18 Questions
What is the purpose of using GLIDANTS in particulate systems?
To reduce interparticle friction
How can the problem of difficult discharge of fine particles from hoppers be minimized?
By vibration or mechanical stirring
What common issue can arise from fine particles in terms of health and the environment?
Serious environmental and health problems
Which method of agglomeration is referred to as 'granulation'?
Granulation or Agitative Agglomeration
What does the stage of 'Nucleation' involve in agglomeration rate processes?
Fresh particles formed by attrition
What is the main objective of size enlargement in the context provided?
Increased bulk density for storage and tableting feeds
What is the consumption of energy needed to crush the material from an average size of 75 mm to an average size of 25 mm if Kick's law is applied?
25 kW/(kg/s)
What is the power required to crush 100 tons/hour of limestone if 80% of the feed passes a 2" screen and 80% of the product passes a 1/8" screen?
169.6 kW
Which statement best describes the reason for the requirement of size enlargement processes?
To enhance flow properties of bulk materials
In size enlargement processes, what happens to small particles when they are agglomerated into larger masses?
They lose their distinct identity
What property of fine particles increases with a greater reduction in their size?
Specific surface area
Which law states that the energy required for size reduction is directly proportional to the reduction ratio?
Kick's law
What is the main mechanism involved in reduction that leads to breaking or tearing of solids?
Deforming solids by applying diverse forces
Which force involves coarse reduction of hard solids to give fines?
Compression (Nutcrackers)
What is the generic term used for size reduction?
Comminution
Which law proposed that the energy required for size reduction is inversely proportional to the size of some power?
Rittinger's Law
What does the specific energy (E) represent in the context of size reduction?
Energy required per unit mass
Which force is applied in fine pulverization when the size of the product reaches the micrometer range?
Attrition or Rubbing (File)
Explore the process of reducing the size of solids through forces like compression, impact, and attrition. Learn about common applications such as crushing crude materials and grinding synthetic chemicals into powder.
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