This paper presents a study of the geometrical design of optimum cutting shapes in granite or marble slabs with the aim of improving cutting operations and reducing tailings in ornamental stone sawshops.
Many new technologies have emerged in recent years to keep tailings frozen, with plenty of advances including passive refrigeration systems like thermosyphons, which remove underground heat, as well as physical impediments like thick gravel covers and dry stacking, the latter of which reduces tailings to about 85percentt solid (compared to traditional slurries which are about 50 percentt solid).
Many new technologies have emerged in recent years to keep tailings frozen, with plenty of advances including passive refrigeration systems like thermosyphons, which remove underground heat, as well as physical impediments like thick gravel covers and dry stacking, the latter of which reduces tailings to about 85percentt solid (compared to traditional slurries which are about 50percentt solid).
Phytostabilization has been advocated as a promising approach to reduce mine tailings' adverse effects to surrounding environment.
To increase the recovery of copper and reduce losses, the tailings are frequently reground and passed through a second flotation, the concentrate from which is combined with the initial production.
Reactive transport simulations using the field and laboratory data show adsorption of As to the tailings and diffusive transport of dissolved As in the tailings should reduce the source term concentration of As to between 40% and 70% of the initial concentrations over the 10 ka simulation period.
Our laboratory in Devon, Alberta is also leading the development of dry stackable tailings in the oil sands which could cut water consumption in half and reduce the need for tailings ponds.It is also important to note that the industry is increasingly employing drilled or in situ oil sands production.
The results from pilot scale flotation tests on an Outokumpu flotation unit are presented, which confirm that froth flotation is effective to reduce sulphide contents of tailings.
PCR amplification was performed using forward primers labeled with fluorescent dyes (FAM, YakimaYellow, ATTO 565, and ATTO 550) and reverse primers (Armo01 Armo03) with a 7-bp (GTTTCTT) extension at the 5′-end to reduce stutter bands ("PIG-tailing"; Brownstein et al., 1996).
