Slag takes a ton of electricity to make, but everything in the early game requires slag to produce, including fuel. For all of the early game, you don't have enough electricity to make more slag, and don't have enough slag to fuel more electricity. Thus you end up spending most of the first 10 hours twiddling your thumbs waiting for stuff to finish, with absolutely nothing you can do to speed things up.

In order for this mod to actually be fun, Slag generation should be done in a smaller building that requires significantly less electricity, and generates it much MUCH faster.

(Also, smaller complaint, a lot of the early technologies require electrical circuits, which you can't build until much later)

Stupid kid, thats what this modpack is about, dont play factorio if you dont enjoy these extreme conditions or are too stupid to progress at the start

For anyone interested, we increased the slag production of electrolyzers from 1 to 3, and are having a lot more fun. It makes the early game SIGNIFICANTLY more balanced, while still being extremely challenging. We are still constantly running out of power/slag/everything else, but now we can generally actually do something about it, rather than sit and twiddle our thumbs waiting.

To do this, open %APPDATA%\Factorio\mods\angelspetrochem_0.7.12\prototypes\recipespetrochem-basics.lua, and change this line:
{type="item", name="slag", amount=1}
to this:
{type="item", name="slag", amount=3}

If you making a base 6 fictional ores(Saphirite, Rubyte and some), "Mud water -> Geode -> Crystal Slurry -> Mineral Sludge -> Fictonal Ores" method is saving your energy.