hopper slide 2.0.pptx

7/26/2019 Hopper Slide 2.0.pptx

1/19

PRODUCTION OF 6000

TONNES PER DAY OF

LIMESTONEBy Addison Juttie, Mohammad Amir Hakim & Wan Ah

Ilham


2/19

ASSUMPTIONS

1. The mine operates over 10 years ith a 1! million"ton output at its li#e runs $!0 days per year ith $ shi#ts per day o# % hours.

$. o emer'en(y stoppa'e o# the pro(ess durin' the produ(tion pe


3/19

HOPPER DESIGN


4/19

DETERMINING THE MINIMUM HOPPOUTLET DIMENSION

)*tain in#ormation #or the hopper desi'n,

+##e(tive #ri(tion an'le,

Material-all inter#a(e #ri(tion an'le,

/rom the and o*tained, e (an determine the #lo #un(tion, #

an'le o# the hopper, .


5/19


6/19

)*tain in#ormation o# the poder o #un(tion

2raph o# 3( versus 3y

With the 4 o*tained previously, a #un(tion (an *e o*tained usin' the r


7/19

GRAPH OF SIGMA Y VERSUS SIGMA

0 10 $0 60 70 !0 80 900

0.!

1

1.!

$

$.!

6

6.!

7

7.!

Powder Flow Function

Sigma C

Sigma Y


8/19

CRITICAL STRESS, SIGMA CRITICA

;riti(al stress, critical can be obtained by

1.The intersection between powder flow function and =/

2.The maximum point or the highest point of the powder flow function if intersection


9/19

SLOPE OF THE HOPPER WALL, H(

With the an'le o# the hopper, o*tained, it then (an *e used to ide

#a(tor determined *y the slope o# the hopper all, H


10/19

MINIMUM OUTLET DIMENSION

The si>e o# the hopper outlet, B, and the *ulk density, ?B, o# the m

H


11/19

INFORMATION ON MINIMUM OUTLEDIMENSION

Parameters

+##e(tive #ri(tion an'le, !0

Material-all inter#a(e #ri(tion an'le,

60.!

/lo #un(tion, 4 1.$!

;riti(al stress, critical 6.$ k:a

The an'le o# the hopper, 10.6

@lope o# the hopper all, H


12/19

VOLUME OF HOPPER

olume o# the limestone in the hopper in a produ(tion o# a one hour pro(ess

Mass orate, 8,000 tonnes-day

$!0,000 k'-hour

/or inlet diameter o# 0.!m, area, A 0.1%86m$

Bulk density, ?B 18!%.8 k'-m6

elo(ity (an *e determined *y the #ormula,

elo(ity is (al(ulated to *e 989.6% m-hr


13/19

olume orate, C (an *e determined *y the #ormula

The volume o rate is determined to *e 1!0.86D9 m6-hr

There#ore, in one hour, the volume o# limestone in the hopper is 1!0


14/19

DIMENSIONS OF HOPPER

There are three main dimensions in desi'nin' a hopper. Amon' them

;oni(al se(tion dimension

;ylindri(al-*in se(tion dimension

Inlet se(tion dimension

The re(ommended dimensions o# the hopper desi'n #or handlin' 1!0o# limestone is to have $ hoppers ith the (oni(al se(tion to have a hm, (ompared to the la* s(ale o# 0.Dm.


15/19

CONICAL

With the hei'ht o# (oni(al se(tion to *e 8m, the an'le o# the hopper,

10.! and the outlet diameter (al(ulated to *e 0.7$9!m, the diamete(onne(tin' the (oni(al se(tion to the (ylindri(al se(tion (an *e deterusin' tri'onometri( #un(tions.

The (ylindri(al se(tion diameter is (al(ulated to *e 1.6071!m

The volume o# the (oni(al se(tion is determined usin' the #ormula

The volume o# the (oni(al se(tion is determined to *e 1$.99!1m6


16/19

DIMENSIONS FOR CONICAL SECTIO


17/19

HEIGHT OF CYLINDRICAL/BIN SECT

The hei'ht is determined *y the remainin' volume #rom the (oni(a

and the diameter o# the (ylindri(al se(tion.

With the previous re(ommendation, the volume #or one hopper is n

The volume in the (ylindri(al se(tion only ill no *e

The hei'ht, h o# (ylindri(al se(tion (an *e determined usin' the #o

The hei'ht o# the (ylindri(al se(tion is determined to *e 11.9179m


18/19

DIMENSIONS FOR CYLINDRICAL SEC


19/19

OVERALL DIMENSIONS OF HOPPE

hopper slide 2.0.pptx

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