40 Questions
What is the primary requirement to achieve maximum output at the lowest operating cost in a steel plant?
High-quality raw materials
How are the samples prepared for further analysis in the quality control process of raw materials?
By quartering and coning
What is the minimum percentage of Fe required in Iron Ore Lump for blast furnace operation?
62.3-63.2% min
What is the maximum percentage of SiO2 allowed in Dolomite (BF) grade?
2.3-3.6%
What is the minimum percentage of Mn required in Mn Ore for steel production?
30% min
What is the primary objective of crushing and screening of coke/flux in a sinter plant?
To prepare the base mix and sinter mix
What is the recent trend in iron ore usage in Blast Furnace operation?
Utilizing low-grade iron ores, fines, and industrial wastes
What is the primary source of Mill Scale and Flue dust?
Generated inside the plant
Which of the following is not a type of limestone used in the sinter plant?
Pellet grade Limestone
What is the primary purpose of dispatching processed inputs to customer units?
To ensure timely delivery of raw materials to the customer units
What is the primary function of the Traffic Department in the plant?
Coordinating movement of foreign wagons
What determines the number of layers in a bed?
Stacker speed
What is the significance of the number of layers in a bed?
It reflects the standard deviation of the bed quality
What type of wagons are typically used for unloading iron ore lumps and fines?
BOXN and BOXC
What is the primary role of the Railways in this process?
Acting as a linkage between mines and the steel plant
What is the primary function of the Wagon Tippler in the RMHP/OHP/OBBP process?
To mechanize the unloading of wagons
What is the maximum percentage of moisture allowed in the Coke Breeze?
15% (max.)
What is the purpose of the Sampling Unit in the Base Mix Preparation Unit?
To take representative samples of the material
What is the function of the Stackers/Cum Reclaimer (SCR) in the RMHP/OHP/OBBP process?
To stack and reclaim materials from the beds
What is the importance of planning Raw Material requirement in the RMHP/OHP/OBBP process?
To ensure smooth operation and avoid setbacks
What is the primary advantage of pellets over sintering in terms of heat consumption?
Approx. 35-40% less heat required
What is the typical range of uniform porosity in pellets?
25-30%
What is the minimum percentage of Fe required in pellets for blast furnace operation?
65%
What is the maximum percentage of Na2O allowed in pellets for blast furnace operation?
0.05%
What is the primary advantage of pellets over sinter in terms of handling and transportation?
Higher strength and resistance to disintegration
What is the maximum percentage of moisture allowed in pellets for blast furnace operation during the fair season?
4%
What is the minimum percentage of particles of size +6.35mm required in pellets for blast furnace operation according to the tumbler test?
94%
What is the maximum percentage of swelling allowed in pellets for blast furnace operation?
20%
What is the primary benefit of high uniform porosity in pellets for blast furnace operation?
Faster reduction and higher metallization
What is the shape of pellets that gives them good bed permeability?
Spherical
What is the primary objective of screening in iron ore lump?
To minimize undersize in iron ore lump
What is the purpose of bedding and blending in the iron ore processing?
To ensure consistency in chemical and physical properties
What is the role of the RMHP/OHP/OB&BP department in the steel production process?
To supply prepared raw materials to units
What is the primary benefit of utilizing metallurgical waste in the steel production process?
To minimize the environmental impact of the steel plant
What is the primary purpose of installing dust extraction and dust suppression systems in the RMHP/OHP/OB&BP department?
To maintain the health and safety of the personnel and equipment
What is the primary purpose of blending in the raw material handling plant?
To homogenize materials from different sources
What is the primary function of the ore bedding and blending plant in relation to blast furnace operation?
To prepare raw materials for iron making
What is the primary objective of screening in the raw material handling plant?
To separate different sizes of iron ore lumps
What is the primary factor that affects the productivity of the sinter plant?
Consistency of raw materials
What is the primary purpose of the raw material handling plant in relation to the blast furnace operation?
To supply raw materials un-interruptedly
Test your knowledge of the different types of raw materials used in steel manufacturing, including iron ore, limestone, and dolomite, and their sources. This quiz covers the preparation of base mix and sinter mix, and the dispatch of processed inputs to customer units.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
