Re: Minimal Slope Of Aggregate Slurry Pipe?
I would like to know following before making any comment:
1. Concentration of 7:1 is by volume or weight ?
2. Roughness of pipeline ?
3. PSD (particle size distribution) of solids: I am more interested in fraction of coarsest particles (1" size) to be transported.
4. Are you planning the hydraulic transportation by gravity alone?
D.R. Kaushal ■
Re: Minimal Slope Of Aggregate Slurry Pipe?
Great,
The ratio is by volume; 1.58-cu/yds/min water: 0.266-cu/yds/min solids.
As for the PSD, it depends on the layer of glacial-fluvial material being worked and thus varies considerably.
To date, sampling procedures have been focused on gold values while overlooking PSD.
Once the ground thaws, I will address this, but for now, I will have to guesstimate that the fraction of 1” material can be as high as 50%.
Thank you, ■
Flow Of Solids
Hi Tim Dunk,
Sound like you have a tricky problem.
Your first guess should be the existing slope, because this is the result of a full scale test.
Are you talking gravity flow, or pump discharge? The key is the minimum velocity to keep your 25 mm particles rolling, and the solids from settling. The answer is pretty standard for slurry pumping applications. For that you need to talk to a slurry pump Vendor. Their technical department has data for this type of problem, based on experiments with transportation of sands and gravels.
Regards - John.rz ■
Minimal Slope of aggregate slurry pipe?
Greetings,
Would appreciate any point of view regarding hydraulic transportation of aggregate from wash-plant, for 150’ to sluice boxes/jigs, then again into pipe for 350’ to tailings pond.
Volume of 500gal/min including solids
The water to solids ratio is roughly 7:1
Solids are composed of silt, sand, rounded and angular gravels, up to 1”.
If feasible, and since I already posses some 10” Victaulic pipe, planned on using this before expending on something else.
Aim to increase dumping height by minimizing pipeline slope. Some sections will be buried and others suspended from rock embankment.
Can anyone estimate a slope to begin with?
Thank you, ■