Page 384 - Chemical Process Equipment - Selection and Design

12.4. EQUIPMENT FOR SIZE REDUCTION

~ performance of Ball, Pebble, and Rod Mills in Continuous and Batch Modes
[a) Capacities of Some Straight-Sided Ball Mills on Quartz to Various Meshes

-CaImcity (tiins per 24 tin) hiciliiiiidiarcl Qiiiirta--
2-irn to 1-in to ?(-in to )*-in fci 1i-m tis It)1111
35 rncah 48 ineah G5 ~ncnli I00 iiiurrli t'(W iiieali hiill
15 11 9 6 33
20 16 14 9 33 10 15
25 21 19 12 7 33 12 15
3 5 31 29 18 9 33 1735 20
50 46 44 27 13 33 24 25
42 34 30 22 12 28 17 20
63 55 50 31 I6 28 28 30
.--
116 108 103 62 26 28 49 50
SI 63 55 40 22 26 34 40
130 116 110 67 33 26 57 60
250 236 224 136 54 26 103 125
(Denver Equiprneni Go.).
(b) Hardinge Conical Ball Mills in Continuous Wet Grinding; Dry Grinding Rates Are 10-20%
Less

----Caprity (tons per 24 11rs)-
--\Vcight of---- Weirht of Balls Motor lji-in to >;-in to >;-into98%
SiZE hlall Lining Mnxiinurn (Ib) Rpme (riiar. hp) 10 niexh 100 111~11 -325 nw~ih
3' x2.1" 3,050 2,400 2,400 39.8 10 32 12 4
5' x22" 40,200 8,oQo 8,300 30.4 40 140 49 19
(iU x36" 17,100 11,700 17,500 27.7 75 282 07 38
23,000 43,500 23.8 200 820 274 108
IOf X 66" 50,600 35,000 83,508 21.2 450 1,900 632 2.19

(Hardinge Co.).
(E) Hardinge Conical Pebble Mills in Continuous Wet Grinding; Dry Grinding Rates Are
10-20% Less
--Capacity (tons per 24 11rs)-
----Weiaht of- Weight of Balk Motor l!$-in to >;-in to )h-in togs%
Size Mill Lining hlaxirnum (Ibs) Rym+ (rnax. hp) 10 mesh 100 mesh -325 mesh
3' X 2.1f' 3,000 1,300 700 40.4 5 15 5.5 2.1
9x22" 9,GOO 4,000 2,300 31.2 15 54 19 7.5
6'X 3Gr' 16,500 6,500 3,800 28.2 30 117 42 17
8'9<48" 19,400 12,300 12,700 24.1 76 326 115 45
10' X 60'' 35,900 16,800 25,500 21.4 150 675 242 95
(l-lardinge Co.).

(d) Pebble and Balls Mills for
Pebble Charge 50 ~01%. Steel
------Pebble Mills- Ball Mills-
Ca ncity.
P.D. of Capacity, Dry Grin by mg
Mill Steel Grinding (lbs) Approx.
No. Cylinder Porcelain BuhWne rpm (Ibs) Rpm (e) Performance of Marcy Rod Mills
8j$A 24-X 24'# 96 40 188 36
JiC 24 X 36'' 145 90 280 36
A 30 X 36'' 86 440 32
8 36 x 4.P 32 940 29
29 1152 f&7
1 19 2936 17
1 A 72 x 7-T' 3456 16 5076 14
1. C 72 X 120'' 59 16 8460 14
(Mine and Smelter Division, Kennedy Van Saun Go).
(Paul Abbe h.).