Ushirikiano
SANAA
UREMBO NA USTAWI
UJANJA
UTAMADUNI NA HISTORIA
BURUDANI
MAZINGIRA
CHAKULA NA VINYWAJI
UHANDISI WA KINYUME
SAYANSI
MICHEZO
TEKNOLOJIA
VAZI
Iron Ball Mill: Grüson Drum with a Stepped Die Ring and Two Screens (Richards, 1903)
The Grüson ball mill: a drum turning on a horizontal axis, charged with chilled iron or steel balls of mixed sizes. The balls grind the ore against each other and against a stepped die ring. The ground ore passes out through a coarse and a fine screen; the oversize is carried back in.
Result: a mill for fine grinding of cement, fertiliser, clay and soft ores, wet or dry. Sizes from 0.66 m to 1.83 m across.
Source: R. H. Richards, Ore Dressing, vol. I (1903), § 225, Figs. 172a-b and Table 149. Unknown: dimensions beyond the table, and the materials of the side plates, screens and shaft. Picture: Richards, Figs. 172a-b.
Juu
Unknown
Maagizo
1
1
Make the drum and the die ring
Make the drum and the die ring
The drum is two side plates (b) joined round the edge by the die ring (a). The die ring is five perforated, spiral plates of chilled iron. Each plate laps the next, so they form steps: the balls drop from one step to the next, and the space under each step lets the oversize from the screens back in. Not given: the side-plate material, sizes, hole sizes.
Vifaa kwa hatua hii:
Vitu vya chuma cha kusubu5 die plates, chilled iron
Nyenzo isiyojulikana2 side platesZana zinazohitajika:
Vipimo visivyojulikana
Spana inayoweza kurekebishwa2
2
Put the two screens round it
Put the two screens round it
Outside the die ring, fit a coarse perforated screen (c) to take the wear. It is in five parts with spaces between them and has back-deflecting holes (g). Outside that, fit a fine gauze screen (d). At the end of each section of fine screen, fix a deflector or shovel (f). As the drum turns, it carries the oversize up and back into the grinding space. Not given: the screens' metal and mesh.
Vifaa kwa hatua hii:
Bamba la chujio lenye matundu1 coarse screen, 5 parts
Nguo ya chekecheke ya waya uliofumwa1 fine screenNyenzo isiyojulikana5 deflectorsZana zinazohitajika:
Vipimo visivyojulikanaSpana inayoweza kurekebishwa3
3
Mount and house it
Mount and house it
Carry the drum on a horizontal shaft in two bearings; the figures show them on masonry piers. Enclose the drum in a plate iron housing with a discharge spout (e) below, a feed hopper (h) at one end, a manhole (i) and a dust pipe (k) on top. Ours: steel sheet for the plate iron.
Vifaa kwa hatua hii:
Shafti ya chuma1 mill shaft
Kishikio cha beringi2 vipande
Bati la Chuma Laini1 housing, spout, hopperZana zinazohitajika:
Spana inayoweza kurekebishwaVipimo visivyojulikana4
4
Fit the drive
Fit the drive
Drive the mill by gear and pinion. In the figure, the gear is on the mill shaft and the pinion on a countershaft that carries tight and loose pulleys. A belt from the line shaft runs on the pulleys: on the tight pulley the mill turns, on the loose pulley it stops.
Vifaa kwa hatua hii:
Gurudumu kubwa la meno1 on the mill shaft
Pinioni1 kipandeShafti ya chuma1 countershaftKishikio cha beringi2 vipande
Puli iliyobanwa na puli legevu1 kipandeZana zinazohitajika:
Mkanda wa kuendeshaSpana inayoweza kurekebishwa5
5
Charge the balls (size sets the charge)
Charge the balls (size sets the charge)
Load chilled iron or steel balls in mixed sizes; mixed sizes grind better than one size. Size is the variable: No. 0 (0.660 m drum, 45 rev/min) takes 15 kg of 40 mm and 45 kg of 80 mm balls, 60 kg in all. No. 2 (1.330 m, 30 rev/min) takes 100 kg each of 100, 115 and 125 mm, 300 kg. No. 4 (1.830 m, 25 rev/min) takes 217 kg each of the same three sizes, 650 kg. The bigger the drum, the slower it turns and the heavier its charge.
Vifaa kwa hatua hii:
Vipondaji (mipira ya chuma)300 kg for No. 2; 60 kg No. 0, 650 kg No. 4Zana zinazohitajika:
Mizani ya jukwaa ya kiwanda6
6
Grind
Grind
Feed the ore, egg-size, through the hopper and run the mill wet or dry. Power, and output per 24 hours: No. 0 takes 1/4 horse power and grinds 1,680 kg of copper ore to 15 mesh, or 840 kg of chrome iron ore to 130 mesh. No. 2 takes 2 1/2 to 3 horse power: 14,400 kg of brick bats to 20 mesh, or 1,920 kg of emery to 200 mesh. No. 4 takes 9 to 11 horse power: 12,720 kg of gold ores to 40 mesh, or 10,800 kg of chrome iron ore to 130 mesh. Wear: 1,345 kg of balls for 102,400 barrels of cement, about 0.139 lb a ton. The end plates last 18 months. Hard quartz ores wear the balls too much.
Zana zinazohitajika:
Mkanda wa kuendesha
MajiVifaa
11- 5 die plates, chilled ironKishikilia Nafasi
- 5 deflectorsKishikilia Nafasi
- 1 coarse screen, 5 partsKishikilia Nafasi
- 1 fine screenKishikilia Nafasi
- 1 countershaftKishikilia Nafasi
- 2 vipandeKishikilia Nafasi
- 1 housing, spout, hopperKishikilia Nafasi
- 1 on the mill shaftKishikilia Nafasi
- 1 kipandeKishikilia Nafasi
- 1 kipandeKishikilia Nafasi
- 300 kg for No. 2; 60 kg No. 0, 650 kg No. 4Kishikilia Nafasi
Vifaa vya Michoro Iliyounganishwa
Usambazaji 10%
Chilled Plow
na Forge
Uchimbaji chuma
49
0
0
0
1
0
Usambazaji 10%
Casting Iron in a Cupola Furnace — Re-Melting Pig Iron into Finished Castings
na Piett
Uchimbaji chuma
53
0
0
0
6
0
Usambazaji 10%
Woven Wire Screen Cloth on a Power Loom, 4 to 80 Wires per Inch (Bigelow, US 18,320, 1857)
na Charlie
Viwandani
3
0
0
0
1
0
Mchoro huu unatengeneza
Blueprint zinazohusiana
Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni
CC0 Umma Wote
Mchoro huu umetolewa chini ya CC0. Uko huru kunakili, kubadilisha, kusambaza, na kutumia kazi hii kwa madhumuni yoyote, bila kuomba ruhusa.
Saidia Mtengenezaji kwa kununua bidhaa kupitia Mchoro wao ambapo wanapata Kamisheni ya Mtengenezaji iliyowekwa na Wachuuzi, au unda marudio mapya ya Mchoro huu na uiunganishe kama kiungo katika Mchoro wako kuchangia mapato.