Stone Furnace

A **Stone Furnace** is a smithing tool.

Stone Furnace is a better version of Adobe Forge with no uses limit and longer time of firing (35 seconds). To compensate for its usefulness, the building process is much more complicated and requires a Multipurpose Newcomen Engine.

## Stone Kiln

Stone Kiln is the Stone Furnace without the Bellows and serves the same purpose as Adobe Kiln. It can be used to smith in batches by putting a stack of items in it, adding kindling and firing with a firebrand.

Items that can be made in batches in the Stone Kiln:

* Quicklime
* Charcoal
* Coke
* Clay Bowls
* Clay Plates
* Bricks
* Firebricks

Bowl of QuicklimeBasket of CharcoalBasket of CokeClay BowlClay PlateBrickFirebrick
## Crafting

> *For the visual guide, check twotech page for the Stone Kiln crafting recipe*
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You will need an iron for an iron door. Heat the iron ore in the adobe forge, put on a flat rock and hit it once with a smithing hammer to get wrought iron; heat it up again and put it once more on the flat rock and hammer it five times to get the iron door.
Dig up two big rocks, put a chisel on it and hit it with a mallet to cut it in two, pick up the chisel and put it again on the split rock (don't pick up the pieces), hit with the mallet to get cut stones. Pick up one of those with a basket and add to the biger pile. It will make a mixed cut stones. Put those on pit stakes. Add a shovel of concrete. Add the rest of small cut stones to the Fireplace to make the kiln. At last, add the iron door.

## How to use

### Stone Kiln

Put kindling inside the Stone Kiln. Fire it with a firebrand. Pick up items you want to smith using the tongs and touch the stone kiln. Drop the smithed items on the ground; some of them, like bowls and plates, may be stacked. Before 35 seconds pass, touch the stone kiln with the firebrand or a straight shaft to close the door - that's how you make charcoal.

### Batch smithing

Fill the stone kiln with items you want to batch smith, like kindling or limestone. If you put in something that's not kindling, add one kindling and fire it with a firebrand. Close the door (you will need to use the firebrand or the straight shaft for it). After 30 seconds your product is ready. You can take it out with an empty hand, tongs, bowl or basket, depending on what the product is.

### Stone Furnace

Add bellows to the stone kiln. Put a basket of charcoal or basket or coal in and fire it with a firebrand. The coke makes the fire in the stone furnace last longer, but its use is not recommended unless you have infinite supply of coal. Using tongs, pick up the items you want to smith and touch the stone furnace with them. Then, put the heated metal on a flat rock or an anvil and hit it with a smithing hammer. Some things, like crucibles, can't be hammered, so put those on the ground to cool them.

> *For all the items that can be smithed in the stone furnace, check the 'How to use' segment for the Firing Stone Furnace on the twotech page.*
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## Tips

* Coal is also used in the Blast Furnace, so unless you have a level 4 coal mine (infinite supply of coal), it is recommended not to use coal/coke in the stone furnace.
* As stone kiln needs concrete to be build and one wheelbarrow of concrete holds 6 uses, build a stone fireplace and more stone furnaces, too. Maybe build a brick oven if you can. The rest of concrete you can use to make concrete floor.
* Stone furnace doesn't have a use-limit, so building it as soon as possible is recommended for easing the smithing process.