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The making of best quality anode in Inalum - Part 1: Paste Plan — Transcript

by Edwin EA · 4,252 words · 755 segments · language en · Watch on YouTube

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0:02[Music]
0:28[Music]
0:34hello it is a pleasure to be able to
0:36meet with my comrades in aluminium
0:38smelter World in this occasion I want to
0:42present the making of anod carbon in our
0:44company hope it can give inspiration to
0:47younger employees especially for those
0:49who work in Platinum in alen any ideas
0:52for the betterness of this presentation
0:54material is waited thank you
0:57[Music]
1:13carbon roll in aluminium
1:15smelter one the hall here ruled
1:18process aluminum oxide all 203 is
1:22dissolved in Molen cry alina3
1:25L6 it is decomposed electrolytically
1:27between carbon and aluminum electrodes
1:29at about 950° C to aluminum and
1:33oxygen the carbon anod is continuously
1:36consumed by reacting with the oxygen to
1:38give carbon dioxide
1:40CO2 to all 23 + 3 C equals for all + 3
1:45CO2 two reasons why carbon is used as
1:50electric carbon are highly stable
1:52requiring high temperature to react even
1:54with
1:55oxygen carbon has the highest melting
1:58and sublimation point of all elements
2:01thus irrespective of its allotropic form
2:04carbon remains solid at higher
2:06temperatures than the highest melting
2:09point Metals such as tungsten
2:11perenium although thermodynamically
2:14prone to oxidation carbon resists
2:16oxidation more effectively than elements
2:19such as iron and copper that are weaker
2:22reducing agents at room
2:24temperature three carbon known in
2:26various multi-atomic structures with
2:28different molecular config ation called
2:31allotropes the three relatively
2:33well-known allotropes of carbon are
2:35morphis carbon graphite and Diamond
2:38which one of these allotropes can be
2:41used as anal in aluminium reduction
2:47process
2:49amorphous the amorphous form is
2:51essentially graphite but not held in a
2:53crystalline macro
2:56structure
2:57graphite at normal pressur carbon takes
3:00a form of graphite in which each atom is
3:03bonded
3:04trigonally two three others in a plane
3:06compos the fused hexagonal Rings the
3:10resulting network is two
3:11dimensional and the resulting flat
3:13sheets are stacked and loely bonded
3:15through weak van vse forces this gives
3:20graphite its softness and its cleaning
3:22properties the sheets slip easily past
3:24one another because of the
3:26delocalization of one of the outer
3:28electrons of each atom to form a fight
3:31Cloud graad fight conducts electricity
3:34but only in the plane of each calent
3:36bonded
3:38sheet
3:40Diamond that very high pressured carbon
3:43forms the more compact Petro Diamond
3:46here each atom is
3:48bonded tetrahedrally to four others thus
3:51making a three-dimensional network of
3:53puckered six membered rings of
3:55atoms that's why Diamond to be an
3:57excellent electrical insulator
4:03so it is obviously that alrod which is
4:05able to be used as anod material is
4:12graphite this is micro structure of
4:15graphite made asod due to the highest
4:18temperature might be possible happen in
4:20aluminium reduction pot still below 1,
4:24100° C so it is no need to prepare
4:27denser graphite just enough in between
4:301,000° c 1, 1400° c
4:35[Music]
5:07what criteria are needed from
5:09[Music]
5:11anod criteria for anodes one high
5:16resistance to gasification in order to
5:18minimize dusting and excess of carbon
5:20consumption two sufficient mechanical
5:23strength for structural integrity and
5:25handling three Clow specific electrical
5:28resistance value for power consumption
5:31four high Elemental Purity to avoid
5:34contaminating the reduced metal and
5:36excess anal consumption five high
5:39thermal shock resistance to avoid cell
5:45disruptions where is our positioned in
5:47these tough
5:50demand one
5:53gd80 typical
5:561.55
5:581.65 in Alum 1.64
6:031.69 status better two
6:08bd80 typical
6:111.50
6:131.60 in Alam
6:161.59
6:181.65 status better three AP typical 0.5
6:272.0 in Alam
6:300.3
6:320.5 status better for CS typical 40 55
6:41in Alum 28 49 status better five FS
6:50typical 8.0
6:5314.0 in Alam 11.0
6:5815.0 status better 6 TC typical 3.0
7:074.5 in Alum 3.2
7:114.0 status 7
7:16R2 typical 65 990 in Alum 89
7:2393 status better 8 r rc2
7:30typical 84
7:3295 in Alum 95
7:3797 status
7:47better great is it so difficult to
7:50achieve these
7:56figures unfortunately no at all
8:00no sacred matters
8:05here everything has been striped by R&D
8:14carbon we just follow it in the correct
8:16direction and
