Beneficiation MST
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1. Enhancing quality / property of materials for getting its
higher added value
2. Beneficiation : every process carrying out , mechanically ,
physically for materials to meet the materials specification
required by industries / market
3. Beneficiation : any process which involve no chemical
reaction for getting higher added value
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There are many types of raw materials used in industries :
Classification of these raw materials can be divided into its sources
raw materials come from natural deposits
raw materials come from agro plants product
raw materials come from disposed materials
raw materials come from other industries activities
Classification of raw materials based on its physical appearance
as a solid materials
as a liquid materials
or may be gaseous materials ??
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both crude raw materials and industrial / processed raw materialfirst should be identified according to its nature
Identification includes :
Chemical composition : mole or weight percentage , weight or
mole fraction bases refer to its chemicals compound or its
oxides compound chemical analysis ( volumetric /gravimetric ), analysis using analytical instrument ( AAS ,
GC , GC MS etc.)
This identification means to determine or to distinguish what
are the main chemicals compounds which should be in the
crude or raw material
purification processes ? Physical properties of the crude or raw material :
grain size or particle size screen analysis ?
water content drying processes ?
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chemical compounds bases ( volumetric / gravimetric
analysis , analytical instrument / GC or GS - MS organic
compounds bases)
oxides bases ( Atomic Absorption Spectrophotometer =
AAS inorganic compounds bases )
Can be expressed as a mole bases or weight bases
i
ii
WWWW
WX
++++
=
.......321
icomponentfractionweightXi =
lrawmateriacrudeinicomponentofweightWi /=
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i
i
i mmmm
m
Y ++++=
.......321
icomponentfractionmoleYi =
lrawmateriacrudeinicomponentofmolemi /=
ii
iii
MWXMWXMWXMWX
MWXY
)(.......)()()(
)(
332211 ++++
=
icomponentfractionweightXi =
icomponentofeightmolecularwMWi =
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identification of solid state crude / raw materials usually includes
oxide compounds , by using AAS ( Atomic Absorption
Spectrophotometer dry or wet bases composition ) Al2O3 , SiO2
mineralogy analysis , to determine the existing minerals which
compose the crude / raw material by using XRD instrument
analysis for example : limestone
CaCO3 chemical compound
CaO oxide compound for CaCO3
Calcite mineral form of limestone
Aragonite mineral form of limestone
Clay : AL2O3 2 SiO2H2O : aluminates silicate compound
Al2O3 & SiO2 oxide compounds for clay
kaolinite , montmorilonite, halloysite : minerals of clay
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Identification of minerals using its basal spacing and its 2
value, it means that for specified crystalline form , it has
the fixed basal spacing and specific 2 value.
Basal spacing means the distances whish measured
between crystal lattice surfaces , usually each mineraltype has many basal spacing values , to identify the
minerals needs at least 2 its corresponding basal spacing.
For example: clay minerals
kaolinite mineral has the basal spacing : 7.15 Ao ,
3.566 Ao
and 2.331 Ao
Montmorilonite mineral has the basal spacing :14.7 Ao
4.42 Ao, 1.49Ao
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XRD can be used to identify the minerals qualitatively , just
looking for the basal spacing or its 2 values whichcorrespond to the minerals` basal spacing
Analysis quantitatively using XRD instrument needs the
providing mineral standard. It can be done by comparing
the reflected X-Ray beam counts between the mineral
standard and sample for the same basal spacing or 2values
Comparing the counts of reflected X-Ray of one sample
with others for the same basal spacing or 2 value , can
indicate the relatively mineral content. The higher the
counts means having the higher mineral content
Keep in mind : XRD method analysis is suitable only for
crystalline minerals , not for amorphous minerals
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no particles in industries having single size
the size of these particle should be noted as ranges of its
size
Usually particle sizes in term of Mesh size , mesh screen
Tyler standard wire mesh
Mesh definition : for smaller particles , Mesh is define as a number of
holes each square inch of wire mesh
wire
1 inch
1 inch
hole
Mesh : 100
there are 100 holes
each square inch
Screen aperture :
the diameter / the
opening of each hole in mesh
screen
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standard screen system , means that in each
system consists of several mesh-screens, whichits aperture is orderly specified
An = aperture of the nth screen from the top of
the screen arrangement
An+1
= aperture of the (n+1)th screen from the top
of the screen arrangement
An = 2 An+1
Mesh number : 100
A100 = 0,147 mmMesh number : 150 A150 = 0,104 mm
The diameter / size of particle which
retained 150 Mesh and through 100 Mesh
should be noted as : - 100 + 150 Mesh