Rich Slag is the highest of the three slag grades in the Ala Industrial mod for Minecraft 26.2 Java Edition, which runs on both Fabric and NeoForge. The Recycler, an LV machine that consumes 8 EU/t, casts Rich Slag when a full batch of 64 mass units holds all three waste fractions — mineral, metal and burnable — with no fraction above half. Variety decides the grade, not volume: 16 cobblestone in a row casts Poor Slag, while stone, a worn pickaxe and a couple of planks in the same batch cast Rich Slag. A whole tool, weapon or piece of armour weighs 8 mass units, a block 4, an ordinary item 2, and junk the Recycler does not recognise 1.

Rich Slag has a single consumer: the Alloy Smelter. Firing two Double Carbon Rods together with one Rich Slag costs 1200 EU and 150 ticks (7.5 seconds) and yields one Carbon Briquette — the same briquette that would otherwise take two ordinary Slag or four Poor Slag, so a well-sorted batch cuts the slag bill to a quarter. The Carbon Briquette then splits into four Ceramic Plates at a quench press built from vanilla blocks, and four plates make one Carbon Ceramic block, which makes Rich Slag the efficient end of the mod's coal chain. Rich Slag stacks to 64 and carries no fuel value: briquette firing is everything Rich Slag does today.