molten iron, coke, molten steel, steel, etc., is tested more than once. In addition to the chemical composition testing of a large number of auxiliary materials, these quality information streams are also the main information of the iron and steel industry. Also in the iron and steel industry, weighing instruments are not only used as mainstream information for production and operation, quality management and control, but also as automatic control and safety. Production and control of important information on environmental protection and energy consumption.
- Weighing instrument is the lifeline of the steel industry
There is a reason to elevate the role of weighing instruments in the steel industry to such a position. This principle is accepted by many managers at all levels in the steel industry. When the logistics flows in and out of the steel industry, capital will flow out and inflow. Iron and steel enterprises, and weighing instruments are the flow meters of logistics. The large amount of material flow means the large amount of funds. Therefore, some people say that the weighing machine is a “money counter” or a “money box.” As far back as the 1970s, when the quality and quantity of our weighing instruments were close to expectations, a scale often determined the fate of an enterprise. Even now key weighing instrument positions also determine the level of profitability and even loss of factories and mines. Of course, managers of the steel industry We have always attached importance to weighing instruments and weighing measurement. In addition to the role of the balance in the iron and steel industry, the balance evaluates the chemical composition of the raw material, and also detects the composition or quality of the manufactured steel. It determines the quality or inferiority of the product and raw materials, and also determines the quality and waste. Then the balance and the large weighing instrument are matched with one equivalent to the unit price, one equivalent to the quantity, and the positive one is the corresponding capital, which shows its true character as a “money counter”.
The steel industry is an enterprise with high resource consumption and high energy consumption, while the price of purchased ore is rising sharply, and the price of coal is also rising. It is also a high-pollution, high-performance enterprise. If you don’t plan carefully, there will only be a loss. Weighing instruments must be placed at each delivery point of logistics, and the best scales must be installed in all the most important positions externally, because the external weighing rod is hard, but the waist rod is hard. The metering of the in and out of the internal material yard, trough, and silo, and the measurement of the beginning and the end of the bulk material transportation (to prevent running and dripping). The weighing instrument should detect the subtle logistics links. In such a high resource consumption, high energy consumption, and high cost industry, it would be unthinkable without the gatekeeper of weighing instruments.
The role of weighing instrument is not only that, weighing instrument runs through the whole process of steel production, although the process is very long, and runs through every corner, although it is very wide, and penetrates into every subtlety, even though it is very deep. It is step by step, fortified at all levels, production is inseparable, quality is indispensable, safety and environmental protection are indispensable, and it supports half of the energy metering industry. It is also a big helper of automation and the absolute main force of informationization. In the whole process of steel production, thousands of data measured by weighing instruments maintain the normal operation of steel enterprises, and modern management comes from the weighing instrument measurement information network, and each weighing instrument measurement data has its own connotation. Play their respective roles. Therefore, without weighing, this large system engineering of the steel industry will be difficult to operate. Specifically, from ore mining, transportation to coarse crushing, medium crushing, and fine crushing, from the multiple return of balls in the concentrator to the output of iron concentrate, from the batching of ten kinds of materials into pellets to sintering, from Blast furnace coke and sintered ore are smelted into the furnace to the molten iron is discharged, from the molten iron into the converter of the steel plant, to the molten steel smelting, out-of-furnace refining to rotary ladle and tundish to continuous casting, and finally the output of hundreds of steel products. Hundreds of main materials, auxiliary materials and auxiliary materials. The weighing instrument runs through every vertical detail, goes deep into workshops, classes, and machines, and radiates horizontally to the integration of various raw materials, ingredients, and auxiliary materials and the corresponding quality indicators (completed with the participation of the balance). It not only involves external supply and marketing costs and output value, but also involves inter-plant settlement, workshop-level assessment, and team and individual production capacity. At the same time, it is ensuring that the crushers, ball mills, sintering machines, vehicles, hot metal delivery, furnace sealing, and ladle can operate safely under full load without overloading. In environmental protection work, dust sampling is used to determine the level of dust pollution. The level of dust pollution is the most important indicator of a steel plant, and it is also inseparable from a balance in dust testing. There are many large and small stock yards and silos in the production link of steel enterprises. The weighing of these raw materials is also the intermediate link of production management and operation. Among them, the stock yards and silos are company-level and factory-mining-level. , Workshop-level, etc. In the production system, it plays the task of buffering and guaranteeing continuous production. Its entry and exit are inseparable from the measurement of weighing instruments……. All of this shows that weighing instruments are ubiquitous and available in the steel industry all the time. It is called a hundred sources of input and measures thousands of household materials. It is like a complete neural network distributed in the entire body of the steel giant, which determines the steel industry. fate.
Fourth, the most weighing instrument in the steel industry
The iron and steel industry is a large-scale exhibition of industrial weighing instruments. There are many types of exhibitors, a large area of exhibition booths, a long exhibition period, and the exhibition will never be dismantled. Exhibited the most industrial weighing instruments unmatched by other industrial sectors.
