Mining

Question 1

what is isomorphism

Answer 1

1 atom in the structure is replaced by a similar one without affecting atomic structure

Question 2

what is polymorphism

Answer 2

same chemical composition but different crystal structure

Question 3

what do you do during prospecting

Answer 3

chemical composition, HCL solubility, brightness. Mineral evaluation (XRD, microscopy, SEM).

Question 4

What is the mining process

Answer 4

prospecting
drilling and blasting
primary crushing and screening
wet beneficiation
washing
tumbling
flotation
thickening
coarse grinding
fine grinding

Question 5

What is the most energy intensive beneficiation step

Answer 5

tumbling/autogenous mill

Question 6

why do we use wet grinding for papermaking minerals

Answer 6

for the finer particles we use it takes less energy than dry grinding

Question 7

what chemical additives could you add to the wet beneficiation process

Answer 7

grinding aids
dispersing aids
flocculation aids
bleaching
biocides

Question 8

What are advantages and disadvantages of sand grinding

Answer 8

+:low capex and common technology.
-: lower grinding efficiency
need series