3rd Sem/Metallurgy/2021
Sub-Mineral Processing
1. 2 Marks Q&A
a. Name any for Minerals that are found in Odisha with their location?
Ans-Mineral is known as the natural occurring substance that contains metal and their compounds. Odisha is known as the one of the major state of Minerals reserves. The Main Recourse of Minerals are the Iron Ore, Bauxite, Chromite and Coal.
b. Define Comminution Operation.
Ans-Comminution is the process of reduction of solid material particles size by Grinding, Milling or any similar Process. Comminution is generally used to produce nano materials(Powder) from larger size of bulk material.
c. Write the Scope of Mineral Dressings.
Ans-Mineral Dressing is also known as Mineral processing or Ore dressing. The main purpose of this process is to separate value able minerals from the ore for commercial application.
Mineral Dressing includes 1.Elementing unwanted chemical species
2.Increasing the metal content of the Ore
3.Decreasing the gaunge content
4.Providing the raw material for country infrastructure and development.
d.What is reduction Ratio?
Ans-In Mineral Processing Reduction Ration(R) is the ratio of average feed size to the Product size. It is always greater than one. The reduction ration is the size of the crusher breakdown feed material into.
Its tell you how big a pieces of material you can feed into the crusher for it to break it into the desired size.
e.Define Rittinger's Rule?
Ans-Rittinger's Rule state as the Energy Required for the reduction of particle size of a solid is directly Proportional to the increase in surface area. E = K Rf c(1/L 2– 1/L 1)
f. What is Run of Mine?
Ans- Run of Mine is also known as ROM.It is basically the unprocessed mine Mineral it is also refers to the average grade of ore produced from the mines. ROM is made up of Soil, Rock, Minerals, Contamination and Impurities.
g. Define Ball Load.
Ans-Ball mill is a grinding machine that use ball to reduce the size of the ore particles. The Balls are charged into the mills with the material to be ground. The mills Rotate in the horizontal axis and the balls drop from the top of the rotating shell.
h.Write Taggart's formula for Gyrotory Crusher.
Ans-As per the Taggart , the Empirical formula for capacity of Gyrotory Crusher is T=0.6LS Where T is the capacity of the crusher expressed in Ton per Hour. L is the length or the width of the receiving opening in inches. S is the shutter width for discharge opening in inches.
i.Write Stoke's Law
Ans-Stoke's Law describes the viscus drag force acting on spherical particles moving through the fluid.
It states that the drag force is directly proportional to the radius of the sphere, the viscosity of the fluid , and the viscosity of the sphere relative to the fluid.
j. What is the role of collector?
Ans-The Basic Purpose of the collector is to select from a hydrophobic layer on a given mineral surface in the flotation pulp and thus provide condition for the attachment of the hydrophobic particles to air bubbles and recovery of such particles from the froth products.
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