Electric arc furnace smelting process control method based on furnace gas analysis
A technology of smelting process and control method, which is applied in the field of electric arc furnace steelmaking, can solve problems such as difficult temperature rise and decarburization of molten steel, and the composition of molten steel does not meet the requirements, so as to achieve the effects of reduced smelting power consumption, improved hit rate, and reduced consumption
Inactive Publication Date: 2012-03-21
UNIV OF SCI & TECH BEIJING
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Problems solved by technology
The decarburization and temperature rise of molten steel are carried out at the same time. It is difficult to coordinate the temperature rise and decarburization of molten steel in actual production. It often occurs that the temperature of molten steel or the composition of molten steel at the end of smelting does not meet the requirements. Smelting situation, determine the next step of smelting operation
Iron and steel enterprises use thermocouples to measure the temperature of molten steel, use samplers to obtain molten steel samples, and then use rapid detection methods to analyze the chemical components in the samples. This method can only detect the temperature and components in the electric arc furnace at a certain time
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[0024] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.
[0025] like figure 1 , figure 2 , image 3 As shown, a kind of electric arc furnace smelting process control method based on furnace gas analysis of the present invention specifically comprises the following steps:
[0026] Step 1: Install a furnace gas temperature measuring instrument and a water-cooled sampler at the fourth hole of the electric arc furnace, install a furnace gas flowmeter on the flue, and the water-cooled sampler passes through the flue gas cooling device, the flue gas purification device, and the gas pipeline to communicate with the gas The analyzer is connected; the furnace gas temperature measuring instrument, the gas analyzer and the furnace gas flowmeter are connected to the PLC, the PLC is connected to the host computer, the main program is initialized, and the data storage database is loaded;
[0027] Step 2: The ...
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The invention belongs to the field of electric arc furnace steelmaking, and relates to an electric arc furnace smelting process control method based on furnace gas analysis. An electric arc furnace molten steel ingredient temperature forecasting method comprises continuously detecting the ingredients, the temperature and the flow of electric arc furnace gas, computing the dephosphorization speed,the decarbonization heat release speed and the heat loss speed of an electric arc furnace in real time, further computing and forecasting the ingredients and the temperature of molten steel in the electric arc furnace, and dynamically adjusting power supply strength and oxygen supply flow in real time according to the forecast data of the ingredients and the temperature of the molten steel in theelectric arc furnace so as to make molten steel decarbonization and molten steel warming in the electric arc furnace conduct coordinately. The method disclosed by the invention has the beneficial effects that the control method reduces the average smelting power consumption of the electric arc furnace by 3%, and reduces the oxygen consumption per ton steel by 5%, the smelting endpoint temperatureand ingredient double hit rate of the electric arc furnace is increased by 10%, and the consumption of metal material is reduced by 2%.
Description
technical field [0001] The invention belongs to the field of electric arc furnace steelmaking, and relates to a method for predicting the composition and temperature of molten steel in the steelmaking process of a 20-150t DC or AC electric arc furnace and a method for controlling the smelting process based on the prediction results. Background technique [0002] Modern electric arc furnace steelmaking uses electric energy and oxygen to act together on the metal raw materials in the furnace body, and finally produces molten steel with a composition temperature that meets the requirements. The decarburization and temperature rise of molten steel are carried out at the same time. It is difficult to coordinate the temperature rise and decarburization of molten steel in actual production. It often occurs that the temperature or composition of molten steel at the end of smelting does not meet the requirements. It is necessary to grasp the temperature in the molten pool by means of ...
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IPC IPC(8): C21C5/52
CPCY02P10/20
Inventor 朱荣董凯杨凌志吕明毕秀荣魏鑫燕
Owner UNIV OF SCI & TECH BEIJING
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