فهرست مقالات Blast furnace

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  1 - Nonlinear Optimization of Hot Metal Profit in Blast Furnace Based on the Decrease of Coke Consumption Rate Case Study: Esfahan Steel Company
  Mehdi Nasr-Azadani sayyed mohammad reza davoodi Shahram Moeeni
  Due to the low quality of domestic coking coal, as well as increased restrictions on international trade of importing coking coal from abroad, Iranian steel industry have been faced with the serious challenges of supplying coke as the major source of blast furnaces ener چکیده کامل

  Due to the low quality of domestic coking coal, as well as increased restrictions on international trade of importing coking coal from abroad, Iranian steel industry have been faced with the serious challenges of supplying coke as the major source of blast furnaces energy; on the other hand, the vast sources of domestic natural gas and pulverized coal have made it possible to replace coke with these sources of energy in the blast furnaces. High differences in price of coke with natural gas and pulverized coal, the influence of replacing complexity on the cost of ferrous raw materials, coke, and energy consumption, blast furnace productivity, technical constraints, and carbon dioxide emissions level are the main reasons for conducting this research. In this study, a nonlinear optimization model was developed to determine the profit of hot metal in blast furnace. Compared to previous studies, optimal decision making on the supply and replacement of raw materials and energy, along with new constraints were analyzed. The proposed model was implemented in MATLAB and validated by using data of Esfahan Steel Company. The results revealed that the research model can decrease coke consumption by 26% and is strongly effective in attaining economic benefits. پرونده مقاله
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  2 - Experimental Study of Modulus of Elasticity, Capillary absorption of water and UPV in Nature-Friendly Concrete Based on Geopolymer Materials
  Mohammadhossein Mansourghanaei Morteza Biklaryan Alireza Mardookhpour
  10.1007/ijase.2023.698294
  In the current study, granulated blast furnace slag (GBFS) based geopolymer concrete (GPC) was used with 0-2% polyolefin fibers (POFs) and 0-8% Nano silica (NS) to improve its structure. After curing the specimens under dry conditions at a temperature of 60 °C in an چکیده کامل

  In the current study, granulated blast furnace slag (GBFS) based geopolymer concrete (GPC) was used with 0-2% polyolefin fibers (POFs) and 0-8% Nano silica (NS) to improve its structure. After curing the specimens under dry conditions at a temperature of 60 °C in an oven, they were subjected to Modulus of elasticity and Ultrasonic Pulse Velocity (UPV) tests to evaluate their mechanical properties, as well as Capillary absorption test to assess their durability. all tests were performed at 7 and 90 days of age at ambient temperature (20 ℃). The addition of NS enhanced the whole properties of the GBFS based GPC. Increasing the curing age improved the results of all tests. The results of all tests in GPC showed the superiority of the results over conventional concrete. At 28 days of curing age, the addition of up to 8% NS to the GPC composition improved the modulus of elasticity test results by 14.7%, UPV by 84.88% and capillary water uptake by 64.38%. Addition of up to 2% of POFs to the GPC composition improved the modulus of elasticity by up to 7.21%, capillary water uptake by up to 22.97% and decreased UPV by up to 8.77%. In the following, by conducting the SEM test, a microstructure investigation was carried out on the concrete samples. In addition to their overlapping with each other, the results indicate the GPC superiority over the regular concrete. Besides, it demonstrated the positive influence of NS addition on the concert microstructure. پرونده مقاله