8:23doing some proper adjustments to adapt
8:26plant condition and current
8:31raw material is being used here the
8:34steps of anod
8:44manufacturer let's talk about the first
8:47step raw
8:50material
8:57CX caline Coke
9:00green Coke is residual fraction of
9:02petroleum or crude oil which has a very
9:04weak amorphous structure and still has
9:06volatile matter in between 8 up to 12%
9:09cook through delayed cooking process
9:11then calcinated by giving heat treatment
9:13to make it as electric quality Coke or
9:15caline
9:19Coke the Coke's texture
9:43smelter grade Cokes should have not too
9:45high real density and having tolerable
9:47impurities content to High real density
9:50will bring worse consequence during
9:52production and at last giving impact to
9:56Quality pitch
10:01for bonding grains it is used binder
10:04from liquefied
10:08CDP colar pitch col tar which is dewied
10:13heated up to approximately 350° Kel use
10:16and finally flash cold distillation
10:18process will become cold tar pit so what
10:22is cold tar pit complex mixture between
10:25polycyclic aromatic and heterocyclic
10:27compounds with aliphatic and function
10:29groups attached to the rinks
10:31approximately 90% of col tar pitch
10:34consists of three up to seven ring
10:35aromatic compounds with molecular
10:37weights ranging between 170 up to 380
10:41the remaining portion is made up of
10:43higher molecular weight carbonaceous
10:45materials that are not soluble why col
10:48tar pitch is choosed as binder one
10:51strong adherence or bonding to the
10:53aggregate two satisfactory wedding
10:57characteristics three High cooking value
11:00yielding a strong structure fourth low
11:03relative cost and ready avability in
11:05large quantities five low Ash and sulfur
11:09content six smooth volatile emission
11:12across the anode Bay temperature
11:22range cold tar pitch properties one
11:26softening point is used to describe the
11:28change in Pitch between a solid to
11:30liquid form two cooking value is an
11:34indicator of the likely residual carbon
11:35retained in the form of pitch Coke after
11:38baking three pitch density and CH ratio
11:42is an indication of the pitch
11:43aromaticity denser pitches have a higher
11:46aromaticity and thus produce denser
11:48baked anodes kesy of a binder carbon
11:50yield four quinine insoluble or Qi
11:54describes the amount of particles in
11:55soluble in quinine solvent alpha
11:57particles to be qi
11:59there are two type of Qi one primary
12:03formed in the coke oven so it is good
12:05for anode quality to secondary and
12:08mesophase formed by additional heat
12:09treatment note mesophase is harmful to
12:12anode quality five toine and solubles or
12:16TI beta resin is TI reduced by Qi it
12:20will give beneficial to bond your
12:22forming ability of pitch with Coke
12:24particles six viscosity is used to guide
12:28handling pitch liquid form and paste
12:29mixing and forming seven distillation of
12:33lighter fractions lower temperature
12:35distillation of the lighter fractions is
12:37a measure of the pitch volatile content
12:39and lighter fractions that are released
12:41in the temperature range 270° cus up to
12:45360°
12:46CSUS 8 ash content is an indicator of
12:50total impurities in
12:56Pitch the most important parameter from
12:59CDP is s
13:17p the material comes from rotting plant
13:21according to R&D carbon dust and Grains
13:24less than 1 mm must not be recycled and
13:26treated as waste
13:36how it could be what is the reason for
13:39R&D carbon the answer will come in a
13:46moment the last sodium content increases
13:49higher in line with thiner grains so
13:53that's why it is strictly not
13:54recommended in order to get better anal
13:57the bad character H can tent in ther
13:59should be minimized in usage for
14:03recycling that's all for the first step
14:06of anod manufacture next I'm going to
14:09explain how to make
14:20paste let's talking about the second
14:23step making good
14:26paste paste
14:31raw materials for paste are Aggregate
14:33and binder let's talk these raw
14:35materials one by one starting with
14:38aggregate aggregate is a mixing of Cokes
14:40and butts there are two preconditions
14:43should be fulfilled to get better
14:45aggregate one aggregate grains
14:47composition should be in the determined
14:53grometry according to rmd carbon there
14:56are four possibilities of grometry
14:59one intended to make denser green block
15:02with low porosity which is at last after
15:04baking it is H we can get high r value
15:07this kind of granulometry is our choice
15:10two intended to make denser green block
15:13with low porosity which is at last after
