| 1. |
|
|
| 2. |
- Manouchehri, Hamid-Reza, et al.
(author)
-
Changing potential for the electrical beneficiation of minerals by chemical pretreatment
- 1999
-
In: Minerals & metallurgical processing. - 0747-9182. ; 16:3, s. 14-22
-
Journal article (peer-reviewed)abstract
- The responses of calcite, feldspar and quartz minerals in a laboratory free-fall electrostatic separator after tribocharging with stainless steel, PVC and copper plates were investigated. The effects of H3BO3 and BaCl2 chemical pretreatment on the electrical properties of the above minerals were examined. The changes in the electrical properties are discussed along with the determined charge, dielectric constant and electrical conductivity of the mineral samples. The electrical properties of the minerals and their responses to the electrical field during separation after tribocharging and chemical pretreatment are explored relative to the electrical behavior of the minerals
|
|
| 3. |
|
|
| 4. |
- Wani, M. F., et al.
(author)
-
Friction and wear of HPSN bearing materials
- 1997
-
In: American Ceramic Society Bulletin. - 0002-7812 .- 1945-2705. ; 76:8, s. 65-69
-
Journal article (peer-reviewed)abstract
- Paper presents data on wear and friction of hot-pressed silicon nitride (HPSN) and its composites in contact with ball-bearing steel. The coefficient of friction under unlubricated sliding conditions was 0.45, and it did not change with load under lubricated conditions. The wear coefficient was the least for HPSN sintered with liquid in system containing yttria. HPSN containing 15 % of TiC showed the best wear resistance compared to HPSN with other concentrations of TiC or BN. No adhesive wear was detected.
|
|
