CH1-RMHP-gpoe_2024
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Questions and Answers

What is the primary requirement to achieve maximum output at the lowest operating cost in a steel plant?

  • Advanced manufacturing technology
  • Skilled labor and efficient management
  • Optimized production schedules
  • High-quality raw materials (correct)
  • How are the samples prepared for further analysis in the quality control process of raw materials?

  • By magnetic separation and flotation
  • By quartering and coning (correct)
  • By crushing and grinding
  • By sieving and filtering
  • What is the minimum percentage of Fe required in Iron Ore Lump for blast furnace operation?

  • 65% min
  • 62.3-63.2% min (correct)
  • 58% min
  • 60% min
  • What is the maximum percentage of SiO2 allowed in Dolomite (BF) grade?

    <p>2.3-3.6%</p> Signup and view all the answers

    What is the minimum percentage of Mn required in Mn Ore for steel production?

    <p>30% min</p> Signup and view all the answers

    What is the primary objective of crushing and screening of coke/flux in a sinter plant?

    <p>To prepare the base mix and sinter mix</p> Signup and view all the answers

    What is the recent trend in iron ore usage in Blast Furnace operation?

    <p>Utilizing low-grade iron ores, fines, and industrial wastes</p> Signup and view all the answers

    What is the primary source of Mill Scale and Flue dust?

    <p>Generated inside the plant</p> Signup and view all the answers

    Which of the following is not a type of limestone used in the sinter plant?

    <p>Pellet grade Limestone</p> Signup and view all the answers

    What is the primary purpose of dispatching processed inputs to customer units?

    <p>To ensure timely delivery of raw materials to the customer units</p> Signup and view all the answers

    What is the primary function of the Traffic Department in the plant?

    <p>Coordinating movement of foreign wagons</p> Signup and view all the answers

    What determines the number of layers in a bed?

    <p>Stacker speed</p> Signup and view all the answers

    What is the significance of the number of layers in a bed?

    <p>It reflects the standard deviation of the bed quality</p> Signup and view all the answers

    What type of wagons are typically used for unloading iron ore lumps and fines?

    <p>BOXN and BOXC</p> Signup and view all the answers

    What is the primary role of the Railways in this process?

    <p>Acting as a linkage between mines and the steel plant</p> Signup and view all the answers

    What is the primary function of the Wagon Tippler in the RMHP/OHP/OBBP process?

    <p>To mechanize the unloading of wagons</p> Signup and view all the answers

    What is the maximum percentage of moisture allowed in the Coke Breeze?

    <p>15% (max.)</p> Signup and view all the answers

    What is the purpose of the Sampling Unit in the Base Mix Preparation Unit?

    <p>To take representative samples of the material</p> Signup and view all the answers

    What is the function of the Stackers/Cum Reclaimer (SCR) in the RMHP/OHP/OBBP process?

    <p>To stack and reclaim materials from the beds</p> Signup and view all the answers

    What is the importance of planning Raw Material requirement in the RMHP/OHP/OBBP process?

    <p>To ensure smooth operation and avoid setbacks</p> Signup and view all the answers

    What is the primary advantage of pellets over sintering in terms of heat consumption?

    <p>Approx. 35-40% less heat required</p> Signup and view all the answers

    What is the typical range of uniform porosity in pellets?

    <p>25-30%</p> Signup and view all the answers

    What is the minimum percentage of Fe required in pellets for blast furnace operation?

    <p>65%</p> Signup and view all the answers

    What is the maximum percentage of Na2O allowed in pellets for blast furnace operation?

    <p>0.05%</p> Signup and view all the answers

    What is the primary advantage of pellets over sinter in terms of handling and transportation?

    <p>Higher strength and resistance to disintegration</p> Signup and view all the answers

    What is the maximum percentage of moisture allowed in pellets for blast furnace operation during the fair season?

    <p>4%</p> Signup and view all the answers

    What is the minimum percentage of particles of size +6.35mm required in pellets for blast furnace operation according to the tumbler test?

    <p>94%</p> Signup and view all the answers

    What is the maximum percentage of swelling allowed in pellets for blast furnace operation?

    <p>20%</p> Signup and view all the answers

    What is the primary benefit of high uniform porosity in pellets for blast furnace operation?

    <p>Faster reduction and higher metallization</p> Signup and view all the answers

    What is the shape of pellets that gives them good bed permeability?

    <p>Spherical</p> Signup and view all the answers

    What is the primary objective of screening in iron ore lump?

    <p>To minimize undersize in iron ore lump</p> Signup and view all the answers

    What is the purpose of bedding and blending in the iron ore processing?

    <p>To ensure consistency in chemical and physical properties</p> Signup and view all the answers

    What is the role of the RMHP/OHP/OB&BP department in the steel production process?

    <p>To supply prepared raw materials to units</p> Signup and view all the answers

    What is the primary benefit of utilizing metallurgical waste in the steel production process?

    <p>To minimize the environmental impact of the steel plant</p> Signup and view all the answers

    What is the primary purpose of installing dust extraction and dust suppression systems in the RMHP/OHP/OB&BP department?

    <p>To maintain the health and safety of the personnel and equipment</p> Signup and view all the answers

    What is the primary purpose of blending in the raw material handling plant?

    <p>To homogenize materials from different sources</p> Signup and view all the answers

    What is the primary function of the ore bedding and blending plant in relation to blast furnace operation?

    <p>To prepare raw materials for iron making</p> Signup and view all the answers

    What is the primary objective of screening in the raw material handling plant?

    <p>To separate different sizes of iron ore lumps</p> Signup and view all the answers

    What is the primary factor that affects the productivity of the sinter plant?

    <p>Consistency of raw materials</p> Signup and view all the answers

    What is the primary purpose of the raw material handling plant in relation to the blast furnace operation?

    <p>To supply raw materials un-interruptedly</p> Signup and view all the answers

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