15:15baking it is hoped we can get low AP
15:17value unfortunately this kind of
15:20granulometry caused weaker physical
15:22strength three intended to make stronger
15:25anal after baking but unfortunately this
15:27kind of granulometry has lower R and A
15:30values fourth it must be avoided the
15:33worst grometry
15:38option our choice granulometry no one in
15:41implementation organized such
15:46as the granulometry or distribution of
15:49grain
15:50size to have denser anod the
15:54grometry should be arranged as the first
15:57course 16 mm down to 8 mm is
16:0110% the second course 8 mm down to 4 mm
16:05is
16:0610% medium to millime down to
16:090.125 mm is
16:1230% find below 0.125 mm is 50%
16:37two aggregate impurities side. e sodium
16:40calcium nickel and padium should be
16:42lower than determined values impurities
16:46should be attained in certain tolerable
16:51range catalytic
16:53impurities impurities which give bad
16:55impact to metal quality silicium Iron
16:58vadium nickel titanium and Lead
17:01impurities which give bad impact to
17:03anode consumption vadium nickel sodium
17:06potassium and calcium impurities which
17:09give bad impact to energy and current
17:11efficiency padium and
17:13phosphorus impurities which give bad
17:16impact to pollution sulfur hydrogen and
17:22Lead now I show how to prepare Cokes
17:33Co dis harded from silos by ratio high
17:35sulfur low sulfur equals 60 minutes and
17:3840
17:50seconds through damper DP if Coke Silo
17:53level is still above 40% no need bypass
18:09in server sr1 grains separated into the
18:12size batch above 18 mm and in range
18:16three 18 mm
18:30in silver sr2 grains separated into
18:33three size batch range three 1 mm range
18:371 0.2 mm and Below 0.2
18:53mm grains with size over 18 mm is
18:56crushed by Crusher to be ther than 5 mm
19:00and then send back to
19:13sr1 the Surplus in in one feedback into
19:16Crusher to increase finer grain size
19:19product
19:32to get finess grains with size below 0.2
19:35mm M into
19:48milk the Surplus inin to feedback to
19:51tube M to increase production of finess
20:07fine comes from dust collecting system
20:09or bag filters
20:35pay attention on the texture comparison
20:37between coses and butts
21:00let's magnify and after doing it can you
21:02catch any differences between them
21:31black color on coke is more dominant
21:33than butts these black color spots are
21:36assumed as
21:38porosity butts have denser texture than
21:41Cokes or in other words butts is weer
21:44than CES next images show which one is
21:47the best composition we should take
21:50composition one one all is buts two at
21:56the same volume it is weer than
21:58composition two and three three bonding
22:01among grains is not enough strong due to
22:03have only gluing and no
22:05anchoring for their reactivity and a
22:08permeability of the product anod will be
22:11worse so obviously that composition one
22:14is not
22:22recommended composition two one all is
22:26CX two at the same volume it is lighter
22:30than composition one and three three it
22:33is going to consume more binder four
22:37many problems will occur after
22:39baking so obviously that composition to
22:42is not also
22:49recommended composition three one mix
22:53between butts and cokes two at the same
22:57volume it has an ideal weight three
23:00optimal pitching can get obviously this
23:04is the composition should be applied
23:31point to be aimed is how to get the best
23:33composition between butts C in aggregate
24:17Based on data showing in the chart there
24:19are three conditions should be paid
24:21attention carefully one benefit got by
24:24using corer butts grain grain size in
24:27between 0 5 til to 16 mm is reducing
24:30porosity up to
24:3270% two meanwhile corser Co grain
24:36decreases 50% porosity three significant
24:40impact coming from finer grain either
24:42CES or butts let's say it's able to
24:45reduce porosity above
24:4790% in this range area it's better to
24:50utilize butts in order to increase
24:53weight and at last will be increased the
24:55density
25:10in this range area it's better to
25:12utilize butts in order to increase
25:14weight and at last will be increased the
25:16density
25:28in this range area consider to use same
25:30portion of Cokes and
25:42butts maximize Cokes in this area there
25:46are no significant white difference this
25:48can also avoid dirty butts thus entering
25:51the aggregate so let's skin the density
25:54of butts and cokes on each areas
26:06from the granulometry composition we
26:08have chosen we can get
26:20data now we make a simulation to look
26:22for the best composition to get higher
26:24density
