Page 386 - Chemical Process Equipment - Selection and Design

12.4. EQUIPMENT FOR SIZE REDUCTION 349

ABLE 12.7-(continued)
(c) Rotary Cutters for Fibrous Materials
Feed
Screen rate,
Material opening Ib./hr. Hp. Air Remarks on product
Amosite asbestos 12 1000 11 Yes Finer fiber bundles average
pencils length 2"
Cellophane Dags 11. 200 10 Yes Finer than &"
32
Cork - 525 16 Yes 90% 4/24'' sieve
3 I,
16
Chemical cotton 60 mesh 120 15 Yes Flock; 35% under No. 100
$ sieve
Leather scrap 600 20 Yes Precutting before shredding
Fiberglass 3. 300 18 Yes 1" (approx.) lengths
16
Waste paper - 338 13 Yes Through No. 4 sieve and
5 I,
16
finer
Sheet pulp $0 mesh 150 15 Yes Flock; 85%, 40/100 sieve
Tenite scrap -,I 16 340 12 No Granulated for reuse
Vinylite scrap - 300 15 Yes 35%. 6/10 sieve; granular
7 ,I
5
2 Geon sheet 32 I, 540 11 No 99%. 4/20 sieve; for mold-
-
16
ing granules
Cotton rags 3. 500 11 Yes No linting
4
Buna scrap 10 mesh 264 12 Yes Granular
Neoprene scrap :O mesh 90 14 Yes 20"F, temperature rise
Soft-wood chips - n 960 12 Yes 90%. 10/50 sieve
8
Hard-wood chips - 290 11 Yes 83%. 20/100 sieve
1 I,
I^
IO
* 90 per cent 4/24 sieve. ie., 90 per cent is through No. 4 and on No. 24 sieve.
(Sprout-Waldron Co.).
TABLE 12.8. Petformanse of Jaw and Roll Crushers
(a) Capacities rand Data on Blake Type Jaw Crushers (Selected
Items)a
Capacity (tons/hr)
Size of (1 ton to 20 tuft Capacity)
Jaw Open Side Setting (in.) Jaw Horse
Opening - Motion Power
(in.) 1 1; 2 2; 3 4 (in.) Req. rpm
10x7 7 9 12 7; 300 (c) Relation of Capacity, Size of Feed, Roll Setting, and Speed
8 li! 16 of Rolls for Sturtevant Balanced Crushing Rolls; Screening in
2ox 10 15 20 24 31 15 275 Closed Circuit (Average Rock, Which Can Be Nipped at Speeds
24 32 40 49 Named)
30 X 18 38 45 61 A 11 40 250
48 60 74 102 B> l6 Size of Roll Feed Roll
Dia X Face Cubes Setting Speed Capacity
(in.) (in.) (in.) (rpm) (tons/hr)
" A-straight jaw plates; B-nonchoking jaw plates.
*(Data supplied by Allis-Chalmers Mfg. Co., Milwaukee, WI). 16 X 10 1.25 0.61 200 26.6
1 0.25 21 2 11.6
0.75 0.2 225 9.8
(b) Double Toothed-Roll Crushers on Coal 0.50 0.125 245 6.67
0.25 0.065 272 3.86
Roll Size Maximum Capacity
(in.) Size WW Minimum 24x 15 2 1 115 56.4
Lump Roll Reducing to Motor 1.5 0.54 130 34.4
Die Face (in.) (rpm) 1; to 2 (nw 1 0.25 140 17.15
0.75 0.2 150 14.7
0.5 0.125 163 10
48 18 4 150 39-67 8
38 28 4 150 46-75 8-10 36 X 20 3 1.5 59 87
18 24 4 150 52-88 10-12
2.5 1 62 61
24 18 14 125 46-74 12-18 2 0.5 70 34.2
24 20 14 125 54-82 15-20 1.5 0.37 78 29.2
24 24 14 125 62-98 15-20 1 0.25 85 20.9
(Stephens-Adamson Co.) (Sturtevant Mill Co.).