- The steel industry is equipped with the largest variety and number of weighing instruments
Weighing instruments in the iron and steel industry serve steel in the four-dimensional field, along the main production process from mining to the delivery of steel; in the horizontal direction, all auxiliary materials and auxiliary materials enter the main line from the branch line; in terms of depth, iron is the main line regardless of the vertical main line. The detection of the chemical composition of the main material to the auxiliary material of the horizontal branch line; and the continuous operation of 24 hours to year after year in time, you can imagine the large amount and variety of weighing instruments. In the world of the steel industry, there are weighing instruments in the sky, the middle and the ground, and there are crane scales, crane scales, hook scales, etc. in the sky; there are chain scales, coal powder scales, belt scales, hopper scales, and plate flow meters in the middle. ; On the ground, there are various weighing instruments, railroad scales, truck scales, platform scales, steel scales, raceway scales, and batching scales that can be seen everywhere. These scales range from several types to dozens of types. For the rail scale, there are general rail scales such as single-top, double-top dynamic rail scale, and static rail scale. Wide-gauge railway scale in a steel plant
(Coking plants and rolling mills also have them), narrow-rolled rail scales for underground mines, extra-large molten iron rail scales and torpedo rail scales, foundationless rail scales, continuous rail rail scales, track patch long rail rail scales, rail-mounted sensor rail scales, Steinney bridge type railway scale, axle pin embedded sensor railway scale, track plate sensor railway scale, and the railway scale composed of the above two groups, etc., and other types can also have many forms such as truck scale, platform scale, belt scale, crane scale, etc. , The number and variety of the most need not go into details.
- The largest weighing instrument in the steel industry
Mine truck scales with a capacity of 300 tons or more, large belt scales for mines with a flow rate of 8,000 tons per hour, and 800 tons
Hot metal torpedo car dynamic and static rail scale, ladle crane electronic scale weighing 450 tons, and ton scale used to verify large scale weighing instruments. These are not available in other industrial sectors.
- The steel industry has the largest number of balances
The balance is accompanied by the whole process of steel production, whether it is vertical or horizontal, a process requires multiple tests, such as the geological grade in the mining, the extracted grade, the overflow grade, the iron ore concentrate in the factory, and the transportation (car Up-sampling), three tests at the sintering plant, and the number and variety of tests required for sintering, ironmaking, and steelmaking will be more and more complicated, so the amount of balance required is also larger. At the same time, balances in the steel industry have a large measuring range. Large balances can test ton-level weights, small balances can test milligram-level weights, or even 100 micrograms weights. In addition, large scales have a range of hundreds of tons. They are used in the steel industry. The scale of the weighing instrument here is the largest, that is, 10-7～106 kg, which spans 13 orders of magnitude.
- The working environment of weighing instruments in the steel industry is the cruelest and worst
High temperature, high impact, high electromagnetic interference, high humidity, high dust, etc., high temperature electronic scales work near molten iron at 1200℃～1500℃, or near molten steel at 1400℃～1600℃, the impact load is more than three times the rated load , The molten steel overflows and burns, the crane crosses and dislocations, etc., the environment is extremely harsh. In the vicinity of weighing instruments with better working environment, there is often a bad humanistic environment. Some people have studied many ways to make the scale higher or lower according to their needs. Therefore, anti-counterfeiting, anti-theft, and anti-cheating electronic scales have appeared. For this reason, steel companies have also paid a price.
- The steel industry is the largest market and the best scientific research base for the weighing industry
In the past ten years, with the great development of the steel industry, the weighing instrument industry has also developed correspondingly. Every year, the sales of weighing instruments in a steel plant by a medium-sized weighing instrument factory is several million or even over ten million. Some of these weighing instrument manufacturers are in the Weighing Instrument Association. There are also a large part of the non-compiled ones. So the total annual sales of weighing instruments in the steel industry is more than several hundred million. Some electronic scales with special working conditions in steel mills have created scientific research and technical personnel in the weighing industry. To this end, they have tackled high-temperature electronic scales, anti-smashing electronic scales, high-temperature sensors, large-scale electronic scales, and quick-install, fast-use, non-stop production electronic scales. In the large scale fair of weighing instruments in the iron and steel industry, elites in the weighing industry have added many excellent products to it.
- Conclusion
Over the past ten years, my country’s iron and steel industry has achieved tremendous development that is unpredictable. Its performance is brilliant and brilliant. At the same time, we have also heard the rapid development of the weighing instrument industry. While people understand how hundreds of millions of tons of steel are made, they should also clearly understand how hundreds of millions of tons of steel are weighed. Those large and small weighing instruments are distributed in all corners of the steel enterprises, and they are familiar with the whole process of steel production like a neural network. It controls the lifeblood of the steel industry from the four-dimensional realm of time and space. For this reason, people will even think of the more brilliant side of the weighing instrument industry. my country’s large, medium and small weighing instrument enterprises have given full play to their expertise and imported a large number of high-quality weighing instruments for the iron and steel industry, guarding countless key positions in the iron and steel industry. Made a huge contribution. With the contributions and performance of these weighing instrument industries, the glory of the steel industry has become even more evident. Godsends the opportunity and cannot be missed. The weighing industry should seize the opportunity to produce more and better industrial weighing instruments to listen to the rapid development of the iron and steel industry. At the same time, the weighing industry itself gets greater development and growth.