26:49let's do trial and error method to fill
26:51the table
27:24but ratio equals 34% and vbd aggregate
27:27equals 0
27:299,323 g/
27:31CC CDP must be in liquid form in order
27:34to act as binder but before talking
27:36further please acknowledge information
27:39regarding
27:45CDP in depth with CDP one by using many
27:50different kind of solvent like alcohol
27:53toine and
27:54quinoline substances on Pitch can be
27:57grouped as alzin molecular weight is
28:00under 100 toine soluble molecular weight
28:04100 tilted
28:061,000 quinoline soluble molecular weight
28:091,000 till to
28:183,000 two the sticky characteristic of
28:22pitch conted mainly by Beta resin which
28:25is a difference of quinoline insoluble
28:27toine ins soluble beta resin equals KY T
28:32note more beta resin greater than better
28:34sticky characteristic of
28:36binder so to represent more beta Risin
28:39greater than increase amount of key this
28:42is commonly done by add lighter
28:44fractions into
28:46desolation this will increase the risk
28:48of metaphase appearance
29:07three sometimes too high key content
29:09will give bad impact to pump
29:12performance it's strainer clog by a thin
29:14layer so be wise in choosing CDP
29:29mesophase theoretical
29:31review when Pitch is made aeromatic
29:34systems are growing up in thermolyses
29:36and leads to a
29:37sufficiency High concentration of large
29:40aeromatic systems with molecular weights
29:42approximate to 600
29:44a.m mesophase occurs if some critical
29:47parameters EG viscosity heating rate and
29:50others are met the mesophase is strongly
29:53an isotropic and takes a spherical form
29:55in order to minimize its surface energy
30:03further about
30:04mapase at further heating or increasing
30:07residance time more and more mesophase
30:09is formed from the isotropic pitch the
30:12size of the mesophase Spheres increases
30:14and they start to coales into bigger and
30:17bigger anisotropic
30:19areas the transition from a flowing or
30:21plastic pitch to a rigid SM Coke green
30:23Coke occurs in a narrow temperature
30:26interval around 500 ° C still the
30:29significant amount of hydrogen is
30:31present but most will be gone when the
30:33temperature reaches 800° C so obviously
30:38that too much mesap phase with high
30:40diameter will leave behind voids after
30:42baking process it's clearly harming anod
30:45quality and this is so
30:51bad this data informed the amount of
30:53mesophase and heat adjustment to keep
30:56hitch viscosity in order to keep as good
30:58binder
31:02agents this data informed the additional
31:04percentage of pitch in order to cover
31:06the existence of mesophase in
31:24binder what kind of pitching shall it be
31:26achieved in order to get good hod let's
31:29no kind of level pitch given into paste
31:32case
31:35one under
31:40pitching under pitching symptoms one dry
31:44paste two cracks on GB three underling
31:50lack of volatiles fourth poor mechanical
31:54properties five air burn problem in pot
31:58case
32:01two over
32:07pitching watch out over pitching at last
32:11and bond grains due to co greater than
32:13adhesion over ping
32:16symtoms one wet paste two glowing paste
32:22three extreme shrinkage four stum hole
32:26deformation SL slide ping five crack
32:30during baking excessive de
32:32validation six sticking of packing
32:36material seven high air permeability
32:39compressive strength and Young's
32:43modulus so what does the optimal
32:46pitching look like case
32:51three optimal
32:55pitching optimal pitching one still left
33:00void two no separate bonding among
33:03grains now we have came to how to
33:06achieve optimal hit thinging by setting
33:08correct binder
33:10ratio to do this firstly we have to know
33:14the limit of over pitching by comparing
33:16slumping on BB
33:38watch out look at figures 15% and next
33:42higher level in this range gb80 is not
33:46in line with bb80 anymore what does it
33:50mean yes of course gb8 can be made
33:54Higher by increasing binder level but
33:57result after baking delimitate it so
34:01this phenomenon becoming the first sign
34:05of over
34:07pitching secondly check the sticking
34:09either amount or pattern on
34:13BB remember there are two kind of sticky
34:17things on BB just after discharging from
34:20baking furnace one isolation CX two
34:26another blocks
34:28whatever the sticking kind this pointing
34:31to the second indicator of over pitching
34:34note we apply constrainted value
34:372% of sticking on BB from the total BB
34:44discharged listing the figures into Data
34:46Bonk for the next product please keeping
34:49this data Bonk
34:51update are there any different
34:53methods there are two methods to detect
