Flowsheet from File

It is possible to create a Flowsheet object from a file. This example demonstrates how to create a Flowsheet object from a file.

import inspect
from pathlib import Path

import pandas as pd
from matplotlib import pyplot as plt

from elphick.geomet.flowsheet import Flowsheet
from elphick.geomet.flowsheet.stream import Stream
from elphick.geomet.utils.data import sample_data

__file__ = Path(inspect.getfile(inspect.currentframe())).resolve()

YAML file

The yaml file needs to follow this structure.

yaml_filepath: Path = Path(__file__).parents[2] / 'elphick/geomet/config/flowsheet_example_simple.yaml'
yaml_config: str = yaml_filepath.read_text()
yaml_config

'FLOWSHEET:\n  flowsheet:\n    name: Flowsheet\n  streams:  # graph edges\n    Feed:\n      name: Feed\n      node_in: feed\n      node_out: screen\n    Coarse:\n      name: Coarse\n      node_in: screen\n      node_out: lump\n    Fine:\n      name: Fine\n      node_in: screen\n      node_out: fines\n  operations:  # graph nodes\n    feed:\n      name: feed\n    screen:\n      name: screen\n    lump:\n      name: lump\n    fines:\n      name: fines\n'

Create Flowsheet

fs: Flowsheet = Flowsheet.from_yaml(yaml_filepath)
fs

<elphick.geomet.flowsheet.flowsheet.Flowsheet object at 0x7f8eacc89780>

The Flowsheet object can be visualized as a network. The streams are not yet populated, so are shown in red.

fs.plot()
plt

<module 'matplotlib.pyplot' from '/home/runner/work/geometallurgy/geometallurgy/.venv/lib/python3.10/site-packages/matplotlib/pyplot.py'>

Load the data

Load data onto two of the three streams.

df_feed: pd.DataFrame = sample_data()
obj_feed: Stream = Stream(df_feed, name='Feed')

# assume the Coarse stream is 0.4 of the Feed stream mass
df_coarse: pd.DataFrame = df_feed.copy()
df_coarse['wet_mass'] = df_coarse['wet_mass'] * 0.4
df_coarse['mass_dry'] = df_coarse['mass_dry'] * 0.4
obj_coarse: Stream = Stream(df_coarse, name='Coarse')

fs.set_stream_data(stream_data={'Feed': obj_feed, 'Coarse': obj_coarse})

fs.plot()
plt

<module 'matplotlib.pyplot' from '/home/runner/work/geometallurgy/geometallurgy/.venv/lib/python3.10/site-packages/matplotlib/pyplot.py'>

Solve the flowsheet

fs.solve()
fs.plot()
plt

<module 'matplotlib.pyplot' from '/home/runner/work/geometallurgy/geometallurgy/.venv/lib/python3.10/site-packages/matplotlib/pyplot.py'>

Plot the mass balance

fig = fs.table_plot(plot_type='network')
fig