|
Mineral Composition |
Chemical Composition |
Garnet (Almandite)........ >98.0%
Ilmenite ....................... <1.0%
Quartz ......................... <0.5%
Others ......................... Trace | |
Almandite Garnet ........ Fe3Al2(SiO4)3
Garnet, a homogenous mineral, contains no free chemicals, all oxides and dioxides are combined chemically. |
| Physical Characteristics |
Other Characteristics |
Bulk density ........ 131-137 lbs/ft3
Specific Gravity .... 4.0
Hardness (Mohs) .. 7.50
Melting Point ...... 1,250°C
Particle Shape... Sub-rounded to sub-angular Reactivity .........Inert |
Radioactivity ............... Not detectable above background
Moisture Absorption ...... Non-hygroscopic
Total Chlorides ............. Less than 50 ppm
Free Iron .................... Less than 0.01%
Copper ....................... Less than 0.01%
Other Heavy Metals ....... Less than 0.01% |
|
Sizing - Typical % Retained |
Recommended Blasting Conditions |
|
|
|
Grade |
|
U.S. Mesh |
#16 |
#36 30x40 |
|
|
16 |
4 |
|
|
|
18 |
12 |
|
|
|
20 |
32 |
1 |
|
|
25 |
43 |
12 |
|
|
30 |
8 |
36 |
|
|
35 |
1 |
40 17 |
|
|
40 |
|
10 33 |
|
|
45 |
|
1 35 |
| 50 11 60 3 70 1 |
Nozzle pressure ................. 90+ psi
Nozzle size ............ typically #6 or larger
Work distance ................... 18-24 inches |
Suggested Reading: Barton's "Blasting Guidelines" |