34:56binder sufficiency
34:58it should be done by operator during
35:00inspection one physical inspection on GB
35:04condition looking for symptoms of over
35:07pitching like glowing on GB crust length
35:11shrinkage greater than 3
35:13mm two observation on paste condition
35:17just before forming like flexity tough
35:21for fragile now we have come into the
35:24making of
35:26paste
35:56e e
36:31beware kept the temperature of this
36:33pasted product all plus 10° see than
36:36temperature needed in forming machine
36:38what should be paid attention in
36:40knitting or mixing
36:43operation what should be paid attention
36:45inting or mixing
36:47operation one softening point is P value
36:50of the current
36:53CDT important an Alum using balling
36:57methods
36:58so it has to be adjusted by -5° C for
37:02operation purpose correlation between
37:06softening point and mixing temperature
37:08is described by equation Y = 1.48 X +
37:145.6 where y equals mixing temperature x
37:18equals softening point for
37:20example if SB equals 113° c so mixing
37:25temperature equals 172 8°
37:29C by implementing Black's principle we
37:32have formula for thermal
37:36balance let's say we have data s p of
37:40CDP from India equals 113° c binder
37:44ratio equals
37:4714.5% heating up temperature for CDP
37:50equals 210 de C heating up temperature
37:54for aggregate equals 160° c
37:57how big additional temperature should be
38:00given answer first we are looking for
38:03mixing
38:04temperature put in SB value into the
38:07first Formula we have
38:09172.2 4° C put in data into the second
38:13formula we have equation
38:160.145 asterisk 210 T =
38:200.855 asterisk T 160 so we will get t
38:26equal 16 7.25 de C greater than we need
38:305.59 de C more let's try to implement
38:34this
38:37formula please follow the movement of
38:39star pointer on the
38:55chart this situation takes place if no
38:58additional heat so it is strictly
39:07prohibited in order to achieve
39:09appropriate mixing
39:11temperature an additional heat from
39:13meter should be
39:24given two the second important fact
39:27during kneading process is specific
39:29mixing
39:31energy mixing energy the best practice
39:35in in Alam to get homogeneous taste is
39:38by
39:39implementing mixing energy inside a
39:41tight space from 8.9 up to 9.1 kilow
39:46flash T paste below this range paste
39:49looks dry Above This range paste looks
39:54wet three mixing time
40:09look either shorten or prolong the
40:11mixing time in fact it is no
40:18use important stuff related to mixing
40:21time too short makes under pitching too
40:24long may destroy granulometry of the
40:26grains
40:28what we want is sufficient time in order
40:30to give binder and finess centering
40:34macroporosity of grains to create anchor
40:36bonding among binder Matrix outside and
40:40inside
40:41grains note it is applied mixing time
40:44around 5 minutes please look at
40:47description comes in a moment inside
40:50meter forces C binder Matrix to enter
40:53Cox grains
41:00after cooling this binder Matrix will
41:02build stronger bonding compared to
41:03gluing only
41:30let's talk about the two Road step paste
41:36forming steps of shaking machine
41:41operation One charging paste into the
41:44ready mold note paste is not something
41:49liquid so it cannot fulfill the whole
41:52Space inside the mold automatically we
41:55have to arrange hits spreading evenly
41:58during filling time in order to avoid
42:01sticking of paste in the mold wall
42:04precaution actions should be done before
42:06forming like a heating up or keeping
42:09temperature stable B spraying special
42:12oil and water in the wall
42:14regularly see removing resident the mold
42:17from the previous
42:24forming in order to get one side having
42:27better density we can increase thickness
42:30on this side paste profile intentionally
42:33created not
42:35flat or you can't try for the opposite
42:39side two put cover weight down and then
42:43lock up what should be paid attention
42:46regarding cover weight a to waight the
42:49cover weight leads to grain
42:50destruction and thus to an insufficient
42:53strength of the EG node B to light the
42:56cover weight result in a poor density
42:59and an excessive gas
43:03permeability note specific forming
43:06pressure versus anal
43:08crosssection vation y = -
43:124591 x superscript 3 + 1655 x
43:16superscript 2 1931 x +
43:208.7 y equals specific forming pressure
43:23bar x equal anod crosssection m
43:26superscript 2
43:28two three evacuating unnecessary gas
43:32repa emission by vacuum usually for
43:35better result man make it below 120
43:42MPR it's time for vibrating now
