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Electric arc furnace hot metal technology applications and optimization

05123l4440015271) conditions to reduce the current until zero. Improved power supply curves in Figure 1. To master the time I ~ fin foot storm a modified power curve 1 on the stove out of a Park actinium actinium furnace melting scrap 2 3 one plus one power against the hot metal furnace molten iron 4 a 5 a waste actinides a power outage Oxygen thermostat 6 7 a 8 a restore power Pa Ying 4.4 arc furnace hot metal refining process optimization effect of the implementation of EAF hot metal aimed at saving energy increase, and the constant optimization of its process can be to increase energy saving effect improved significantly. Main Indicators of the different processes shown in Table 5. Economic evaluation (hot metal charging process and optimize the charging process is not thermal comparison): (1) income item E = CITl + c2 + GL + CTd + C, = 121.87 × 0.45 +1.26 × 9. 5 +63 / 227 × 30 +296 × 150 +63 / 227x18 × 10 = 121.03 元 / t Table 5 Key Indicators situation different process than the production of hot metal smelting smelting electric power when the camera asks consumption consumption refractory metal material consumption% Furnace mInkWlx / tLtktLt 38.651685164398564.056541085 new technology is not the original hot charging process 40,651650185430.404.808201090 01701227520.435.319501073 Zhu: Wei-resistant than the value of the same actinide species T12A. 10 heats where the average decline in the value of c ~ electricity consumption, kWh / t; a price, Yuan / kWhc2 ~ electrode consumption decreased value, kt; an electrode prices,[link widoczny dla zalogowanych], yuan / kgc,[link widoczny dla zalogowanych], ~ wages fall over; T1 one of the original wage take the amount of element c '~ Refractories decreased value, kt; t price of a refractory, Yuan / kg ~ increase in production value, t; L an average profit per ton, RMB / l (2) Increase the amount of oxygen expenditure items × Oxygen Price = 20 / t × O. 49 yuan / m '= 9.80 元 / l hot metal prices higher than the scrap value price of hot metal ratio = × (1150-1020) Yuan / t × 38.65 = 5025 元 / t of metal material consumption increased value × price = 12 × 1020 元 / t = 12.2 '1 yuan / t hot metal transport costs = l0 yuan / t of iron bearing insulation cost = 5 yuan / t increase in total cost of item = (9.80 +50.25 + l2. 24 + l0 +5) RMB / t = 87.29 元 / t (3) Thermal loading effects (with hot metal charging process optimization 『2-cf a [{} 18 22 Danieli Automation Department of Shanghai Metal Shandong Laiwu Steel success of two mill automation system commissioning Danieli Automation Division has successfully completed Level 2 Laiwu Steel mill automation system debugging. The 2 systems with the existing ABB provided by an automated system installed in the rolling unit with on the new system is based on a client server architecture PCs (1 set Pc server and l0 clients),[link widoczny dla zalogowanych], not only to manage the entire process of rolling mill, and so that in the furnace combustion optimization, and thermal equipment installed on the cold materials are applicable. Nieli provided by this thermal loading system, as a complete package, including the l-level automation system. receives heat from two billets continuous casting machine, of which one is the continuous casting machine Danieli provided. Danieli Level 2 automation system has the following functions: the preparation of production plans,[link widoczny dla zalogowanych], production status tracking, mill production management,[link widoczny dla zalogowanych], condition reports, the incoming material storage and export packing library management, preventive maintenance management, integration of thermal loading and loading and so cold. In addition to the mechanical equipment and process control systems integration outside. Danieli The two systems also allows Laiwu Steel benefit in the following areas: ● optimize the mill process management: real-time conditions mainly through the modernization of the system reports to help make the right judgments. in order to make a scientific plan to guide the design and production. This means that downtime can be greatly reduced, re-rolling mill system can significantly reduce the number of configurations. ● improved mill productivity: This is due to a reduction in the downtime. ● save fuel: thermal loading because of management, reducing the stock heat loss. 7 In addition, the label on the final product contains all the information the original blank f that the direction of production provided the end user product quality and reliability improved. At present, this 2f level automation system has been successfully installed on the mill in the world has more than 100 sets. Danieli Automation Division makes this performance among the automation of the world's most experienced company's ranks. Ze in the translated (IRON & STEELaEVI ~ W) l999.1O

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