Frequently asked questions
Drawing
How do I split a line in two? Each outlet has only one stream. Use a Splitter (fractions per outlet), a Distributor (equal parts) or a splitting unit (trouser chute, splitter box). On a tank, increase the Number of outlets.
Do I need to draw a mixer to combine two streams? No. An inlet accepts several streams and adds them up. If you want to show the junction on the drawing, use the Stream junction or the tank nozzles.
Dragging the background no longer moves the view. Why? Dragging the background draws the selection rectangle, as in CAD. To pan the view, scroll (wheel or trackpad), use the scroll bars or drag while holding the space bar or the middle button.
How do I move units to another tab? Drag them to the tab in the bar, or cut (Ctrl+X) and paste (Ctrl+V) on the other tab. The streams get connectors automatically.
Can I copy units from one project to another? Not yet. Copy and paste work within the same project.
I deleted a stream and the numbering has a gap. Stream numbers cannot be edited: the gap stays, and the next stream takes the number after the highest one. To identify streams, give them a Name in the stream panel.
Balance
The balance does not calculate. What is missing? Read the summary above the stream table: it lists what prevents the calculation (Feed without SG, without particle size, unit not connected, value out of range…).
The closure difference is not zero. Usually there is a warning about insufficient water or a recycle that did not converge. Read the summary warnings and check the Products: every stream that leaves the process must end in a Product.
The solids volume "does not close" on a unit. You specified SGs on outlets that, together, do not conserve the solids volume of the feed. Specify the SG only where it was measured and let the balance calculate the others.
I specified 65 % solids and the stream came out more dilute. The balance only adds water. If the stream already arrives more dilute than requested, it warns you and leaves it as it is. To thicken, use a thickener, cyclone or filter.
Why does the mill give the same P80 when I change the cyclone? The mill product is defined by the P80 you specify; it is not a grinding simulation. See the limits in Equipment.
Why does the screen give the same grade in the oversize and the undersize? Grade by size class does not exist yet. Specify the grades measured on the outlets, if you have them.
Water
What is the difference between Water feed and Water addition? A Water feed is a source of water in the process (its own line, in blue). A Water addition adds water in the middle of a line, at a fixed flow rate or up to a % solids.
The flow rate of my Water feed is locked. It is connected to the water intake of a unit and became automatic: the flow rate is what the unit requires.
How do I calculate the fresh make-up water? From the balance closure. A process water tank with automatic make-up does not exist yet.
Grades
A grade appeared in red, above 100 %. The grades specified on the outlets of a separator do not close with the feed. Check the mass recoveries and the grades specified on that unit.
How is the metallurgical recovery shown? In Balance closure → Grades and distribution: the share of the analyte that goes to each process output.
The drawing came out small or with illegible names. Turn on View ▾ → PDF sheet limits and arrange the drawing inside the dashed area. If it does not fit, use a larger sheet or split into tabs.
The logo came out with a white background. Transparency turns white in the PDF. Use a logo designed for a white background.
Can I remove "made with miningflow.app" from the PDF? Yes, in My account → Preferences.
Account and projects
Do my preferences apply on another computer? Yes. Theme, grid, date format, row order, PDF credit and My analytes are stored in your account.
I opened the project in two browser tabs and saving stopped. The editor prevents one tab from overwriting the other. Close one of them and reopen the project.
How do I send a project to a colleague? From the project list, send a copy to their e-mail. The copy is independent: neither of you sees the other's changes.