44:05fourth vibro compassion operation
44:08tips paste temperature put into the mold
44:11should be in between
44:12155° C til to 165° C avoid paast
44:18temperature variance Federal into mold
44:19vary more than plus SL 2° C in order to
44:24get better result it is strongly
44:26suggested to make put paste temperature
44:29close to the highest constraint equals
44:32165° c this effort is going to decrease
44:36viscosity so it is easier for grains
44:39moving to find its Optimum place in mold
44:42during
44:49vibration DB and are o this is control
44:54program on the vro comping machine
44:57control principle by this program can be
44:59explained one the first priority the
45:03machine look for gb80 value or GB height
45:07if one of these Target is found then
45:10stop two secondly if during set maximum
45:14fpr compassion running these two Targets
45:17don't get then
45:18stop note the machine is completed by
45:21weighing scale and height sensor so it
45:25is able to adjust the amount of
45:27paste Federal if the height of previous
45:29block down
45:36below
45:38beware just after forming block exhibit
45:41a low mechanical stability due to the
45:43softness of binder pitch in order not to
45:47damage the block handling with care is a
45:50must so to release block from mold
45:53Pusher should be run gently it finish
45:57prepare to form next block
46:29cooling after forming after forming GB
46:32temperature is still high it exhibits
46:35low mechanical stability due to this
46:38reason it needs to be
46:40cooled this is very important phase on
46:42the making of anodes mishandling will
46:45cause damage on GB one cool to intensify
46:49may
46:50cause surface fissures are generated due
46:53to shrinkage of GB crust two
46:56insufficient cooling may
46:58cause damage on GB during subsequent
47:01handling storage and
47:03processing here in a moment show to you
47:06the steps of cooling
47:16phase be careful this period needs a lot
47:19of care or just leave it more safe
47:32this is a sample when weak crust is in
47:34dangerous period but handled
48:06just before I end this
48:08presentation let me explain how to keep
48:11the
48:23quality first of all you should know
48:26well the basic te knowledge NGB
48:28production do you know
48:37it the most important thing from paste
48:40plant to make sure the GB product always
48:43in the good quality or just to control
48:46impurities content coming from raw
48:48material and get ideal
48:50gb80 as simple as that isn't it
48:58I have developed the formula to predict
48:59ano quality based on GD data calculation
49:03result with this Formula compared by
49:05actual result show just the little
49:08difference plus minus
49:141% 1 R2 equal -
49:18216218 then I
49:2197215 3 v 105.4 one5 no plus 190 . 783
49:27CA + 1.6 for 2 s 2.33 6 gb8 + 106.1
49:34183 where R2 equals air reactivity
49:37residue percent then I equals nickel
49:39content percent V equals padium content
49:42percent a equals sodium content percent
49:45C equals calcium content percent s
49:48equals sulfur content
49:53percent two r r c o 2 = -
49:58238.9 for1 c 24.25 3 46.0 to2 V plus
50:051.15 s + 9652
50:084 where R rc2 equals Co to reactivity
50:13residue percent C equals calcium content
50:15percent equals sodium content percent V
50:19equals padium content percent s equals
50:21sulfur content percent
50:28so by controlling each impurities
50:30involved and arrange ideal gb80 best
50:32quality anodes are in our
50:35hand regarding achievement and ideal gb8
50:38like or dislike it depends on the
50:40goodness of equipment and skill and
50:43blending raw material experience is the
50:46key but here I just share some tricks
51:03there are two conditions Down Under and
51:05Over the Top basically both of them are
51:09caused by
51:10grometry counter measure for down under
51:13one increase the usage of corser butts
51:16material if enabled two in case you
51:20don't have corser butts consider
51:22increased butts
51:23ratio three in case you have only
51:26sufficient butt stock consider to
51:28decrease production capacity counter
51:31measure for over the top one decrease
51:35the usage of corser butts material if
51:37enabled two in case you don't have finer
51:41butts consider to crush it three in case
51:45you have too much butt stock consider to
51:47increase production
51:54capacity in this position the cause is
51:57still same with down
51:59undercase just use the same trick to
52:01overcome this
52:08problem in this position the cause is
52:11informing machine or Neer just follow
52:14the tricks already explained to overcome
52:16this
52:25problem for

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