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Specific Gravity - Materials and Heat Balance in Metallurgical Processes - Lecture Notes, Study notes of Materials Physics

Amity University - BiharMaterials Physics

Some concept of Materials and Heat Balance in Metallurgical Processes are Gaseous Fuel, Gassification Material, Heat Content Data, Furnace, Imperial Smelting Process, Imperial Smelting Process. Main points of this lecture are: Specific Gravity, Slurry, Specific Gravity, Quiz Question, Specific Gravity, Slurry Stream, Quartz, Calculate Density, Mass Flow, Flow Rate

Typology: Study notes

2012/2013

Uploaded on 04/26/2013

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Lecture3:Exerciseonmeasurementofquantities.
Content
Exercise(i)Specificgravityofslurry
Exercise(ii)%solidsinslurry
Exercise(iii)Mixingofslurrystreams
Exercise(iv)Slurrymaking
Exercise(v)Units
Exercise(vi)Quizquestion
Exercise–(I)specificgravityofslurry
Calculatespecificgravityofslurrywhichcontains65%lime.Thespecificgravityoflimeis2600kg/m3.
Alsocalculatevolumeofslurry.
Substitutingthevaluesinequation1oflecture2
65 󰇛 󰇜
󰇛󰇜 
Bysolvingρspecificgravityofslurry1
667 

Volumeofslurryinpercent65
 41.66%
% solid 󰇛%x󰇜󰇛󰇜
󰇛󰇜

Exercise–(II):%solidsinslurry
Aslurrystreamcontainingquartzisdivertedintoa1litercan.Timetakentofillis8seconds.The
densityoftheslurryandquartzis1400kg/m3and2600kg/m3respectively.Calculate(a)percentsolids
byweightand(b)massflowratequartzwithinslurry.
Substitutingthevaluesinequation1oflecture2


 
=45.88%.
Equation3oflecture2
M󰇛kg/hr󰇜F󰇛󰇜
󰇛󰇜

pf3

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Download Specific Gravity - Materials and Heat Balance in Metallurgical Processes - Lecture Notes and more Study notes Materials Physics in PDF only on Docsity!

Lecture 3: Exercise on measurement of quantities. Content Exercise (i) Specific gravity of slurry Exercise (ii) % solids in slurry Exercise (iii)Mixing of slurry streams Exercise (iv)Slurry making Exercise (v)Units Exercise (vi)Quiz question Exercise – (I) specific gravity of slurry Calculate specific gravity of slurry which contains 65% lime. The specific gravity of lime is 2600 kg/m^3. Also calculate volume of slurry. Substituting the values in equation 1of lecture 2 65 ൌ ଵ଴଴ൈଶ଺଴଴ሺ஡ౣି஡ౣ ሺଶ଺଴଴ିଵ଴଴଴ሻ^ ଵ଴଴ሻ

By solving ρ (^) ୫ ൌ specific gravity of slurry ൌ 1 (^667) ୫୩୥య Volume of slurry in percent ൌ 65 ൈ ଵ଺଺଻ଶ଺଴଴ ൌ 41.66%

% solid ሺ%xሻ ൌ ଵ଴଴ൈ஡஡ౣ ౩ሺಙ౩షభబబబሻ^ ሺ஡ౣି^ ଵ଴଴଴^ ሻ

Exercise – (II): % solids in slurry A slurry stream containing quartz is diverted into a 1 liter can. Time taken to fill is 8 seconds. The density by weight of (^) andthe slurry(b) mass and flow quartz rate is quartz 1400 kg/m within^3 and slurry. 2600 kg/m^3 respectively. Calculate (a) percent solids

Substituting the values in equation 1 of lecture 2

Equation 3 of lecture 2 Mሺkg/hrሻ ൌ F஡ሺ஡^ ౩^ ሺ஡ౣି (^) ౩ି ଵ଴଴଴^ ଵ଴଴଴ ሻ^ ሻ

F ൌ ଷ଺଴଴଼଴଴଴ mଷ^ ⁄hr M ൌ ଷ଺଴଴଼଴଴଴

Mଵ ൌ 1364 kg mଷ^ and

=289kg/hr. If the time to fill the can is 7s,rest everything remains the same, calculate mass flow rate of quartz in slurry. Answer =330 kg/hr Exercise (III) Mixing of slurry streams Two slurry streams enter a pump. One stream has flow rate of 5m^3 /hr and contains 40% solids by weight. 3000kg mOther‐ (^3) in bothstream slurry has streams.3.4 m^3 /hr Calculate flow rate tonnage and contains of any 55% solids solids pumped/hr. by weight. Density of solid is

To solve the problem, use the following steps.

1. Calculate density of slurry streams ρ ൗ 1579 ୫୩୥య

ଵ ൌ 2728 and Mଶ ൌ 2953

Calculate how many kg of magnetite must be added to 100kg water to make up a slurry with specific ୫ Specific gravity of Feଷ O4 ൌ 5.2g/cmଷ Wt % solid =ଵ଴଴ൈହ.ଶ ሺଵ.ସିଵሻଵ.ସൈሺହ.ଶିଵሻ

2. Calculate mass flow rate of slurry M kg hr⁄

3. Add mass flow rate which will give 5.681T/hr.

Exercise (IV) Slurry making

gravity ሺρ ሻ ൌ 1.4. g/cmଷ.

ൌ ଵ଴଴ൈହ.ଶൈ଴.ସଵ.ସൈସ.ଶ ൌ 35.4 %. Wt % water =100 – 35.4=64.6 %

୫ୟୱୱ୭୤ ୵ୟ୲ୣ୰^ ୲୭୲ୟ୪ ୫ୟୱୱ^ ൌ ౣ^ M^ M Hమ^ Oൌ^ ଺ସ.଺%^ ଵ଴଴%

M୫ ൌ ଵ଴଴%଺ସ.଺% ൈ 100

=155kg Mass of magnetite =155‐ 100 =55kg