40 Questions
What is the primary purpose of controlling the flow of metal into the mould through the nozzle?
To ensure center pouring in the mould
What is the consequence of low teeming temperature in ingot casting?
Chocking of the nozzle
What is the primary advantage of continuous casting over ingot casting?
Enhanced yield
What is the purpose of the slide gate system in ingot casting?
To control the flow of metal into the mould
What is the primary reason for preparing the moulds again after stripping off the ingots?
To prepare the mould for the next heat
What is the primary purpose of using lime in the converter?
As a flux
What is the primary safety hazard associated with vacuum degassing systems?
Suction of body parts
What is the purpose of argon purging in a ladle furnace?
To stir the metal
What type of bricks are converter vessels usually lined with?
High alumina bricks
What gas is used for slag splashing in the converter?
Nitrogen
What is the primary reason for ensuring the converter is free from liquid slag before charging?
To prevent damage to the converter lining
What is the purpose of slag arrestors in the BOF process?
To minimize slag carryover to the steel ladles during tapping
What is a critical aspect of quality control in the BOF process?
Composition of the slag and its carryover to the steel ladles
What is a potential hazard associated with water leakage in the lance or hood during the blowing process?
Explosion or fire risk
Why is personal protective equipment (PPE) essential for workers in the steel melting shop?
To protect against metal splashes and heat radiation
What is the primary purpose of the deslagging process after blow finish in the converter?
To remove impurities from the steel
What is the primary use of the slag generated during the steel making operation?
As input feed for BF or Sinter Plant
What is the primary purpose of the argon stirring process in Secondary Steel Making?
To achieve the required properties of steel
What is the primary function of the ladle heating system in steel production?
To increase the temperature of the steel
What is the primary purpose of the vacuum degassing system in steel production?
To remove impurities from the steel
What is the primary purpose of the shroud fixed at the bottom of the ladle collector nozzle?
To prevent the liquid steel from coming into contact with the atmosphere
What is the function of the chillers placed on the DUMMY BAR head?
To solidify the liquid steel quickly
What is the significance of monitoring the difference between the MOULD COOLING WATER Outlet Temperature and Inlet Temperature?
To identify potential hazards during the casting process
What is the purpose of spraying casting powder at a certain mould level?
To create a smooth surface finish
What is the role of the turret arm in the casting process?
To hold the ladle in place
What is the primary reason for solidification at SEN, which restricts the steel flow during casting?
Freezing due to low temperature
Which of the following is NOT a type of defect that can occur during casting?
Ladle nozzle blockage
What is the primary method of cutting the product into ordered lengths after straightening?
Mechanical shearing
What is the primary consequence of Chocking during casting?
Restriction of steel flow
What is the primary purpose of mould cooling temperature control during casting?
To maintain a consistent temperature difference
What is the primary function of scrap in the BOF process?
To act as a coolant in the exothermic process
What is the name of the vessel lined with basic refractory in which the reaction takes place?
BOF Converter
What is the approximate tap-to-tap time in the BOF process?
45-50 minutes
What is the primary function of oxygen in the BOF process?
To remove undesirable elements via oxidation processes
Why is the BOF process called 'basic'?
Because of the type of refractory used
What is the primary advantage of the BOF process over other steel purification processes?
Faster smelting time
What is the primary function of the converter in the BOF process?
To achieve compositional adjustments
What is the approximate percentage of carbon in the hot metal used in the BOF process?
4% carbon
What is the primary function of the lance in the BOF process?
To blow oxygen into the converter
What is the significance of the name 'LD' in the BOF process?
It stands for Linz and Donawitz, two cities in Austria
Test your knowledge of safety hazards in primary steel making and secondary steel units. Learn how to avoid water leakage, CO gas exposure, and metal splashes that can cause burn injuries and electrocution.
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